Ballard Power Systems Announces First Quarter 2004 Conference Call

VANCOUVER, British Columbia--April 29, 2004--Ballard Power Systems (TSX: BLD) will hold a conference call to discuss its first quarter results on Friday, May 7, 2004 at 7:00 a.m. PDT (10:00 a.m. EDT).

Access to the call may be obtained by calling the operator at (416) 640-1907 prior to the scheduled start time. A playback version of the call will be available for 24 hours after the call at (416) 640-1917. The confirmation number to access the playback is 21042031#. The audio web cast will be archived for replay on Ballard's web site at www.ballard.com.

Ballard Power Systems is recognized as the world leader in developing, manufacturing and marketing zero-emission proton exchange membrane fuel cells. Ballard is commercializing fuel cell engines for transportation applications and fuel cell systems for portable and stationary products. Ballard is also commercializing electric drives for fuel cell and other electric vehicles and power conversion products, and is a Tier 1 automotive supplier of friction materials for power train components. Ballard's proprietary technology is enabling automobile, bus, electrical equipment, portable power and stationary product manufacturers to develop environmentally clean products for sale. Ballard is partnering with strong, world-leading companies, including DaimlerChrysler, Ford, EBARA, ALSTOM and FirstEnergy, to commercialize Ballard(R) fuel cells. Ballard has supplied fuel cells to Honda, MGE UPS SYSTEMS, Mitsubishi, Nissan and Volkswagen, among others.

Ballard, the Ballard logo and Power to Change the World are registered trademarks of Ballard Power Systems Inc.