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Power sources
Your computer can draw its operating power from two different sources.
m
Main battery
Your computer came with a nickel-metal-hydride (NiMH)
battery. This battery should provide power for 2–4 hours of work time (you
may get longer work time, depending on the Macintosh PowerBook model
you have and the battery conservation features you use).
m
AC power
You can run your computer from a grounded electrical outlet by
plugging in the power adapter.
These power sources are described in more detail in the following sections.
Monitoring the battery charge
There are three ways you can determine the charge level of your battery:
m See low-power messages on your display.
m Look in the Battery Monitor portion of the Control Strip.
For information on the Battery Monitor, see the “Batteries & Power” topic
of Macintosh Guide, available in the Guide (h) menu.
m Look at the battery level icon next to the clock in the menu bar.
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5
Power Management
Read this chapter for
information about your
Macintosh PowerBook’s battery.