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Startup and Reference Guide—Part 2 4–21
Calibrating a Battery Pack
When to Calibrate
Even if a battery pack is heavily used, it should not be necessary
to calibrate it more than once a month. It is not necessary to
calibrate a new battery pack before first use. Calibrate the battery
pack under the following conditions:
■ When battery charge displays seem inaccurate.
■ When you observe a significant change in battery run time.
■ When the battery pack has not been used for one month
or more.
How to Calibrate
To calibrate a battery pack, you must fully charge, fully
discharge, then fully recharge the battery pack.
Charging the Battery Pack
Charge the battery pack while the notebook is in use. To charge
the battery pack:
1. Insert the battery pack into the notebook. For instructions,
refer to “Replacing a Battery Pack” later in this chapter.
2. Connect the notebook to external power. (The battery light is
on as the battery pack charges.)
3. Leave the notebook connected to external power until the
battery pack is fully charged. (The battery light turns off.)
Discharging the Battery Pack
Hibernation is enabled by default, but can be disabled. Before you
begin the full discharge, disable Hibernation. To disable
Hibernation, select Start > Control Panel > Performance and
Maintenance > Power Options > Hibernate tab. Then clear the
Enable Hibernation check box.