Handy Pocket Size Crank LED flashlight, Dynamo Flashlight, LED torch, wind up LED torch . ... . . Battery voltage: 3. 6V, capacity: 40mAH. . Rotate 120 cycles/minute, output power is about 0. 8W. . In normal status, rotate 130cycles ... : 84 * 51.2 *31.6 mm. Weight: 69.2 g. Hand-Crank power, no dry battery or bulb required LED Mini Dynamo ...