Exhibit 99.1

   Ultralife Batteries, Inc. Notified of Protest Concerning BA-5347
                      Military Battery Contracts

    NEWARK, N.Y.--(BUSINESS WIRE)--March 21, 2005--Ultralife
Batteries, Inc., (NASDAQ:ULBI) has been notified by the Department of
Defense that on March 14, a U.S.-based battery assembly company, one
of the offerors to the Government's BA-5347/U battery contract
solicitation, filed a protest with the Government claiming that the
contracts were improperly awarded. The Government is required to
respond within 90 days after a protest has been filed and no further
action is required on Ultralife's part.
    "As we previously noted in response to the still-pending Next Gen
II, Phase IV contract protest, the Government will not participate in
any work that is performed while the protest is being reviewed," said
John D. Kavazanjian, president and chief executive officer of
Ultralife. "We do not anticipate the protest having an effect on our
qualification schedule for the BA-5347 battery, which we expect to
complete before the end of 2005 as originally planned."

    About Ultralife Batteries, Inc.

    Ultralife is a global provider of power solutions for diverse
applications. The company develops, manufactures and markets a wide
range of non-rechargeable and rechargeable batteries, charging systems
and accessories for use in military, industrial and consumer portable
electronic products. Through its range of standard products and
engineered solutions, Ultralife is able to provide the next generation
of power systems. Industrial, retail and government customers include
General Dynamics, Philips Medical Systems, Energizer, Kidde Safety,
Lowe's, 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 facility, is located in Abingdon, U.K.
Both facilities are ISO-9001 certified.

    This press release contains 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: loss of business with the U.S.
government, worsening global economic conditions, world events,
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.

    Detailed information on Ultralife is available at the Company's
Web site, www.ultralifebatteries.com.

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

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