User's Manual

39
Battery Pack
The battery pack is the internal power source for the computer. It is rechargeable
using the AC adapter.
NOTE: Care and maintenance information for the battery is provided in the
“Battery Pack Guidelines” section in Chapter 7.
Charging the Battery Pack
NOTE:
 Charging will not start if the internal temperature of the battery pack is below 0
°C (32 °F) or above 50 °C (122 °F); the charging process will stop if the
internal temperature of the battery pack gets above 60 °C (140 °F). To avoid
damaging the battery under this situation, disconnect the AC adapter and wait
for the battery to return to room temperature before charging again.
 During charging, do not disconnect the AC adapter before the battery has
been fully charged; otherwise you will get a prematurely charged battery.
 The battery has a high temperature protection mechanism which limits the
maximum charge of the battery to 80% of its total capacity in the event of high
temperature conditions. In such conditions, the battery will be regarded as
fully charged at 80% capacity.
 The battery level may automatically lessen due to the self-discharge process,
even when the battery pack is fully charged. This happens no matter if the
battery pack is installed in the computer.
To charge the battery pack, connect the AC adapter to the computer and an
electrical outlet. The Battery Indicator ( ) on the computer glows amber to
indicate that charging is in progress. You are advised to keep the computer power
off while the battery is being charged. When the battery is fully charged, the
Battery Indicator lights green.
The two battery packs are charged in parallel. It takes approximately 5 hours (for
Standard Models) or 8 hours (for Expansion Unit Models) to fully charge the two
battery packs.
CAUTION: After the computer has been fully recharged, do not immediately
disconnect and reconnect the AC adapter to charge it again. Doing so may
damage the battery.