1) Shaking it for 10 seconds, it keeps working for 15-20 minutes 2) No battery inside the flashlight 3) There is a big capacitor inside to keep power from shaking and supply power 4) Waterproof 5) LxW:17x5.3cm Packing:1pcs/color box ... - Update: 2007-05-03

Features: 1) Material: ABS 2) 2 LED light 3) LxWxH: 10 x 5 x 2.5cm 4) Hand pressing charger for electricity 5) Exquisite and easy to carry for travel or emergency usage 6) It is indispensable in every home, car and outdoor situation Inner... - Update: 2007-05-03