Battery Packs
Hardware Guide 3–3
Charging a Battery Pack
The battery pack automatically charges when the notebook is
connected to external power through an AC adapter. The
battery pack charges whether the notebook is powered off or in
use, but it charges faster when the notebook is powered off. When
the notebook is in use, charging will take longer, depending on
system activity.
The battery light on the notebook stays on while the battery pack
is charging. The light turns off when the battery is fully charged.
Identifying the battery light
Obtaining Accurate Charge Information
Charging the battery pack prolongs battery life and increases the
accuracy of the battery gauge. When charging the battery:
■ Allow the battery pack to fully discharge before charging it.
■ Charge the battery pack fully. Even a new battery pack can
display charge information inaccurately if it has not been
charged fully.
■ Fully charging and discharging the battery pack will reduce
the need for battery calibration.
■ A battery pack in a notebook that has been idle for over
one month might need calibrating. See “Calibrating a Battery
Pack” in this chapter for details.
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