Portable rechargeable battery• 20000 mAh rechargeable Li-Pol battery.• Protection from over-charging, over-discharging, overload and short circuit.• Automatic turn on/off. Just plug your device(s) into RIVACASE battery output socket(s) and the charging will start.• To check the battery status, press the button on the battery body. 4 LED indicators will show the remaining power.• Smartphone charging - up to 6 times (depends on a smartphone battery capacity).• Cable included.