4 links
Capacitors: What Good Are They?
illiamson-labs.com
Short description of a fundamental capacitor, and units used to measure capacitance. Illustrations of capacitors in electronic circuits, with animation.
Maxwell Technologies - Ultracapacitor Overview
maxwell.com
PowerCache ultracapacitors claim up to 100 times the energy of conventional capacitors and ten times the power of ordinary batteries.
Tavrima Canada Ltd.
tavrima.com
Largest and most powerful supercapacitors. New energy storage technology suited for uses needing repeated bursts of power for fractions of a second to several minutes.