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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. The battery should provide between 2.5 and 5 hours of work time
(you may get longer work time depending on the battery conservation
features you choose).
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 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 Receive low-power messages on your display.
m Look at the battery level icon next to the clock in the menu bar (if this
feature is turned on).
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6
Power Management
Read this chapter for
information about your
Macintosh PowerBook’s battery.