Featuresr 500 times unimpeded cyclic charge discharge and still keep 80 power storager dual usb ports 5v1000mah and 5v2100mah for fast output charging simultaneously 2 equipmentsr adopt advanced intelligent protective core to avoid harms caused from overflow current overcharge under voltage min load overload short circuit and also to provide testing function of load current quantity of powerr smart indicator showing real time power condition of electricity charged or discharged