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74 Appendix B Safety, Use, and Care Information
Using Connectors and Ports
Never force a connector into a port. If the connector and port don’t join with
reasonable ease, they probably don’t match. Make sure that the connector matches the
port and that you have positioned the connector correctly in relation to the port.
Using Your PowerBook
When you’re using your PowerBook or charging the battery, it is normal for the bottom
of the case to get warm. For prolonged use, place your PowerBook on a flat, stable
surface. The bottom of the PowerBook case functions as a cooling surface that transfers
heat from inside the computer to the cooler air outside. The bottom of the case is
raised slightly to allow airflow that keeps the unit within normal operating
temperatures. In addition, the computer vents warm air from the back of the case.
Carrying Your PowerBook
If you carry your PowerBook in a bag or briefcase, make sure that there are no loose
items (such as paper clips or coins) that could accidentally get inside the computer
through an opening such as the optical drive slot.
Storing Your PowerBook
If you are going to store your PowerBook for an extended period of time, keep it in a
cool location (ideally, 71° F /22° C) and do one of the following to preserve your
PowerBook battery life:
 Discharge the battery 50 percent before storing your PowerBook.
 When storing your computer for longer than five months, discharge the battery to
approximately 50 percent and then remove it from the PowerBook. If you are storing
your computer for an extended period, recharge your battery to 50 percent every six
months or so.
Warning: Do not place your PowerBook on a pillow or other soft material when it is
on, as the material can block the airflow vents, in particular the rear vents, and cause
the computer to overheat. Never place anything over your keyboard before closing
the display. This can cause your computer to cycle on and off which might create
excessive heat and drain your battery. Never turn on your computer unless all of its
internal and external parts are in place. Operating the computer when it is open or
missing parts can be dangerous and can damage your computer.