This high capacity, fast charge (2x faster as well as a wall charge) powerbank 6700 mAh provides up to 48 hours extra of talk or surf time. Compatibility with all USB-powered devices. Thanks to the dual charge technology, you can simultaneously charge both the external battery and your device. Plus, with the LED indication light, can always check how much energy is left. This battery has 10 safety features flight approved. The powerbank is designed to provide up to 3 charges for your phone !