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Hardware and Software Guide 3–27
How to Calibrate
To calibrate a battery pack, you must fully charge, fully
discharge, and then fully recharge the battery pack.
Step 1: Charging the Battery Pack
Charge the battery pack while the computer is on. To charge the
battery pack:
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WARNING: Do not charge the computer battery pack onboard
aircraft. Charging the battery pack may damage aircraft electronic
systems.
1. Insert the battery pack into the computer.
2. Connect the computer to the AC adapter, an optional power
adapter, or an optional expansion product, and then plug the
adapter or device into external power. (The computer battery
light is turned on.)
3. Leave the computer connected to external power until the
battery pack is fully charged. (The computer battery light is
turned off.)
Step 2: Discharging the Battery Pack
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CAUTION: To prevent loss of information, save your work before
beginning an unattended discharge procedure.
The computer must remain on throughout the discharge
process. The battery pack can discharge whether or not you are
using the computer, but the battery pack will discharge faster if
the computer is in use.