• Battery Rechargeable Li-polymer • Color Black• Dimensions (L x W x H) 67 x 118 x 8mm / 2.6 x 4.6 x 0.3in• Weight 105g (3.5oz)• Input 5V 1.0A (Micro USB) • Output 5V 2.1A (Type-A USB) • Power Bank 4200 mAh • Note ADATA Power Banks adopt rechargeable lithium batteries (Li-ion/Li-polymer), and the value of rated capacities are affected by ambient temperature, testing conditions and methods. The noted rated capacities of ADATA Power Banks are all tested and approved by a third party test lab. (The available capacity decreases gradually with the number of use increasing due to the battery characteristics.)