... , charging voltage 2, the charging current: 500mA3: 2200mAh, battery capacity 4, the output voltage: 5.5V ( maximum ) 5, the output current ... interface: USB interface ( 5.5V 700mA ).3, material: plastic. 4, LED color display: charging charging light red, green. 5, the charging LED ... lamp color display: red≤30%, orange≤30%-70%,green.≤70% , 6 control switch ...