UNITED STATES
                         SECURITIES EXCHANGE COMMISSION
                             Washington, D.C. 20549

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


                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                                (Amendment No. )

                           MAXWELL TECHNOLOGIES, INC.
                           --------------------------
                                (Name of Issuer)


                Common Stock, $0.10 par value per share per share
                -------------------------------------------------
                         (Title of Class of Securities)


                                   577767106
                                   ---------
                                 (CUSIP Number)


                                 June 28, 2006
                                 -------------
             (Date of Event which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                |_| Rule 13d-1(b)

                                |X| Rule 13d-1(c)

                                |_| Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


                          Continued on following pages
                                Page 1 of 9 Pages
                              Exhibit Index: Page 8



                                  SCHEDULE 13G

CUSIP No.: 577767106                                          Page 2 of 9 Pages
.................................................................................
1.        Names of Reporting Persons.

          I.R.S. Identification Nos. of above persons (entities only).


          KINGDON CAPITAL MANAGEMENT, LLC
.................................................................................
2.        Check the Appropriate Box if a Member of a Group

          (a) [  ]

          (b) [  ]
.................................................................................
3.        SEC Use Only
.................................................................................
4.        Citizenship or Place of Organization

          Delaware
.................................................................................
Number of Shares      5.       Sole Voting Power                  869,360
Beneficially Owned    ..........................................................
by Each Reporting     6.       Shared Voting Power                0
Person With           ..........................................................
                      7.       Sole Dispositive Power             869,360
                      ..........................................................
                      8.       Shared Dispositive Power           0
.................................................................................
9.        Aggregate Amount Beneficially Owned by Each Reporting Person

          869,360
.................................................................................
10.       Check if the Aggregate Amount in Row (9) Excludes Certain Shares
          (See Instructions)

          [  ]
.................................................................................
11.       Percent of Class Represented by Amount in Row (9)

          5.1%
.................................................................................
12.       Type of Reporting Person:

          OO;IA




                                  SCHEDULE 13G

CUSIP No.: 577767106                                          Page 3 of 9 Pages


.................................................................................
1.        Names of Reporting Persons.

          I.R.S. Identification Nos. of above persons (entities only).


          MARK KINGDON
.................................................................................
2.        Check the Appropriate Box if a Member of a Group

          (a) [  ]

          (b) [  ]
.................................................................................
3.        SEC Use Only
.................................................................................
4.        Citizenship or Place of Organization

          United States of America
.................................................................................
Number of Shares      5.       Sole Voting Power                  0
Beneficially Owned    ..........................................................
by Each Reporting     6.       Shared Voting Power                869,360
Person With           ..........................................................
                      7.       Sole Dispositive Power             0
                      ..........................................................
                      8.       Shared Dispositive Power           869,360
.................................................................................
9.        Aggregate Amount Beneficially Owned by Each Reporting Person

          869,360
.................................................................................
10.       Check if the Aggregate Amount in Row (9) Excludes Certain Shares
          (See Instructions)

          [  ]
.................................................................................
11.       Percent of Class Represented by Amount in Row (9)

          5.1%
.................................................................................
12.       Type of Reporting Person:

          HC



                                                               Page 4 of 9 Pages


Item 1(a).        Name of Issuer:

                  Maxwell Technologies, Inc. (the "Issuer")

Item 1(b).        Address of Issuer's Principal Executive Offices:

                  9244 Balboa Avenue, San Diego, CA. 92123.

Item 2(a).        Name of Person Filing

                  This  Statement  is filed on behalf  of each of the  following
persons (collectively, the "Reporting Persons"):

                  i)    Kingdon  Capital   Management,   LLC  ("Kingdon  Capital
                        Management"); and

                  ii)   Mark Kingdon ("Mr. Kingdon").

                  This Statement  relates to Shares (as defined herein) held for
the  accounts  of  Kingdon  Associates,  L.P.,  a New York  limited  partnership
("Kingdon  Associates"),  M. Kingdon  Offshore Ltd., a Cayman  Islands  exempted
company ("Kingdon Offshore"),  and Kingdon Family Partnership,  L.P., a New York
limited partnership ("Kingdon Family  Partnership").  Kingdon Capital Management
serves as investment manager to each of Kingdon Associates, Kingdon Offshore and
Kingdon Family Partnership.  In such capacity, Kingdon Capital Management may be
deemed  to have  voting  and  dispositive  power  over the  Shares  held for the
accounts of each of Kingdon  Associates,  Kingdon  Offshore  and Kingdon  Family
Partnership. Mr. Kingdon is the managing member and president of Kingdon Capital
Management.

Item 2(b).        Address of Principal Business Office or, if None, Residence

                  The  address  of the  principal  business  office  of  each of
Kingdon Capital Management and Mr. Kingdon is 152 West 57th Street,  50th Floor,
New York, New York 10019.

Item 2(c).        Citizenship

                  i)    Kingdon  Capital   Management  is  a  Delaware   limited
                        liability company; and
                  ii)   Mr.  Kingdon  is a  citizen  of  the  United  States  of
                        America.

Item 2(d).        Title of Class of Securities:

                  Common Stock, $0.10 par value per share per share (the
                  "Shares")

Item 2(e).        CUSIP Number:

                  577767106


                                                               Page 5 of 9 Pages

Item 3.           If This Statement is Filed Pursuant to  ss.ss.240.13d-1(b)  or
                  240.13d-2(b) or (c), check Whether the Person Filing is a:

                  This Item 3 is not applicable.

Item 4.           Ownership:

Item 4(a).        Amount Beneficially Owned:

                  As of July 7, 2006,  each  of Kingdon  Capital  Management and
Mr.  Kingdon  may be deemed to  beneficially  own  869,360  Shares.  This amount
consists of: (A) 230,600 Shares held for the account of Kingdon Associates;  (B)
603,860 Shares held for the account of Kingdon  Offshore;  and (C) 34,900 Shares
held for the account of Kingdon Family Partnership.

Item 4(b).        Percent of Class:

                  The  number  of  Shares  of  which  each  of  Kingdon  Capital
Management and Mr. Kingdon may be deemed to be the beneficial owner  constitutes
approximately  5.1% of the  total  number  of  Shares  outstanding  (based  upon
information  provided by the Issuer in its most recent  quarterly report on Form
10-Q filed with the Securities and Exchange  Commission,  there were  17,080,544
Shares outstanding as of May 3, 2006).

Item 4(c).        Number of Shares of which such person has:

Kingdon Capital Management:
---------------------------

(i) Sole power to vote or direct the vote:                               869,360

(ii) Shared power to vote or direct the vote:                                  0

(iii) Sole power to dispose or direct the disposition of:                869,360

(iv) Shared power to dispose or direct the disposition of:                     0

Mr. Kingdon:
------------

(i) Sole power to vote or direct the vote:                                     0

(ii) Shared power to vote or direct the vote:                            869,360

(iii) Sole power to dispose or direct the disposition of:                      0

(iv) Shared power to dispose or direct the disposition of:               869,360


Item 5.           Ownership of Five Percent or Less of a Class:

                  This Item 5 is not applicable.

Item 6.           Ownership  of More than  Five  Percent  on  Behalf of  Another
                  Person:

                  This Item 6 is not applicable



                                                               Page 6 of 9 Pages

Item 7.           Identification  and  Classification  of the  Subsidiary  Which
                  Acquired the Security  Being Reported on By the Parent Holding
                  Company:

                  See disclosure in Item 2 hereof.

Item 8.           Identification and Classification of Members of the Group:

                  This Item 8 is not applicable.

Item 9.           Notice of Dissolution of Group:

                  This Item 9 is not applicable.

Item 10.          Certification:

                  By signing below each of the Reporting Persons certifies that,
to the best of their knowledge and belief, the securities referred to above were
not  acquired and are not held for the purpose of or with the effect of changing
or influencing the control of the issuer of the securities and were not acquired
and are not  held in  connection  with or as a  participant  in any  transaction
having that purpose or effect.


                                                               Page 7 of 9 Pages

                                    SIGNATURE

         After  reasonable  inquiry and to the best of my knowledge  and belief,
the  undersigned  certifies that the  information set forth in this statement is
true, complete and correct.

Date: July 10, 2006                       KINGDON CAPITAL MANAGEMENT, LLC


                                          By:   /s/ William Walsh
                                                -------------------------------
                                          Name:  William Walsh
                                          Title: Chief Financial Officer

Date: July 10, 2006                       MARK KINGDON


                                          /s/ Mark Kingdon
                                          -------------------------------------



                                                               Page 8 of 9 Pages

                                  EXHIBIT INDEX


Ex.                                                                Page No.
---                                                                --------

A.       Joint Filing Agreement,  dated July 10, 2006 by and
         among  Kingdon  Capital  Management,  LLC and  Mark
         Kingdon..........................................            9



                                                               Page 9 of 9 Pages

                                    EXHIBIT A

                             JOINT FILING AGREEMENT

         The  undersigned  hereby agree that the  statement on Schedule 13G with
respect to the common stock of Maxwell  Technologies,  Inc. dated as of July 10,
2006 is, and  any amendments  thereto  (including  amendments  on  Schedule 13D)
signed  by each of the  undersigned  shall  be,  filed on  behalf  of each of us
pursuant to and in accordance  with the  provisions  of Rule 13d-1(k)  under the
Securities Exchange Act of 1934, as amended.

Date: July 10, 2006                       KINGDON CAPITAL MANAGEMENT, LLC


                                          By:   /s/ William Walsh
                                                -------------------------------
                                          Name:  William Walsh
                                          Title: Chief Financial Officer

Date: July 10, 2006                       MARK KINGDON


                                          /s/ Mark Kingdon
                                          -------------------------------------