... convenient, affordable, business, travel to go out for a portable power supply! Also available for the player, ... problems. 1: 5.0V, charging voltage 2, the charging current: 500mA3: 2200mAh, battery capacity 4, the output voltage: 5.5V ( maximum ) 5, the output current: 700mAh ( ... , 6 control switch: switch.Application fields:Applies to the charging voltage in the range of 5.5V digital mobile equipment ...