The cells' compact, 650-F ultracapacitor serves as an alternative to batteries for applications including hybrid-drive systems, idle stop-start, and power-network stabilization. The ultracapacitors deliver up to 10 the power and longevity of batteries, need no maintenance, and operate reliably in extreme temperatures. Units for automotive applications come encased in a rugged, splashproof aluminum chassis.

Maxwell Technologies Inc., 9244 Balboa Ave., San Diego, CA 92123, (858) 503-3300,