UNITED STATES
SECURITIES AND 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

(Title of Class of Securities)

577767-10-6
 (CUSIP Number)

November 30, 2004

(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
/x / Rule 13d-1(b)
/ / 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).
Page 1
of 8 Pages

SCHEDULE 13G

CUSIP NO. 577767-10-6                                         Page 2 of 8 Pages

-------------------------------------------------------------------------------
 (1) NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Smith Barney Fund Management LLC
-------------------------------------------------------------------------------
 (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

                                                                       (a)  / /
                                                                       (b)  / /
-------------------------------------------------------------------------------
 (3) SEC USE ONLY

-------------------------------------------------------------------------------
 (4) CITIZENSHIP OR PLACE OF ORGANIZATION                              Delaware

-------------------------------------------------------------------------------
       NUMBER OF           (5) SOLE VOTING POWER                              0

        SHARES
                           ----------------------------------------------------
     BENEFICIALLY          (6) SHARED VOTING POWER                     889,389*

       OWNED BY
                           ----------------------------------------------------
        EACH               (7) SOLE DISPOSITIVE POWER                         0

      REPORTING
                           ----------------------------------------------------
       PERSON              (8) SHARED DISPOSITIVE POWER                889,389*

        WITH:
-------------------------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON       889,389*

-------------------------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE
     INSTRUCTIONS)  / /

-------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)                    6.1%*

-------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)                             IA

-------------------------------------------------------------------------------
* Includes shares for which the reporting person disclaims beneficial
  ownership. See Item 4(a).	

SCHEDULE 13G

CUSIP NO. 577767-10-6                                         Page 3 of 8 Pages

-------------------------------------------------------------------------------
 (1) NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Citigroup Global Markets Holdings Inc.
-------------------------------------------------------------------------------
 (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

                                                                       (a)  / /
                                                                       (b)  / /
-------------------------------------------------------------------------------
 (3) SEC USE ONLY

-------------------------------------------------------------------------------
 (4) CITIZENSHIP OR PLACE OF ORGANIZATION                              New York

-------------------------------------------------------------------------------
       NUMBER OF           (5) SOLE VOTING POWER                              0

        SHARES
                           ----------------------------------------------------
     BENEFICIALLY          (6) SHARED VOTING POWER                   1,461,569*

       OWNED BY
                           ----------------------------------------------------
        EACH               (7) SOLE DISPOSITIVE POWER                         0

      REPORTING
                           ----------------------------------------------------
       PERSON              (8) SHARED DISPOSITIVE POWER              1,461,569*

        WITH:
-------------------------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     1,461,569*

-------------------------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE
     INSTRUCTIONS)  / /

-------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)                   10.1%*

-------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)                             HC

-------------------------------------------------------------------------------
* Includes shares for which the reporting person disclaims beneficial
  ownership. See Item 4(a).	

SCHEDULE 13G

CUSIP NO. 577767-10-6                                         Page 4 of 8 Pages

-------------------------------------------------------------------------------
 (1) NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Citigroup Inc.
-------------------------------------------------------------------------------
 (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

                                                                       (a)  / /
                                                                       (b)  / /
-------------------------------------------------------------------------------
 (3) SEC USE ONLY

-------------------------------------------------------------------------------
 (4) CITIZENSHIP OR PLACE OF ORGANIZATION                              Delaware

-------------------------------------------------------------------------------
       NUMBER OF           (5) SOLE VOTING POWER                              0

        SHARES
                           ----------------------------------------------------
     BENEFICIALLY          (6) SHARED VOTING POWER                   1,461,569*
                                                                             **
       OWNED BY
                           ----------------------------------------------------
        EACH               (7) SOLE DISPOSITIVE POWER                         0

      REPORTING
                           ----------------------------------------------------
       PERSON              (8) SHARED DISPOSITIVE POWER              1,461,569*
                                                                             **
        WITH:
-------------------------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     1,461,569*
                                                                             **

-------------------------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE
     INSTRUCTIONS)  / /

-------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)                   10.1%*
                                                                             **

-------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)                             HC

-------------------------------------------------------------------------------
*  Includes shares for which the reporting person disclaims beneficial
   ownership. See Item 4(a).
** Includes shares held by the other reporting persons.	

Item 1(a). Name of Issuer:
Maxwell Technologies, Inc.
Item 1(b). Address of Issuer's Principal Executive Offices:
9244 Balboa Avenue
San Diego, California 92193
Item 2(a). Name of Person Filing:
Smith Barney Fund Management LLC ("SB Fund") Citigroup Global Markets Holdings Inc. ("CGM Holdings") Citigroup Inc. ("Citigroup")
Item 2(b). Address of Principal Office or, if none, Residence:
The address of the principal office of SB Fund is:
333 West 34th Street
New York, NY 10001
The address of the principal office of CGM Holdings is:
388 Greenwich Street
New York, NY 10013
The address of the principal office of Citigroup is:
399 Park Avenue
New York, NY 10043
Item 2(c). Citizenship or Place of Organization:
SB Fund is a Delaware limited liability company.
CGM Holdings is a New York corporation.
Citigroup is a Delaware corporation.
Item 2(d). Title of Class of Securities:
Common Stock
Item 2(e). CUSIP Number:
577767-10-6
Page 5
of 8 Pages

Item 3. If This Statement Is Filed Pursuant to Sections 240.13d-1(b) or
240.13d-2(b) or (c), Check Whether the Person Filing Is a(n):
(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d) [ ] Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e) [X] Investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E);
(f) [ ] Employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F);
(g) [X] Parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G);
(h) [ ] Savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i) [ ] Church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3)
(j) [ ] Group, in accordance with Section 240.13d-1(b)(1)(ii)(J).
Item 4. Ownership. (as of November 30, 2004)
(a) Amount beneficially owned: See item 9 of cover pages
(Includes shares for which the reporting person disclaims beneficial ownership.)
(b) Percent of class: See item 11 of cover pages
(c) Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
(ii) Shared power to vote or to direct the vote:
(iii) Sole power to dispose or to direct the disposition of:
(iv) Shared power to dispose or to direct the disposition of:
See Items 5-8 of cover pages
Page 6
of 8 Pages

Item 5. Ownership of Five Percent or Less of a Class.
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ].
Item 6. Ownership of More Than Five Percent on Behalf of Another Person.
Not Applicable.
Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
CGM Holdings is the sole member of SB Fund. Citigroup is the sole stockholder of CGM Holdings.
Item 8. Identification and Classification of Members of the Group.
Not Applicable.
Item 9. Notice of Dissolution of Group.
Not Applicable.
Page 7
of 8 Pages

Item 10. Certification.
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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.
SIGNATURE.
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Dated: December 9, 2004
SMITH BARNEY FUND MANAGEMENT LLC

By: /s/ Thomas C. Mandia
   --------------------------------------------
   Name:  Thomas C. Mandia
   Title:  Secretary	

CITIGROUP GLOBAL MARKETS HOLDINGS INC.

By: /s/ Serena D. Moe
   --------------------------------------------
   Name:  Serena D. Moe
   Title:  Assistant Secretary	

CITIGROUP INC.

By: /s/ Serena D. Moe
   --------------------------------------------
   Name:  Serena D. Moe
   Title:  Assistant Secretary	

Page 8
of 8 Pages

EXHIBIT INDEX TO SCHEDULE 13G

EXHIBIT 1
Agreement among SB Fund, CGM Holdings and Citigroup as to joint filing of Schedule 13G

EXHIBIT 1

AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G
Each of the undersigned hereby affirms that it is individually eligible to use Schedule 13G, and agrees that this Schedule 13G is filed on its behalf.
Date: December 9, 2004
SMITH BARNEY FUND MANAGEMENT LLC

By: /s/ Thomas C. Mandia
   --------------------------------------------
   Name:  Thomas C. Mandia
   Title:  Secretary	

CITIGROUP GLOBAL MARKETS HOLDINGS INC.

By: /s/ Serena D. Moe
   --------------------------------------------
   Name:  Serena D. Moe
   Title:  Assistant Secretary	

CITIGROUP INC.

By: /s/ Serena D. Moe
   --------------------------------------------
   Name:  Serena D. Moe
   Title: Assistant Secretary