H POWER CORP
S-1/A, EX-1.1, 2000-07-12
MOTORS & GENERATORS
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                                                                     Exhibit 1.1

                                7,000,000 Shares

                                  H POWER CORP.

                                  Common Stock

                             UNDERWRITING AGREEMENT

                                                                  _____ __, 2000

LEHMAN BROTHERS INC.
CIBC WORLD MARKETS
DEUTSCHE BANK SECURITIES INC.
JOSEPHTHAL & CO. INC.
FIDELITY CAPITAL MARKETS,
   a division of National Financial Services Corporation
As Representatives of the several
   Underwriters named in Schedule 1,
c/o Lehman Brothers Inc.
Three World Financial Center
New York, New York  10285
Dear Sirs:

                  H Power Corp., a Delaware corporation (the "Company"),
proposes to sell an aggregate of 7,000,000 shares (the "Firm Stock") of the
Company's common stock, $.001 par value (the "Common Stock"). In addition,
certain stockholders of the Company named in Schedule 2 hereto (the "Selling
Stockholders"), propose to grant to the Underwriters named in Schedule 1 hereto
(the "Underwriters") an option to purchase up to an additional 1,050,000 shares
of the Common Stock on the terms and for the purposes set forth in Section 2
(the "Option Stock"). The Firm Stock and the Option Stock, if purchased, are
hereinafter collectively referred to as the "Stock." This is to confirm the
agreement concerning the purchase of the Stock from the Company and the Selling
Stockholders by the Underwriters.

         1.       REPRESENTATIONS, WARRANTIES AND AGREEMENTS OF THE COMPANY. The
Company represents, warrants and agrees that:

                  (a) A registration statement on Form S-1 and all amendments
         thereto, with respect to the Stock has (i) been prepared by the Company
         in conformity with the requirements of the United States Securities Act
         of 1933, as amended (the "Securities Act"), and the rules and
         regulations (the "Rules and Regulations") of the United States
         Securities and Exchange Commission (the "Commission") thereunder, (ii)
         been filed with the Commission under the Securities Act and (iii)
         become effective under the Securities Act. Copies of such registration
         statement and all amendments thereto have been delivered by the Company
         to you as the representatives (the "Representatives") of the
         Underwriters. As used in this

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         Agreement, "Effective Time" means the date and the time as of which
         such registration statement, or the most recent post-effective
         amendment thereto, if any, was declared effective by the Commission;
         "Effective Date" means the date of the Effective Time; "Preliminary
         Prospectus" means each prospectus included in a registration statement,
         and all amendments thereto, before such registration statement became
         effective under the Securities Act and any prospectus filed with the
         Commission by the Company with the consent of the Representatives
         pursuant to Rule 424(a) of the Rules and Regulations; "Registration
         Statement" means the registration statement of the Company, as amended
         at the Effective Time, including all information contained in the final
         prospectus filed by the Company with the Commission pursuant to Rule
         424(b) of the Rules and Regulations in accordance with Section 5(a)
         hereof and deemed to be a part of the registration statement as of the
         Effective Time pursuant to paragraph (b) of Rule 430A of the Rules and
         Regulations; and "Prospectus" means the final prospectus, as first
         filed by the Company with the Commission pursuant to paragraph (1) or
         (4) of Rule 424(b) of the Rules and Regulations. The Commission has not
         issued any order preventing or suspending the use of any Preliminary
         Prospectus.

                  (b) The Registration Statement conforms, and the Prospectus
         and any further amendments or supplements to the Registration Statement
         or the Prospectus will, when they become effective or are filed with
         the Commission, as the case may be, conform in all respects to the
         requirements of the Securities Act and the Rules and Regulations and do
         not and will not, as of the applicable effective date (as to the
         Registration Statement and any amendment thereto) and as of the
         applicable filing date (as to the Prospectus and any supplement
         thereto) contain an untrue statement of a material fact or omit to
         state a material fact required to be stated therein or necessary to
         make the statements therein not misleading; PROVIDED that no
         representation or warranty is made as to information contained in or
         omitted from the Registration Statement or the Prospectus in reliance
         upon and in conformity with written information furnished to the
         Company through the Representatives by or on behalf of any Underwriter
         specifically for inclusion therein.

                  (c) The Company and each of its subsidiaries have been duly
         incorporated and are validly existing as corporations in good standing
         under the laws of their respective jurisdictions of incorporation, are
         duly qualified to do business and are in good standing as foreign
         corporations in each jurisdiction in which their respective ownership
         or lease of property or the conduct of their respective businesses
         requires such qualification, and have all power and authority necessary
         to own or hold their respective properties and to conduct the
         businesses in which they are engaged except where the failure to so
         qualify would not in the aggregate have a material adverse effect on
         the Company and its subsidiaries taken as a whole. The Company has no
         subsidiaries other than H Power Enterprises of Canada, Inc. ("HPEC").


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                  (d) The Company has an authorized capitalization as described
         in the Prospectus, and all of the issued shares of capital stock of the
         Company have been duly and validly authorized and issued, are fully
         paid and non-assessable and conform to the description thereof
         contained in the Prospectus; and except as described in the Prospectus,
         all of the issued shares of capital stock of each subsidiary of the
         Company have been duly and validly authorized and issued, are fully
         paid and non-assessable and are owned directly or indirectly by the
         Company, free and clear of all liens, encumbrances, pledges, equities
         or claims.

                  (e) The unissued shares of the Stock to be issued and sold by
         the Company to the Underwriters hereunder have been duly and validly
         authorized and, when issued and delivered against payment therefor as
         provided herein, will be duly and validly issued, fully paid and
         non-assessable and free and clear of all liens, encumbrances, pledges,
         equities or claims, and good and valid title to such shares of Stock
         will be passed to the Underwriters; and the Stock will conform to the
         descriptions thereof contained in the Prospectus.

                  (f) This Agreement has been duly authorized, executed and
         delivered by the Company.

                  (g) The execution, delivery and performance of this Agreement
         by the Company and the consummation of the transactions contemplated
         hereby, including the 5-for-1 split of each of the outstanding shares
         of Common Stock, the conversion of all of the Company's outstanding
         shares of preferred stock into shares of Common Stock, the issuance of
         1,666,665 shares of Common Stock to outside investors upon conversion
         of a certain 50% equity interest in HPEC and the amendments to the
         Company's organizational instruments as described in the Prospectus
         (such actions are hereinafter collectively called the
         "Recapitalization"), will not conflict with or result in a breach or
         violation of any of the terms or provisions of, or constitute a default
         under, any indenture, mortgage, deed of trust, loan agreement or other
         agreement or instrument to which the Company or any of its subsidiaries
         is a party or by which the Company or any of its subsidiaries is bound
         or to which any of the property or assets of the Company or any of its
         subsidiaries is subject, nor will such actions result in any violation
         of the provisions of the charter or by-laws of the Company or any of
         its subsidiaries or any statute or any order, rule or regulation of any
         court or governmental agency or body having jurisdiction over the
         Company or any of its subsidiaries or any of their properties or
         assets; and except for the registration of the Stock under the
         Securities Act and such consents, approvals, authorizations,
         registrations or qualifications as may be required under the United
         States Securities Exchange Act of 1934, as amended (the "Exchange
         Act"), and applicable state or foreign securities laws in connection
         with the purchase and distribution of the Stock by the Underwriters, no
         consent, approval, authorization or order of, or filing or registration
         with, any such court or governmental agency or body is required for the
         execution, delivery and performance of this Agreement by the Company
         and


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         the consummation of the transactions contemplated hereby and the
         Recapitalization.

                  (h) Except as described in the Prospectus, there are no
         contracts, agreements or understandings between the Company and any
         person granting such person the right to require the Company to file a
         registration statement under the Securities Act with respect to any
         securities of the Company owned or to be owned by such person or to
         require the Company to include any such securities with the Stock
         registered pursuant to the Registration Statement or with any other
         securities being registered pursuant to any other registration
         statement filed by the Company under the Securities Act.

                  (i) Except as described in the Prospectus and Item 15 of Part
         II of the Registration Statement, the Company has not sold or issued
         any shares of Common Stock or any securities convertible into or
         exercisable or exchangeable for shares of Common Stock during the
         six-month period preceding the date of the Prospectus, including any
         sales pursuant to Rule 144A or Regulations D or S under the Securities
         Act, other than securities or shares issued pursuant to employee
         benefit plans, qualified stock options plans or other employee
         compensation plans or pursuant to outstanding options, rights or
         warrants.

                  (j) Except as described in the Prospectus, since the date of
         the latest audited financial statements included in the Prospectus (i)
         neither the Company nor any of its subsidiaries has sustained any
         material loss or interference with its business from fire, explosion,
         flood or other calamity, whether or not covered by insurance, or from
         any labor dispute or court or governmental action, order or decree;
         and, (ii) there has not been any change in the capital stock or
         long-term debt of the Company or its subsidiaries or any material
         adverse change, or any development involving a prospective material
         adverse change, in or affecting the business, properties, condition
         (financial or otherwise), prospects, results of operations, cash flows
         and stockholders' equity or results of operations of the Company and
         its subsidiaries taken as a whole ("Material Adverse Effect").

                  (k) The financial statements (including the related notes and
         schedules thereto) filed as part of the Registration Statement or
         included in the Prospectus present fairly the financial condition,
         results of operations and cash flows of the entities purported to be
         shown thereby, at the dates and for the periods indicated, and have
         been prepared in conformity with United States generally accepted
         accounting principles applied on a consistent basis throughout the
         periods involved ("GAAP"). The selected financial data set forth under
         the caption "Selected Financial Data" in the Prospectus and the
         Registration Statement fairly present, on the basis stated in the
         Prospectus and the Registration Statement, the information included
         therein.

                  The pro forma financial statements included in the Prospectus
         and the Registration Statement include assumptions of the Company's
         management


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         that provide a reasonable basis for presenting the significant effects
         directly attributable to the transactions and events described therein,
         the related pro forma adjustments give appropriate effect to those
         assumptions, and the pro forma adjustments reflect the proper
         application of those adjustments to the historical financial statement
         amounts in the pro forma financial statements included in the
         Prospectus and the Registration Statement. The pro forma financial
         statements included in the Prospectus and the Registration Statement
         comply as to form in all material respects with the applicable
         accounting requirements of Regulation S-X under the Securities Act and
         the pro forma adjustments have been properly applied to the historical
         amounts in the compilation of those statements.

                  (l) PricewaterhouseCoopers LLP, who have certified certain
         financial statements of the Company, whose report appears in the
         Prospectus and who have delivered the initial letter referred to in
         Section 7(h) hereof, are independent public accountants as required by
         the Securities Act and the Rules and Regulations.

                  (m) The Company and its subsidiaries have good and marketable
         title to all personal property owned by them, in each case free and
         clear of all liens, encumbrances and defects except such as are
         described in the Prospectus or such as do not materially affect the
         value of such property and do not materially interfere with the use
         made and proposed to be made of such property by the Company and its
         subsidiaries; and all real property and buildings held under lease by
         the Company or its subsidiaries are held by them under valid,
         subsisting and enforceable leases, with such exceptions as are not
         material and do not interfere with the use made and proposed to be made
         of such property and buildings by the Company and its subsidiaries.

                  (n) The Company and its subsidiaries carry, or are covered by,
         insurance in such amounts and covering such risks as is adequate for
         the conduct of their respective businesses and the value of their
         respective properties and as is customary for companies engaged in
         similar businesses in similar industries; all policies of insurance and
         fidelity or surety bonds insuring the Company or any of its
         subsidiaries or their respective businesses, assets, employees,
         officers and directors are in full force and effect, the Company is not
         in default thereunder and the Company has fully paid all premiums
         relating to such policies when due.

                  (o) The Company and its subsidiaries own or possess adequate
         rights to use all material patents, patent applications, trade and
         service marks, trade and service mark registrations, trade names,
         copyrights, licenses, inventions, trade secrets, technology, know-how
         and other intellectual property (collectively, the "Intellectual
         Property") necessary for the conduct of the Company's business as now
         conducted or as proposed in the Prospectus to be conducted. Except as
         set forth in the Prospectus (i) there are no rights of third parties to
         any such Intellectual Property, (ii) there is no material infringement
         by third parties of any such Intellectual Property, (iii) there is no
         pending or, to the Company's




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         knowledge, threatened action, suit, proceeding or claim by others
         challenging the Company's rights in or to any such Intellectual
         Property, and the Company is unaware of any facts which could form a
         reasonable basis for any such claim, (iv) there is no pending or, to
         the Company's knowledge, threatened action, suit, proceeding or claim
         by others challenging the validity or scope of any such Intellectual
         Property, and the Company is unaware of any facts which could form a
         reasonable basis for any such claim, (v) there is no pending or, to the
         Company's knowledge, threatened action, suit, proceeding or claim by
         others that the Company infringes or otherwise violates any patent,
         trademark, copyright, trade secret or other proprietary rights of
         others, and the Company is unaware of any other fact which could form a
         reasonable basis for any such claim, (vi) there is no U.S. patent or
         published U.S. patent application which contains claims that dominate
         or may dominate any Intellectual Property described in the Prospectus
         as being owned by or licensed to the Company or that interferes with
         the issued or pending claims of any such Intellectual Property, (vii)
         to the Company's knowledge, there is no Intellectual Property that any
         of the Company's competitors or other third parties have developed
         which reasonably could be expected to supersede or make obsolete any
         product or process of the Company, and (viii) there is no prior art of
         which the Company is aware that may render any U.S. patent held by the
         Company invalid or any U.S. patent application held by the Company
         unpatentable which has not been disclosed to the U.S. Patent and
         Trademark Office.

                  (p) There are no legal or governmental proceedings pending to
         which the Company or any of its subsidiaries is a party or of which any
         property or assets of the Company or any of its subsidiaries is the
         subject which, if determined adversely to the Company or any of its
         subsidiaries, could have a Material Adverse Effect; and to the
         Company's knowledge, no such proceedings are threatened or contemplated
         by governmental authorities or threatened by others.

                  (q) There are no contracts or other documents which are
         required to be described in the Prospectus or filed as exhibits to the
         Registration Statement by the Securities Act or by the Rules and
         Regulations which have not been so described or filed or incorporated
         therein by reference as permitted by the Rules and Regulations, and the
         statements in the Prospectus under the headings "Risk Factors - Any
         change in our relationship with ECO Fuel Cells, LLC would delay our
         ability to generate revenues"; "Risk Factors - Government regulation
         could impose burdensome requirements and restrictions that could impair
         demand for our stationary fuel cell products"; "Risk Factors - We may
         be unable to protect our intellectual property rights and we may be
         liable for infringing the intellectual property rights of others";
         "Risk Factors - We may become subject to risks inherent in
         international operations including currency exchange rate fluctuations
         and tariff regulations"; "Risk Factors - There may be an adverse effect
         on the market price of our common stock as a result of a significant
         number of shares being available for future sale by our existing
         stockholders"; "Business - Intellectual Property"; "Business - Legal
         Proceedings"; "Description of Capital


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         Stock"; "Shares Eligible for Future Sale" and "United States Tax
         Consequences to Non-U.S. Holders" insofar as such statements summarize
         legal matters, agreements, documents, or proceedings discussed therein,
         are accurate and fair summaries of such legal matters, agreements,
         documents or proceedings.

                  (r) No relationship, direct or indirect, exists between or
         among the Company or its subsidiaries on the one hand, and the
         directors, officers, stockholders, affiliates, associates, customers or
         suppliers of the Company or its subsidiaries on the other hand, which
         is required to be described in the Prospectus which is not so
         described.

                  (s) No labor disturbance by the employees of the Company or
         its subsidiaries exists or, to the knowledge of the Company, is
         imminent which could have a Material Adverse Effect.

                  (t) The Company and each of its subsidiaries is in compliance
         in all material respects with all presently applicable provisions of
         the United States Employee Retirement Income Security Act of 1974, as
         amended, including the regulations and published interpretations
         thereunder ("ERISA"); no "reportable event" (as defined in ERISA) has
         occurred with respect to any "pension plan" (as defined in ERISA) for
         which the Company or its subsidiaries would have any liability; neither
         the Company nor its subsidiaries has incurred or expects to incur
         liability under (i) Title IV of ERISA with respect to termination of,
         or withdrawal from, any "pension plan" or (ii) Sections 412 or 4971 of
         the United States Internal Revenue Code of 1986, as amended, including
         the regulations and published interpretations thereunder (the "Code").

                  (u) The Company and its subsidiaries have filed all federal,
         state and local income and franchise tax returns required to be filed
         through the date hereof and have paid all taxes due thereon, and no tax
         deficiency has been determined adversely to the Company or any of its
         subsidiaries which has had (nor does the Company have any knowledge of
         any tax deficiency which, if determined adversely to the Company or any
         of its subsidiaries, could have) a Material Adverse Effect.

                  (v) Since the date as of which information is given in the
         Prospectus through the date hereof, and except as otherwise described
         in the Prospectus, neither the Company nor its subsidiaries have (i)
         issued or granted any securities, (ii) incurred any material liability
         or obligation, direct or contingent, (iii) entered into any material
         transaction not in the ordinary course of business or (iv) declared or
         paid any dividend on its capital stock.

                  (w) The Company and its subsidiaries (i) make and keep
         accurate books and records and (ii) maintain internal accounting
         controls which provide reasonable assurance that (A) transactions are
         executed in accordance with management's authorization, (B)
         transactions are recorded as necessary to permit

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         preparation of its financial statements and to maintain accountability
         for their assets, (C) access to their assets is permitted only in
         accordance with management's authorization and (D) the reported
         accountability for their assets is compared with existing assets at
         reasonable intervals.

                  (x) Neither the Company nor any of its subsidiaries (i) is in
         violation of its charter or by-laws, (ii) is in default, and no event
         has occurred which, with notice or lapse of time or both, would
         constitute such a default, in the due performance or observance of any
         term, covenant or condition contained in any indenture, mortgage, deed
         of trust, loan agreement or other agreement or instrument to which it
         is a party or by which it is bound or to which any of its properties or
         assets is subject, except for such defaults, which individually or in
         the aggregate, do not and would not have a Material Adverse Effect or
         (iii) is in violation of any law, ordinance, governmental rule,
         regulation or court decree to which it or its property or assets is
         subject.

                  (y) Neither the Company nor any of its subsidiaries, nor any
         director, officer, agent, employee or other person associated with or
         acting on behalf of the Company or any of its subsidiaries, has used
         any corporate funds for any unlawful contribution, gift, entertainment
         or other unlawful expense relating to political activity; made any
         direct or indirect unlawful payment to any foreign or domestic
         government official or employee from corporate funds; violated or is in
         violation of any provision of the Foreign Corrupt Practices Act of
         1977; or made any bribe, rebate, payoff, influence payment, kickback or
         other unlawful payment.

                  (z) The Company and its subsidiaries (i) are in compliance
         with all applicable foreign, federal, state and local laws and
         regulations relating to the protection of human health and safety, the
         environment or hazardous or toxic substances or wastes, pollutants or
         contaminants, including, without limitation, the Comprehensive
         Environmental Response, Compensation, and Liability Act of 1980, as
         amended by the Superfund Amendments and Reauthorization Act of 1986,
         the Federal Water Pollution Control Act of 1972 (commonly known as the
         Clean Water Act), the Clean Air Act, the Resource Conservation and
         Recovery Act of 1976 (including the hazardous and Solid Waste
         Amendments thereto), the Solid Waste Disposal Act; the Toxic Substances
         Control Act, the Occupational Safety and Health Act of 1970, the New
         Jersey Spill Compensation and Control Act, the New Jersey Solid Waste
         Management Act, the New Jersey Air Pollution Control Act, the New
         Jersey Water Pollution Control Act, and the New Jersey Industrial Site
         Recovery Act ("ISRA"), each as amended and in effect from time to time
         (collectively, "Environmental Laws"), (ii) have received and are in
         compliance with all permits, licenses or other approvals required of
         them under applicable Environmental Laws to conduct their respective
         businesses, (iii) have not received notice of any actual or potential
         liability for investigation, remediation, or damages related to the
         disposal or release of hazardous or toxic substances or wastes,
         pollutants or contaminants, except where such non-compliance with
         Environmental Laws, failure to receive or comply with required

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         permits, licenses or other approvals, or liability could not,
         individually or in the aggregate, have a Material Adverse Effect,
         whether or not arising from transactions in the ordinary course of
         business, except as set forth in or contemplated in the Prospectus, and
         (iv) are not presently subject to the requirements of the ISRA, nor
         will they be subject to ISRA as a result of the transactions
         contemplated herein. Except as described in the Prospectus, neither the
         Company nor any of the subsidiaries has been named as a "potentially
         responsible party" under the Comprehensive Environmental Response,
         Compensation, and Liability Act of 1980, as amended.

                  (aa) Neither the Company nor any subsidiary is, nor after
         giving effect to the offering and sale of the Stock and the application
         of the proceeds thereof as described in the Prospectus will be, an
         "investment company" within the meaning of such term under the
         Investment Company Act of 1940, as amended, and the rules and
         regulations of the Commission thereunder.

                  (bb) The Company and its subsidiaries are Year 2000 compliant.

                  (cc) Except as described in the Prospectus, there are no
         transactions with any "affiliate" or "associate" (as such terms are
         defined in Rule 405 promulgated under the Act) or any officer, director
         or security holder of the Company (whether or not constituting such an
         affiliate or associate) which are required by the Act and the
         applicable rules and regulations thereunder to be disclosed in the
         Registration Statement or the Prospectus.

                  (dd) To the Company's knowledge after reasonable inquiry and
         except as described in the Prospectus under the heading "Management",
         no officer, director, nominee for director or security holder of the
         Company has any direct or indirect affiliation or association with any
         member of the National Association of Securities Dealers, Inc. (the
         "NASD").

                  (ee) The Amended and Restated Fuel Cell Product Operating
         Agreement dated March 9, 2000, by and among ECO Fuel Cells, LLC, the
         Company and HPEC, has been duly authorized, executed and delivered by
         the Company and HPEC and constitutes a valid and binding obligation of
         the Company and HPEC enforceable in accordance with its terms.

                  (ff) Those certain letter agreements executed in April 2000
         constituting waivers of registration rights by each of Duquesne
         Enterprises, Inc., Singapore Technologies Kinetics Ltd., Sofinov
         Societe Financiere D'Innovation Inc., ECO Fuel Cells, LLC and
         Hydro-Quebec CapiTech Inc. are duly authorized, executed and delivered
         by the Company and, to the extent the Company is obligated thereunder,
         constitute valid and binding obligations of the Company enforceable
         against it in accordance with their terms.


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                  (gg) That certain Stockholders' and Voting Agreement dated as
         of April 5, 2000, among the Company, Lehman Brothers, Inc., Norman
         Rothstein, Cynthia Rothstein, Allan Rothstein, Steven Rothstein, Tammy
         Rothstein, Carl Rothstein, Norman Rothstein, Trustee for Jordan H.
         Rothstein 2000 Irrevocable Trust, Norman Rothstein, as trustee for
         Nicole S. Rothstein 2000 Irrevocable Trust, Frederick Entman, Elise
         Entman, Brian Entman, Scott Entman, Gerald Entman, Trustee for Elise
         Entman, Dynamark Corp. and the other signatories thereto has been duly
         authorized, executed and delivered by the Company and constitutes a
         valid and binding obligation of the Company enforceable against it in
         accordance with its terms.

                  (hh) There are no transfer taxes or other similar fees or
         charges under federal law or the laws of any state, or any political
         subdivision thereof, required to be paid in connection with the
         execution and delivery of this Agreement or the issuance by the Company
         or sale by the Company of the Stock.

                  (ii) No subsidiary of the Company is currently prohibited,
         directly or indirectly, from paying any dividends to the Company, from
         making any other distribution on such subsidiary's capital stock, from
         repaying to the Company any loans or advances to such subsidiary from
         the Company or from transferring any of such subsidiary's property or
         assets to the Company or any other subsidiary of the Company, except as
         described in the Prospectus.

                  (jj) The Company and its subsidiaries possess all licenses,
         certificates, permits and other authorizations issued by the
         appropriate federal, state or foreign regulatory authorities necessary
         for the ownership of property or assets or to conduct their respective
         businesses, and neither the Company nor any such subsidiary has
         received any notice of proceedings relating to the revocation or
         modification of any such certificate, authorization or permit which,
         singly or in the aggregate, if the subject of an unfavorable decision,
         ruling or finding, could have a Material Adverse Effect, whether or not
         arising from transactions in the ordinary course of business, except as
         described in the Prospectus (exclusive of any supplement thereto); each
         of the Company and its subsidiaries has operated and is operating its
         business in compliance with and not in violation of any of its
         obligations with respect to each such permit and no event has occurred
         which allows, or after notice or lapse of time or both would allow,
         revocation or termination of any such permit or result in any other
         impairment of the rights of the Company or any of its subsidiaries
         under any such permit, subject in each case to such qualification as
         described in the Prospectus; and, except as described in the
         Prospectus, such permits contain no restrictions that are burdensome to
         the Company or any of its subsidiaries.

                  (kk) In the ordinary course of its business the Company
         periodically reviews the effect of Environmental Laws on the business,
         operations and properties of the Company and its subsidiaries, in the
         course of which it identifies and evaluates associated costs and
         liabilities (including, without limitation, any



                                       10
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         capital or operating expenditures required for clean-up, closure of
         properties or compliance with Environmental Laws, or any permit,
         license or approval, any related constraints on operating activities
         and any potential liabilities to third parties). On the basis of such
         review, the Company has reasonably concluded that such associated costs
         and liabilities could not, singly or in the aggregate, have a Material
         Adverse Effect, whether or not arising from transactions in the
         ordinary course of business, except as set forth in or contemplated in
         the Prospectus (exclusive of any supplement thereto).

         Furthermore, the Company represents and warrants to Lehman Brothers
Inc. that (i) the Registration Statement, the Prospectus and any Preliminary
Prospectus comply, and any further amendments or supplements thereto will
comply, with all applicable laws and regulations of foreign jurisdictions in
which the Prospectus or any preliminary prospectus, as amended or supplemented,
if applicable, are distributed in connection with the Directed Share Program (as
hereinafter defined), and that (ii) no authorization, approval, consent,
license, order, registration or qualification of or with any government,
governmental instrumentality, authority or court, other than such as have been
obtained, is necessary under the securities laws and regulations of foreign
jurisdictions in which the Directed Shares are offered outside the United
States.

         The Company has not offered or caused the Underwriters to offer
Directed Shares to any person pursuant to the Directed Share Program with the
specific intent to unlawfully influence (i) a customer or supplier of the
Company to alter the customer's or supplier's level or type of business with the
Company, or (ii) a trade journalist or publication to write or publish favorable
information about the Company or its products.

         Any certificate signed by any officer of the Company and delivered to
the Representatives or counsel for the Underwriters in connection with the
offering of the Stock shall be deemed a representation and warranty by the
Company, as to matters covered thereby, to each Underwriter.

         2. PURCHASE OF THE STOCK BY THE UNDERWRITERS. On the basis of the
representations and warranties contained in, and subject to the terms and
conditions of, this Agreement, the Company agrees to sell 7,000,000 shares of
the Firm Stock to the several Underwriters and each of the Underwriters,
severally and not jointly, agrees to purchase the number of shares of the Firm
Stock set opposite that Underwriter's name in Schedule 1 hereto. The respective
purchase obligations of the Underwriters with respect to the Firm Stock shall be
rounded among the Underwriters to avoid fractional shares, as the
Representatives may determine.

         In addition, the Selling Stockholders have granted to the Underwriters
an option to purchase up to 1,050,000 shares of Option Stock. Such option is
granted solely for the purpose of covering over-allotments in the sale of Firm
Stock and is exercisable as provided in Section 4 hereof. Shares of Option Stock
shall be purchased severally for the account of the Underwriters in proportion
to the number of shares of Firm Stock set opposite the name of such Underwriters
in Schedule 1 hereto. The respective purchase obligations of each Underwriter
with respect to the Option Stock shall be adjusted by the Representatives so
that no Underwriter


                                       11
<PAGE>

shall be obligated to purchase Option Stock other than in 100 share multiples.
The price of both the Firm Stock and any Option Stock shall be $_____ per share.

         The Company and the Selling Stockholders shall not be obligated to
deliver any of the Stock to be delivered on the First Delivery Date or the
Second Delivery Date (as hereinafter defined), as the case may be, except upon
payment for all the Stock to be purchased on such Delivery Date as provided
herein.

         3.       OFFERING OF STOCK BY THE UNDERWRITERS.

         Upon authorization by the Representatives of the release of the Firm
Stock, the several Underwriters propose to offer the Firm Stock for sale upon
the terms and conditions set forth in the Prospectus.

         It is understood that 700,000 shares of the Firm Stock (the "Directed
Shares") initially will be reserved by the several Underwriters for offer and
sale upon the terms and subject to the conditions described in the Prospectus
and in accordance with the rules and regulations of the NASD to employees and
persons having business relationships with the Company and its subsidiaries who
heretofore have delivered to the Representatives offers or indications of
interest to purchase shares of Firm Stock in form satisfactory to the
Representatives, and that any allocation of such Firm Stock among such persons
will be made in accordance with timely directions received by the
Representatives from the Company (the "Directed Share Program"); PROVIDED, that
under no circumstances will the Representatives or any Underwriter be liable to
the Company or to any such person for any action taken or omitted in good faith
in connection with such offering to employees and persons having business
relationships with the Company and its subsidiaries. It is further understood
that any shares of such Firm Stock which are not orally confirmed for purchase
by such persons by the beginning of the business day after this Agreement is
executed will be offered by the Underwriters to the public upon the terms and
subject to the conditions set forth in the Prospectus.

         4.       DELIVERY OF AND PAYMENT FOR THE STOCK. Delivery of and payment
for the Firm Stock shall be made at the offices of Greenberg Traurig, LLP, The
Met Life Building, 200 Park Avenue, New York, New York 10166 at 10:00 a.m., New
York City time, on the fourth full business day next following the date of this
Agreement or at such other date or place as shall be determined by agreement
between the Representatives and the Company. This date and time are sometimes
hereinafter referred to as the "First Delivery Date." On the First Delivery
Date, the Company shall deliver or cause to be delivered certificates
representing the Firm Stock to the Representatives for the account of each
Underwriter against payment to or upon the order of the Company of the purchase
price by wire transfer in immediately available funds. Time shall be of the
essence, and delivery at the time and place specified pursuant to this Agreement
is a further condition of the obligation of each Underwriter hereunder. Upon
delivery, the Firm Stock shall be registered in such names and in such
denominations as the Representatives shall request in writing not less than two
full business days prior to the First Delivery Date. For the purpose of
expediting the checking and packaging of the certificates for the Firm Stock,
the Company shall make the certificates representing the Firm Stock available
for inspection by the Representatives


                                       12
<PAGE>

in New York, New York, not later than 2:00 p.m., New York City time, on the
business day next preceding the First Delivery Date.

         At any time on or before the 30th day after the date of this Agreement
the option granted in Section 2 (which will expire 30 days after the date of
this Agreement) may be exercised in whole or in part from time to time by
written notice being given to the Selling Stockholders with a copy to the
Company by the Representatives. Such notice shall set forth the aggregate number
of shares of Option Stock as to which the option is being exercised, the names
in which the shares of Option Stock are to be registered, the denominations in
which the shares of Option Stock are to be issued and the date and time, as
determined by the Representatives, when the shares of Option Stock are to be
delivered; PROVIDED, HOWEVER, that such date and time shall not be earlier than
the First Delivery Date nor earlier than the second business day after the date
on which the option shall have been exercised nor later than the fifth business
day after the date on which the option shall have been exercised. The date and
time the shares of Option Stock are delivered are sometimes referred to as the
"Second Delivery Date" and the First Delivery Date and the Second Delivery Date
are sometimes each referred to as a "Delivery Date".

         Delivery of and payment for the Option Stock shall be made at the place
specified in the first sentence of the first paragraph of this Section 4 (or at
such other place as shall be determined by agreement between the Representatives
and the Selling Stockholders) at 10:00 a.m., New York City time, on the Second
Delivery Date. On the Second Delivery Date, the Selling Stockholders shall
deliver or cause to be delivered the certificates representing the Option Stock
to the Representatives for the account of each Underwriter against payment to or
upon the order of the Company of the purchase price by wire transfer in
immediately available funds. Time shall be of the essence, and delivery at the
time and place specified pursuant to this Agreement is a further condition of
the obligation of each Underwriter hereunder. Upon delivery, the Option Stock
shall be registered in such names and in such denominations as the
Representatives shall request in the aforesaid written notice. For the purpose
of expediting the checking and packaging of the certificates for the Option
Stock, the Company shall make the certificates representing the Option Stock
available for inspection by the Representatives in New York, New York, not later
than 2:00 p.m., New York City time, on the business day prior to the Second
Delivery Date.

         5.       FURTHER AGREEMENTS OF THE COMPANY. The Company agrees:

                  (a) To prepare the Prospectus in a form approved by the
         Representatives and to file such Prospectus pursuant to Rule 424(b)
         under the Securities Act not later than the Commission's close of
         business on the second business day next following the execution and
         delivery of this Agreement or, if applicable, such earlier time as may
         be required by Rule 430A(a)(3) under the Securities Act; to make no
         further amendment or any supplement to the Registration Statement or to
         the Prospectus except as expressly permitted herein; to advise the
         Representatives, promptly after it receives notice thereof, of the time
         when any amendment to the Registration Statement has been filed or
         becomes effective or any supplement to the Prospectus or any amended
         Prospectus has been filed and to furnish the Representatives with true
         and complete copies


                                       13
<PAGE>

         thereof; to advise the Representatives, promptly after it receives
         notice thereof, of the issuance by the Commission of any stop order or
         of any order preventing or suspending the use of any Preliminary
         Prospectus or the Prospectus, of the suspension of the qualification of
         the Stock for offering or sale in any jurisdiction, of the initiation
         or threatening of any proceeding for any such purpose, or of any
         request by the Commission for the amending or supplementing of the
         Registration Statement or the Prospectus or for additional information;
         and, in the event of the issuance of any stop order or of any order
         preventing or suspending the use of any Preliminary Prospectus or the
         Prospectus or suspending any such qualification, promptly to use its
         best efforts to obtain the withdrawal thereof.

                  (b) To furnish promptly to each of the Representatives and to
         counsel for the Underwriters a signed copy of the Registration
         Statement as originally filed with the Commission, and each amendment
         thereto filed with the Commission, including all consents and exhibits
         filed therewith.

                  (c) To deliver promptly to the Representatives such number of
         the following documents as the Representatives reasonably shall
         request: (i) conformed copies of the Registration Statement as
         originally filed with the Commission and each amendment thereto (in
         each case excluding exhibits other than this Agreement and the
         computation of per share earnings) and (ii) each Preliminary
         Prospectus, the Prospectus and any amended or supplemented Prospectus;
         and, if the delivery of a prospectus is required at any time after the
         Effective Time in connection with the offering or sale of the Stock and
         if at such time any events shall have occurred as a result of which the
         Prospectus as then amended or supplemented would include an untrue
         statement of a material fact or omit to state any material fact
         necessary in order to make the statements therein, in the light of the
         circumstances under which they were made when such Prospectus is
         delivered, not misleading, or, if for any other reason it shall be
         necessary to amend or supplement the Prospectus in order to comply with
         the Securities Act or the Rules and Regulations, to notify the
         Representatives and, upon their request, to prepare and furnish without
         charge to each Underwriter and to any dealer in securities as many
         copies as the Representatives may from time to time reasonably request
         of an amended or supplemented Prospectus which will correct such
         statement or omission or effect such compliance.

                  (d) To file promptly with the Commission any amendment to the
         Registration Statement or the Prospectus or any supplement to the
         Prospectus that, in the judgment of the Company or the Representatives,
         may be required by the Securities Act or requested by the Commission.

                  (e) Prior to filing with the Commission any amendment to the
         Registration Statement or supplement to the Prospectus or any
         Prospectus pursuant to Rule 424 of the Rules and Regulations, to
         furnish a copy thereof to the Representatives and counsel for the
         Underwriters and obtain the consent of the Representatives to the
         filing.

                                       14
<PAGE>

                  (f) As soon as practicable after the Effective Date, to make
         generally available to the Company's security holders and to deliver to
         the Representatives an earnings statement of the Company and its
         subsidiaries (which need not be audited) complying with Section 11(a)
         of the Securities Act and the Rules and Regulations (including, at the
         option of the Company, Rule 158).

                  (g) For a period of five years following the Effective Date,
         to furnish to the Representatives copies of all materials furnished by
         the Company to its shareholders and all public reports and all reports
         and financial statements furnished by the Company to the principal
         national securities exchange upon which the Common Stock may be listed
         pursuant to requirements of or agreements with such exchange or to the
         Commission pursuant to the Exchange Act or any rule or regulation of
         the Commission thereunder.

                  (h) Promptly from time to time to take such action as the
         Representatives may reasonably request to qualify the Stock for
         offering and sale under the securities laws of such jurisdictions as
         the Representatives may request and to comply with such laws so as to
         permit the continuance of sales and dealings therein in such
         jurisdictions for as long as may be necessary to complete the
         distribution of the Stock; PROVIDED that in connection therewith the
         Company shall not be required to qualify as a foreign corporation or to
         file a general consent to service of process in any jurisdiction.

                  (i) For a period of 180 days from the date of the Prospectus
         not to, directly or indirectly, (1) offer for sale, sell, pledge or
         otherwise dispose of (or enter into any transaction or device which is
         designed to, or could be expected to, result in the disposition by any
         person at any time in the future of) any shares of Common Stock or
         securities convertible into or exchangeable or exercisable for shares
         of Common Stock (other than the Stock and shares issued pursuant to
         qualified stock option plans or other employee compensation plans
         existing on the date hereof or pursuant to currently outstanding
         options, warrants or rights), or sell or grant options, rights or
         warrants with respect to any shares of Common Stock or securities
         convertible into or exchangeable or exercisable for shares of Common
         Stock (other than the grant of options pursuant to option plans
         existing on the date hereof), or (2) enter into any swap or other
         derivatives transaction that transfers to another, in whole or in part,
         any of the economic benefits or risks of ownership of such shares of
         Common Stock, whether any such transaction described in clause (1) or
         (2) above is to be settled by delivery of shares of Common Stock or
         other securities, in cash or otherwise, in each case without the prior
         written consent of Lehman Brothers Inc.; and to cause each officer,
         director, 5% Stockholder, and each of the parties listed in Section
         7(o) hereof to furnish to the Representatives, prior to the First
         Delivery Date, a letter substantially in the form set forth in Exhibit
         A attached hereto.

                  (j) Prior to the Effective Date, to apply for the quotation of
         the Stock on the Nasdaq National Market and to use its best efforts to
         complete that listing,


                                       15
<PAGE>

         subject only to official notice of issuance and evidence of
         satisfactory distribution, prior to the First Delivery Date.

                  (k) To apply the net proceeds from the sale of the Stock as
         described in the Prospectus.

                  (l) To take such steps as shall be necessary to ensure that
         neither the Company nor any subsidiary shall become an "investment
         company" within the meaning of such term under the Investment Company
         Act of 1940 and the rules and regulations of the Commission thereunder.

                  (m) The Company will not directly or indirectly take any
         action designed to or which has constituted or which might reasonably
         be expected to cause or result in, under the Exchange Act or otherwise,
         stabilization or manipulation of the price of any security of the
         Company to facilitate the sale or resale of the Stock.

                  (n) In connection with the Directed Share Program, the Company
         will ensure that the Directed Shares will be restricted to the extent
         required by the NASD or the NASD rules from sale, transfer, assignment,
         pledge or hypothecation for a period of three months following the date
         of the effectiveness of the Registration Statement. Lehman Brothers
         Inc. will notify the Company as to which participants in the Directed
         Share Program will need to be so restricted. The Company will direct
         the removal of such transfer restrictions upon the expiration of such
         period of time.

                  (o) The Company will pay (i) all fees and disbursements of
         counsel incurred by the Underwriters in connection with the Directed
         Share Program and (ii) stamp duties, similar taxes or duties or other
         taxes, if any, incurred by the Underwriters in connection with the
         Directed Share Program.

         Furthermore, the Company covenants with Lehman Brothers Inc. that the
Company will comply with all applicable securities and other applicable laws,
rules and regulations in each foreign jurisdiction in which the Directed Shares
are offered in connection with the Directed Share Program.

         6.       EXPENSES. The Company agrees to pay (a) the costs incident to
the authorization, issuance, sale and delivery of the Stock and all taxes
payable in that connection; (b) the costs incident to the preparation, printing
and filing under the Securities Act of the Registration Statement and all
amendments and exhibits thereto; (c) the costs of distributing the Registration
Statement as originally filed and each amendment thereto and all post-effective
amendments thereof (including, in each case, exhibits), each Preliminary
Prospectus, the Prospectus and each supplement to the Prospectus, all as
provided in this Agreement; (d) the costs of producing and distributing this
Agreement and all other related documents in connection with the offering,
purchase, sale and delivery of the Stock; (e) the filing fees incident to
securing any required review by the NASD of the terms of sale of the Stock; (f)
all applicable listing and


                                       16
<PAGE>

other fees; (g) the fees and expenses of qualifying the Stock under the
securities laws of the several jurisdictions as provided in Section 5 (h) and of
preparing, printing and distributing a blue sky memorandum (including related
fees and expenses of counsel to the Underwriters); (h) all costs and expenses of
the Underwriters, including the fees and disbursements of counsel for the
Underwriters, incident to the offer and sale of shares of the Stock by the
Underwriters to employees and persons having business relationships with the
Company and its subsidiaries, as described in Section 3; and (i) all other costs
and expenses incident to the performance of the obligations of the Company and
the Selling Stockholders; PROVIDED that, except as provided in this Section 6
and in Section 11, the Underwriters shall pay their own costs and expenses,
including the costs and expenses of their counsel, any transfer taxes on the
Stock which they may sell and the expenses of advertising any offering of the
Stock made by the Underwriters.

         7.       CONDITIONS OF UNDERWRITERS' OBLIGATIONS. The respective\
obligations of the Underwriters hereunder are subject to the accuracy, when made
and on each Delivery Date, of the representations and warranties of the Company
and the Selling Stockholders contained herein, to the performance by the Company
and the Selling Stockholders of their obligations hereunder, and to each of the
following additional terms and conditions:

                  (a) The Prospectus shall have been timely filed with the
         Commission in accordance with Section 5(a); no stop order suspending
         the effectiveness of the Registration Statement or any part thereof
         shall have been issued and no proceeding for that purpose shall have
         been initiated or threatened by the Commission; and any request of the
         Commission for inclusion of additional information in the Registration
         Statement or the Prospectus or otherwise shall have been complied with.

                  (b) No Underwriter shall have discovered and disclosed to the
         Company on or prior to such Delivery Date that the Registration
         Statement or the Prospectus or any amendment or supplement thereto
         contains an untrue statement of a fact which, in the opinion of
         Greenberg Traurig, LLP, counsel for the Underwriters, is material or
         omits to state a fact which, in the opinion of such counsel, is
         material and is required to be stated therein or is necessary to make
         the statements therein not misleading.

                  (c) All corporate proceedings and other legal matters incident
         to the authorization, form and validity of this Agreement, the Custody
         Agreement and the Power of Attorney, the Stock, the Registration
         Statement and the Prospectus, and all other legal matters relating to
         this Agreement and the transactions contemplated hereby shall be
         reasonably satisfactory in all material respects to counsel for the
         Underwriters, and the Company and the Selling Stockholders shall have
         furnished to such counsel all documents and information that they
         reasonably may request to enable them to pass upon such matters.

                  (d) Fulbright & Jaworski L.L.P. shall have furnished to the
         Representatives its written opinion, as independent general counsel to
         the


                                       17
<PAGE>

         Company, addressed to the Underwriters and dated such Delivery Date, in
         form and substance reasonably satisfactory to the Representatives, to
         the effect that:

                           (i) The Company has been duly organized and is
                  validly existing as a corporation in good standing under the
                  laws of Delaware, is duly qualified to transact business and
                  is in good standing as a foreign corporation in each
                  jurisdiction in which its ownership or lease of property or
                  the conduct of its business requires such qualification,
                  except where the failure to so qualify would not have a
                  Material Adverse Effect, and the Company has all power and
                  authority necessary to own and lease, as applicable, its
                  properties and conduct the businesses in which it is engaged;

                           (ii) The Company has an authorized capitalization as
                  described in the Prospectus, and all of the issued and
                  outstanding shares of capital stock of the Company (including
                  the shares of Stock being delivered on such Delivery Date)
                  have been duly and validly authorized and issued, are fully
                  paid and non-assessable, and conform to the description
                  thereof contained in the Prospectus; all of the issued and
                  outstanding shares of capital stock of each subsidiary of the
                  Company have been duly and validly authorized and issued, are
                  fully paid, and non assessable and are owned of record by the
                  Company and, to such counsel's knowledge, are owned
                  beneficially by the Company, free and clear of all liens,
                  encumbrances, equities, pledges or claims; based on that
                  certain letter dated July 6, 2000 from The Nasdaq Stock
                  Market, Inc., all shares of Common Stock (including the Stock)
                  have been approved for quotation on the Nasdaq National Market
                  under the symbol "HPOW," subject to official notice of
                  issuance and evidence of satisfactory distribution; the
                  certificates for the Stock are in valid and sufficient form;
                  and, except as described in the Prospectus, no options,
                  warrants or other rights to purchase, agreements or other
                  obligations to issue, or rights to convert, exercise or
                  exchange any obligations into or for any securities or
                  ownership interests in the Company are outstanding;

                           (iii) Other than the transactions expressly
                  contemplated by this Agreement, there are no preemptive or
                  other rights to subscribe for or to purchase, nor is there any
                  restriction upon the voting or transfer of, any shares of the
                  Common Stock (including the Stock) pursuant to the Company's
                  (a) charter or by-laws or (b) any agreement or other
                  instrument known to such counsel;

                           (iv) All real property and buildings held under lease
                  by the Company and its subsidiaries are held by them under
                  valid, subsisting and enforceable leases, with such exceptions
                  which do not materially interfere with the use made and
                  proposed to be made of such property and buildings by the
                  Company and its subsidiaries;

                                       18
<PAGE>

                           (v) To such counsel's knowledge and other than as
                  described in the Prospectus, there are no legal or
                  governmental proceedings pending to which the Company or any
                  of its subsidiaries is a party or by which any property or
                  assets of the Company or any of its subsidiaries is bound or
                  subject which, if determined adversely to the Company or any
                  of its subsidiaries, could have a Material Adverse Effect,
                  and, to such counsel's knowledge, no such proceedings are
                  threatened or contemplated by any governmental authorities or
                  threatened by others;

                           (vi) The Registration Statement was declared
                  effective under the Securities Act as of the date and time
                  specified in such counsel's opinion, the Prospectus was filed
                  with the Commission pursuant to the subparagraph of Rule
                  424(b) of the Rules and Regulations specified in such opinion
                  on the date specified therein and, to the knowledge of such
                  counsel, no stop order suspending the effectiveness of the
                  Registration Statement has been issued and, to the knowledge
                  of such counsel, no proceeding for that purpose is pending,
                  contemplated or threatened by the Commission;

                           (vii) The Registration Statement and the Prospectus
                  and all further amendments and supplements thereto made by the
                  Company prior to such Delivery Date (other than the financial
                  statements and related schedules, as to which such counsel
                  need express no opinion) comply as to form in all material
                  respects with the requirements of the Securities Act and the
                  Rules and Regulations;

                           (viii) The statements contained in the Prospectus
                  under the headings "Risk Factors - Any adverse change in our
                  relationship with ECO Fuel Cells, LLC would delay our ability
                  to generate revenues"; "Risk Factors - There may be an adverse
                  effect on the market price of our common stock as a result of
                  a significant number of shares being available for future sale
                  by our existing stockholders"; "Business - Legal Proceedings";
                  "Description of Capital Stock"; "Shares Eligible for Future
                  Sale"; "United States Tax Consequences to Non-U.S. Holders,"
                  insofar as such statements refer to statements of law,
                  descriptions of statutes, licenses, rules or regulations, or
                  legal conclusions, are accurate and fair summaries of such
                  statements of law, descriptions of statutes, licenses, rules
                  or regulations, or legal conclusions;

                           (ix) To such counsel's knowledge, there are no
                  contracts or other documents which are required to be
                  described in the Prospectus or filed as exhibits to the
                  Registration Statement by the Securities Act or by the Rules
                  and Regulations which have not been so described or filed;

                           (x) This Agreement has been duly authorized, executed
                  and delivered by the Company;

                                       19
<PAGE>

                           (xi) The issue and sale of the shares of Stock being
                  delivered on such Delivery Date by the Company and the
                  compliance by the Company with the provisions of this
                  Agreement and the consummation by the Company of the
                  transactions contemplated hereby and by the Recapitalization,
                  do not and will not conflict with or result in a breach or
                  violation of any of the terms or provisions of, or constitute
                  a default (or an event which with notice, lapse of time, or
                  both would constitute a default) under, any indenture,
                  mortgage, deed of trust, loan agreement or other agreement or
                  instrument known to such counsel to which the Company or any
                  of its subsidiaries is a party, by which the Company or any of
                  its subsidiaries is bound or to which any of the property or
                  assets of the Company or any of its subsidiaries is subject,
                  nor will such actions result in any violation of the
                  provisions of the charter or by-laws of the Company or any of
                  its subsidiaries presently in effect or of any statute, order,
                  rule or regulation known to such counsel of any court or
                  governmental agency or body having jurisdiction over the
                  Company or any of its subsidiaries or any of their properties
                  or assets; and, except for the registration of the offer and
                  sale of the Stock under the Securities Act and such consents,
                  approvals, authorizations, registrations or qualifications as
                  may be required under the Exchange Act and under applicable
                  state or foreign securities laws in connection with the
                  purchase and distribution of the Stock by the Underwriters, no
                  consent, approval, authorization or order of, or filing or
                  registration with, any such court or governmental agency or
                  body is required for the execution, delivery and performance
                  by the Company of this Agreement or the consummation of the
                  transactions contemplated hereby and by the Recapitalization;

                           (xii) Except as described in the Prospectus, to such
                  counsel's knowledge, there are no contracts, agreements or
                  understandings between the Company and any person or entity
                  granting such person or entity the right to require the
                  Company to file a registration statement under the Securities
                  Act with respect to any securities of the Company owned or to
                  be owned by such person or entity or to require the Company to
                  include such securities in the securities registered pursuant
                  to the Registration Statement or in any securities being
                  registered pursuant to any other registration statement filed
                  by the Company under the Securities Act;

                           (xiii) That certain Amended and Restated Fuel Cell
                  Product Operating Agreement, dated March 9, 2000, by and among
                  ECO Fuel Cells, LLC, and the Company and HPEC has been duly
                  authorized, executed and delivered by the Company and HPEC and
                  constitutes a valid and binding obligation of each of the
                  Company and HPEC enforceable against the Company and HPEC in
                  accordance with its terms;

                           (xiv) The Stockholders' and Voting Agreement dated as
                  of April 5, 2000, among the Company, Lehman Brothers Inc.,
                  Norman


                                       20
<PAGE>

                  Rothstein, Cynthia Rothstein, Allan Rothstein, Steven
                  Rothstein, Tammy Rothstein, Carl Rothstein, Norman Rothstein,
                  Trustee for Jordan H. Rothstein 2000 Irrevocable Trust, Norman
                  Rothstein, as trustee for Nicole S. Rothstein 2000 Irrevocable
                  Trust, Frederick Entman, Elise Entman, Brian Entman, Scott
                  Entman, Gerald Entman, Trustee for Elise Entman, Dynamark
                  Corp. and the other signatories thereto has been duly
                  authorized, executed and delivered by the Company and
                  constitutes a valid and binding obligation of the Company
                  enforceable against it in accordance with its terms;

                           (xv) The Company is not and, after giving effect to
                  the offering and sale of the Stock and the application of the
                  net proceeds thereof as described in the Prospectus, will not
                  be, an "investment company" as defined in the Investment
                  Company Act of 1940, as amended.

                           (xvi) Each Selling Stockholder has full right, power
                  and authority to enter into this Agreement and the Custodian
                  Agreement and Power of Attorney (as defined in Section 12
                  hereof); the execution, delivery and performance of this
                  Agreement and the Custodian Agreement and Power of Attorney by
                  each Selling Stockholder and the consummation by each Selling
                  Stockholder of the transactions contemplated hereby does not
                  and will not conflict with or result in a breach or violation
                  of any of the terms or provisions of, or constitute a default
                  under, any statute or instrument known to such counsel to
                  which any Selling Stockholder is a party or by which any
                  Selling Stockholder is bound or to which any of the property
                  or assets of any Selling Stockholder is subject, nor will such
                  actions result in any violation of the provisions of the deed
                  of trust of any Selling Stockholder or any statute or any
                  order, rule or regulation known to such counsel of any court
                  or governmental agency or body having jurisdiction over any
                  Selling Stockholder or the property or assets of any Selling
                  Stockholder; and, except for the registration of the Option
                  Stock under the Securities Act and such consents, approvals,
                  authorizations, registrations or qualifications as may be
                  required under the Exchange Act and applicable state
                  securities laws in connection with the purchase and
                  distribution of the Option Stock by the Underwriters, no
                  consent, approval, authorization or order of, or filing or
                  registration with, any such court or governmental agency or
                  body is required for the execution, delivery and performance
                  of this Agreement and the Custodian Agreement and Power of
                  Attorney by any Selling Stockholder and the consummation by
                  any Selling Stockholder of the transactions contemplated
                  hereby;

                           (xvii) This Agreement has been duly authorized,
                  executed and delivered by or on behalf of each Selling
                  Stockholder;

                           (xviii) The Custodian Agreement and Power of Attorney
                  has been duly authorized by those Selling Stockholders that
                  are entities, and


                                       21
<PAGE>

                  executed and delivered by each Selling Stockholder and
                  constitutes a valid and binding agreement of each Selling
                  Stockholder, enforceable in accordance with its terms;

                           (xix) Assuming that the Underwriters acquire their
                  interests in the Option Stock to be sold pursuant to this
                  Agreement by the Selling Stockholders in good faith and
                  without notice of any adverse claims (within the meaning of
                  Section 8-102 of the New York Uniform Commercial Code), upon
                  delivery to the Underwriters of such Option Stock registered
                  in their names, the Underwriters will acquire such Option
                  Stock free and clear of all liens, encumbrances, equities or
                  claims.

         In rendering such opinion, such counsel may state that their opinion is
         limited to matters governed by the federal laws of the United States of
         America, the internal laws of the State of New York and the General
         Corporation Law of the State of Delaware. In addition, such counsel
         shall state that they have participated in meetings and conferences
         with officers and other representatives of the Company, representatives
         of the independent accountants of the Company, representatives of the
         Underwriters and representatives of counsel for the Underwriters, at
         which the contents of the Registration Statement and the Prospectus and
         related matters were discussed and, although such counsel need not pass
         upon, and need not assume any responsibility for, the accuracy,
         completeness or fairness of the statements contained in the
         Registration Statement or the Prospectus (except for those referred to
         in the opinions in subsection (viii) above) and has made no independent
         check or verification thereof, such counsel shall state that on the
         basis of the foregoing, no facts have come to such counsel's attention
         that has led them to believe that the Registration Statement, as of the
         Effective Date and on the date of such counsel's opinion, contained or
         contains an untrue statement of a material fact or omitted or omits to
         state any material fact required to be stated therein or necessary in
         order to make the statements therein not misleading or that the
         Prospectus, as of its date and on the date of such counsel's opinion
         hereof, contained or contains an untrue statement of a material fact or
         omitted or omits to state a material fact necessary in order to make
         the statements therein, in light of the circumstances under which they
         were made, not misleading, except that such counsel need express no
         opinion or belief with respect to the financial statements and other
         financial and statistical data included therein or excluded therefrom
         or (except as referred to in the opinions in subsection (ix) above) the
         exhibits to the Registration Statement.

                  (e) Lapointe Rosenstein, shall have furnished to the
         Representatives its written opinion as to certain matters of Canadian
         law (including certain matters referred to in the opinions of Company
         counsel set forth in Section 7(d)), addressed to the Underwriters and
         dated such Delivery Date, as to such matters as shall be specified by
         the Representatives.

                                       22
<PAGE>

                  (f) The Company additionally shall have requested and caused
         Salzman & Levy, intellectual property counsel for the Company, to have
         furnished to the Representatives their opinion, dated such Delivery
         Date and addressed to the Underwriters, to the effect that:

                           (i) the Company and its subsidiaries own, possess,
                  license or have on reasonable terms other rights to use, and
                  title to and interest in, all Intellectual Property necessary
                  to the Company, its business as currently conducted or as
                  described in the Prospectus;

                           (ii) there is no pending, or, to the knowledge of
                  such counsel, threatened, action, suit or proceeding or claim
                  by others challenging the Company's rights in or to any such
                  Intellectual Property, and such counsel is unaware of any
                  facts which would form a reasonable basis for the assertion of
                  any such claim;

                           (iii) there is no pending, or, to the knowledge of
                  such counsel, threatened, action, suit, proceeding or claim by
                  others challenging the validity or scope of any such
                  Intellectual Property, and such counsel is unaware of any
                  facts which could form a reasonable basis for the assertion of
                  any such claim;

                           (iv) there is no pending, or, to the knowledge of
                  such counsel, threatened, action, suit, proceeding or claim by
                  others that the Company infringes or otherwise violates any
                  patent, trademark, copyright, trade secret or other
                  proprietary rights of others, and such counsel is unaware of
                  any facts which would form a reasonable basis for the
                  assertion of any such claim;

                           (v) to the knowledge of such counsel, there is no
                  Intellectual Property that any competitors or other third
                  parties have developed which reasonably could be expected to
                  supersede or make obsolete any product or process of the
                  Company;

                           (vi) to the knowledge of such counsel, there is no
                  prior art that may render any U.S. patent held by the Company
                  invalid or any U.S. patent application held by the Company
                  unpatentable which has not been disclosed to the U.S. Patent
                  and Trademark Office; and

                           (vii) The statements contained in the Prospectus,
                  under the headings "Risk Factors--We may be unable to protect
                  our intellectual property rights and we may be liable for
                  infringing the intellectual property rights of others" and
                  "Business--Intellectual Property" insofar as such statements
                  refer to the statements of law, descriptions of statutes,
                  licenses, agreements, rules or regulations or legal
                  conclusions are accurate and fair


                                       23
<PAGE>

                  summaries of such statements of law, descriptions of statutes,
                  licenses, agreements, rules or regulations or legal
                  conclusions.

         In rendering such opinion, such counsel may rely (A) as to matters
         involving the application of laws of any jurisdiction, to the extent
         they deem proper and specified in such opinion, upon the opinion of
         other counsel of good standing whom they believe to be reliable and who
         are satisfactory to counsel for the Underwriters and (B) as to matters
         of fact, to the extent they deem proper, on certificates of responsible
         officers of the Company and public officials. References to the
         Prospectus in this Section 7(f) include any supplements thereto at the
         Delivery Date.

                  (g) The Representatives shall have received from Greenberg
         Traurig, LLP, counsel for the Underwriters, such opinion or opinions,
         dated such Delivery Date, with respect to the issuance and sale of the
         Stock, the Registration Statement, the Prospectus and other related
         matters as the Representatives may reasonably require, and the Company
         shall have furnished to such counsel true and complete copies of such
         documents and access to all Company records and management personnel as
         they reasonably may request for the purpose of enabling them to pass
         upon such matters.

                  (h) The Company shall have requested and caused
         PricewaterhouseCoopers LLP to furnish to the Representatives, on the
         date hereof and on each Delivery Date, letters dated, respectively, the
         date hereof and each Delivery Date, in form and substance satisfactory
         to the Representatives, confirming that they are independent
         accountants within the meaning of the Securities Act and the applicable
         Rules and Regulations, and stating in effect that:

                           (i) in their opinion the audited financial statements
                  included in the Registration Statement and the Prospectus and
                  reported on by them comply as to form in all material respects
                  with the applicable accounting requirements of the Securities
                  Act and the related Rules and Regulations;

                           (ii) on the basis of carrying out certain specified
                  procedures (but not an examination in accordance with U.S.
                  generally accepted auditing standards) which would not
                  necessarily reveal matters of significance with respect to the
                  comments set forth in such letter; a reading of the minutes of
                  the meetings of the stockholders, directors, audit and
                  compensation committees of the Company and its subsidiaries;
                  and inquiries of certain officials of the Company who have
                  responsibility for financial and accounting matters of the
                  Company and its subsidiaries as to transactions and events
                  subsequent to May 31, 2000, nothing came to their attention
                  which caused them to believe that:

                                    (1) with respect to the period subsequent to
                           May 31, 2000 there were any changes, at a specified
                           date not more than five days prior to the date of the
                           letter in the long-term debt of the



                                       24
<PAGE>

                           Company and its subsidiaries, stockholders' equity of
                           the Company or in the working capital of the Company
                           and its subsidiaries as compared with the amounts
                           shown on the May 31, 2000 consolidated balance sheet
                           included in the Registration Statement and the
                           Prospectus, or for the period from June 1, 2000 to
                           such specified date there were any changes, as
                           compared with the corresponding period in the
                           preceding quarter, or any decrease in revenues or any
                           increase in the total or per share amount of net loss
                           of the Company, except in all instances for changes,
                           set forth in such letter, in which case the letter
                           shall be accompanied by an explanation by the Company
                           as to the significance thereof unless said
                           explanation is not deemed necessary by the
                           Representatives; and

                                    (2) the information included in the
                           Registration Statement and Prospectus in response to
                           Regulation S-K, Item 301 (Selected Financial Data) is
                           not in conformity with the applicable disclosure
                           requirements of Regulation S-K;

                                   and

                           (iii) they have performed certain other specified
                  procedures as a result of which they determined that certain
                  information of an accounting, financial or statistical nature
                  (which is limited to accounting, financial or statistical
                  information derived from the general accounting records of the
                  Company and its subsidiaries) set forth in the Registration
                  Statement and the Prospectus, including the information set
                  forth under the captions "Management's Discussion and Analysis
                  of Financial Condition and Results of Operations", "Selected
                  Financial Data, "Prospectus Summary --- Summary Financial
                  Data", "Capitalization", "Dilution", "Business" and "Risk
                  Factors" in the Prospectus, agrees with the accounting records
                  of the Company and its subsidiaries, excluding any questions
                  of legal interpretation.

                  (i) With respect to the letter of PricewaterhouseCoopers LLP
         referred to in the preceding paragraph and delivered to the
         Representatives concurrently with the execution of this Agreement (the
         "initial letter"), the Company shall have furnished to the
         Representatives a letter (the "bring-down letter") of such accountants,
         addressed to the Underwriters and dated such Delivery Date (i)
         confirming that they are independent public accountants within the
         meaning of the Securities Act and are in compliance with the applicable
         requirements relating to the qualification of accountants under Rule
         2-01 of Regulation S-X of the Commission, (ii) stating, as of the date
         of the bring-down letter (or, with respect to matters involving changes
         or developments since the respective dates as of which specified
         financial information is given in the Prospectus, as of a date not more
         than five days prior to the date of the bring-down letter), the
         conclusions and


                                       25
<PAGE>

         findings of such firm with respect to the financial information and
         other matters covered by the initial letter and (iii) confirming in all
         material respects the conclusions and findings set forth in the initial
         letter.

                  (j) The Company shall have furnished to the Representatives a
         certificate, dated such Delivery Date, of its Chairman of the Board,
         its President or a Vice President and its Chief Financial Officer
         stating that:

                           (i) The representations, warranties and agreements of
                  the Company in Section 1 are true and correct as of such
                  Delivery Date; the Company has complied with all its
                  agreements contained herein; and the conditions set forth in
                  Sections 7(a) through 7(p) have been fulfilled; and

                           (ii) They have carefully examined the Registration
                  Statement and the Prospectus and, in their judgment (A) as of
                  the Effective Date, the Registration Statement and Prospectus
                  did not include any untrue statement of a material fact and
                  did not omit to state a material fact required to be stated
                  therein or necessary to make the statements therein not
                  misleading, and (B) since the Effective Date no event has
                  occurred which should have been set forth in a supplement or
                  amendment to the Registration Statement or the Prospectus.

                  (k) (i) Neither the Company nor any of its subsidiaries shall
         have sustained since the date of the latest audited financial
         statements included in the Prospectus any loss or interference with its
         business from fire, explosion, flood or other calamity, whether or not
         covered by insurance, or from any labor dispute or court or
         governmental action, order or decree, otherwise than as set forth or
         contemplated in the Prospectus or (ii) since such date there shall not
         have been any change in the capital stock or long-term debt of the
         Company or any of its subsidiaries or any change, or any development
         involving a prospective change, in or affecting the general affairs,
         management, financial condition, stockholders' equity cash flows,
         prospects or results of operations of the Company and its subsidiaries,
         otherwise than as set forth or contemplated in the Prospectus, the
         effect of which, in any such case described in clause (i) or (ii), is,
         in the judgment of the Representatives, so material and adverse as to
         make it impracticable or inadvisable to proceed with the public
         offering or the delivery of the Stock being delivered on such Delivery
         Date on the terms and in the manner contemplated in the Prospectus.

                  (l) Subsequent to the execution and delivery of this Agreement
         there shall not have occurred any of the following: (i) trading in
         securities generally on the New York Stock Exchange, Inc. or the
         American Stock Exchange or in the over-the-counter market, or trading
         in any securities of the Company on any exchange or in the
         over-the-counter market, shall have been suspended or minimum prices
         shall have been established on any such exchange or such market by the
         Commission, by such exchange or by any other regulatory body or


                                       26
<PAGE>

         governmental authority having jurisdiction, (ii) a banking moratorium
         shall have been declared by federal or state authorities, (iii) the
         United States shall have become engaged in hostilities, there shall
         have been an escalation in hostilities involving the United States or
         there shall have been a declaration of a national emergency or war by
         the United States or (iv) there shall have occurred such a material
         adverse change in general economic, political or financial conditions
         (or the effect of international conditions on the financial markets in
         the United States shall be such) as to make it, in the judgment of a
         majority-in-interest of the several Underwriters, impracticable or
         inadvisable to proceed with the public offering or delivery of the
         Stock being delivered on such Delivery Date on the terms and in the
         manner described in the Prospectus.

                  (m) Prior to the Closing Date, the Company and the Selling
         Stockholders shall have furnished to the Representatives such further
         information, certificates and documents as the Representatives
         reasonably may request.

                  (n) The Common Stock shall have been approved for quotation on
         the Nasdaq National Market under the symbol "HPOW", subject to official
         notice of issuance and evidence of satisfactory distribution.

                  (o) At the Effective Date, the Company shall have furnished to
         the Representatives a letter substantially in the form of Exhibit A
         hereto from each officer and director of the Company and each of Norman
         Rothstein, Cynthia Rothstein, Allan Rothstein, Steven Rothstein, Tammy
         Rothstein, Carl Rothstein, Norman Rothstein, Trustee for Jordan H.
         Rothstein 2000 Irrevocable Trust, Norman Rothstein, as trustee for
         Nicole S. Rothstein 2000 Irrevocable Trust, Frederick Entman, Elise
         Entman, Brian Entman, Scott Entman, Gerald Entman, Trustee for Elise
         Entman, Dynamark Corp., Duquesne Enterprises, Singapore Technologies
         Automotive Ltd., Sofinov Societe Financiere D'Innovation Inc., ECO Fuel
         Cells, LLC and Hydro-Quebec CapiTech Inc.

                  (p) As described in the Prospectus, on or prior to the Closing
         Date, all outstanding shares of the Company's Series A Convertible
         Preferred Stock, $.001 par value, Series B Convertible Preferred Stock,
         $.001 par value, and Series C Convertible Preferred Stock, $.001 par
         value, shall have been duly and validly converted into the number of
         shares of Common Stock described in the Prospectus and no such shares
         of preferred stock shall remain issued or outstanding.

                  (q) Each Selling Stockholder (or the Custodian or one or more
         attorneys-in-fact on behalf of the Selling Stockholders) shall have
         furnished to the Representatives on each Delivery Date a certificate,
         signed by, or on behalf of, the Selling Stockholder (or the Custodian
         or one or more attorneys-in-fact) stating that the representations,
         warranties and agreements of the Selling Stockholder contained herein
         are true and correct and that the Selling Stockholder has


                                       27
<PAGE>

         complied with all agreements contained herein to be performed by the
         Selling Stockholder at or prior to the such Delivery Date.

         All opinions, letters, evidence and certificates mentioned above or
elsewhere in this Agreement shall be deemed to be in compliance with the
provisions hereof only if they are in form and substance reasonably satisfactory
to counsel for the Underwriters.

         8.       INDEMNIFICATION AND CONTRIBUTION.

                 (a) The Company shall indemnify and hold harmless each
         Underwriter, its officers, directors, affiliates, representatives,
         employees and each person, if any, who controls any Underwriter within
         the meaning of Section 15 of the Securities Act and Section 20 of the
         Exchange Act, from and against all losses, claims, damages and
         liabilities joint or several ("Losses"), and all actions and
         proceedings in respect thereof (including, but not limited to, Losses
         relating to purchases and sales of Stock), to which that Underwriter,
         officer, director, affiliate, representative, employee or controlling
         person may become subject, under the Securities Act or otherwise,
         insofar as any such Loss, action or proceeding arises out of, or is
         based upon, (i) any untrue statement or alleged untrue statement of a
         material fact contained (A) in any Preliminary Prospectus, the
         Registration Statement or the Prospectus or in any amendment thereof or
         supplement thereto, or (B) in any materials or information provided to
         investors by, or with the approval of, the Company in connection with
         the marketing of the offering of the Stock ("Marketing Materials"),
         including any roadshow or investor presentations made to investors by
         the Company (whether in person or electronically),(ii) the omission or
         alleged omission to state in any Preliminary Prospectus, the
         Registration Statement or the Prospectus, or in any amendment or
         supplement thereto, or in any Marketing Materials, any material fact
         required to be stated therein or necessary to make the statements
         therein (in the case of the Prospectus, in light of the circumstances
         under which they were made), not misleading or (iii) any act or failure
         to act or any alleged act or failure to act by any Underwriter in
         connection with, or relating in any manner to, the Stock or the
         offering contemplated hereby, and which is included as part of or
         referred to in any Loss, action or proceeding arising out of or based
         upon matters covered by clause (i) or (ii) above (provided that the
         Company shall not be liable under this clause (iii) to the extent that
         it is determined in a final judgment by a court of competent
         jurisdiction that such Loss, action or proceeding resulted directly
         from any such acts or failures to act undertaken or omitted to be taken
         by such Underwriter through its gross negligence or willful
         misconduct), and shall reimburse each Underwriter and each such
         officer, employee, director, affiliate, representative or controlling
         person promptly upon demand for any legal or other expenses reasonably
         incurred by that Underwriter, officer, director, affiliate,
         representative, employee or controlling person in connection with
         investigating or defending or preparing to defend against any such
         Loss, action or proceeding as such expenses are incurred; PROVIDED,
         HOWEVER, that the Company shall not be liable in any such case to the
         extent that any such Loss, action or proceeding arises out of, or is
         based upon, any untrue statement or alleged untrue statement or
         omission or alleged omission made in any Preliminary Prospectus, the
         Registration Statement or the Prospectus, or in any such amendment or
         supplement, or in any Blue Sky Application, in reliance upon and in
         conformity with written information concerning such Underwriter
         furnished to the Company through the Representatives by or on behalf of
         any Underwriter specifically for inclusion therein which information
         consists solely of the information specified in Section 8(f).

                                       28
<PAGE>

         The foregoing indemnity agreement is in addition to any liability which
         the Company may otherwise have to any Underwriter or to any officer,
         director, affiliate, representative employee or controlling person of
         that Underwriter

                  (b) The Selling Stockholders, severally in proportion to the
         number of shares of Option Stock to be sold by each of them hereunder,
         shall indemnify and hold harmless each Underwriter, its officers,
         directors, affiliates or representatives and employees, and each
         person, if any, who controls any Underwriter within the meaning of the
         Section 15 of Securities Act and Section 20 of the Exchange Act, from
         and against Losses, and all actions and proceedings in respect thereof
         (including, but not limited to, Losses relating to purchases and sales
         of Option Stock), to which that Underwriter, officer, director,
         affiliate, representative, employee or controlling person may become
         subject, under the Securities Act or otherwise, insofar as such Loss,
         action or proceeding arises out of, or is based upon, (i) any breach of
         any representation, warranty, covenant or agreement made by the Selling
         Stockholders in this Agreement, (ii) any untrue statement or alleged
         untrue statement of a material fact contained in the information
         furnished in writing by or on behalf of the Selling Stockholders
         expressly for use in the Registration Statement and the Prospectus and
         any further amendments or supplements thereto (including any
         information relating to the Selling Stockholder, under the caption
         "Principal and Selling Stockholders" contained in the Registration
         Statement and Prospectus (or any amendment or supplement thereto)), or
         (iii) the omission or alleged omission to state in any Preliminary
         Prospectus, Registration Statement or the Prospectus, or in any
         amendment or supplement thereto, any material fact, relating to the
         Selling Stockholders, required to be stated therein or necessary to
         make the statements therein (in the case of the Prospectus, in light of
         the circumstances under which they were made) not misleading, and shall
         reimburse each Underwriter, its officers and employees, directors,
         affiliates, representatives and each such controlling person for any
         legal or other expenses reasonably incurred by that Underwriter, its
         officers, directors, affiliates, representatives and employees or
         controlling persons in connection with investigating or defending or
         preparing to defend against any such Loss, action or proceeding as such
         expenses are incurred; PROVIDED, HOWEVER, that the Selling Stockholders
         shall not be liable in any such case to the extent that any such Loss,
         action or proceeding arises out of, or is based upon, any untrue
         statement or alleged untrue statement or omission or alleged omission
         made in any Preliminary Prospectus, the Registration Statement or the
         Prospectus or in any such amendment or supplement in reliance upon and
         in conformity with written information concerning such Underwriter
         furnished to the Company through the Representatives by or on behalf of
         any Underwriter specifically for inclusion therein which information
         consists solely of the information specified in Section 8(f). The
         foregoing indemnity agreement is in addition to any liability which the
         Selling Stockholders may otherwise have to any Underwriter or any
         officer, director, affiliate, representative, employee or controlling
         person of that Underwriter. Notwithstanding anything to the contrary
         herein, in no event shall any Selling Stockholder's obligation under
         this Section exceed the total net proceeds from the offering received
         by such Selling Stockholder (computed without deduction for any taxes
         on such amount.)

                  (c) Each Underwriter, severally and not jointly, shall
         indemnify and hold harmless the Company, its officers, affiliates,
         representatives and employees, each of its directors (including any
         person who, with his or her consent, is named in the Registration
         Statement as about to become a director of the Company), each person,
         if any, who controls the Company within the meaning of Section 15 of
         the Securities Act and Section 20 of the Exchange Act, and each of the
         Selling Stockholders from and against any Loss, or any action or
         proceeding in


                                       29
<PAGE>

         respect thereof, to which the Company or any such director, officer,
         affiliate, representative, employee, controlling person or Selling
         Stockholder may become subject, under the Securities Act or otherwise,
         insofar as such Loss, action or proceeding arises out of, or is based
         upon, (i) any untrue statement or alleged untrue statement of a
         material fact contained (A) in any Preliminary Prospectus, the
         Registration Statement or the Prospectus or in any amendment thereof or
         supplement thereto, or (B) in any Blue Sky Application or (ii) the
         omission or alleged omission to state in any Preliminary Prospectus,
         the Registration Statement or the Prospectus, or in any amendment
         thereof or supplement thereto, or in any Blue Sky Application any
         material fact required to be stated therein or necessary to make the
         statements therein not misleading, but in each case only to the extent
         that the untrue statement or alleged untrue statement or omission or
         alleged omission was made in reliance upon and in conformity with
         written information concerning such Underwriter furnished to the
         Company through the Representatives by or on behalf of that Underwriter
         specifically for inclusion therein, and shall reimburse the Company and
         any such director, officer, affiliate, representative, employee,
         controlling person or Selling Stockholder for any legal or other
         expenses reasonably incurred by the Company or any such director,
         officer, affiliate, representative, employee, controlling person or
         Selling Stockholder in connection with investigating or defending or
         preparing to defend against any such Loss, action or proceeding as such
         expenses are incurred. The foregoing indemnity agreement is in addition
         to any liability which any Underwriter may otherwise have to the
         Company or any such director, officer, employee, affiliate,
         representative, controlling person or Selling Stockholder.

                  (d) Promptly after receipt by an indemnified party under this
         Section 8 of notice of any claim or the commencement of any action or
         proceeding, the indemnified party shall, if a claim in respect thereof
         is to be made against the indemnifying party under this Section 8,
         notify the indemnifying party in writing of the claim or the
         commencement of that action or proceeding; PROVIDED, HOWEVER, that the
         failure to notify the indemnifying party shall not relieve it from any
         liability which it may have under this Section 8 except to the extent
         it has been materially prejudiced by such failure. If any such claim,
         action or proceeding shall be brought against an indemnified party, and
         it shall notify the indemnifying party thereof, the indemnifying party
         shall be entitled to participate therein and, to the extent that it
         wishes, jointly with any other similarly notified indemnifying party,
         to assume the defense thereof with counsel reasonably satisfactory to
         the indemnified party. After notice from the indemnifying party to the
         indemnified party of its election to assume the defense of such claim,
         action or proceeding, the indemnifying party shall not be liable to the
         indemnified party under this Section 8 for any legal or other expenses
         subsequently incurred by the indemnified party in connection with the
         defense thereof other than reasonable costs of investigation; PROVIDED,
         HOWEVER, that the Representatives shall have the right to employ
         counsel to represent jointly the Representatives and those other
         Underwriters and their respective officers, employees, directors,
         affiliates, representatives and controlling persons who may be subject
         to liability arising out of any claim in respect of which indemnity may
         be sought by the Underwriters against the Company under this Section 8
         if, in the reasonable judgment of the Representatives, it is advisable
         for the Representatives and those Underwriters, officers, employees,
         directors, affiliates, representatives and controlling persons to be
         jointly represented by separate counsel, and in that event the
         reasonable fees and expenses of such separate counsel shall be paid by
         the Company. No indemnifying party shall (i) without the prior written
         consent of the indemnified parties (which consent shall not be
         unreasonably


                                       30
<PAGE>

         withheld), settle or compromise or consent to the entry of any judgment
         with respect to any pending or threatened claim, action, suit or
         proceeding in respect of which indemnification or contribution may be
         sought hereunder (whether or not the indemnified parties are actual or
         potential parties to such claim or action) unless such settlement,
         compromise or consent includes an unconditional release of each
         indemnified party from all liability arising out of such claim, action,
         suit or proceeding, or (ii) be liable for any settlement of any such
         action or proceeding effected without its written consent (which
         consent shall not be unreasonably withheld), but if settled with the
         consent of the indemnifying party or if there be a final judgment of
         the plaintiff in any such action, the indemnifying party agrees to
         indemnify and hold harmless any indemnified party from and against any
         loss or liability by reason of such settlement or judgment.

                  (e) If the indemnification provided for in this Section 8
         shall for any reason be unavailable to or insufficient to hold harmless
         an indemnified party under Section 8(a), 8(b), 8(c) or 8(g) in respect
         of any Loss, action or proceeding in respect thereof, referred to
         therein, then each indemnifying party shall, in lieu of indemnifying
         such indemnified party, contribute to the amount paid or payable by
         such indemnified party as a result of such Loss, action or proceeding
         in respect thereof, (i) in such proportion as shall be appropriate to
         reflect the relative benefits received by the Company or Selling
         Stockholders, on the one hand and the Underwriters on the other from
         the offering of the Stock or (ii) if the allocation provided by clause
         (i) above is not permitted by applicable law, in such proportion as is
         appropriate to reflect not only the relative benefits referred to in
         clause (i) above but also the relative fault of the Company or Selling
         Stockholders, on the one hand and the Underwriters on the other with
         respect to the statements or omissions which resulted in such Loss,
         action or proceeding in respect thereof, as well as any other relevant
         equitable considerations. The relative benefits received by the Company
         or Selling Stockholders, on the one hand and the Underwriters on the
         other with respect to such offering shall be deemed to be in the same
         proportion as the total net proceeds from the offering of the Stock
         purchased under this Agreement (before deducting expenses) received by
         the Company or Selling Stockholders, on the one hand, and the total
         underwriting discounts and commissions received by the Underwriters
         with respect to the shares of the Stock purchased under this Agreement,
         on the other hand, bear to the total gross proceeds from the offering
         of the shares of the Stock under this Agreement, in each case as set
         forth in the table on the cover page of the Prospectus. The relative
         fault shall be determined by reference to whether the untrue or alleged
         untrue statement of a material fact or omission or alleged omission to
         state a material fact relates to information supplied by the Company,
         the Selling Stockholders or the Underwriters, the intent of the parties
         and their relative knowledge, access to information and opportunity to
         correct or prevent such statement or omission. The Company, the Selling
         Stockholders and the Underwriters agree that it would not be just and
         equitable if contributions pursuant to this Section were to be
         determined by pro rata allocation (even if the Underwriters were
         treated as one entity for such purpose) or by any other method of
         allocation which does not take into account the equitable
         considerations referred to herein. The amount paid or payable by an
         indemnified party as a result of the Loss, action or proceeding in
         respect thereof, referred to above in this Section shall be deemed to
         include, for purposes of this Section 8(e), any legal or other expenses
         reasonably incurred by such indemnified party in connection with
         investigating or defending any such action, proceeding or claim.
         Notwithstanding the provisions of this Section 8(e), no Underwriter
         shall be required to contribute any amount in excess of the amount by
         which


                                       31
<PAGE>

         the total price at which the Stock underwritten by it and distributed
         to the public was offered to the public exceeds the amount of any
         damages which such Underwriter has otherwise paid or become liable to
         pay by reason of any untrue or alleged untrue statement or omission or
         alleged omission. No person guilty of fraudulent misrepresentation
         (within the meaning of Section 11(f) of the Securities Act) shall be
         entitled to contribution from any person who was not guilty of such
         fraudulent misrepresentation. The Underwriters' obligations to
         contribute as provided in this Section 8(e) are several in proportion
         to their respective underwriting obligations and not joint.

                  (f) The Underwriters severally confirm and the Company
         acknowledges that the statements with respect to the public offering of
         the Stock by the Underwriters set forth on the cover page of, the
         legend concerning over-allotments on the cover page of and the
         concession and reallowance figures appearing under the caption
         "Underwriting" in, the Prospectus are correct and constitute the only
         information concerning such Underwriters furnished in writing to the
         Company by or on behalf of the Underwriters specifically for inclusion
         in the Registration Statement and the Prospectus.

                  (g) The Company agrees to indemnify and hold harmless Lehman
         Brothers Inc., the directors, officers, employees, affiliates,
         representative and agents of Lehman Brothers Inc. and each person, who
         controls Lehman Brothers Inc. within the meaning of either Section 15
         of the Securities Act or Section 20 of the Exchange Act, from and
         against any and all Losses, actions or proceedings in respect thereof,
         to which they may become subject under the Securities Act, the Exchange
         Act or other federal or state statutory law or regulation, at common
         law or otherwise (including, without limitation, any legal or other
         expenses reasonably incurred in connection with defending or
         investigating any such action or claim), insofar as such Losses (or
         actions or proceedings in respect thereof) (i) arise out of or are
         based upon any untrue statement or alleged untrue statement of a
         material fact contained in the Registration Statement, the Prospectus
         or any Preliminary Prospectus or in any amendment thereof or supplement
         thereto, or arise out of or are based upon the omission or alleged
         omission to state therein a material fact required to be stated therein
         or necessary to make the statement therein, when considered in
         conjunction with the Registration Statement, the Prospectus, any
         Preliminary Prospectus or in any amendment thereof or supplement
         thereto, not misleading; (ii) caused by the failure of any person
         participating in the Directed Share Program to pay for and accept
         delivery of the securities which immediately following the Effective
         Date of the Registration Statement, were subject to a properly
         confirmed agreement to purchase; or (iii) related to, arising out of,
         or in connection with the Directed Share Program, provided that, the
         Company will not be liable in any such case to the extent that any such
         Loss arises out of or is based upon any such untrue statement or
         alleged untrue statement or omission or alleged omission made therein
         in reliance upon and in conformity with written information furnished
         to the Company by or on behalf of Lehman Brothers Inc. specifically for
         inclusion therein, which information consists solely of the information
         specified in Section 8(f), or is finally judicially determined by a
         court of competent jurisdiction to have resulted directly from the bad
         faith or gross negligence of Lehman Brothers Inc.

                                       32
<PAGE>

         9.       DEFAULTING UNDERWRITERS. If, on either Delivery Date, any
Underwriter defaults in the performance of its obligations under this
Agreement, the remaining non-defaulting Underwriters shall be obligated to
purchase the Stock which the defaulting Underwriter agreed but failed to
purchase on such Delivery Date in the respective proportions which the number
of shares of the Firm Stock set opposite the name of each remaining
non-defaulting Underwriter in Schedule 1 hereto bears to the total number of
shares of the Firm Stock set opposite the names of all the remaining
non-defaulting Underwriters in Schedule 1 hereto; PROVIDED, HOWEVER, that the
remaining non-defaulting Underwriters shall not be obligated to purchase any
of the Stock on such Delivery Date if the total number of shares of the Stock
which the defaulting Underwriter or Underwriters agreed but failed to
purchase on such date exceeds 9.09% of the total number of shares of the
Stock to be purchased on such Delivery Date, and any remaining non-defaulting
Underwriter shall not be obligated to purchase more than 110% of the number
of shares of the Stock which it agreed to purchase on such Delivery Date
pursuant to the terms of Section 2. If the foregoing maximums are exceeded,
the remaining non-defaulting Underwriters, or those other underwriters
satisfactory to the Representatives who so agree, shall have the right, but
shall not be obligated, to purchase, in such proportion as may be agreed upon
among them, all the Stock to be purchased on such Delivery Date. If the
remaining Underwriters or other underwriters satisfactory to the
Representatives do not elect to purchase the shares which the defaulting
Underwriter or Underwriters agreed but failed to purchase on such Delivery
Date, this Agreement (or, with respect to the Second Delivery Date, the
obligation of the Underwriters to purchase, and of the Selling Stockholders
to sell, the Option Stock) shall terminate without liability on the part of
any non-defaulting Underwriter or the Company or the Selling Stockholders,
except that the Company will continue to be liable for the payment of
expenses to the extent set forth in Sections 6 and 11. As used in this
Agreement, the term "Underwriter" includes, for all purposes of this
Agreement unless the context requires otherwise, any party not listed in
Schedule 1 hereto who, pursuant to this Section 9, purchases Stock which a
defaulting Underwriter agreed but failed to purchase.

         Nothing contained herein shall relieve a defaulting Underwriter of any
liability it may have to the Company for damages caused by its default. If other
Underwriters are obligated or agree to purchase the Stock of a defaulting or
withdrawing Underwriter, either the Representatives or the Company may postpone
the Delivery Date for up to seven full business days in order to effect any
changes that in the opinion of counsel for the Company or counsel for the
Underwriters may be necessary in the Registration Statement, the Prospectus or
in any other document.

         10.      TERMINATION. The obligations of the Underwriters hereunder may
be terminated by the Representatives by notice given to and received by the
Company prior to delivery of and payment for the Firm Stock if, prior to that
time, any of the events described in Sections 7(k) or 7(l), shall have occurred
or if the Underwriters shall decline to purchase the Stock for any reason
permitted under this Agreement.

         11.      REIMBURSEMENT OF UNDERWRITERS' EXPENSES. If the Company or any
Selling Stockholder shall fail to tender the Stock for delivery to the
Underwriters by reason of any


                                       33
<PAGE>

failure, refusal or inability on the part of the Company or such Selling
Stockholder to perform any agreement on its part to be performed, or because any
other condition of the Underwriters' obligations hereunder required to be
fulfilled by the Company or the Selling Stockholders is not fulfilled, the
Company and the Selling Stockholders will reimburse the Underwriters for all
reasonable out-of-pocket expenses (including fees and disbursements of counsel)
incurred by the Underwriters in connection with this Agreement and the proposed
purchase of the Stock, and upon demand the Company and the Selling Stockholders
shall pay the full amount thereof to the Representative(s). If this Agreement is
terminated pursuant to Section 9 by reason of the default of one or more
Underwriters, neither the Company nor any Selling Stockholder shall be obligated
to reimburse any defaulting Underwriter on account of those expenses.

         12.      Each Selling Stockholder severally and not jointly represents,
warrants and agrees that:

                  (a) The Selling Stockholder has, and immediately prior to the
         First Delivery Date (as defined in Section 4 hereof) the Selling
         Stockholder will have, good and valid title to the shares of Option
         Stock to be sold by the Selling Stockholder hereunder on such date,
         free and clear of all liens, encumbrances, equities or claims; and upon
         delivery of the Option Stock and payment therefor pursuant hereto, good
         and valid title to such shares, free and clear of all liens,
         encumbrances, equities or claims, will pass to the several
         Underwriters.

                  (b) The Selling Stockholder has placed in custody and duly and
         irrevocably executed and delivered a power of attorney under a
         Custodian Agreement and Power of Attorney (the "Custody Agreement" and,
         together with all other similar agreements executed by the other
         Selling Stockholders, the "Custody Agreements") with
         __________________________, as custodian (the "Custodian"), for
         delivery under this Agreement, certificates in negotiable form (with
         signature guaranteed by a commercial bank or trust company having an
         office or correspondent in the United States or a member firm of the
         New York or American Stock Exchanges) representing the shares of Stock
         to be sold by the Selling Stockholder hereunder.

                  (c) Pursuant to the Custody Agreement, the Selling Stockholder
         has duly and irrevocably executed and delivered a power of attorney
         appointing the Custodian and one or more other persons, as
         attorneys-in-fact, with full power of substitution, and with full
         authority (exercisable by any one or more of them) to execute and
         deliver this Agreement and to take such other action as may be
         necessary or desirable to carry out the provisions hereof on behalf of
         the Selling Stockholder.

                  (d) The Selling Stockholder has full right, power and
         authority to enter into this Agreement and the Custody Agreement; the
         execution, delivery and performance of this Agreement and the Custody
         Agreement by the Selling Stockholder and the consummation by the
         Selling Stockholder of the transactions contemplated hereby will not
         conflict with or result in a breach or violation of any


                                       34
<PAGE>

         of the terms or provisions of, or constitute a default under, any
         indenture, mortgage, deed of trust, loan agreement or other agreement
         or instrument to which the Selling Stockholder is a party or by which
         the Selling Stockholder is bound or to which any of the property or
         assets of the Selling Stockholder is subject, nor will such actions
         result in any violation of the deed of trust of the Selling Stockholder
         or any statute or any order, rule or regulation of any court or
         governmental agency or body having jurisdiction over the Selling
         Stockholder or the property or assets of the Selling Stockholder; and,
         except for the registration of the Option Stock under the Securities
         Act and such consents, approvals, authorizations, registrations or
         qualifications as may be required under the Exchange Act and applicable
         state or foreign securities laws in connection with the purchase and
         distribution of the Option Stock by the Underwriters, no consent,
         approval, authorization or order of, or filing or registration with,
         any such court or governmental agency or body is required for the
         execution, delivery and performance of this Agreement and the Custody
         Agreement by the Selling Stockholder and the consummation by the
         Selling Stockholder of the transactions contemplated hereby.

                  (e) The information furnished in writing by or on behalf of
         the Selling Stockholder expressly for use in the Registration
         Statement, the Preliminary Prospectus and the Prospectus and any
         further amendments or supplements thereto and any information relating
         to the Selling Stockholder, under the caption "Principal and Selling
         Stockholders" contained in the Registration Statement, Preliminary
         Prospectus and Prospectus, when they become effective or are filed with
         the Commission, as the case may be, do not and will not, as of the
         applicable effective date (as to the Registration Statement,
         Preliminary Prospectus and any amendment thereto) and as of the
         applicable filing date (as to the Prospectus and any amendment or
         supplement thereto) contain an untrue statement of a material fact or
         omit to state a material fact required to be stated therein or
         necessary to make the statements therein not misleading.

                  (f) The Selling Stockholder has no reason to believe that the
         representations and warranties of the Company contained in Section 1
         hereof are not true and correct in all material respects.

                  (g) The Selling Stockholder has not taken and will not take,
         directly or indirectly, any action which is designed to or which has
         constituted or which might reasonably be expected to cause or result in
         the stabilization or manipulation of the price of any security of the
         Company to facilitate the sale or resale of the shares of the Stock.

         13.      Each Selling Stockholder agrees:

                  (a) That the Option Stock to be sold by the Selling
         Stockholder hereunder which is represented by the certificates held in
         custody for the Selling Stockholder is subject to the interest of the
         Underwriters, that the arrangements


                                       35
<PAGE>

         made by the Selling Stockholder for such custody are irrevocable, and
         that the obligations of the Selling Stockholder hereunder shall not be
         terminated by any act of the Selling Stockholder, by operation of law
         by the death or incapacity of any individual Selling Stockholder or, in
         the case of a trust, by the death or incapacity of any executor or
         trustee or the termination of such trust, or the occurrence of any
         other event.

                  (b) To deliver to the Representatives prior to the First
         Delivery Date a properly completed and executed United States Treasury
         Department Form W-9.

         14.      NOTICES, ETC. All statements, requests, notices and agreements
hereunder shall be in writing, and:

                  (a) if to the Underwriters, shall be delivered or sent by
         mail, telex or facsimile transmission to Lehman Brothers Inc., Three
         World Financial Center, New York, New York 10285, Attention: Syndicate
         Department (Fax: 212-526-6588), with a copy, in the case of any notice
         pursuant to Section 8(c), to the Director of Litigation, Office of the
         General Counsel, Lehman Brothers Inc., 3 World Financial Center, 10th
         Floor, New York, NY 10285; with a copy (which shall not constitute
         effective notice pursuant to this Section 14) to Greenberg Traurig,
         LLP, The Met Life Building, 200 Park Avenue, New York, NY 10166, Attn:
         Clifford E. Neimeth, Esq.;

                  (b) if to the Company, shall be delivered or sent by mail,
         telex or facsimile transmission to the address of the Company set forth
         in the Registration Statement, Attention: William Zang (Fax:
         973-249-5448); with a copy (which shall not constitute effective notice
         pursuant to this Section 14) to Fulbright & Jaworski L.L.P., 666 Fifth
         Avenue, New York, NY 10103, Attn: Merrill Kraines, Esq.;

                  (c) if to any Selling Stockholder, shall be delivered or sent
         by mail, telex or facsimile transmission to such Selling Stockholder at
         the address set forth on Schedule 2 hereto;

PROVIDED, HOWEVER, that any notice to an Underwriter pursuant to Section 8(d)
shall be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its address set forth in its acceptance telex to the
Representatives, which address will be supplied to any other party hereto by the
Representatives upon request. Any such statements, requests, notices or
agreements shall take effect at the time of receipt thereof. The Company shall
be entitled to act and rely upon any request, consent, notice or agreement given
or made on behalf of the Underwriters by Lehman Brothers Inc.

         15.      PERSONS ENTITLED TO BENEFIT OF AGREEMENT. This Agreement shall
inure to the benefit of and be binding upon the Underwriters, the Company, the
Selling Stockholders and their respective successors. This Agreement and the
terms and provisions hereof are for the sole benefit of only those persons,
except that (A) the representations, warranties, indemnities and


                                       36
<PAGE>

agreements of the Company contained in this Agreement shall also be deemed to be
for the benefit of the person or persons, if any, who control any Underwriter
within the meaning of Section 15 of the Securities Act and (B) the indemnity
agreement of the Underwriters contained in Section 8(c) of this Agreement shall
be deemed to be for the benefit of directors of the Company, officers of the
Company who have signed the Registration Statement, any person controlling the
Company within the meaning of Section 15 of the Securities Act and the Selling
Stockholders. Nothing in this Agreement is intended or shall be construed to
give any person, other than the persons referred to in this Section 15, any
legal or equitable right, remedy or claim under or in respect of this Agreement
or any provision contained herein.

         16.      SURVIVAL. The respective indemnities, representations,
warranties and agreements of the Company and the Underwriters contained in this
Agreement or made by or on behalf on them, respectively, pursuant to this
Agreement, shall survive the delivery of and payment for the Stock and shall
remain in full force and effect, regardless of any investigation made by or on
behalf of any of them or any person controlling any of them.

         17.      DEFINITION OF THE TERM "BUSINESS DAY". For purposes of this
Agreement, "business day" means any day on which the New York Stock Exchange,
Inc. is open for trading each Monday, Tuesday, Wednesday, Thursday or Friday
which is not a day on which banking institutions in New York are generally
authorized or obligated by law or executive order to close.

         18.      GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF NEW YORK, WITHOUT REGARD TO THE
CONFLICTS OF LAW PRINCIPLES OF SUCH STATE.

         19.      CONSENT TO JURISDICTION. Each party irrevocably agrees that
any legal suit, action or proceeding arising out of or based upon this Agreement
or the transactions contemplated hereby may be instituted in the federal courts
of the United States of America located in the City of New York or the courts of
the State of New York in each case located in the Borough of Manhattan in the
City of New York (collectively, the "Specified Courts"), and irrevocably submits
to the exclusive jurisdiction (except for proceedings instituted in regard to
the enforcement of a judgment of any such court, as to which such jurisdiction
is non-exclusive) of such courts in any such suit, action or proceeding. The
parties further agree that service of any process, summons, notice or document
by mail to such party's address set forth above shall be effective service of
process for any lawsuit, action or other proceeding brought in any such court.
The parties hereby irrevocably and unconditionally waive any objection to the
laying of venue of any lawsuit, action or other proceeding in the Specified
Courts, and hereby further irrevocably and unconditionally waive and agree not
to plead or claim in any such court that any such lawsuit, action or other
proceeding brought in any such court has been brought in an inconvenient forum.

         20.      COUNTERPARTS. This Agreement may be executed in one or more
counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.


                                       37
<PAGE>

         21.      HEADINGS. The headings herein are inserted for convenience of
reference only and are not intended to be part of, or to affect the meaning or
interpretation of, this Agreement.



                                       38
<PAGE>


         If the foregoing correctly sets forth the agreement between the Company
and the Underwriters, please indicate your acceptance in the space provided for
that purpose below.

                                       Very truly yours,

                                       H POWER CORP.

                                       By:______________________________________
                                          Name:
                                          Title:


                                       THE SELLING STOCKHOLDERS
                                         named in Schedule 2 to this Agreement

                                       By:______________________________________
                                          Attorney-in-Fact




                                       39
<PAGE>


LEHMAN BROTHERS INC.
CIBC WORLD MARKETS
DEUTSCHE BANK SECURITIES INC.
JOSEPHTHAL & CO. INC.
FIDELITY CAPITAL MARKETS,
a division of National Financial Services Corporation

For themselves and as Representatives
of the several Underwriters named
in Schedule 1 hereto

         By LEHMAN BROTHERS INC.

         By_____________________________
            AUTHORIZED REPRESENTATIVE





                                       40
<PAGE>


                                   SCHEDULE 1

                                                                 Number of
                                                                  Shares
                                                                 ----------
Underwriters
Lehman Brothers Inc. ..........................................................
CIBC World Markets.............................................................
Deutsche Bank Securities Inc. .................................................
Josephthal & Co. Inc. .........................................................
Fidelity Capital Markets,
     a division of National Financial
     Services Corporation......................................................
                                                                 ----------
         Total                                                    7,000,000
                                                                 ==========


                                       41
<PAGE>


                                   SCHEDULE 2

Name and Address of                                     Number of Shares
Selling Stockholder                                     of Option Stock
-------------------                                     -----------------
Cynthia Rothstein...................................         525,000
311 Links Drive West
West Oceanside, NY 11572

Gerald Entman, as Trustee for Elise Entman..........         225,000
2440 North Lakeview Avenue
Chicago, IL 60614

Scott Entman........................................         150,000
174 South Orange Avenue Apt 2
South Orange NJ 07079

Brian Entman........................................         150,000
                                                             -------
260 Tillou Road
South Orange NJ 07079

         Total......................................        1,050,000
                                                            =========





                                       42
<PAGE>


                                                                       EXHIBIT A

                            LOCK-UP LETTER AGREEMENT

LEHMAN BROTHERS INC.
CIBC WORLD MARKETS
DEUTSCHE BANK SECURITIES INC.
JOSEPHTHAL & CO. INC.
FIDELITY CAPITAL MARKETS
   a division of National Financial
   Services Corporation
As Representatives of the
  several underwriters
c/o LEHMAN BROTHERS INC.
Three World Financial Center
New York, New York  10285

Dear Sirs:

         The undersigned understands that you and certain other firms propose to
enter into an underwriting agreement (the "Underwriting Agreement") providing
for the purchase by you and such other firms (the "Underwriters") of shares (the
"Shares") of Common Stock, par value $.001 per share (the "Common Stock"), of H
Power Corp. (the "Company") and that the Underwriters propose to reoffer the
Shares to the public (the "Offering").

         In consideration of the execution of the Underwriting Agreement by the
Underwriters, and for other good and valuable consideration, the undersigned
hereby irrevocably agrees that, without the prior written consent of Lehman
Brothers Inc., the undersigned will not, directly or indirectly, (1) offer for
sale, sell, pledge, or otherwise dispose of (or enter into any transaction or
device that is designed to, or could be expected to, result in the disposition
by any person at any time in the future of) any shares of Common Stock
(including, without limitation, shares of Common Stock that may be deemed to be
beneficially owned by the undersigned in accordance with the rules and
regulations of the Securities and Exchange Commission and shares of Common Stock
that may be issued upon exercise of any option or warrant) or securities
convertible into or exchangeable or exercisable for Common Stock (other than the
Shares) owned by the undersigned on the date of execution of this Lock-Up Letter
Agreement or on the date of the completion of the Offering, or (2) enter into
any swap or other derivatives transaction that transfers to another, in whole or
in part, any of the economic benefits or risks of ownership of such shares of
Common Stock, (any such transaction described in clause (1) or (2) above
hereafter referred to as a "Disposition") whether any Disposition is to be
settled by delivery of Common Stock or other securities, in cash or otherwise,
for a period of 180 days after the date of the final Prospectus relating to the
Offering. Notwithstanding the foregoing, each person may transfer the Common
Stock (i) as a bona fide gift or gifts, provided that the donee or donees
thereof agree to be bound by the restrictions set forth herein or (ii) to any
trust for the direct or indirect benefit of each person or the immediate family,
provided that the trustee of the trust agrees to be bound by the restrictions
set forth herein, and provided further that any such transfer shall not involve
a Disposition for value.


<PAGE>

         [TO BE INCLUDED IN THE LOCK-UP LETTER AGREEMENT TO BE EXECUTED BY
FREDERICK ENTMAN

         provided, however, that the provisions hereof shall not prohibit a
Disposition by Frederick Entman or his affiliates who are parties to the
Stockholders' and Voting Agreement, dated April 5, 2000, referred to in Section
1(gg) of the Underwriting Agreement and described in the Prospectus, of up to a
total of ______ shares of Common Stock owned beneficially by Frederick Entman
during the period commencing the 91st day following the date of the Underwriting
Agreement through and including the 180th day following the date of the
Underwriting Agreement, provided further, that such Disposition shall be subject
to the transfer restrictions set forth in the Stockholders' and Voting
Agreement.]

[TO BE INCLUDED IN THE LOCK-UP LETTER AGREEMENT TO BE EXECUTED BY NORMAN
ROTHSTEIN

         and provided, however, the provisions hereof shall not prohibit a
Disposition by Norman Rothstein and his affiliates who are parties to the
Stockholder's and Voting Agreement, dated April 5, 2000, referred to in Section
1(gg) of the Underwriting Agreement and described in the Prospectus, of up to a
total of ________ shares of Common Stock owned beneficially by Norman Rothstein
during the period commencing the 91st day following the date of the Underwriting
Agreement through and including the 180th day following the date of the
Underwriting Agreement, provided further, that such Disposition shall be subject
to the transfer restrictions set forth in the Stockholders' and Voting
Agreement.]

         In furtherance of the foregoing, the Company and its Transfer Agent are
hereby authorized to decline to make any transfer of securities if such transfer
would constitute a violation or breach of this Lock-Up Letter Agreement

         It is understood that, if the Company notifies you that it does not
intend to proceed with the Offering, if the Underwriting Agreement does not
become effective, or if the Underwriting Agreement (other than the provisions
thereof which survive termination) shall terminate or be terminated prior to
payment for and delivery of the Shares, we will be released from our obligations
under this Lock-Up Letter Agreement.

         The undersigned understands that the Company and the Underwriters will
proceed with the Offering in reliance on this Lock-Up Letter Agreement.





                                       2


<PAGE>


          The undersigned hereby represents and warrants that the undersigned
has full power and authority to enter into this Lock-Up Letter Agreement and
that, upon request, the undersigned will execute any additional documents
necessary in connection with the enforcement hereof. Any obligations of the
undersigned shall be binding upon the heirs, personal representatives,
successors and assigns of the undersigned.

                                       Very truly yours,

                                       By:______________________________________
                                          Name:
                                          Title:

Dated:  _______________








                                       3




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