Apple PowerBook (3400 series) - Manual (Page 83)

Power sources
Your computer can draw its operating power from three different sources.
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Main battery Your computer came with a lithium ion (LiIon) 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).
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Optional battery Your computer can also use a nickel-metal-hydride (NiMH)
battery. This battery provides somewhat less work time than the LiIon
battery supplied with your computer. The precise amount of work time
with a NiMH battery depends on the Macintosh PowerBook model you
have and the battery conservation features you use.
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AC power You can run your computer from a grounded electrical outlet by
plugging in the external power adapter that came with your computer. The
installed battery will automatically be charged whenever the external AC
adapter is connected. The external adapter will charge the battery more
quickly if the computer is shut down or in sleep, rather than turned on or
operating.
IMPORTANT Be sure to use only the external power adapter that came with
your computer (model number M4895) or one made specifically for this
PowerBook model.
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6
Power Management
Read this chapter for
information about your
Macintosh PowerBook’s battery.