Managing Power 3-3Battery PackThe battery pack is the internal power source for the computer. It isrechargeable using the AC adapter.The operating time of a fully charged battery pack depends on how youare using the computer. When your applications often access peripherals,you will experience a shorter operating time.NOTE: Care and maintenance information for the battery is provided in the “BatteryPack Guidelines” section in Chapter 7.Charging the Battery PackNOTE:z Charging will not start if the battery’s temperature is below 0 °C (32 °F) or above60 °C (140 °F).z The charging process will stop and the Battery Charge Indicator flashes greenwhen the battery’s temperature gets above 60 °C (140 °F). If this happens, thebattery pack may be damaged. Please contact your dealer.z During charging, do not disconnect the AC adapter before the battery has been fullycharged; otherwise you will get a prematurely charged battery.To charge the battery pack, connect the AC adapter to the computer andan electrical outlet. The Battery Charge Indicator ( ) on the computerglows yellow to indicate that charging is in progress. You are advised tokeep the computer power off while the battery is being charged. When thebattery is fully charged, the Battery Charge Indicator is off.It takes approximately 3 hours to fully charge the Li-Ion battery packwhen the computer is off, and approximately 6 hours to fully charge theLi-Ion battery pack when the computer is on.CAUTION: After the computer has been fully recharged, do not immediately disconnectand reconnect the AC adapter to charge it again. Doing so may damage the battery.NOTE: The battery level may automatically lessen due to the self-discharge process(0.21 % per day), even when the battery pack is fully charged (100 %). This happens nomatter if the battery pack is installed in the computer.