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After several years, when the lithium battery starts to weaken, the system
settings stored in CMOS RAM, such as the date and time, may be wrong.
When this occurs, you need to replace the lithium battery.
To run the Setup utility, press F3 when your computer is starting up.
Then press F1 to run the BIOS setup utility.
Write down the current BIOS Setup options.
Shut down your computer and turn off all peripheral devices, such as
your printer, display, and speakers. Unplug your computer.
Remove the left-side and bottom panels, as described on pages 63
through 64, respectively.
Install the new battery with the plus (+) side up.
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