AUSTIN, Texas, April 15 /PRNewswire-FirstCall/ -- In conjunction with Active Power's (Nasdaq: ACPW) First Quarter 2002 financial results release, you are invited to listen to its conference call that will be broadcast live over the Internet on April 18, 2002 at 10:00 a.m. Central Time/ 11:00 a.m. Eastern Time with Joe Pinkerton, Dave Gino, and Bob Gray of Active Power.

What: Active Power's First Quarter 2002 Financial Review Conference Call
When: 11:00 a.m. EDT, Thursday, April 18, 2002
Where: http://www.videonewswire.com/event.asp?id=4046 or via the Investor Relations page on http://www.activepower.com/investor_relations/index.html
How: Simply log on to the web at the address above

The call will be archived on the web site http://www.activepower.com . To access the replay, click on investor relations. The call will also be archived at http://www.prnewswire.com . (Minimum Requirements to listen to broadcast: The WindowsMedia Player software, downloadable free from http://www.microsoft.com/windows/windowsmedia/EN/default.asp , and at least a 28.8Kbps connection to the Internet. If you experience problems listening to the broadcast, send an email to isproducers@prnewswire.com .)

About Active Power:
Active Power, Inc. (http://www.activepower.com ) designs, manufactures and markets battery-free power quality products that provide the consistent, reliable electric power required by today's digital economy. Active Power is the first company to commercialize a flywheel energy storage system, CleanSource(R) that provides a highly reliable, low-cost and non-toxic replacement for lead-acid batteries used in conventional power quality installations. Through a strategic alliance, Active Power and Caterpillar Inc. jointly developed a battery-free uninterruptible power supply (UPS), which is marketed under the Caterpillar brand name.