User's Manual

43
Battery Pack
Your computer has two battery packs. The battery pack is the internal
power source for the computer. It is rechargeable using the AC adapter.
CAUTION: Always keep both battery packs installed, especially when the
computer is running on battery power. A battery pack can be removed only
when it is not being charged/discharged or if you are hot-swapping the
battery pack.
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 battery’s temperature is outside the
allowed range, which is between 0 °C (32 °F) and 50 °C (122 °F). Once the
temperature meets the requirements, charging automatically resumes.
 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 Charge Indicator glows green.
The two battery packs are charged in parallel. It takes approximately 5 hours
to fully charge the two battery packs when the power is off and approximately
6 hours when the power is on (may need a longer charging time at lower
temperatures).