EXHIBIT 99.1

  Ultralife Batteries, Inc. Receives $6 Million U.S. Army Battery Order

    NEWARK, N.Y.--(BUSINESS WIRE)--April 27, 2004--Ultralife
Batteries, Inc. (Nasdaq:ULBI) has received an order valued at $6
million from the U.S. Army Communications and Electronics Command
(CECOM) for its BA-5372/U military batteries. The order represents the
sixth production release within a year, totaling over $16 million in
releases under the $32 million NextGen II, 5-year Small Cylindrical
Battery contract. Deliveries are expected to begin late this year and
continue throughout 2005.
    John D. Kavazanjian, Ultralife's president and chief executive
officer, said, "The Next Gen II Small Cylindrical Battery contract has
provided for a steady stream of orders for us since we received it in
2002. We have increased our production based on requests for
accelerated deliveries, and anticipate receiving additional orders
over the remaining life of the contract through 2007 for the BA-5372
battery, which has been in very high demand."
    NextGen II is CECOM's five-year acquisition strategy with
production contracts awarded to provide three types of primary
(non-rechargeable) lithium-manganese dioxide batteries to the U.S.
Army. The three battery types -- BA-5372/U, BA-5367/U and BA-5368/U --
comprise the Small Cylindrical Cell Lithium Manganese Dioxide Battery
Group. A major objective of this five-year acquisition strategy is to
establish and maintain a domestic production base of a sufficient
capacity to timely meet peacetime demands and have the ability to
surge quickly to meet deployment demands.
    The BA-5372/U battery is used for memory backup primarily for the
AN/PRC-119 MANPACK Single Channel Ground and Airborne Radio System
(SINCGARS), and in numerous other applications including encryption
and cryptographic devices, and the Patriot Missile System.

    About Ultralife Batteries, Inc.

    Ultralife is a leading developer, manufacturer, and marketer of
standard and customized lithium primary (non-rechargeable), lithium
ion and lithium polymer rechargeable batteries. Ultralife's
high-energy batteries use advanced lithium technology and are used in
military, industrial and consumer portable electronic products.
Through its range of standard products and ability to customize for a
wide range of applications, Ultralife is able to provide the next
generation of battery solutions. OEM, retail and government customers
include Energizer, Kidde Safety, Philips Medical Systems, Radio Shack
and the national defense agencies of the United States and United
Kingdom, among others.
    Ultralife's headquarters, principal manufacturing and research
facilities are in Newark, New York, near Rochester. Ultralife (UK)
Ltd., a second manufacturing and research facility, is located in
Abingdon, U.K. Both facilities are ISO-9001 certified.

    This press release may contain forward-looking statements based on
current expectations that involve a number of risks and uncertainties.
The potential risks and uncertainties that could cause actual results
to differ materially include: worsening global economic conditions,
increased competitive environment and pricing pressures, disruptions
related to restructuring actions and delays. Further information on
these factors and other factors that could affect Ultralife's
financial results is included in Ultralife's Securities and Exchange
Commission (SEC) filings, including the latest Annual Report on Form
10-K.

    Note to Editors: Photos for the battery and application mentioned
in this release, and other Ultralife military batteries are available
at: http://www.ultralifebatteries.com/milphoto.asp

    Ultralife(R) is a registered trademark of Ultralife Batteries,
Inc.


    CONTACT: Ultralife Batteries, Inc.
             Peter Comerford, 315-332-7100
             pcomerford@ulbi.com
                 or
             Investor Relations Contact:
             Lippert/Heilshorn & Associates, Inc.
             Jody Burfening, 212-838-3777
             jburfening@lhai.com
                 or
             Media Contact:
             Lippert/Heilshorn & Associates, Inc.
             Chenoa Taitt, 212-201-6635
             ctaitt@lhai.com