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32 Using Batteries and Module Bay Devices
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Charging the Battery
NOTE: The AC adapter charges a completely discharged battery in approximately 1 hour with the
computer turned off. Charge time is longer with the computer turned on. You can leave the battery in the
computer as long as you like. The battery internal circuitry prevents the battery from overcharging.
When you connect the computer to an electrical outlet or install a battery while the computer is
connected to an electrical outlet, the computer checks the battery charge and temperature. If
necessary, the AC adapter then charges the battery and maintains the battery charge.
If the battery is hot from being used in your computer or being in a hot environment, the
battery may not charge when you connect the computer to an electrical outlet.
Disconnect the computer from the electrical outlet and allow the computer and the battery to
cool to room temperature. Then connect the computer to an electrical outlet to continue
charging the battery.
For more information on resolving problems with a battery, see "Power Problems" on page 35.
Removing a Battery
For more information about removing the second battery, see "About the Module Bay" on
page 36.
CAUTION: Before you begin any of the procedures in this section, read the safety instructions your
Product Information Guide.
CAUTION: Before performing these procedures, turn off the computer, disconnect it from the electrical
outlet, and disconnect the modem from the telephone wall jack.
NOTICE: If you choose to replace the battery with the computer in standby mode, you have up to
90 seconds to complete the battery replacement before the computer shuts down and loses any
unsaved data.
1
Ensure that the computer is turned off, disconnected from an electrical outlet, and
disconnected from the telephone wall jack.
2
If the computer is connected to a docking device (docked), undock it. See the documentation
that came with your docking device for instructions.
3
Slide and hold the battery-bay latch release on the bottom of the computer, and then remove
the battery from the bay.