MAXWELL TECHNOLOGIES INC
S-3MEF, 1999-03-29
ELECTRONIC COMPUTERS
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<PAGE>   1

     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH 29, 1999
                                                      REGISTRATION NO. 333-_____

================================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                          ---------------------------

                                    FORM S-3
                             REGISTRATION STATEMENT
                                     Under
                           The Securities Act of 1933
                          ---------------------------

                           MAXWELL TECHNOLOGIES, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

           DELAWARE                                              95-2390133
(STATE OR OTHER JURISDICTION OF                                 (IRS EMPLOYER
INCORPORATION OR ORGANIZATION)                               IDENTIFICATION NO.)


                               9275 SKY PARK COURT
                           SAN DIEGO, CALIFORNIA 92123
                                 (619) 279-5100
               (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                 INCLUDING AREA CODE, OF REGISTRANTS' PRINCIPAL
                               EXECUTIVE OFFICES)

                           ---------------------------

                             DONALD M. ROBERTS, ESQ.
                                 GENERAL COUNSEL
                           MAXWELL TECHNOLOGIES, INC.
                               9275 SKY PARK COURT
                           SAN DIEGO, CALIFORNIA 92123
                                 (619) 279-5100
            (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                           ---------------------------

                                   COPIES TO:
                             THOMAS A. WALDMAN, ESQ.
                               Riordan & McKinzie
                             300 South Grand Avenue
                                   29th Floor
                          Los Angeles, California 90071
                                 (213) 629-4824

                           ---------------------------


        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon
as practicable after this Registration Statement becomes effective.

        If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

        If any of the securities being registered on this Form are to be offered
on a delayed or continuous basis pursuant to Rule 415 under the Securities Act
of 1933, other than securities offered only in connection with dividend or
interest reinvestment plans, check the following box. [X]

        If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [X] 333-67429 and
333-57947

        If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

        If delivery of the prospectus is expected to be made pursuant to Rule
434, please check the following box. [ ]


                           CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
=================================================================================================================================
           TITLE OF EACH CLASS OF                    AMOUNT           PROPOSED MAXIMUM      PROPOSED MAXIMUM         AMOUNT OF
              SECURITIES TO BE                       TO BE             OFFERING PRICE          AGGREGATE            REGISTRATION
                 REGISTERED                        REGISTERED           PER UNIT(1)        OFFERING PRICE(1)           FEE(1)
- ---------------------------------------------------------------------------------------------------------------------------------
<S>                                              <C>                       <C>                <C>                    <C>   
Common Stock, $.10 par value................     48,000 shares             $21.85             $1,048,800             $292.00
=================================================================================================================================
</TABLE>

(1)     Calculated pursuant to Rule 457, based on the average of the high and
        low sales prices, $23.00 and $20.69 respectively, on March 25, 1999 as
        reported on the Nasdaq National Market.

================================================================================




<PAGE>   2

PROSPECTUS (Subject to Completion)
Dated March 26, 1999


                           MAXWELL TECHNOLOGIES, INC.

                         419,868 SHARES OF COMMON STOCK

                           ---------------------------

        The 419,868 shares (the "Shares") of Common Stock, par value $.10 per
share ("Common Stock"), of Maxwell Technologies, Inc. ("Maxwell" or the
"Company") offered hereby are to be sold by the persons named herein under
"Selling Stockholders."

        The Common Stock is traded on the Nasdaq National Market under the
symbol "MXWL." On March 25, 1999, the reported closing price of the Common Stock
on the Nasdaq National Market was $22.625 per share.

        Holders of the Shares may resell the Shares from time to time in
transactions on the Nasdaq National Market, and may sell the Shares through a
broker or brokers or in the over-the-counter market at prices prevailing on such
exchange or over-the-counter market, as appropriate, at the times of such sales.
The Selling Stockholders may also make private sales directly or through such
broker or brokers or sell the Shares in negotiated transactions. See "Plan of
Distribution." Sales of the Shares may be effected by selling such securities to
or through broker-dealers, and such broker-dealers may receive compensation in
the form of discounts, concessions or commissions from the sellers thereof. Such
sellers and any broker-dealer who acts in connection with the sales of Shares
may be deemed to be "underwriters" as that term is defined in the Securities Act
of 1933, as amended (the "Securities Act"), and any commissions received by them
and profit on any resale of the Shares might be deemed to be underwriting
discounts and commissions under the Securities Act.

        None of the proceeds from the sale of the Shares will be received by the
Company. The Company has agreed to bear all expenses (other than underwriting
discounts and selling commissions) in connection with the registration and sale
of the Shares being registered hereby. See "Plan of Distribution."

                           ---------------------------

                  THIS OFFERING INVOLVES A HIGH DEGREE OF RISK.
                 SEE "RISK FACTORS" BEGINNING ON PAGE 5 HEREOF.

                           ---------------------------

        THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED
UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
CONTRARY IS A CRIMINAL OFFENSE.


                           ---------------------------

                  THE DATE OF THIS PROSPECTUS IS MARCH 26, 1999

                           ---------------------------


NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED OR INCORPORATED BY
REFERENCE IN THIS PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY
OR BY ANY OTHER PERSON. ALL INFORMATION CONTAINED IN THIS PROSPECTUS IS AS OF
THE DATE OF THIS PROSPECTUS. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY
SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT
THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE COMPANY OR IN THE FACTS HEREIN
SET FORTH SINCE THE DATE HEREOF. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO
SELL OR A SOLICITATION OF ANY OFFER TO BUY ANY SECURITY OTHER THAN THE
SECURITIES COVERED BY THIS PROSPECTUS, NOR DOES IT CONSTITUTE AN OFFER TO OR
SOLICITATION OF ANY PERSON IN ANY JURISDICTION IN WHICH SUCH OFFER OR
SOLICITATION MAY NOT LAWFULLY BE MADE.




<PAGE>   3



                                TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                        Page
                                                                        ----
<S>                                                                      <C>
AVAILABLE INFORMATION..................................................  2

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE........................  3

THE COMPANY............................................................  4

RISK FACTORS...........................................................  5

USE OF PROCEEDS........................................................  16

PRINCIPAL AND SELLING STOCKHOLDERS.....................................  16

PLAN OF DISTRIBUTION...................................................  18

DESCRIPTION OF CAPITAL STOCK...........................................  20

LEGAL MATTERS..........................................................  21

EXPERTS................................................................  21
</TABLE>




<PAGE>   4



                              AVAILABLE INFORMATION

        The Company is subject to the informational requirements of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the rules
and regulations thereunder, and in accordance therewith files reports, proxy
statements and other information with the Securities and Exchange Commission
(the "Commission"). Reports, proxy statements and other information filed by the
Company with the Commission can be inspected and copied at the public reference
facilities maintained by the Commission at Room 1024, Judiciary Plaza, 450 Fifth
Street, N.W., Washington, D.C. 20549, and will also be available for inspection
and copying at the regional offices of the Commission located at Seven World
Trade Center, Suite 1300, New York, New York 10048 and at Room 3190, Northwest
Atrium Center, 500 West Madison Street, Chicago, Illinois 60661-2511. Copies of
such material can be obtained by mail from the Public Reference Section of the
Commission at Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 at
prescribed rates. Such reports, proxy statements and other information
concerning the Company are also available for inspection at the offices of The
Nasdaq Stock Market, Reports Section, 1735 K Street, N.W., Washington, D.C.
20006. In addition the Commission maintains a World Wide Web site at
http://www.sec.gov that contains reports, proxy and information statements and
other information regarding registrants, including the Company, that file
electronically with the Commission.

        The Company has filed with the Commission a registration statement on
Form S-3 (together with all exhibits, schedules, amendments, and supplements
thereto, the "Registration Statement") (Registration No. 333-_____) under the
Securities Act of 1933, as amended (the "Securities Act") with respect to the
Common Stock offered by this Prospectus. This Prospectus, which forms a part of
the Registration Statement, does not contain all the information set forth in
the Registration Statement (certain parts of which have been omitted in
accordance with the rules and regulations of the Commission). For further
information with respect to the Company and the Common Stock, reference is made
to the Registration Statement. Statements contained in this Prospectus as to the
contents of any contract, agreement or other document are not necessarily
complete, and, in each instance, reference is made to the copy of the document
filed as an exhibit to the Registration Statement, each such statement being
qualified in all respects by reference to such exhibit. The Registration
Statement may be inspected and copied at the public reference facilities at the
Commission's offices at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W.,
Washington, D.C. 20549, and will also be available for inspection and copying at
the regional offices of the Commission located at Seven World Trade Center,
Suite 1300, New York, New York 10048 and at Room 3190, Northwest Atrium Center,
500 West Madison Street, Chicago, Illinois 60661-2511. Copies of all or any part
thereof may be obtained from such office upon payment of prescribed fees.




                                        2

<PAGE>   5

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

        The following documents which have been filed with the Commission by the
Company are hereby incorporated by reference in this Prospectus.

        (1) Annual Report on Form 10-K for the fiscal year ended July 31, 1998.

        (2) Quarterly Report on Form 10-Q for the quarter ended October 31,
1998.

        (3) Quarterly Report on Form 10-Q for the quarter ended January 31,
1999.

        (4) Description of the Company's Rights contained in the Registration
Statement on Form 8-A dated June 30, 1989.

        (5) Current Report on Form 8-K filed November 13, 1998.

        (6) Definitive Proxy Statement, filed on December 11, 1998, for the 1999
Annual Meeting of Stockholders.

        (7) Current Report on Form 8-K filed February 12, 1999.

        All documents and reports filed by the Company pursuant to Sections
13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this
Prospectus and prior to the termination of the offering of the Common Stock made
hereby shall be deemed to be incorporated by reference in this Prospectus and
shall be a part hereof from the date of filing of such reports and documents.
Any statement contained in this Prospectus or in a document incorporated or
deemed to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Prospectus to the extent that a statement
contained herein or in any subsequently filed document which also is or is
deemed to be incorporated by reference herein modifies or supersedes such
statement. Any statement so modified or superseded shall not be deemed, except
as so modified or superseded, to constitute a part of this Prospectus.

        Copies of all documents which are incorporated herein by reference (not
including the exhibits to such information, unless such exhibits are
specifically incorporated by reference in such information) will be provided
without charge to each person, including any beneficial owner, to whom this
Prospectus is delivered, upon written or oral request. Copies of this
Prospectus, as amended or supplemented from time-to-time, and any other
documents (or parts of documents) that constitute part of this Prospectus under
Section 10(a) of the Securities Act will also be provided without charge to each
such person, upon written or oral request. Requests should be directed to
Maxwell Technologies, Inc., 9275 Sky Park Court, San Diego, California 92123,
Attention: Corporate Secretary; telephone number (619) 279- 5100.





                                        3

<PAGE>   6
                                   THE COMPANY

        The Company is a worldwide leader in pulsed power technologies, the
storage of electrical energy and delivery of power in brief controlled bursts.
The Company has leveraged its technical expertise, gained from over 30 years of
experience performing research and development primarily for the United States
Department of Defense, to develop a portfolio of pulsed power based commercial
products. These products address a range of markets and applications and include
ultracapacitors for advanced electrical energy storage and power delivery,
purification systems for water treatment and the sterilization of medical and
pharmaceutical products and electromagnetic interference ("EMI") filter
capacitors for implantable medical devices. In addition to pulsed power based
products, the Company offers industrial computers and subsystems which are sold
to OEMs in the computer telephony, medical, manufacturing automation and other
markets. Government funded research and development projects continue to be an
important element of the Company's business, serving as an incubator for
technological innovations and a resource of scientific and engineering
expertise.

        In December 1998, the Company acquired KD Components, Inc. KD Components
designs, manufacturers and provides high reliability ceramic capacitors,
primarily for high voltage uses. In order to acquire KD Components, the Company
issued 144,566 shares of Common Stock to the KD Components Stockholders. In
January 1999, the Company acquired Space Electronics Inc. SEI designs,
manufactures and provides electronic components and related services for space
and other high-reliability applications. In order to acquire SEI, the Company
issued 681,234 shares of Common Stock to SEI's Stockholders and Option Holders.

        PowerCache(TM), PureBright(R), CoolPure(R) and JAMIS(R) are trademarks
of the Company. All other trademarks or tradenames referred to or incorporated
by reference in this Prospectus are the property of their respective owners.

        The Company's executive offices are located at 9275 Sky Park Court, San
Diego, California 92123. Its telephone number is (619) 279-5100.



                                        4

<PAGE>   7

                                  RISK FACTORS

        Prospective investors should consider carefully, in addition to other
information contained in this Prospectus, the following factors before
purchasing the shares offered hereby.

        DEVELOPMENT AND MARKETING OF NEW AND EXISTING PRODUCTS

        Many of our products are in the development stage and are alternatives
to existing products or are new technologies that provide capabilities that do
not presently exist in the marketplace. Our success depends on overcoming the
technical, financial and other risks involved in introducing new products and
technologies. Our success in this regard depends on a number of factors,
including:

        o       our ability to identify and develop a market for our new
                products and technologies;

        o       our ability to improve our existing products and technologies;

        o       our ability to accurately anticipate market demand for our
                products and technologies; and

        o       our ability to demonstrate that our products' have technological
                and/or economic advantages over the products of our competitors.

If we cannot successfully address any of these factors, it could have a material
adverse effect on our business, results of operations and financial condition.

        TRANSITION FROM RELIANCE ON GOVERNMENT AGENCIES TO PRIVATE-SECTOR SALES

        Historically, Maxwell has relied upon various government agencies to
fund our research and development, and we have derived a significant portion of
our revenues from the government sector. Our business strategy is to now
concentrate on developing, manufacturing and marketing our products to the
private sector, while maintaining steady revenues from the government sector.
Our success in this transition will depend upon a number of objectives,
including the following:

        o       developing and manufacturing new products at competitive prices;

        o       gaining customer acceptance for our products and services;

        o       expanding of our customer base through our sales and marketing
                efforts;

        o       increasing our manufacturing capacity; and

        o       developing extensions of our existing products and services into
                new applications.

If we are unable to achieve any of these objectives it could have a material
adverse effect on our business, results of operations and financial condition.

        WE RELY EXTENSIVELY ON STRATEGIC RELATIONSHIPS

        We have established and will continue to attempt to establish strategic
relationships with corporate partners and United States government agencies to
develop our products. These relationships allow us to understand and access new
markets, and provide us an opportunity to test our products. If these
relationships are not successful or continued, it could have a material adverse
effect on our sales and growth. The success of these relationships depends on a
number of factors, including:

        o       the interest in our products which are still in the development
                stage;



                                        5

<PAGE>   8

        o       our success in meeting the expectations of our strategic
                partners; and

        o       our partners' success in marketing or willingness to purchase
                any such products.

        We may not be successful in continuing our relationships with our
current strategic partners. In addition, we may not be able to enter into new
strategic relationships on commercially reasonable terms or if we do, these
relationships may not be successful.

        Although we rely extensively on our strategic relationships, these
relationships present several risks to our business, including the following:

        o       Our partners may require us to share control over our
                development, manufacturing and marketing programs, and limit our
                ability to license our technology to others. In addition, some
                of our partners require that we transfer certain of our
                technological rights and restrict our ability to engage in
                certain areas of product development and marketing;

        o       Some of our existing collaborative arrangements permit, and
                future arrangements may also permit, our strategic partners to
                use or disclose technology which we jointly develop without
                paying Maxwell any royalties;

        o       We often grant exclusivity rights to our strategic partners as
                an inducement to the partner to participate in the development
                of a product or application. Any exclusivity rights granted to
                strategic partners may inhibit our ability to find a broader
                market for some of our products. This may have the effect of
                substantially decreasing our revenues during the exclusivity
                period; and

        o       Our strategic partners may seek to manufacture jointly developed
                products on their own or obtain these products from third party
                sources.

        WE DEPEND ON OEM CUSTOMERS AND AS A RESULT INCUR LENGTHY SALES CYCLES

        A substantial portion of our revenues are derived from sales to a
relatively small number of original equipment manufacturer customers, better
known as "OEMs." The timing and volume of these sales depend upon the sales
levels and shipping schedules for the OEM products into which our products are
incorporated. We have no control over the shipping date or volumes of products
shipped by our OEM customers, or whether any of our OEM customers will continue
to ship products that incorporate our products. Therefore, a successful design
"win" for one of our components, such as an ultra-capacitor, does not
automatically translate into increased sales. If these customers fail to sell a
sufficient quantity of products incorporating our components, or if the timing
and volume of our sales to these customers fluctuates, it could have a material
adverse effect on our business, financial condition and results of operations.

        The OEM's decision process leading to the selection of our products and
services is typically lengthy. In addition, before commercial shipments can
begin, a significant amount of time is required to design, engineer and obtain
product approval. Moreover, although OEM customers sometimes substitute a new
and better product into their existing products, market opportunities with
respect to any particular OEM customer typically occur at the time the customer
is engaged in the design of a new product or a substantial enhancement of an
existing product, which typically occur at infrequent intervals. If we fail to
maintain continuing awareness of our OEM customers' product development
schedules, or if we are unable to provide products or technologies at the time
our OEM customers are developing their products, we will miss a market
opportunity that may not reappear for a substantial period of time.



                                        6

<PAGE>   9

        OUR SUCCESS COULD BE ADVERSELY AFFECTED BY OUR ACQUISITION STRATEGY

        As part of our business strategy, we regularly review possible
acquisitions of complementary companies, technologies or products, and
periodically engage in discussions regarding such possible acquisitions. During
fiscal 1999, Maxwell has acquired three businesses with strategic importance to
different areas of our operations. The businesses we acquired are geographically
dispersed, with one located in California, one in Nevada and the other in
Germany. We completed four acquisitions in fiscal 1998. Our acquisition strategy
involves a number of risks, including the following:

        o       incorrectly valuing the commercial potential of new technologies
                owned by target companies;

        o       difficulty in integrating the operations, products, personnel
                and cultures of the companies we acquire;

        o       ineffectively managing geographically disperse operations;

        o       diverting management's attention from our day-to-day business
                operations;

        o       entering markets in which we have limited or no direct
                experience; and

        o       losing key employees of the companies we acquire.

        In addition, similar to the charges that were taken in connection with
two of the acquisitions we completed in fiscal 1998, any future acquisition may
result in dilutive issuances of equity securities; the incurrence of debt; a
decrease in our cash balances; amortization expenses related to goodwill and
other intangible assets; and other charges to operating results, including
acquired in-process research and development. These events could have a material
adverse effect on our business, results of operations and financial condition.
Moreover, there can be no assurance that any equity or debt financings proposed
in connection with any acquisition will be available to us on acceptable terms
or at all, when, and if, we find a suitable company, technology or product to
acquire. We cannot assure that any acquisition we complete will result in
long-term benefits to Maxwell or our stockholders or that our management will be
able to effectively manage the resulting business.

        WE HAVE INCURRED LOSSES HISTORICALLY AND IN THE EVENT OF FUTURE LOSSES,
        THE PRICE OF OUR COMMON STOCK WILL FLUCTUATE

        We have incurred net losses in three of our past five fiscal years. In
the future, we may experience significant fluctuations in our revenues and we
may incur net losses from period to period as a result of a number of factors,
including the following:

        o       the volume and timing of orders and the level of the demand for
                our products;

        o       our ability to fill orders on a timely basis;

        o       the prices at which we sell our products and services as
                compared to the prices of our competitors;

        o       the timing of our product introductions or of our competitors;

        o       the profit margins on our mix of product sales;

        o       the obsolescence of our products resulting from new product
                introductions or changes in customer demand;

        o       the structure and timing of new strategic relationships;



                                        7

<PAGE>   10

        o       the cancellation or suspension by the United States government
                of its programs and contracts with us; and

        o       the dilution, debt, expenses, and/or charges we incur as part of
                our acquisition strategy.

        We anticipate that, in order to increase our market share, we may sell
our products and services at profit margins below those we ultimately expect to
achieve and/or significantly reduce the prices of our products and services in a
particular quarter or quarters. This could have a material adverse effect on our
business, results of operations and financial condition for such periods. The
impact of the foregoing may cause our operating results to be below the
expectations of public market analysts and investors. In such event, the price
of our common stock would likely fluctuate.

        WE MAY EXPERIENCE DIFFICULTIES IN OUR MANUFACTURING PROCESS

        As described in more detail below, we may experience difficulties in (1)
manufacturing our products in increased quantities, (2) outsourcing the
manufacturing of our products, and (3) customizing our manufacturing process.
These difficulties could have a material adverse effect on Maxwell's business,
financial condition and results of operations.

        Manufacturing Increased Quantities. We have limited experience in
manufacturing our products in high volume. It may be difficult for us to
increase the quantity of the new products we manufacture, especially those
products that contain new technologies. It may also be difficult for us to solve
management, technological, engineering and other problems related to our
manufacturing processes. These problems include production yields, quality
control and assurance, component supply, and shortages of qualified management
and other personnel. In addition, in order to manufacture our products in high
volume, we will need to continue to expand our current facilities and/or obtain
additional facilities. We may not be successful in expanding our facilities or
in obtaining additional facilities.

        Outsourcing. We may elect to have some of our products manufactured by
third parties. Outsourcing involves risks with respect to quality assurance,
cost and the absence of close engineering support.

        Customized Manufacturing Process. Part of our ultracapacitor
manufacturing strategy is to implement a process that will allow customization
of our ultracapacitors while retaining the benefits of volume manufacturing and
materials procurement. There can be no assurance that such a process can be
developed and implemented in time to meet our needs in this regard.

        WE HAVE LIMITED MARKETING AND SALES EXPERIENCE AND OUR STRATEGY DEPENDS
        ON THIRD PARTIES

        We have limited experience marketing and selling our products. To sell
our products, we will need to train our marketing and sales personnel to
effectively demonstrate the advantages of our products over the products offered
by our competitors. The highly technical nature of the products we offer may
limit our ability to retain and attract adequate marketing and sales personnel.
Thus, as part of our sales and marketing strategy, we enter into arrangements
with distributors and sales representatives and depend upon their efforts to
sell our products. If we, or the third parties upon which we depend, are unable
to achieve our sales and marketing objectives, it could have a material adverse
effect on our business, results of operations and financial condition.

        OUR SUCCESS DEPENDS UPON PROTECTING OUR INTELLECTUAL PROPERTY RIGHTS

        Our success is heavily dependent upon the establishment and maintenance
of proprietary technologies. Although we attempt to protect our intellectual
property rights through patents, copyrights, trade secrets and other measures,
the steps we take to protect our intellectual property rights may not be
adequate to prevent misappropriation by third parties. Other issues include:

        o       adequately protecting our intellectual property rights under the
                laws of some foreign countries, which may not protect our rights
                to the same extent as do the laws of the United States.



                                        8

<PAGE>   11

        o       the possibility that third parties could "reverse engineer" our
                products in order to determine their method of operation and
                introduce competing products or develop competing technology
                independently.

        Any of these issues could have a material adverse effect on our
business, results of operations and financial condition.

        As our business has expanded, we have placed an increased emphasis on
patents to provide protection for certain of our technologies and products. We
believe that our future success depends in part on our ability to maintain our
patents, add to them where appropriate, and to develop new products and
applications without infringing the patent and other proprietary rights of third
parties. The risks in protecting our patents are:

        o       any patent which we own may be circumvented or challenged and
                held unenforceable or invalid.

        o       our pending or future patent applications, if any, may not be
                issued with the protections we seek.

        o       there can be no assurance that others will not claim rights in
                the technology covered by the patents and other proprietary
                technology owned or licensed by us.

        The invalidity of a patent or determination that Maxwell (or its
licensor) does not hold sole rights to the technology covered thereby could have
a material adverse effect on our business, results of operations and financial
condition, particularly if Maxwell cannot design around others' proprietary
rights.

        Competing research and patent activity in many of our product areas is
substantial and the markets are large enough that conflicting patent and other
proprietary rights claims may result in disputes or litigation. Although we do
not believe that any of our products or proprietary rights infringe upon the
rights of third parties, there can be no assurance that infringement claims will
not be asserted against us in the future. Any such claims, with or without
merit, would have negative effects such as:

        o       time-consuming, costly litigation.

        o       product shipment delays

        o       we could be required to enter into royalty or licensing
                agreements.

        o       we could be required to pay damages or be enjoined from making,
                using or selling the infringing product.

        Likewise, there can be no assurance that a third party's product, if
infringing on our proprietary rights, may be prevented from doing so without
litigation. Any of the foregoing could have a material adverse effect on our
business, results of operations and financial condition.

        A number of the patents and patent applications which we own or license
are subject to "march-in" rights and non-exclusive, royalty-free, confirmatory
licenses held by various governmental agencies or other entities. "March-in"
rights refer to the right of the United States government or agency thereof to
cancel agreements and require a contractor to grant licenses to third parties if
the contractor fails to continue to develop the technology related to the
agreements. Confirmatory licenses permit the United States government to select
vendors other than Maxwell to produce products for the United States government
which would otherwise infringe Maxwell's patent rights which are subject to the
royalty-free licenses. In addition, the United States government has the right
to require Maxwell to grant licenses (including exclusive licenses) under its
patents and patent applications or other inventions to a third party if it
determines that adequate steps have not been taken to commercialize such
inventions or such action is necessary to meet public health or safety needs, is
necessary to meet requirements for public use under federal regulations, or such
action is necessary because Maxwell has not exercised reasonable efforts to
ensure products manufactured pursuant to such invention are manufactured in the
United States. For a more detailed description of Maxwell's proprietary
technology,



                                        9

<PAGE>   12

see "Business--Patents, Licenses and Trademarks" included in Maxwell's Annual
Report on Form 10-K for the fiscal year ended July 31, 1998.

        THERE ARE RISKS ASSOCIATED WITH OUR INTERNATIONAL OPERATIONS

        An increasing portion of our revenues are derived from sales to
customers located outside of the United States, and in fiscal 1998, we acquired
an industrial computer company in the United Kingdom and took the first steps
toward opening industrial computer facilities in France and Germany. We expect
sales outside of the United States to continue to represent a significant and
increasing portion of our future revenues. As a result, our business will
continue to be subject to certain risks generally associated with doing business
abroad, such as foreign government regulations and export controls, as well as
changes in tax laws, tax treaties, tariffs and freight rates. As our
international operations continue to grow, more management resources will be
required to focus on the operation and expansion of our worldwide business and
to manage cultural, language and legal differences inherent in international
operations. To the extent that political, economic and other conditions in these
countries result in any prolonged work stoppages or in our inability to obtain
components or finished products, our business, results of operations and
financial condition could be materially adversely affected. Moreover, changes in
the mix of income from our foreign subsidiaries, expiration of tax holidays and
changes in tax laws and regulations could result in increased tax rates for
Maxwell.

        WE FACE SIGNIFICANT COMPETITION

        The markets in which we sell our products are highly competitive,
rapidly changing and significantly affected by the cost and pricing of products,
by new product introductions and other market activities of industry
participants. Our emerging products also compete with established technologies
in many markets, including batteries in ultracapacitor products and a number of
established methods of treating water and decontaminating food packaging and
medical products with respect to our purification systems.

        Many of our competitors have longer operating histories, significantly
greater financial, technical, marketing and other resources, greater name
recognition, and a larger existing base of customers. In addition, certain
competitors have well-established relationships with customers and with our
potential customers. Furthermore, as our new products gain acceptance, companies
with significantly greater resources than Maxwell could attempt to increase
their presence in these markets. In order to be successful in the future, we
must produce products that can be competitively priced, and must continue to
respond promptly and effectively to the challenges of technological change and
its competitors' innovations by continually enhancing its own product offerings.
Our products may not continue to compete favorably and we may not be successful
in the face of increasing competition from new products and enhancements
introduced by existing competitors or new companies entering the markets in
which we compete.

        THERE ARE RISKS ASSOCIATED WITH OUR CONTINUING BUSINESS WITH THE UNITED
        STATES GOVERNMENT

        A significant portion of our revenues, including revenues of the
newly-acquired Space Electronics unit, are derived from contracts with the
United States government, principally agencies of the United States Department
of Defense, and from subcontracts with government suppliers. The reductions in
defense budgets in the 1990's has adversely affected our traditional business,
particularly in the area of system survivability products and services, such as
weapons effects simulation and testing. Several years ago, we experienced
significant reductions in this business as the Department of Defense responded
to reduced global threats and shrinking defense budgets. We have also
experienced increased competition in bidding for new defense programs from
contractors seeking to replace their lost government business. In addition,
defense spending in general, and the number and size of contracts awarded to us,
could be reduced in the future. A significant loss of United States government
funding would have a material adverse effect on our business, results of
operations and financial condition.

        Our business with the United States government is also subject to
various other risks, including the following:

        o       unilateral termination for the convenience of the government;



                                       10

<PAGE>   13

        o       reduction or modification in the event of changes in the
                government's requirements or budgetary constraints;

        o       increased or unexpected costs causing losses or reduced profits
                under fixed-price contracts or unallowable costs under cost-plus
                contracts;

        o       risks of potential disclosure of our confidential information to
                third parties;

        o       the failure or inability of a contractor to perform its
                obligations under a contract in circumstances where we are the
                prime contractor or subcontractor; and

        o       the failure of the government to exercise options provided for
                in the contracts and the exercise of march-in rights or
                confirmatory licenses by the government.

There can be no assurance that our contracts with the Department of Defense and
other government agencies will not be terminated, reduced or modified, any of
which could have a material adverse effect on our business, results of
operations and financial condition.

        OUR SUCCESS DEPENDS ON OUR ABILITY TO OBTAIN A SUBSTANTIAL AMOUNT OF
        CAPITAL

        We believe that in the future we will need a substantial amount of
capital for a number of purposes including the following:

        o       to achieve our long-term strategic objectives;

        o       to maintain and enhance our competitive position;

        o       to meet anticipated volume production requirements for several
                of our product lines, in particular our ultracapacitors and
                purification systems;

        o       to expanded our manufacturing capabilities and facilities;

        o       to establish viable production alternatives;

        o       to fund our continuing expansion into commercial markets;

        o       to construct and equip additional or existing facilities; or

        o       to acquire new or complementary businesses, product lines and
                technologies.

There can be no assurance that the necessary additional financing will be
available to us on acceptable terms or at all. If adequate funds are not
available, we may be required to change, delay, reduce or eliminate our planned
product commercialization strategy or our anticipated facilities expansion plans
and expenditures, which could have a material adverse effect on our business,
results of operations and financial condition.

        OUR SUCCESS DEPENDS ON OUR KEY PERSONNEL

        Our future performance depends upon the continued service of our key
technical and senior management personnel. Our performance also depends on our
ability to identify, hire, train, retain and motivate high quality personnel,
especially key manufacturing executives and highly skilled engineers and
scientists. The industries in which we compete are characterized by a high level
of employee mobility and aggressive recruiting of skilled personnel. Our
employees may terminate their employment with Maxwell at any time. Accordingly,
there can be no assurance that any of our current key employees will continue to
work for Maxwell. Loss of services of key employees could have a material
adverse effect on our business, financial condition and results of operations.



                                       11

<PAGE>   14

        YEAR 2000 PROBLEMS

        A significant percentage of the software that runs most computers relies
on two digit date codes to perform a number of computation and decision making
functions. As the year 2000 approaches, these computer programs may fail from an
inability to interpret data codes properly, misreading "00" for the year 1900
instead of 2000.

        We believe that our major computer systems are Year 2000 compliant or
will be brought into compliance on a timely basis, though there can be no
assurance in that regard. We may experience problems with our application
software programs, including its financial accounting, billing, payroll,
manufacturing, and engineering software programs, among others. We have taken
steps to bring many of our products which could be impacted by Year 2000
problems into compliance, but no assurance can be given that all of the products
that we have previously sold can be brought into compliance or that customers
and end users will implement the corrective actions that we have recommended or
that such corrective actions will effectively address all problems associated
with Year 2000. Additionally, our customers or third-party component suppliers
and vendors may also experience business disruptions in connection with the Year
2000 problem. Our business, operating results and financial condition could be
materially adversely affected by Year 2000 problems with our own systems and
products or if any of our customers or vendors or other third-party entities
experience a business disruption as a result of Year 2000 problems.

        WE RELY ON A LIMITED NUMBER OF THIRD PARTY SUPPLIERS

        Our ability to manufacture products depends in part on our ability to
secure qualified and adequate sources of materials, components and
sub-assemblies at prices which will facilitate cost competitive products. We
manufacture most of our products using a large number of components or
sub-assemblies, many of which are commercially available industrial parts and
the remainder of which are custom-made to our specifications (by us and certain
qualified outside manufacturers). Some of our suppliers are currently the sole
source of one or more items which we need to manufacture our electromagnetic
interference filters and industrial computing products. On occasion, we have
experienced difficulty in obtaining timely delivery of power supplies for
industrial computers from outside suppliers. This has adversely impacted our
delivery time to our customers and in one circumstance we believe such delivery
problems were a contributing factor to the loss of certain business from a major
customer. There can be no assurance that these and other similar supply problems
will not recur. The current sole domestic source of a component of our EMI
filter has indicated that it plans to design, build and sell a competing filter
in the future. We believe this supplier will continue to sell to Maxwell but, if
necessary, we believe that we could replace this supplier with another vendor or
with a component manufactured by Maxwell. Although we seek to reduce our
dependence on sole and limited source suppliers, the partial or complete loss of
these sources could have at least a temporary material adverse effect on our
business and results of operations and damage customer relationships due to the
complexity of the products supplied and the significant amount of time required
to qualify new suppliers.

        WE ARE EXPOSED TO SIGNIFICANT PRODUCT LIABILITY RISKS

        We may be exposed to certain product liability risks. Our EMI filters
are components of implantable medical devices and, due to the litigious
environment surrounding the medical device industry, may subject us to an
increased risk of product liability claims that may involve significant defense
costs. Other of our products, such as ultracapacitors and purification systems,
may also be used in functions involving significant product liability risks.
There can be no assurance that product liability claims will not be asserted
against us in the future. Although we maintain product liability insurance with
coverage limits we believe to be adequate, there can be no assurance that this
coverage will in fact be adequate to protect us against future product liability
claims. In addition, product liability insurance is expensive and there can be
no assurance that, in the future, product liability insurance will be available
to us in amounts or on terms satisfactory to us, if at all. A successful product
liability claim or series of claims brought against us could have a material
adverse effect on our business, financial condition and results of operations.



                                       12

<PAGE>   15

        WE ARE SUBJECT TO VARIOUS ENVIRONMENTAL REGULATIONS

        We are subject to a variety of governmental regulations relating to the
use, storage, discharge, handling, emission, generation, manufacture and
disposal of toxic or other hazardous substances. If we fail to comply with
current or future regulations, substantial fines could be imposed against us,
our production could be suspended or stopped, or our manufacturing process could
be altered. Such regulations could require us to acquire expensive remediation
or abatement equipment or to incur substantial expenses to comply with
environmental regulations. If we fail to adequately control the use, discharge,
disposal or storage of hazardous or toxic substances, we could be subjected to
significant liabilities.

        OUR FINANCIAL CONDITION COULD BE AFFECTED BY THE STOCK OPTION PLANS AT
        OUR SUBSIDIARIES

        Several of our principal operating subsidiaries have, or will have,
employee stock option plans which provide for the issuance of options to
purchase shares of the subsidiary's common stock. In most cases, we can grant up
to 12% or 15% of the outstanding stock of a subsidiary under its stock option
plan. Certain key employees of one of our subsidiaries, Maxwell Business
Systems, Inc., however, own an aggregate of 20%, and have the right to purchase
up to an additional 29%, of that subsidiary's common stock.

        If the options granted under one of our subsidiary's stock option plans
is exercised, our ownership interest in that subsidiary will be reduced. This
will have the effect of reducing our portion of the net income and dividends
that we receive from that subsidiary, as well as reducing the proceeds if we
were to sell that subsidiary. Ultimately, we expect that our reported earnings
per share will be reduced in future quarters due to the increasing fair value of
certain subsidiaries and the dilution created by options granted under our
subsidiaries' stock option plans.

        Currently, no established trading market exists for the common stock
underlying any of the subsidiary options and such options are not exchangeable
for shares of our common stock. We have no plan to offer an exchangeability
feature for options to purchase shares of our common stock or otherwise provide
liquidity for these subsidiary options, but we could consider such alternatives
in the future.

        OUR FINANCIAL CONDITION COULD BE AFFECTED BY POTENTIAL PUBLIC OFFERINGS
        OF OUR SUBSIDIARIES' STOCK

        Due to our corporate structure of operating through separate
subsidiaries, we could engage in future public offerings of the common stock of
our subsidiaries, sales of subsidiaries or strategic acquisitions with
subsidiary stock if our Board determined that it was in the best interests of
the stockholders to pursue that course of action. Certain of these alternatives
could adversely effect our business, results of operations and financial
condition. For example, any public offering or other sale of a minority portion
of a subsidiary's stock would reduce that subsidiary's contribution to our net
income and earnings per share.

        IT MAY BE DIFFICULT TO HAVE OUR PRODUCTS APPROVED BY THE FDA

Some of our products are subject to the approval process of the Food and Drug
Administration (FDA) because they are used for food storage or in medical
devices. These products include our CoolPure and PureBright technologies and the
EMI filter. There are many aspects of the FDA approval process that could have a
material adverse effect on our business, financial condition and results of
operations, including the following:

        o       the FDA testing and application process is expensive and lengthy
                and varies based on the type of product;

        o       our products may not ultimately receive FDA approval or
                clearance which would prevent us from marketing such products;

        o       the FDA may restrict a product's intended use as a condition to
                approving or clearing such product or place conditions on any
                approval that could restrict the commercial applications of such
                products;



                                       13

<PAGE>   16

        o       the FDA may require post-marketing testing and surveillance to
                monitor the effects of products it initially approves;

        o       the FDA may withdraw its approval or clearance of any product if
                compliance with regulatory standards is not maintained or if
                problems occur following initial marketing; and

        o       failure to comply with existing or future regulatory
                requirements can result in, among other things, fines,
                injunctions, civil penalties, recall or seizure of products,
                total or partial suspension of production, failure of the United
                States government to grant pre-market clearance or pre-market
                approval for products, withdrawal of marketing clearances or
                approvals and criminal prosecution.

        OUR LONG-TERM FIXED-PRICE CONTRACTS MAY BE UNPROFITABLE

        A portion of our software business is conducted under a multi-year
fixed-price contracts with state and local government agencies. In addition, a
portion of our other businesses, primarily those involved in government funded
research and systems development, may also enter into long-term fixed-price
contracts for large hardware systems or components. If we experience
unanticipated delays in program schedules, fail to anticipate costs accurately
or encounter problems with important vendors it could adversely affect the
profitability of these contracts.

        ANTI-TAKEOVER PROVISIONS IN OUR CERTIFICATE OF INCORPORATION AND BYLAWS
        COULD PREVENT TRANSACTIONS WHICH ARE IN THE BEST INTEREST OF OUR
        STOCKHOLDERS

        Certain provisions in our Certificate of Incorporation could make it
more difficult for a third party to acquire control of Maxwell, even if such
change in control would be beneficial to our stockholders. We have a staggered
Board of Directors which means that our directors are divided into three
classes. The directors in each class are elected to serve three-year terms.
Since the three-year terms of each class overlap the terms of the other classes
of directors, the entire board of directors cannot be replaced in any one year.
Furthermore, our Certificate of Incorporation contains a "fair price provision"
intended to require a potential acquirer to obtain the consent of the Board of
Directors to any business combination involving Maxwell. Maxwell's certificate
of incorporation and bylaws also contain provisions barring stockholder action
by written consent and the calling by stockholders of a special meeting. In most
instances, changing such provisions would require a super majority vote by the
stockholders.

        In addition, we have adopted a rights plan. The rights plan and
provisions of our Certificate of Incorporation and Bylaws could delay, deter or
prevent a merger, tender offer, or other business combination or change in
control involving Maxwell that some, or a majority of, our stockholders might
consider to be in their best interests, including offers or attempted takeovers
that could result in our stockholders receiving a premium over the market price
for their shares of Maxwell common stock.

        OUR COMMON STOCK EXPERIENCES LIMITED TRADING VOLUME AND OUR STOCK PRICE
        HAS BEEN VOLATILE

        Shares of Maxwell common stock are traded on the Nasdaq National Market.
The trading volume of our common stock each day is relatively small. This means
that sales or purchases of relatively small blocks of stock can have a
significant impact on the price at which the stock is traded. We believe factors
such as quarterly fluctuations in financial results, announcements of new
technologies impacting our products, announcements by competitors or changes in
securities analysts' recommendations may cause the price of our stock to
fluctuate, perhaps substantially. These fluctuations, as well as general
economic conditions, in the United States and worldwide, such as recessions or
higher interest rates, may adversely affect the market price of our common
stock.

FORWARD-LOOKING STATEMENTS

        This Prospectus may contain forward-looking statements within the
meaning of Section 27A of the Securities Act and Section 21E of the Exchange
Act. Such statements are subject to a number of risks and uncertainties. Actual
results in the future could differ materially from those described in any
forward-looking statements as a result of the



                                       14

<PAGE>   17

Risk Factors set forth above and the matters set forth elsewhere in this
Prospectus generally. The Company undertakes no obligation to publicly release
the result of any revisions to these forward-looking statements that may be made
to reflect any future events or circumstances.



                                       15

<PAGE>   18

                                 USE OF PROCEEDS

        All of the shares of Common Stock covered hereby are being offered by
the Selling Stockholders. The Company will not receive any proceeds from the
sales of Common Stock by the Selling Stockholders.

                       PRINCIPAL AND SELLING STOCKHOLDERS

        The shares of Common Stock to be sold hereunder were issued to the
former stockholders of MAP-Micro Ltd., a United Kingdom private limited company
("MAP-Micro"), Tekna Seal, Inc., a Minnesota corporation ("TSI"), Phoenix Power
Systems, Inc., a California corporation ("Phoenix Power"), and KD Components,
Inc., a Nevada corporation ("KD Components") (collectively, the "Selling
Stockholders") in connection with the acquisitions of those companies by Maxwell
or its subsidiaries. None of the Selling Stockholders has held any position,
office or other material relationship with the Company or any of its affiliates
within the past three years other than as a result of (i) his or her beneficial
ownership of Shares or (ii) the fact that certain Selling Stockholders were
employees of MAP-Micro, TSI, Phoenix Power or KD Components and have become
employees of the Company.

        On January 29, 1998 (the "TSI Closing Date"), Maxwell through its wholly
owned subsidiary, Maxwell Energy Products, Inc., a California corporation
("MEP") completed the acquisition of TSI, pursuant to the terms of an Agreement
and Plan of Reorganization (the "Merger Agreement") dated January 26, 1998, by
and among TSI, the stockholders of TSI, MEP and Maxwell. The acquisition was
accounted for as a pooling of interests. The Merger Agreement provided for the
merger of TSI with and into MEP (the "Merger"). In connection with the Merger,
Maxwell delivered to the stockholders of TSI an aggregate of 154,030 shares of
Common Stock. Pursuant to the terms of the Registration Rights Agreement dated
as of January 29, 1998 (the "TSI Registration Rights Agreement") entered into
among Maxwell and certain stockholders of TSI, the Company agreed to file this
Registration Statement with respect to the sale of Common Stock by those
stockholders who were a party to the TSI Registration Rights Agreement.

        On March 5, 1998 (the "Phoenix Power Closing Date"), Maxwell completed
the acquisition of Phoenix Power, pursuant to the terms of the Stock Purchase
Agreement (the "Phoenix Purchase Agreement") dated March 1, 1998 by and among
the stockholders of Phoenix Power and Maxwell. In connection with the Purchase
Agreement, Maxwell delivered to certain stockholders of Phoenix Power an
aggregate of 100,679 shares of Common Stock. Pursuant to the terms of the
Registration Rights Agreement dated as of March 5, 1998 (the "Phoenix Power
Registration Rights Agreement") entered into among Maxwell and certain
stockholders of Phoenix Power, the Company agreed to file this Registration
Statement with respect to the sale of Common Stock by those stockholders who
were a party to the Phoenix Power Registration Rights Agreement.

        On March 24, 1998 (the "MAP-Micro Closing Date"), Maxwell completed the
acquisition of MAP-Micro and affiliated companies, pursuant to the terms of the
Share Exchange Deed (the "MAP-Micro Purchase Agreement") dated March 24, 1998 by
and among the stockholders of MAP-Micro and Maxwell and to certain other related
documents and agreements involving minority stockholders of companies affiliated
with MAP-Micro. In connection with such Agreements, Maxwell delivered to certain
stockholders of MAP-Micro and affiliated companies an aggregate of 290,076
shares of Common Stock. Pursuant to the terms of the Registration Rights
Agreement entered into in connection with such purchase agreement (the
"MAP-Micro Registration Rights Agreements") entered into among Maxwell and
certain stockholders of MAP-Micro and affiliated companies, the Company agreed
to file this Registration Statement with respect to the sale of Common Stock by
those stockholders who were a party to said Registration Rights Agreements.

        On December 31, 1998 (the "KD Components Closing Date"), Maxwell
completed the acquisition of KD Components, pursuant to the terms of the Stock
Purchase Agreement (the " KD Components Purchase Agreement") dated December 31,
1998 by and among the stockholders of KD Components and Maxwell. In connection
with such KD Components Purchase Agreement, Maxwell delivered to the
stockholders of KD Components an aggregate of 144,566 shares of Common Stock.
Pursuant to the terms of the Registration Rights Agreement entered into in
connection with such purchase agreement (the "KD Components Registration Rights
Agreements") entered into among Maxwell and the stockholders of KD Components,
the Company agreed to file this Registration Statement with respect to the sale
of Common Stock by those stockholders who were a party to said Registration
Rights Agreements.



                                       16

<PAGE>   19

        Pursuant to the terms of each of the TSI, Phoenix Power, MAP-Micro and
KD Components Registration Rights Agreements, the Company and the Selling
Stockholders have agreed to certain indemnity and contribution provisions
between the Company and the Selling Stockholders against certain liabilities
arising under the securities laws. The Company has agreed to bear certain
expenses in connection with the registration of the Shares offered hereby.

        The following table sets forth, with respect to the Selling
Stockholders, the number of shares of Common Stock owned by each Selling
Stockholder prior to this offering and the number of shares of Common Stock
offered for each Selling Stockholder's account.


<TABLE>
<CAPTION>
                                          NUMBER OF                     PERCENTAGE OF
                                           SHARES           NUMBER OF      SHARES
                                        BENEFICIALLY         SHARES      BENEFICIALLY
NAME OF BENEFICIAL OWNER(1)                OWNED             OFFERED       OWNED(1)
- ---------------------------             ------------        ---------   -------------
<S>                                     <C>                 <C>         <C>
Jeffrey M. Day(2) ...............          50,598             16,800         *
Michael W. Day(2) ...............          93,698             31,200         *
Carol Goodridge .................           5,000(3)           5,000         *
Paul Goodridge(2) ...............         135,785(3)         135,788         1.5%
Steven W. Johnson(2) ............           7,437              1,379         *
Brian P. King ...................           7,511              1,679         *
Kenneth C. Maki (2) .............          15,149              1,244         *
Hamid Nekouie ...................           5,194              5,194         *
Jacqueline Ponsford .............           5,000(4)           5,000         *
Mark Ponsford(2) ................         135,788(4)         135,788         1.5%
Stanley J. Weinberger, Jr .......          23,443              6,445         *
Hassan Yarpezeshkan(2) ..........          77,906             74,351         *
</TABLE>

- ----------
  *     Amount represents less than 1% of the Common Stock.

(1)     Information with respect to beneficial ownership is based on information
        furnished to the Company by each stockholder included in the table or
        included in filings with the Securities and Exchange Commission. The
        Company believes that each individual person has sole voting and
        investment power for shares beneficially owned by him, subject to
        community property laws where applicable.

(2)     The stockholder is an employee of the Company.

(3)     Carol Goodridge and Paul Goodridge are married. Each disclaims
        beneficial ownership of the Shares held by the other.

(4)     Jacqueline Ponsford and Mark Ponsford are married. Each disclaims
        beneficial ownership of the Shares held by the other.

        The Shares may be offered from time to time by the Selling Stockholders
named above. However, such Selling Stockholders are under no obligation to sell
all or any portion of such Shares, nor are the Selling Stockholders obligated to
sell any such Shares immediately under this Prospectus. Because the Selling
Stockholders may sell all or part of their shares of Common Stock offered
hereby, no estimate can be given as to the number of shares of Common Stock that
will be held by any Selling Stockholder upon termination of any offering made
hereby.



                                       17

<PAGE>   20

                              PLAN OF DISTRIBUTION

        The Shares are being registered to permit sales of the Shares by the
Selling Stockholders from time to time for 90 days following the effective date
of the Registration Statement of which this Prospectus is a part, or until such
time as all Shares are sold or disposed of. The Company has agreed, among other
things, to bear certain expenses in connection with the registration and sale of
the Shares, including without limitation all registration and filing fees, fees
and expenses of compliance with securities or blue sky laws, printing expenses,
messenger and delivery expenses, National Association of Securities Dealers,
Inc., stock exchange and qualification fees, fees and disbursements of counsel
for the Company and of independent certified public accountants of the Company
(including the expenses of any special audit required by or incident to such
performance), the fees of one counsel and one accountant representing the
Selling Stockholders in connection with the registration and sale of the Shares,
expenses of any underwriters that are customarily requested in similar
circumstances by such underwriters (excluding discounts, commissions or fees of
underwriters, selling brokers, dealer managers or similar securities industry
professionals relating to the distribution of the Shares, which will be borne by
the Selling Stockholders).

        The Shares may be sold from time to time to purchasers directly by any
or all of the Selling Stockholders., or by one of their immediate family members
or a charitable institution that is the beneficiary of a gift from a Selling
Stockholder. Alternatively, the Selling Stockholders may from time to time offer
the Shares to or through underwriters, brokers, dealers or agents, who may
receive compensation in the form of underwriting discounts, concessions or
commissions from the Selling Stockholders or the purchasers of such securities
for whom they may act as agents. The Selling Stockholders and any underwriters,
brokers, dealers or agents that participate in the distribution of the Shares
may be deemed to be "underwriters" within the meaning of the Securities Act and
any profit on the sale of such securities and any discounts, commissions,
concessions or other compensation received by any such underwriter, broker,
dealer or agent may be deemed to be underwriting discounts and commissions under
the Securities Act. Underwriters, brokers, dealers and agents also may be
customers of, engage in transactions with, or perform other services for Maxwell
and its affiliates in the ordinary course of business.

        Any distribution hereunder of the Shares by the Selling Stockholders may
be effected from time to time in one or more of the following transactions: (a)
on the Nasdaq National Market, or through broker-dealers acting as principal or
agent, in transactions (which may involve crosses or block transactions), in
special offerings, or in the over-the-counter market, or otherwise, at market
prices obtainable at the time of sale, at prices related to such prevailing
market prices, at negotiated prices or at fixed prices, (b) to underwriters who
will acquire shares of Common Stock for their own account and resell such shares
in one or more transactions, including negotiated transactions, at a fixed
public offering price or at varying prices determined at the time of sale (any
public offering price and any discount or concessions allowed or reallowed or
paid to dealers may be changed from time to time), (c) directly or through
brokers or agents in private sales at negotiated prices (including without
limitation, pursuant to Rule 144 under the Securities Act), (d) by distributions
or dispositions to shareholders or partners or other persons affiliated or
associated with one or more of the Selling Stockholders or with Maxwell or one
of its affiliates, (e) to lenders pledged as collateral to secure loans, credit
or other financing arrangements and any subsequent foreclosure, if any,
thereunder, (f) through the writing of options or other derivative instruments
(whether listed on an exchange or otherwise) and pursuant to exercise,
conversion, exchange, distribution on or similar delivery in respect of a
derivative security or instrument relating to some or all of such Common Stock,
(g) pursuant to a stock lending or repurchase or reverse repurchase transaction,
or (h) by any other legally available means. Also, offers to purchase the Common
Stock may be solicited by agents designated by the Selling Stockholders from
time to time. The Registration Statement and this Prospectus shall cover any
such sale and resale. Any of such transactions may be effected at market prices
prevailing at the time of sale, at prices prevailing at the time of sale, at
prices related to such prevailing market prices, at negotiated prices or at
fixed prices. To the extent required, the specific amount of Common Stock to be
sold, the purchase price and public offering price, the names of any resale
agent, dealer or underwriter, and the terms and amount of any applicable
commission or discount with respect to a particular offer will be set forth in a
Prospectus Supplement and/or post-effective amendment to the Registration
Statement of which this Prospectus constitutes a part.

        In order to comply with the securities laws of certain states, if
applicable, the Common Stock will be sold hereunder in such jurisdictions only
through registered or licensed brokers or dealers. In addition, in certain
states the



                                       18

<PAGE>   21

Common Stock may not be sold hereunder unless the Common Stock has been
registered or qualified for sale in such state or an exemption from registration
or qualification is available and complied with.

        The Company is not aware of any existing arrangements between any
Selling Stockholder, any other stockholder, broker, dealer, underwriter or agent
relating to the sale or distribution of the Shares.

        Some of the Selling Stockholders may sell shares identified in this
Prospectus without registration or delivery of a prospectus in transactions
permitted by Rule 144 under the Securities Act and in compliance with that rule.

        The Selling Stockholders will be indemnified by the Company, to the
extent permitted by law, against certain civil liabilities, including certain
liabilities under the Securities Act, or will be entitled to contribution in
connection therewith, subject to certain limitations. The Company, at its
request, will be indemnified by the Selling Stockholders, to the extent
permitted by law, against certain civil liabilities, including certain
liabilities under the Securities Act, or will be entitled to contribution in
connection therewith, subject to certain limitations.




                                       19

<PAGE>   22

                          DESCRIPTION OF CAPITAL STOCK

COMMON STOCK

        The Company's authorized capital stock consists of 40,000,000 shares of
Common Stock, $.10 par value. As of February 28, 1999, there were 9,546,224
shares of Common Stock outstanding, excluding shares issuable upon the exercise
of outstanding options to purchase an aggregate of 1,135,603 shares of Common
Stock held by employees, management and directors. Holders of Common Stock are
entitled to one vote for each share held of record on all matters submitted to a
vote of stockholders. There is no cumulative voting for the election of
directors. Holders of Common Stock are entitled to receive ratably such
dividends as may be declared by the Board of Directors out of funds legally
available therefor. In the event of a liquidation, dissolution or winding up of
the Company, holders of Common Stock are entitled to share ratably in all assets
remaining after payment to all creditors. Holders of Common Stock have no
preemptive rights and have no rights to convert their Common Stock into any
other securities. All of the outstanding shares of Common Stock are, and the
shares being offered hereby will upon issuance and sale be, fully paid and
nonassessable.

        The transfer agent and registrar for the Common Stock is ChaseMellon
Shareholder Services, L.L.C.

COMMON STOCK RIGHTS

        On June 20, 1989, the Board of Directors of Maxwell declared a dividend
distribution of one Right for each outstanding share of its common stock, par
value $.10 per share (the "Common Stock"), to stockholders of record at the
close of business on June 30, 1989. Each Right entitles the registered holder to
initially purchase from the Company one-half of a share of Common Stock at a
purchase price of $32.50 per one-half share (the "Purchase Price"), since
adjusted to $16.25 per one-half share. The description and terms of the Rights
are set forth in a rights agreement, as amended (the "Rights Agreement") between
the Company and ChaseMellon Shareholder Services, L.L.C., as Rights Agent.

        In general, the Rights become exercisable or transferable only upon the
occurrence of certain events related to changes in ownership of the Common
Stock. Once exercisable, each Right entitles its holder initially to purchase
from the Company one-half of a share of Common Stock at a purchase price of
$16.25 per one-half share. The Rights become exercisable upon the earlier of the
close of business on (i) the tenth day following public announcement that a
person or group of affiliated or associated persons (an "Acquiring Person") has
acquired, or generally obtained the right to acquire, beneficial ownership of
20% or more of the outstanding shares of Common Stock (the "Stock Acquisition
Date"), or (ii) the tenth business day following the commencement of a tender
offer or exchange offer that would result in a person or group beneficially
owning 20% or more of such outstanding shares of Common Stock. Upon the
occurrence of certain other events related to changes in the ownership of the
Common Stock, each holder of a Right would be entitled to purchase shares of the
Common Stock, or an acquiring corporation's common stock, having a market value
equal to four times the exercise value of the Right. However, Rights are not
exercisable following the occurrence of any of the events set forth above until
such time as the Rights are no longer redeemable by the Company as set forth
below.

        The Rights expire at the close of business on June 20, 1999, unless
earlier redeemed by the Company. At any time until the close of business on the
tenth business day following the Stock Acquisition Date, the Company may redeem
the Rights in whole, but not in part, at a price of $.01 per Right (payable in
cash, Common Stock or other consideration deemed appropriate by the Board of
Directors). After the redemption period has expired, the Company's right of
redemption may be reinstated if an Acquiring Person reduces his beneficial
ownership to 10% or less of the outstanding shares of Common Stock in a
transaction or series of transactions not involving the Company. Immediately
upon the action of the Board of Directors ordering redemption of the Rights, the
Rights will terminate and the only right of the holders of Rights will be to
receive the $.01 redemption price. The Rights, if exercised, will cause a
substantial dilution to the equity interest in Maxwell to a person's or group's
ownership interest in the Company's Common Stock that attempts to acquire the
Company on terms not approved by the Company's Board of Directors. See "Risk
Factors-- Anti-Takeover Provisions."



                                       20

<PAGE>   23

ADDITIONAL ANTI-TAKEOVER PROVISIONS

        The provisions of the Company's certificate of incorporation and bylaws
having possible "anti-takeover" effects are those that: (i) form a classified
Board of Directors with staggered terms of office, eliminate cumulative voting
and permit the removal of directors only for cause; (ii) impose supermajority
shareholder vote or disinterested director approval requirements in connection
with certain mergers, acquisitions and other business combinations, unless
specified minimum price and procedural requirements are satisfied in the
proposed transaction (a "fair price provision"); (iii) eliminate the right of
stockholders to call special stockholders' meetings and limit their right to
take action without a meeting by written consent and (iv) impose supermajority
shareholder vote or disinterested director approval requirements for amendments
to a number of provisions in the Company's charter documents, including the
provisions described in clauses (i) through (iii) above.

        In general, the fair price provisions may have the effect of requiring
payment in cash for shares of Common Stock by an acquiror having accumulated 10%
or more of the Common Stock at a price no less than the highest market price of
the Common Stock within a recent date. Such a 10% or more stockholder must also
meet certain procedural requirements intended to prevent accumulations of
additional stock below the fair price.

DELAWARE LAW

        The Company is subject to the provisions of Section 203 of the Delaware
General Corporation Law, an anti-takeover law. In general, Section 203 prohibits
a publicly held Delaware corporation from engaging in a "business combination"
with an "interested stockholder" for a period of three years after the date of
the transaction in which the person became an interested stockholder, unless
either (i) prior to the date at which the person becomes an interested
stockholder, the Board of Directors approves such transaction or business
combination; (ii) the stockholder acquires more than 85% of the outstanding
voting stock of the corporation (excluding shares held by directors who are
officers or held in certain employee stock plans) upon consummation of such
transaction or (iii) the business combination is approved by the Board of
Directors and by two-thirds of the outstanding voting stock of the corporation
(excluding shares held by the interested stockholder) at a meeting of
stockholders (and not by written consent). A "business combination" includes a
merger, asset sale or other transaction resulting in a financial benefit to such
interested stockholder. An "interested stockholder" is a person who, together
with affiliates and associates, owns (or within three years prior, did own) 15%
or more of the corporation's voting stock.

                                  LEGAL MATTERS

        The validity of the Common Stock in respect of which this Prospectus is
being delivered will be passed on for the Company by Riordan & McKinzie, a
Professional Corporation, Los Angeles, California. A principal of Riordan &
McKinzie owns 6,625 shares of Common Stock.

                                     EXPERTS

        The consolidated financial statements of Maxwell Technologies, Inc.
appearing in Maxwell Technologies, Inc.'s Annual Report (Form 10-K) for the year
ended July 31, 1998, have been audited by Ernst & Young LLP, independent
auditors, as set forth in their report thereon included therein and incorporated
herein by reference. Such consolidated financial statements are incorporated
herein by reference in reliance upon such report given upon the authority of
such firm as experts in accounting and auditing.

        The consolidated financial statements of Space Electronics, Inc.
incorporated by reference in this registration statement have been audited by
Arthur Andersen LLP, independent public accountants, as indicated in their
reports with respect thereto, and are incorporated herein in reliance upon the
authority of said firm as experts in giving said reports.



                                       21

<PAGE>   24

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

        The following is a statement of estimated expenses to be paid by the
Registrant in connection with the issuance and distribution of the securities
being registered. All of the amounts shown are estimated, except the SEC
registration fee.


<TABLE>
<S>                                                                      <C>  
        SEC Registration Fee ................................          $    82
        Legal fees ..........................................           10,000
        Accountants' fees ...................................            5.000
        Blue Sky qualification fees and expenses ............               -- 
        Transfer Agent fees .................................            1,000
        Miscellaneous .......................................            4,918
                                                                        ------ 
             Total ..........................................         $ 21,000
                                                                        ====== 
</TABLE>


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

        Maxwell Technologies, Inc. (the "Company") is a Delaware corporation.
Article V of the Company's Bylaws provides that the Company may indemnify its
officers and Directors to the full extent permitted by law. Section 145 of the
General Corporation Law of the State of Delaware ("GCL") provides that a
Delaware corporation has the power to indemnify its officers and directors in
certain circumstances.

        Subsection (a) of Section 145 of the GCL empowers a corporation to
indemnify any director or officer, or former director or officer, who was or is
a party or is threatened to be made a party to any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative (other than an action by or in the right of the corporation),
against expenses (including attorneys' fees), judgments, fines and amounts paid
in settlement actually and reasonably incurred in connection with such action,
suit or proceeding provided that such director or officer acted in good faith
and in a manner reasonably believed to be in or not opposed to the best
interests of the corporation, and, with respect to any criminal action or
proceeding, provided that such director or officer had no cause to believe his
or her conduct was unlawful.

        Subsection (b) of Section 145 of the GCL empowers a corporation to
indemnify any director or officer, or former director or officer, who was or is
a party or is threatened to be made a party to any threatened, pending or
completed action or suit by or in the right of the corporation to procure a
judgment in its favor by reason of the fact that such person acted in any of the
capacities set forth above, against expenses actually and reasonably incurred in
connection with the defense or settlement of such action or suit, provided that
such director or officer acted in good faith and in a manner reasonably believed
to be in or not opposed to the best interests of the corporation, except that no
indemnification may be made in respect of any claim, issue or matter as to which
such director or officer shall have been adjudged to be liable to the
corporation unless and only to the extent that the Court of Chancery or the
court in which such action was brought shall determine that despite the
adjudication of liability, such director or officer is fairly and reasonably
entitled to indemnity for such expenses which the court shall deem proper.

        Section 145 of the GCL further provides that to the extent a director or
officer of a corporation has been successful in the defense of any action, suit
or proceeding referred to in subsections (a) and (b) or in the defense of any
claim, issue or matter therein, he or she shall be indemnified against expenses
(including attorneys' fees) actually and reasonably incurred by him or her in
connection therewith; that indemnification provided for by Section 145 shall not
be deemed exclusive of any other rights to which the indemnified party may be
entitled; and that the corporation shall have power to purchase and maintain
insurance on behalf of a director or officer of the corporation against any
liability asserted against him or her or incurred by him or her in any such
capacity or arising out of his or her status as such whether or not the
corporation would have the power to indemnify him or her against such
liabilities under Section 145.



                                      II-1

<PAGE>   25

        Article Seventeenth of the Company's Certificate of Incorporation
currently provides that each Director shall not be personally liable to the
Company or its stockholders for monetary damages for breach of fiduciary duty as
a Director, except for liability (i) for any breach of the Director's duty of
loyalty to the Company or its stockholders, (ii) for acts or omissions not in
good faith or which involve intentional misconduct or a knowing violation of
law, (iii) under Section 174 of the GCL, or (iv) for any transaction from which
the Director derived an improper benefit.

        The Company has entered into indemnity agreements with each of its
Directors and executive officers. The indemnity agreements generally indemnify
such persons against liabilities arising out of their service in their
capacities as Directors, officers, employees or agents of the Company. The
Company may from time to time enter into indemnity agreements with additional
individuals who become officers or Directors of the Company.

ITEM 16.  EXHIBITS.


<TABLE>
<CAPTION>
EXHIBIT
NUMBER        DESCRIPTION
- -------       -----------
<S>     <C>
4.1*    Registration Rights Agreement dated as of January 29, 1998 by and among
        the Company and certain shareholders of TSI.

4.2*    Registration Rights Agreement dated as of March 5, 1998 by and among the
        Company and certain shareholders of Phoenix Power.

4.3+    Registration Rights Agreement dated as of March 24, 1998 by and among
        the Company and certain shareholders of MAP-Micro.

4.4+    Registration Rights Agreement dated as of March 24, 1998 by and among
        the Company and certain shareholders of companies affiliated with
        MAP-Micro.

4.5++   Registration Rights Agreement dated as of December 31, 1998 by and among
        the Company and certain shareholders of KD Components.
 
5.1++   Opinion of Riordan & McKinzie, a Professional Corporation.

23.1++  Consent of Ernst & Young LLP, Independent Auditors.

23.2++  Consent of Arthur Andersen LLP, Independent Auditors.

23.3++  Consent of Riordan & McKinzie (included in Exhibit 5.1).

24.1*   Powers of Attorney with respect to the Company (Messrs. Horgan,
        Davidson, Rossi, Potashner and Samuelian).

24.2++  Powers of Attorney with respect to the Company (Mr. Eibl)(included on
        page II-4).
</TABLE>

- -----------------

*       Incorporated by reference from the Company's Registration Statement on
        Form S-3 filed with the SEC on April 17, 1998 (Registration No.
        333-49941).

+       Incorporated by reference from the Company's Registration Statement on
        Form S-3 filed with the SEC on June 24, 1998 (Registration No.
        333-57947).

++      Included in this filing.

ITEM 17.  UNDERTAKINGS.

        The undersigned registrant hereby undertakes:

        (1) To file, during any period in which offers or sales are being made,
a post-effective amendment to this registration statement:

                (i) To include any prospectus required by Section 10(a)(3) of
the Securities Act of 1933.

                (ii) To reflect in the prospectus any facts or events arising
after the effective date of the registration statement (or the most recent
post-effective amendment thereof) which, individually or in the aggregate,
represent a fundamental change in the information set forth in the registration
statement. Notwithstanding the foregoing, any increase or decrease in volume of
securities offered (if the total dollar value of securities offered would not
exceed that 



                                      II-2

<PAGE>   26

which was registered) and any deviation from the low or high end of the
estimated maximum offering range may be reflected in the form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than a 20% change in the maximum
aggregate offering price set forth in the "Calculation of Registration Fee"
table in the effective registration statement.

                (iii) To include any material information with respect to the
plan of distribution not previously disclosed in the registration statement or
any material change to such information in the registration statement.

                Provided, however, that paragraphs (i) and (ii) do not apply if
the registration statement is on Form S- 3, Form S-8 or Form F-3, and the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed with or furnished to the
Commission by the registrant pursuant to section 13 or Section 15(d) of the
Securities Exchange Act of 1934 that are incorporated by reference in the
registration statement.

        (2) That, for the purpose of determining any liability under the
Securities Act of 1933, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

        (3) To remove from registration by means of a post-effective amendment
any of the securities being registered which remain unsold at the termination of
the offering.

        (4) The undersigned registrant hereby undertakes to deliver or cause to
be delivered with the prospectus, to each person to whom the prospectus is sent
or given, the latest annual report to security holders that is incorporated by
reference in the prospectus and furnished pursuant to and meeting the
requirements of Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act of
1934; and, where interim financial information required to be presented by
Article 3 of Regulation S-X are not set forth in the prospectus, to deliver, or
cause to be delivered to each person to whom the prospectus is sent or given,
the latest quarterly report that is specifically incorporated by reference in
the prospectus to provide such interim financial information.

        (5) That, insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers and controlling
persons of the registrant pursuant to the foregoing provisions, or otherwise,
the registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer, or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.



                                      II-3

<PAGE>   27

                                   SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that is has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized in the City of San Diego, State of California on the 29th day of
March, 1999.


                                        MAXWELL TECHNOLOGIES, INC.


                                        By: /s/ Gary J. Davidson
                                           -------------------------------------
                                           Gary J. Davidson
                                           Vice President--Finance and
                                           Administration, Chief Financial
                                           Officer and Treasurer

        KNOW ALL MEN BY THESE PRESENTS, that Carlton J. Eibl constitutes and
appoints Kenneth F. Potashner and Gary J. Davidson, and each of them his true
and lawful attorneys-in-fact and agents with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any and all amendments to this Registration Statement,
including any post-effective amendments as well as any related registration
statement (or amendment thereto) filed in reliance upon Rule 462(b) under the
Securities Act of 1933, and to file the same, with all exhibits thereto, and
other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorney-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite or necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.

        Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.


<TABLE>
<CAPTION>
               SIGNATURE                                 TITLE                               DATE
               ---------                                 -----                               ----
<S>                                        <C>                                          <C>

              *                            President, Chief Executive Officer           March 26, 1999
- --------------------------------           and Director (Principal Executive
       Thomas L. Horgan                    Officer)
                                

   /s/ Gary J. Davidson                    Vice President--Finance and                  March 26, 1999
- --------------------------------           Administration, Chief Financial
       Gary J. Davidson                    Officer and Treasurer (Principal
                                           Financial Officer and Principal
                                           Accounting Officer)

              *                            Director                                     March 26, 1999
- --------------------------------
        Carlton J. Eibl

              *                            Director                                     March 26, 1999
- --------------------------------
         Mark Rossi

              *                            Chairman of the Board and                    March 26, 1999
- --------------------------------           Director
    Kenneth F. Potashner   

              *                            Director                                     March 26, 1999
- --------------------------------
      Karl M. Samuelian


     /s/ Gary J. Davidson 
- --------------------------------
*By: Gary J. Davidson
     Attorney-in-Fact
</TABLE>



                                      II-4


<PAGE>   1

                                                                     EXHIBIT 4.5

                          REGISTRATION RIGHTS AGREEMENT

        This Registration Rights Agreement (this "Agreement") is entered into as
of December 31, 1998 by and among Maxwell Technologies, Inc., a Delaware
corporation ("Maxwell"), and each of Jeffrey M. Day and Michael W. Day (each, a
"Holder" and collectively, the "Holders").


                                 R E C I T A L S

        A. Maxwell, KD Components, Inc., a Nevada corporation ("KDC") and the
Holders are parties to a stock purchase agreement dated as of December 31,1998
(the "Stock Purchase Agreement"); and

        B. Pursuant to the Stock Purchase Agreement, each Holder shall receive
shares of the common stock, $.10 par value, of Maxwell ("Maxwell Common Stock")
in exchange for his shares in KDC; and

        C. This Agreement is the Registration Rights Agreement referred to in
Section 13.2 of the Stock Purchase Agreement and, pursuant thereto, must be
entered into by Maxwell and the Holders as a condition to the consummation of
the transactions contemplated by the Stock Purchase Agreement.


                                A G R E E M E N T

        NOW, THEREFORE, in consideration of the mutual covenants and agreements
contained herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

        1. Certain Definitions. As used in this Agreement, the following terms
shall have the following respective meanings:

                "Eligible Resale Date" shall mean ten days following the date on
which Maxwell has filed with the SEC consolidated financial statements of
Maxwell including the results of operations of Maxwell and KDC combined, of at
least 30 days, in accordance with Regulation S-X under the Exchange Act and SEC
releases and interpretations governing pooling-of-interests accounting treatment
in business combinations.

                "Exchange Act" shall mean the Securities Exchange Act of 1934,
as amended from time to time.



                                        1

<PAGE>   2

                "Form S-3" shall mean such form under the Securities Act as in
effect on the date hereof or any successor registration form under the
Securities Act subsequently adopted by the SEC, which permits inclusion or
incorporation of substantial information by reference to other documents filed
by Maxwell with the SEC.

                "Holder" shall mean a holder of Registrable Securities. On the
date hereof, the Holders are those persons listed on Schedule A hereto.

                "Prospectus" shall mean the prospectus included in any
Registration Statement, as amended or supplemented by any prospectus supplement,
with respect to the terms of the offering of any portion of the Registrable
Securities covered by the Registration Statement and by all other amendments and
supplements to the prospectus, including post-effective amendments and all
material incorporated by reference in such Prospectus.

                "Register," "registered" and "registration" shall mean and refer
to a registration effected by preparing and filing a Registration Statement and
taking all other actions that are necessary or appropriate in connection
therewith, and the declaration or ordering of effectiveness of such Registration
Statement by the SEC.

                "Registration Expenses" shall have the meaning set forth in
Section 4 hereof.

                "Registrable Securities" shall mean the shares of Maxwell Common
Stock (i) issued pursuant to the Stock Purchase Agreement, and (ii) issued as a
dividend or other distribution with respect to or in exchange for or in
replacement of the shares referenced in (i) above; provided, however, that
Registrable Securities shall not include (i) any shares of Maxwell Common Stock
that have previously been sold to the public, (ii) have been sold in a private
transaction, (iii) are eligible for sale to the public under Rule 144, or (iv)
are subject to the Escrow Agreement (as defined in the Stock Purchase
Agreement).

                "Registration Statement" shall mean any registration statement
of Maxwell in compliance with the Securities Act that covers Registrable
Securities pursuant to the provisions of this Agreement, including, without
limitation, the Prospectus, all amendments and supplements to such Registration
Statement, including all post-effective amendments, all exhibits and all
material incorporated by reference in such Registration Statement.

                "Rule 144" shall mean Rule 144 promulgated under the Securities
Act, or any similar successor rule, as the same shall be in effect from time to
time.

                "Rule 415" shall mean Rule 415 promulgated under the Securities
Act, or any similar successor rule, as the same shall be in effect from time to
time.

                "Securities Act" shall mean the Securities Act of 1933, as
amended from time to time.



                                        2

<PAGE>   3

                "SEC" shall mean the Securities and Exchange Commission.

                "Shelf Registration Statement" shall have the meaning set forth
in Section 2(a) hereof.

        2. Form S-3 Registration.

                (a) On the Eligible Resale Date, Maxwell shall file a
Registration Statement on Form S-3 providing for the sale pursuant to Rule 415
(a "Shelf Registration Statement") of the Registrable Securities by the Holders.
Maxwell shall use reasonable efforts to provide 10 days' notice to each Holder
at his respective address, as listed on Schedule A hereto, of the anticipated
filing date of a Shelf Registration Statement under this Section 2(a), and such
notice shall request all information required from a Holder in order to
participate in the Shelf Registration Statement so that such Holder may
participate in such registration. After the Registration Statement has become
effective, Maxwell shall use commercially reasonable efforts to keep such
Registration Statement continuously effective for a period of not fewer than 90
days.

                (b) No Holder shall have the right to register securities under
this Agreement unless such Holder provides and/or confirms in writing prior to
or after the filing of the Registration Statement such information (including,
without limitation, information as to the number of Registrable Securities that
such Holder has sold pursuant to any such Registration Statement from time to
time) as Maxwell requests in connection with such Registration Statement.

                (c) Notwithstanding the foregoing, for a period not to exceed 90
days in any 12-month period, Maxwell shall not be obligated to prepare and file,
or be prevented from delaying or abandoning, the Registration Statement required
hereunder if Maxwell, in its good faith judgment, reasonably believes that the
filing or maintenance of such Registration Statement would require the
disclosure of material non-public information regarding Maxwell and,
accordingly, that the filing thereof, at the time requested, or the offering of
Maxwell Common Stock pursuant thereto, would materially and adversely affect (i)
a pending or scheduled public offering or private placement of securities of
Maxwell or any of its subsidiaries, (ii) an acquisition, merger, consolidation
or similar transaction by or of Maxwell or any of its subsidiaries, (iii)
preexisting and continuing negotiations, discussions or pending proposals with
respect to any of the foregoing transactions, or (iv) the financial condition of
Maxwell in view of the disclosure of any pending or threatened litigation,
claim, assessment or governmental investigation which might be required thereby.

        In the event that Maxwell, in good faith, reasonably believes that such
conditions are continuing after such 90-day period, it may, with the consent of
the Holders of a majority of the Registrable Securities subject (or to be
subject) to the Registration Statement, which



                                        3

<PAGE>   4

consent shall not be unreasonably withheld, extend such 90-day period for an
additional 30 days. Any further delay shall require the consent of the Holders
of all such shares.

        3. Registration Procedures. In connection with Maxwell's registration
obligations pursuant to Section 2 hereof, Maxwell will use its diligent efforts
to effect such registration to permit the sale of the Registrable Securities
covered thereby in accordance with the intended method or methods of disposition
thereof, and pursuant thereto Maxwell will:

                (a) prepare and file with the SEC a Registration Statement with
respect to such Registrable Securities and use its diligent efforts to cause
such Registration Statement to become effective; provided that, before filing
any Registration Statement or Prospectus or any amendment or supplement thereto,
Maxwell will use reasonable efforts to furnish to the Holders and their counsel,
copies of all such documents proposed to be filed at least five days prior
thereto, and Maxwell will not file within such five day period any such
Registration Statement or amendment thereto or any Prospectus or any supplement
thereto to which any such Holder shall reasonably object; provided, further,
that Maxwell will not name or otherwise provide any information with respect to
any Holder in any Registration Statement or Prospectus without the express
written consent of such Holder, unless required to do so by the Securities Act
and the rules and regulations thereunder;

                (b) prepare and file with the SEC such amendments,
post-effective amendments or supplements to the Registration Statement or the
Prospectus as may be necessary to comply with the provisions of the Securities
Act and the rules and regulations thereunder with respect to the disposition of
all securities covered by such Registration Statement;

                (c) promptly notify the selling Holders (i) when the Prospectus
or any Prospectus supplement or post-effective amendment has been filed, and,
with respect to the Registration Statement or any post-effective amendment, when
the same has become effective, (ii) of any request by the SEC for amendments or
supplements to the Registration Statement or the Prospectus or for additional
information, (iii) of the issuance by the SEC of any stop order suspending the
effectiveness of the Registration Statement or the initiation of any proceeding
for that purpose, (iv) of Maxwell's receipt of any notification with respect to
the suspension of the qualification of the Registrable Securities for sale in
any jurisdiction or the initiation or threatening of any proceeding for such
purpose, and (v) of the occurrence of any event which makes any statement made
in the Registration Statement, the Prospectus, or any document incorporated
therein by reference untrue or which requires the making of any change in the
Registration Statement, the Prospectus or any document incorporated therein by
reference in order to make the statements therein not misleading in light of the
circumstances then existing;

                (d) make every reasonable effort to obtain, at the earliest
possible moment, the withdrawal of any order suspending the effectiveness of the
Registration Statement;



                                        4

<PAGE>   5

                (e) deliver to each selling Holder, without charge, such
reasonable number of conformed copies of the Registration Statement (and any
post-effective amendment thereto) and such number of copies of the Prospectus
(including each preliminary prospectus) and any amendment or supplement thereto
(and any document incorporated by reference therein) as such Holder may
reasonably request; Maxwell consents to the use of the Prospectus or any
amendment or supplement thereto by each selling Holder in connection with the
offer and sale of the Registrable Securities covered by the Prospectus or any
amendment or supplement thereto;

                (f) prior to any offering of Registrable Securities covered by a
Registration Statement, register or qualify or cooperate with the selling
Holders in connection with the registration or qualification of such Registrable
Securities for offer and sale under the securities or blue sky laws of such
jurisdictions as such Holder reasonably requests, and use its reasonable efforts
to keep each such registration or qualification effective, including through new
filings, or amendments or renewals, during the period such Registration
Statement is required to be kept effective pursuant to the terms of this
Agreement; and do any and all other acts or things necessary or advisable to
enable the disposition in all such jurisdictions reasonably requested by the
Holders of the Registrable Securities covered by such Registration Statement,
provided that under no circumstance shall Maxwell be required in connection
therewith or as a condition thereof to qualify to do business or to file a
general consent to service of process in any such states or jurisdictions;

                (g) cooperate with the selling Holders to facilitate the timely
preparation and delivery of certificates representing Registrable Securities to
be sold, free of any and all restrictive legends, such certificates to be in
such denominations and registered in such names as such Holders may request;

                (h) upon the occurrence of any event contemplated by Section
3(c)(v) above, prepare a post-effective amendment to the Registration Statement
or to the Prospectus or any document incorporated therein by reference or file
any other required document so that, as thereafter delivered to the purchasers
of the Registrable Securities, the Prospectus will not contain an untrue
statement of a material fact or omit to state any material fact necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading;

                (i) make generally available to the holders of Maxwell's
outstanding securities earnings statements satisfying the provisions of Section
11(a) of the Securities Act, no later than 60 days after the end of any 12 month
period (or 90 days, if such period is a fiscal year) (i) commencing at the end
of any fiscal quarter in which Registrable Securities are sold to underwriters
in a firm or best efforts underwritten offering, or, if not sold to underwriters
in such an offering, (ii) beginning with the first month of Maxwell's first
fiscal quarter commencing after the effective date of the Registration
Statement, which statements shall cover said 12 month period;



                                        5

<PAGE>   6

                (j) provide and cause to be maintained a transfer agent and
registrar for all Registrable Securities covered by each Registration Statement
from, and after a date not later than, the effective date of such Registration
Statement;

                (k) use its best efforts to cause all Registrable Securities
covered by each Registration Statement to be listed, subject to notice of
issuance, prior to the date of the first sale of such Registrable Securities
pursuant to such Registration Statement, on each securities exchange on which
the Maxwell Common Stock is then listed, and admitted to trading on the Nasdaq
National Market, if the Maxwell Common Stock is then admitted to trading on the
Nasdaq National Market;

                (l) enter into such agreements (including underwriting
agreements in customary form containing, among other things, reasonable and
customary indemnities) and take such other actions as the Holders shall
reasonably request in order to expedite or facilitate the disposition of such
Registrable Securities; and

                (m) cooperate with the selling Holders and the managing
underwriter or underwriters in their marketing efforts with respect to the sale
of the Registrable Securities, including participation by Maxwell management in
"road show" presentations.

Each Holder agrees that, upon receipt of any notice from Maxwell of the
happening of any event of the kind described in Section 3(c)(v) hereof, such
Holder will forthwith discontinue disposition of Registrable Securities under
the Prospectus related to the applicable Registration Statement until such
Holder's receipt of the copies of the amended or supplemented Prospectus
contemplated by Section 3(h) hereof, or until Maxwell advises such Holder in
writing that the use of the Prospectus may be resumed. It shall be a condition
precedent to Maxwell's obligation to take any action pursuant to this Section 3
with respect to the Registrable Securities of any selling Holder that such
Holder furnish to Maxwell such information regarding itself and the Registrable
Securities it holds, as shall be required by the Securities Act to effect the
registration of such Holder's Registrable Securities.

        4. Registration Expenses. All expenses incident to any registration to
be effected hereunder and incident to Maxwell's performance of or compliance
with this Agreement, including without limitation all registration and filing
fees, fees and expenses of compliance with securities or blue sky laws, printing
expenses, messenger and delivery expenses, National Association of Securities
Dealers, Inc., stock exchange and qualification fees, fees and disbursements of
Maxwell's counsel and of independent certified public accountants of Maxwell
(including the expenses of any special audit required by or incident to such
performance), the fees of one counsel and one accountant representing the
Holders in such offering, expenses of any underwriters that are customarily
requested in similar circumstances by such underwriters (excluding discounts,
commissions or fees of underwriters, selling brokers, dealer managers or similar
securities industry professionals relating to the distribution of the
Registrable Securities, which will be borne by the Holders), all such expenses
being



                                        6

<PAGE>   7

herein called "Registration Expenses," will be borne by Maxwell. Maxwell will
also pay its internal expenses, the expense of any annual audit and the fees and
expenses of any person retained by Maxwell.

        5. Holders' Covenants. Each Holder covenants and agrees:

                (a) To sell all Registrable Securities only through a
broker-dealer approved by Maxwell in writing; and

                (b) During the time the Registration Statement filed pursuant to
Section 2 is effective, no Holder shall sell more than 25,000 shares of his
Registrable Securities during any five consecutive trading days. Each Holder
understands and agrees these manner of sale requirements are entered into for
the benefit of Maxwell and the other Holder.

        6. Indemnification.

                (a) Indemnification by Maxwell. Maxwell agrees to indemnify and
hold harmless each Holder of Registrable Securities, its officers, directors,
partners and employees and each person who controls such Holder (within the
meaning of Section 15 of the Securities Act) from and against any and all
losses, claims, damages and liabilities (including any investigation, legal or
other expenses reasonably incurred in connection with, and any amount paid in
settlement of, any action, suit or proceeding or any claim asserted)
(collectively, "Damages") to which such Holder may become subject under the
Securities Act, the Exchange Act or other federal or state securities law or
regulation, at common law or otherwise, insofar as such Damages arise out of or
are based upon (i) any untrue statement or alleged untrue statement of a
material fact contained in any Registration Statement, Prospectus or preliminary
prospectus or any amendment or supplement thereto, (ii) the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading, or (iii) any violation or alleged
violation by Maxwell of the Securities Act, the Exchange Act or any state
securities or blue sky laws in connection with the Registration Statement,
Prospectus or preliminary prospectus or any amendment or supplement thereto,
provided that Maxwell will not be liable to any Holder to the extent that such
Damages arise from or are based upon any untrue statement or omission (x) based
upon written information furnished to Maxwell by any Holder expressly for the
inclusion in such Registration Statement, (y) made in any preliminary prospectus
if any Holder failed to deliver a copy of the Prospectus with or prior to the
delivery of written confirmation of the sale by such Holder to the party
asserting the claim underlying such Damages and such Prospectus would have
corrected such untrue statement or omission and (z) made in any Prospectus if
such untrue statement or omission was corrected in an amendment or supplement to
such Prospectus and such Holder failed to deliver such amendment or supplement
prior to or concurrent with the sale of Registrable Securities to the party
asserting the claim underlying such Damages.



                                        7

<PAGE>   8

                (b) Indemnification by Holder of Registrable Securities. Each
Holder of Registrable Securities whose Registrable Securities are sold under a
Prospectus which is a part of a Registration Statement agrees to indemnify and
hold harmless Maxwell, its directors and each officer who signed such
Registration Statement and each person who controls Maxwell (within the meaning
of Section 15 of the Securities Act), and each other Holder of Registrable
Securities whose Registrable Securities are sold under the Prospectus which is a
part of such Registration Statement (and such Holder's officers, directors and
employees and each person who controls such Holder within the meaning of Section
15 of the Securities Act), under the same circumstances as the foregoing
indemnity from Maxwell to each Holder of Registrable Securities to the extent
that such losses, claims, damages, liabilities or actions arise out of or are
based upon any untrue statement of a material fact or omission of a material
fact that was made in the Prospectus, the Registration Statement, or any
amendment or supplement thereto, in reliance upon and in conformity with
information relating to such Holder furnished in writing to Maxwell by such
Holder expressly for use therein, provided that in no event shall the aggregate
liability of any selling Holder of Registrable Securities exceed the amount of
the net proceeds received by such Holder upon the sale of the Registrable
Securities giving rise to such indemnification obligation. Maxwell and the
selling Holders shall be entitled to receive indemnities from underwriters,
selling brokers, dealer managers and similar securities industry professionals
participating in the distribution, to the same extent as customarily furnished
by such persons in similar circumstances.

                (c) Conduct of Indemnification Proceedings. Any person entitled
to indemnification hereunder will (i) give prompt notice to the indemnifying
party of any claim with respect to which it seeks indemnification and (ii)
permit such indemnifying party to assume the defense of such claim with counsel
reasonably satisfactory to the indemnified party; provided, however, that any
person entitled to indemnification hereunder shall have the right to employ
separate counsel and to participate in the defense of such claim, but the fees
and expenses of such counsel shall be at the expense of such person and not of
the indemnifying party unless (A) the indemnifying party has agreed to pay such
fees or expenses, (B) the indemnifying party shall have failed to assume the
defense of such claim and employ counsel reasonably satisfactory to such person
or (C) in the reasonable judgment of such person and the indemnifying party,
based upon written advice of their respective counsel, a conflict of interest
may exist between such person and the indemnifying party with respect to such
claims (in which case, if the person notifies the indemnifying party in writing
that such person elects to employ separate counsel at the expense of the
indemnifying party, the indemnifying party shall not have the right to assume
the defense of such claim on behalf of such person). If such defense is not
assumed by the indemnifying party, the indemnifying party will not be subject to
any liability for any settlement made without its consent (but such consent will
not be unreasonably withheld). No indemnified party will be required to consent
to entry of any judgment or enter into any settlement which does not include as
an unconditional term thereof the giving by all claimants or plaintiffs to such
indemnified party of a release from all liability in respect to such claim or
litigation. Any indemnifying party who is not entitled to, or elects not to,
assume the defense of a claim will not be obligated to pay



                                        8

<PAGE>   9

the fees and expenses of more than one counsel for all parties indemnified by
such indemnifying party with respect to such claim. As used in this Section
6(c), the terms "indemnifying party", "indemnified party" and other terms of
similar import are intended to include only Maxwell (and its officers, directors
and control persons as set forth above) on the one hand, and the Holders (and
their officers, directors, partners, employees, attorneys and control persons as
set forth above) on the other hand, as applicable.

                (d) Contribution. If for any reason the foregoing indemnity is
unavailable, then the indemnifying party shall contribute to the amount paid or
payable by the indemnified party as a result of such losses, claims, damages,
liabilities or expenses (i) in such proportion as is appropriate to reflect the
relative benefits received by the indemnifying party on the one hand and the
indemnified party on the other, or (ii) if the allocation provided by clause (i)
above is not permitted by applicable law or provides a lesser sum to the
indemnified party than the amount hereinafter calculated, in such proportion as
is appropriate to reflect not only the relative benefits received by the
indemnifying party on the one hand and the indemnified party on the other but
also the relative fault of the indemnifying party and the indemnified party as
well as any other relevant equitable considerations. Notwithstanding the
foregoing, no Holder shall be required to contribute any amount in excess of the
amount such Holder would have been required to pay to an indemnified party if
the indemnity under Section 6(b) hereof was available. 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 obligation of any person to
contribute pursuant to this Section 6(d) shall be several and not joint.

                (e) Timing of Payments. An indemnifying party shall make
payments of all amounts required to be made pursuant to the foregoing provisions
of this Section 6 to or for the account of the indemnified party from time to
time promptly upon its receipt of bills or invoices relating thereto or when
otherwise due or payable.

                (f) Survival. The indemnity and contribution agreements
contained in this Section 6 shall remain in full force and effect, regardless of
any investigation made by or on behalf of a participating Holder, its officers,
directors, partners, attorneys, agents or any person, if any, who controls such
Holder as aforesaid, and shall survive the transfer of such Registrable
Securities by such Holder.

        7. Preparation; Reasonable Investigation. In connection with the
preparation and filing of a Registration Statement pursuant to the terms of this
Agreement:

                (a) Maxwell shall, with respect to a Registration Statement
filed pursuant to Section 2, give the Holders of such Registrable Securities so
registered, their underwriters, if any, and their respective counsel and
accountants the opportunity to participate in the preparation of such
Registration Statement (other than reports and proxy statements incorporated
therein by reference and lawfully and properly filed with the SEC) and each



                                        9

<PAGE>   10

Prospectus included therein or filed with the SEC, and each amendment thereof or
supplement thereto; and

                (b) Maxwell shall give the Holders of such Registrable
Securities so registered, their underwriters, if any, and their respective
counsel and accountants such reasonable access to its books and records and such
opportunities to discuss the business of Maxwell with its officers and the
independent public accountants who have certified its financial statements as
shall be necessary, in the opinion of such Holders or such underwriters, to
conduct a reasonable investigation within the meaning of Section 11(b)(3) of the
Securities Act.

        8. Rule 144. Maxwell covenants that it will use commercially reasonable
efforts to file, on a timely basis, the reports required to be filed by it under
the Securities Act and the Exchange Act and the rules and regulations adopted by
the SEC thereunder, and it will take such further action as any Holder may
reasonably request (including, without limitation, compliance with the current
public information requirements of Rule 144(c) and Rule 144A), all to the extent
required from time to time to enable such Holder to sell Registrable Securities
without registration under the Securities Act within the limitation of the
conditions provided by Rule 144, or any similar rule or regulation hereafter
adopted by the SEC. Upon the request of any Holder, Maxwell will deliver to such
holder a written statement verifying that Maxwell has complied with such
information and requirements.

        9. Specific Performance. Each Holder, in addition to being entitled to
exercise all rights provided herein or granted by law, including recovery of
damages, will be entitled to specific performance of its rights under this
Agreement. Maxwell agrees that monetary damages would not be adequate
compensation for any loss incurred by reason of a breach by it of the provisions
of this Agreement and hereby agrees to waive the defense in any action for
specific performance that a remedy at law would be adequate.

        10. Notices. All notices and other communications required or permitted
hereunder shall be in writing and shall be mailed by United States first-class
mail, postage prepaid, sent by facsimile or delivered personally by hand or
nationally recognized courier addressed (a) if to a Holder, as indicated on the
list of Holders attached hereto as Schedule A, or at such other address as such
Holder or permitted assignee shall have furnished to Maxwell in writing, or (b)
if to Maxwell, at 9275 Sky Park Court, San Diego, CA 92123; Attention: Gary J.
Davidson and Donald M. Roberts; Facsimile (619) 277-6754, or such other address
provided to the Holders in writing. All such notices and other written
communications shall be effective on the date of mailing, facsimile transfer or
delivery.

        11. Successors and Assigns: Assignment of Rights. The rights and
benefits of a Holder hereunder may not be assigned to a transferee or assignee,
without the consent of Maxwell; provided, however, that, no later than the 10th
day prior to the filing of the Registration Statement under Section 2 hereof,
the rights and benefits of a Holder hereunder



                                       10

<PAGE>   11

may be transferred in connection with a transfer or assignment of any
Registrable Securities held by such Holder (i) by gift to immediate family
members of such Holder, or to trusts or other entities for the sole benefit
thereof, or (ii) by gift to any entity in which such Holder, his or her
immediate family members, or trusts or other entities for the sole benefit
thereof beneficially own all the voting securities; provided, however, that in
each case, the transferee executes an instrument pursuant to which the
transferee agrees to be bound by the terms and conditions hereof as a Holder,
and such other documents related to the Stock Purchase Agreement as Maxwell or
its counsel may reasonably require, after which, such transferee shall be deemed
a "Holder" hereunder. Any transfer of Registrable Securities, and rights
hereunder, shall be subject to compliance with all applicable securities laws
and the restrictions contained in the Investment Letter executed by each Holder
pursuant to the Stock Purchase Agreement (the "Investment Letter").

        12. Severability. In the event that any one or more of the provisions
contained herein, or the application thereof in any circumstance, is held
invalid, illegal or unenforceable, the validity, legality and enforceability of
any such provision in every other respect and of the remaining provisions
contained herein shall not be affected or impaired thereby.

        13. Entire Agreement; Amendment; Waiver. This Agreement, the Stock
Purchase Agreement and the other agreements contemplated thereby constitute the
full and entire understanding and agreement among the parties with regard to the
subjects hereof and thereof. Without limiting the foregoing, the rights of the
Holders to registration pursuant to the terms of this Agreement shall be subject
to the limitations on resale contained in the Investment Letter. Neither this
Agreement nor any term hereof may be amended, waived, discharged or terminated,
except by a written instrument signed by Maxwell and the Holders of at least 51%
of the Registrable Securities and any such amendment, waiver, discharge or
termination shall be binding upon all the parties hereto, but in no event shall
the obligation of any party hereto be materially increased, except upon the
written consent of such party.

         14. Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be original, and all of which together shall
constitute one instrument.

         15. Governing Law. This Agreement shall be governed by, and construed
in accordance with, the laws of the State of Delaware without giving effect to
principles of conflicts of laws thereof.

         16. No Third Party Beneficiaries. The covenants and agreements set
forth herein are for the sole and exclusive benefit of the parties hereto and
their respective successors and assigns and such covenants and agreements shall
not be construed as conferring, and are not intended to confer, any rights or
benefits upon any other persons.



                                       11

<PAGE>   12



                IN WITNESS WHEREOF, the parties hereto have executed this
Agreement as of the day and year first above written.


                                        MAXWELL TECHNOLOGIES, INC.


                                        By:
                                           -------------------------------------
                                           Name:
                                           Title:




                                        ----------------------------------------
                                        Jeffrey M. Day




                                        ----------------------------------------
                                        Mike W. Day





                          REGISTRATION RIGHTS AGREEMENT



                                       12

<PAGE>   1


                                                                     EXHIBIT 5.1

                               RIORDAN & MCKINZIE
                         A PROFESSIONAL LAW CORPORATION

                         300 S. GRAND AVENUE, 29TH FLOOR
                       LOS ANGELES, CALIFORNIA 90071-3155


                                 March 29, 1999


Maxwell Technologies, Inc.
9275 Sky Park Court
San Diego, California  92123

Ladies and Gentlemen:

        We have acted as counsel to Maxwell Technologies, Inc., a Delaware
corporation (the "Company"), in connection with the registration under the
Securities Act of 1933, as amended (the "1933 Act"), of 419,868 authorized and
previously issued shares of the Common Stock (the "Shares"), $.10 par value per
share, of the Company to be sold. This opinion is delivered to you in accordance
with the requirements of Item 601(b)(5) of Regulation S-K under the 1933 Act in
connection with the Registration Statement on Form S-3, including all
pre-effective and post-effective amendments thereto (the "Registration
Statement"), for the aforementioned sale, filed with the Securities and Exchange
Commission (the "Commission") under the 1933 Act. We do not opine in this letter
as to 419,868 shares of Common Stock included within the prospectus forming a
part of the Registration Statement and the subject of our opinions dated
November 17, 1998, June 24, 1998 and April 17, 1998.

        In rendering the opinion set forth herein, we have made such
investigations of fact and law, and examined such documents and instruments, or
copies thereof established to our satisfaction to be true and correct copies
thereof, as we have deemed necessary under the circumstances.

        Based upon the foregoing and such other examination of law and fact as
we have deemed necessary, and in reliance thereon, we are of the opinion that,
the Shares are duly authorized, validly issued, fully paid and non-assessable.

        We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to this firm under the caption
"Legal Matters" in the Prospectus which is a part of the Registration Statement.
In giving such consent, we do not thereby admit that we are in the category of
persons whose consent is required under Section 7 of the 1933 Act or the rules
and regulations of the Commission thereunder.

                                       Very truly yours,

                                       Riordan & McKinzie




<PAGE>   1


                                                                    EXHIBIT 23.1


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-3) and related Prospectus of Maxwell
Technologies, Inc. for the registration of 419,868 shares of its common stock
and to the incorporation by reference therein of our report dated September 15,
1998, with respect to the consolidated financial statements of Maxwell
Technologies, Inc. included in its Annual Report (Form 10- K) for the year ended
July 31, 1998, filed with the Securities and Exchange Commission.



                                        /s/ Ernst & Young LLP
                                        ERNST & YOUNG LLP

San Diego, California
March 25, 1999




<PAGE>   1
                                                                    EXHIBIT 23.2


                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation by
reference in this Registration Statement on Form S-3 of Maxwell Technologies,
Inc. of our report on the financial statements of Space Electronics Inc., dated
January 23, 1998 included in Maxwell Technologies, Inc. Form 8-K, dated February
12, 1999 and to all references to our firm included in this Registration
Statement. It should be noted that we have not audited any financial statements
of Space Electronics Inc. subsequent to December 31, 1997 or performed any audit
procedures subsequent to the date of our report. 

                                             ARTHUR ANDERSEN LLP

                                             /s/ Arthur Andersen LLP


San Diego, California
March 25, 1999


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