Apple PowerBook G3 - Manual (Page 37)

Using Your PowerBook and Connecting to a Network 37
Power Sources
Your computer can draw its operating power either from a PowerBook battery in one of the
expansion bays or from an external power source, using the external power adapter that
came with your computer.
AC Power
You can run your computer from an electrical outlet by plugging in the external power
adapter that came with your computer. A battery in an expansion bay will automatically be
charged whenever the external power adapter is plugged in.
Main Battery
The main lithium ion (LiIon) battery provides power to your computer when it is not
plugged into an electrical outlet.
This battery should provide power for 2–3.5 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). You can find more information about the battery and power conservation
software that came with your PowerBook in the online help, available in the Help menu.
Note: The LiIon battery is charged whenever the external power adapter is connected.
However, the adapter will charge the battery more quickly if the computer is shut down or in
sleep.
Optional Second Battery
You can configure your computer with a battery in each expansion bay. This configuration is
especially useful when you need to use your PowerBook under battery power for a long
amount of time, such as on a long plane flight. You can purchase a second battery from an
Apple-authorized dealer.
Note: When fully charged batteries are installed in both expansion bays, the batteries are
discharged one at a time. The battery in the left expansion bay is discharged first. When the
charge in the left battery is depleted, the PowerBook switches to the battery in the right
expansion bay.
Important Be sure to use only the external power adapter that came with your computer
or one made specifically for this PowerBook model.