NO BATTERY REQUIRED, JUST SHAKE!
Powered by the principle of Faraday’s Law, the mini shake light flashlight uses a magnet surrounded by a copper coil which induces voltage in the coil when the flashlight is shaken. This revolutionary flashlight uses a long life LED bulb to provide up to 5 minutes of light visible up to a mile after just 30 seconds of shaking. The shock-resistant waterproof case is virtually indestructible and will even float. Features: (1) Super bright white LED bulb (2) Never needs batteries, never needs bulbs, maintenance free (3) Save money – never have to buy batteries (4) 100% Waterproof case & even floats in water (5) Light visible for up to one mile Great for cars, boats, campers, homes, cottages and all emergency kits (6) 30 seconds of shaking powers LED for up to 5 minutes (7) Dimensions 7-1/8" x 1-1/4"