Power
Hardware and Software Guide 3–23
■ When battery charge displays report large changes in the
percent of power remaining within 2 minutes. For example,
if
the Windows Power Meter displays 20 percent of a full
charge remaining and then less than 2 minutes later displays
only 5
percent of a full charge remaining, the rapid drop in
charge remaining indicates that the battery pack needs
calibration.
For more information about battery charge displays, refer to
the
“Monitoring the Charge in a Battery Pack” section earlier
in this chapter.
How to Calibrate
To calibrate a battery pack, you must fully charge, fully
discharge, and then fully recharge the battery pack while the
notebook is in Windows.
Charging the Battery Pack
Charge the battery pack while the notebook is on. To charge the
battery pack:
Å
WARNING: Do not charge the notebook battery pack onboard
aircraft. Charging the battery pack may damage aircraft electronic
systems.
1. Insert the battery pack into the notebook.
2. Connect the notebook to external power through the
AC
adapter or an optional combination power adapter. (The
notebook 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 notebook battery light is
turned off.)
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