Output DC: 4.2 V / 0.65 A Colour: black Material: plastic Connection: 1x USB plug Weight: 58 g Dimensions (L x W x H): 11 x 4.3 x 4.1 cm LED charging indicator Protection against short circuits, overheating & overloading for safe charging process Compatible with the following device models: lithium button cell 17670 lithium button cell 14500 lithium button cell 18500 lithium button cell 18350 .