Liberty Mountain Self-Generating LED Flashlight
Here's what other sites are saying:
Shaking flashlight for about 30 seconds allows a magnet to pass through a wire coil and charge a capacitor to power the light for 5 minutes or until shaken again. 2 lithium 1.3 volt batteries are used for power when capacitor is not charged. Brighter than competing products. The L.E.D. bulb will last a lifetime. Sold individually.