The myCharge STYLEPOWER - Black Dots is a Rechargeable 2200mAh battery with Smart-sense, which ensures complete device compatibility. It also has Max-power, which is maximum power transfer from powerbank (charger) to device. It is a High-denisty battery: the smallest and lightest powerbank and is Safe-Cell, which means it provides the highest level of battery safety. 1) Up to 1x Extra Battery, 2) USB port delivers 1.0A output, 3) 1.0A input, 4) Integrated USB cable for easy recharging