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
Reconditioning the battery
To maximize battery life, you should recondition the battery once every
30 days, using the Battery Reconditioning program. You can find this program in the Utilities folder on your hard disk, and also on the system software floppy disk labeled Disk Tools. Keep the Battery Reconditioning program on your hard disk so it is convenient to use every 30 days.
IMPORTANT It takes 2 hours to run the Battery Reconditioning program and another 2 hours to fully charge your battery in your Macintosh 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:
1Make sure your PowerBook is connected to a power source.
2Turn on your PowerBook.
