44.2 Power Volume IndicationBattery is fully charged Battery is partially drained Battery is drainedNote: If the power volume indication of battery shows only one block or is empty, itindicates the power supply is obviously lacking, please charge the battery.4.3 Charging of BatteryYou can use the external power adapter to charge the battery. The charging can beperformed when the power of MP500 Player is on or off. The detailed charging method is asfollows:1) Load the chargeable battery supplied with this unit.2) Connect the power cable with the power adapter.3) Insert the DC plugs of power adapter into the DC input port of MP500 Player.4) Insert the power plug into the power socket.Note: Please don’t remove the battery during the charging process.4.4 Use of External Power AdapterYou can use external power adapter to supply directly power for MP500 Player. Theoperation method is the same with the battery charging method.5. Connection of External Interface