A useful battery case protects the device from scratches and quick discharges. Use it as a back cover and power bank at the same time. The cover is ideally suited to the device, and it has all the necessary slots for the ports, the camera, speakers. Perfectly adapted to the smartphone. The sleek design and robust design of the PC and TPU makes the power bank useful. It is equipped with a battery level indicator. Specification: Battery: Lithium Polymer Connector: lightning Capacity: 3000 mAh Input: 5V-1000 mA Output: 5V- 1000 mA Charging time: 3-4 hours Dimensions: 143x73x13,5 mm NOTE! Nominal capacity expressed in mAh (milliampere hours) means the sum of all cells that were used in the power bank. The cells used have a voltage of 3.6 - 3.7V, while the standard USB port - 5V, so voltage conversion is necessary, which in turn translates into real capacity. After conversion, it is usually around 65-67% of the original value. This means that for a power bank with a capacity of 12,000 mAh, in fact about 8,000 mAh is available.