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Maximizing the life of batteries
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If your PowerBook has one battery
If your PowerBook uses one battery, you can maximize the life of your
battery by discharging and then recharging it completely once every 90
days. Just use the computer as you normally would, but ignore the low-
power messages that appear on the screen. (Make sure to save your work,
however.) When the computer goes to sleep automatically after the final
warning, recharge the battery completely before using it again.
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If your PowerBook has two batteries
If you are using two batteries, swap the left and right batteries once a
month.
Your batteries will last longer if you recharge them at or slightly below room
temperature.
With proper care you can expect your batteries to last for at least a year. If
you notice that the batteries no longer hold a charge for as long as they
should, you may need to replace them.
Maximizing work time
Your PowerBook’s batteries can provide up to 3.5 hours of work time each
before you need to recharge. The actual work time available depends on
which model of PowerBook you have, what equipment you’re using with your
computer, and what steps you take to conserve power while you work.
For battery conservation tips, see the “Batteries & Power” topic of Macintosh
Guide, available in the Guide (h) menu.
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Chapter 5