Apple PowerBook G3 - Manual (Page 30)

30 Chapter 2
Using the Expansion Bays
Your PowerBook comes with dual-function expansion bays that accept either expansion bay
modules or PowerBook batteries. Expansion bay modules–such as a floppy disk drive, CD-
ROM drive, or DVD-ROM drive–are removable, which allows you to easily switch or replace
them with another module.
Dual-function expansion bays give you maximum flexibility in setting up your PowerBook to
meet your needs. For example, if you are working with your PowerBook at home or in the
office and you have the power adapter plugged in, you can have a floppy disk drive module
in one expansion bay and a CD-ROM or DVD-ROM drive module in the other expansion bay.
If you are traveling on a long plane trip, you can have a battery in each expansion bay.
Using Expansion Bay Modules
Expansion bay modules and PowerBook batteries are inserted and removed in the same way.
You can switch expansion bay modules while the PowerBook is turned on, in sleep, or shut
down. You should change batteries only when the PowerBook is shut down or in sleep
(unless there is a charged battery in the other expansion bay). For more information on
PowerBook batteries, see “Power Sources” on page 37.
If you purchase an expansion bay module from an independent supplier, be sure to follow
the instructions that came with the device. Some modules may have special requirements.
Important Only use expansion bay modules and batteries specifically designed for this
PowerBook. Expansion bay modules and batteries from other PowerBook computers are
not compatible.
Left expansion
bay
Right
expansion bay
Important Don’t switch modules while the computer is starting up. Also take care not to
remove a module if a floppy disk, CD-ROM disc, or other media is inserted (even if the
computer is in sleep). If you remove a module (such as the CD-ROM drive) when a disc is
inserted, you’ll see a message telling you to reinsert the module.