LED Cranking Flashlight Y-1501 The flashlight never need a battery. It is charged by shaking the unit. Never let you down. At home, in the car, in your camp or boat or storm emergency kit, it is always ready, even if you havent used or checked it for years. 1minute of shaking will give up to about 30 minutes of continuous bright light. FUNCTIONS: 1. Shaking as recharge power 2. No battery or power needed, environmental wind-up white light 3. Shake it for one minute, and it will keep working for 10 minutes 4. Lightweight, convenient for traveling use 5. One LED white light 6. Free of maintenance GW/NW: 5.5kg/5kg Packing:40pcs/ctn Carton size: 38 x 25 x 20.5cm