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Replacing the backup battery
In addition to its main battery, your computer has a small backup battery that
maintains the contents of RAM while you replace the main battery.
The backup battery usually lasts for several years. You may need to have it
replaced if you notice that some of your system settings changed after you
removed or replaced the main battery. (You may notice, for example, that the
clock time is different.) By replacing the backup battery you can preserve the
contents of RAM the next time you change the main battery.
Your computer’s backup battery must be replaced by an Apple-authorized
service provider.
Reconditioning the battery
To maximize battery life, you should recondition the battery once every
30 days.
If you own a PowerBook Duo 280 or 280c
If you have a PowerBook Duo 280 or 280c, you can extend your battery’s life
by reconditioning your battery once every 30 days using the Battery
Reconditioning program, which is on the system software disk labeled Disk
To o ls . You may want to keep a copy of the Battery Reconditioning program on
your hard disk so it is more convenient to use every 30 days.
IMPORTANT
It takes 2 hours to run the Battery Reconditioning program and
about 2 hours to fully charge your battery in your PowerBook. During the
time you are reconditioning your battery (and recharging it if you don’t have a
recharger), you cannot use your PowerBook. Plan to recondition your battery
when you won’t need your PowerBook for at least 4 hours.
To recondition a battery, follow these steps:
1Plug in your PowerBook using your AC power adapter.
If you have already copied the Battery Reconditioning program on your hard
disk, skip step 2 and do step 3 next.
2 Insert
Disk Tools
in the floppy disk drive and turn on your PowerBook.
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Power Management