... -ion/polymerCapacity: 21600 mAh/3.7VOutput voltage: 5V, 7.4V, 9V, 12V, 16V, 19VOutput current: 1~4.2AInput voltage: 13V~19VInput ... value, flash among 5V, 7.4V, 9V ,12V ,16V, 19V, select the voltage which complies to battery of device or charger's ... well, but which is not applicable to at 5V.5. Charging: Please use the specified adapter to connect with power supply of laptop ...