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

                                   FORM 12b-25

                           NOTIFICATION OF LATE FILING

                                                  Commission file number 0-20852

(Check One):   |_| Form 10-K   |_|  Form 20-F   |_|  Form 11-K   |_|  Form 10-Q
               |_|  Form N-SAR

         For Period Ended: ______________________

|X| Transition Report on Form 10-K
|_| Transition Report on Form 20-F
|_| Transition Report on Form 11-K
|_| Transition Report on Form 10-Q
|_| Transition Report on Form N-SAR

         For the Transition Period Ended: December 31, 2002

  Read Attached Instruction Sheet Before Preparing Form. Please Print or Type.

      Nothing in this form shall be construed to imply that the  Commission  has
verified any information contained herein.

      If the  notification  relates to a portion of the  filing  checked  above,
identify the Item(s) to which the notification relates:

N/A

PART I -- REGISTRANT INFORMATION

Ultralife Batteries, Inc.
-------------------------
(Full Name of Registrant)

N/A
---
(Former Name if Applicable)

2000 Technology Parkway
-----------------------
(Address of Principal Executive Office (Street and Number))

Newark, New York 14513
----------------------
(City, State and Zip Code)

PART II -- RULES 12b-25(b) AND (c)

      If the subject  report could not be filed without  unreasonable  effort or
expense  and  the  registrant  seeks  relief  pursuant  to Rule  12b-25(b),  the
following should be completed. (Check box if appropriate.)

|X|   (a) The reasons  described in  reasonable  detail in Part III of this form
      could not be eliminated without unreasonable effort or expense;

|X|   (b) The subject annual report,  semi-annual  report,  transition report on
      Form 10-K, Form 20-F,11-K or Form N-SAR, or portion thereof, will be filed
      on or before the fifteenth calendar day following the prescribed due date;
      or the subject  quarterly  report or  transition  report on Form 10-Q,  or
      portion  thereof  will be  filed  on or  before  the  fifth  calendar  day
      following the prescribed due date; and

|_|   (c) The accountant's statement or other exhibit required by Rule 12b-25(c)
      has been attached if applicable.


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PART III -- NARRATIVE

      State below in reasonable  detail the reasons why Forms 10-K,  20-F, 11-K,
10-Q, N-SAR, or the transition report portion thereof, could not be filed within
the prescribed time period.

      The Company is preparing a  Transition  Report on Form 10-K for the period
ended  December 31, 2002. On February 26, 2003,  the Company  disclosed  that it
would likely need to restate  certain  prior period  financial  statements  as a
result of the manner in which it had accounted for its equity  investment in its
affiliate, Ultralife Taiwan, Inc. (UTI). The Company, along with its independent
accountants,  sought  concurrence  from  the SEC for the  appropriate  treatment
related to this complex  accounting  issue. The Company has reached a conclusion
on this issue,  and the SEC  concurrence  was obtained on March 28,  2003.  As a
result,  the Company will be amending its previous  filings with the SEC for the
quarterly and annual  periods in its fiscal year ended June 30, 2002 and for the
quarterly  period ended  September 28, 2002.  As a result of the effort  arising
from this  process,  the Company  will require  additional  time to complete its
Transition  Report on Form 10-K. As noted in Part II, the Company will be filing
its  Transition  Report on Form 10-K on or before  the  fifteenth  calendar  day
following the prescribed due date.

PART IV -- OTHER INFORMATION

(1)  Name  and  telephone  number  of  person  to  contact  in  regard  to  this
notification

Robert W. Fishback
------------------
     (Name)

   (315)           332-7100
-----------   ------------------
(Area Code)   (Telephone Number)

(2) Have all other  periodic  reports  required under Section 13 or 15(d) of the
Securities  Exchange Act of 1934 or Section 30 of the Investment  Company Act of
1940  during  the  preceding  12  months  or for such  shorter  period  that the
registrant  was  required to file such  report(s)  been filed?  If answer is no,
identify report(s). |X| Yes |_| No

(3) Is it anticipated that any significant  change in results of operations from
the  corresponding  period for the last  fiscal  year will be  reflected  by the
earnings statements to be included in the subject report or portion thereof? |_|
Yes |X| No

      If so, attach an explanation of the anticipated  change,  both narratively
and  quantitatively,  and, if  appropriate,  state the reasons why a  reasonable
estimate of the results cannot be made.

                            Ultralife Batteries, Inc.
                            -------------------------
                  (Name of Registrant as Specified in Charter)

has  caused  this  notification  to be signed on its  behalf by the  undersigned
hereunto duly authorized.

Date March 31, 2003       By /s/ Robert W. Fishback
                            -----------------------

INSTRUCTION: The form may be signed by an executive officer of the registrant or
by any other duly  authorized  representative.  The name and title of the person
signing  the form  shall  be typed or  printed  beneath  the  signature.  If the
statement is signed on behalf of the registrant by an authorized  representative
(other than an executive officer), evidence of the representative's authority to
sign on behalf of the registrant shall be filed with the form.


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