Apple PowerBook (Duo 270C) - Manual (Page 299)

Power
The battery is draining too fast.
n
Turn down the screen brightness, turn off virtual memory,
move the battery conservation slider in the PowerBook
control panel to Better Conservation, or work with the power
adapter plugged in.
n
Your computer supplies power to the modem whenever a
communications program is open. Quit your communications
program if you aren’t using it.
n
If you aren’t using network services, you can also save power
by turning off AppleTalk in the Chooser.
n
Your battery may need to be discharged and recharged
completely. See Chapter 6.
n
Older PowerBook batteries do not hold a charge as well as
new ones. You may need to replace the battery.
The battery can’t be recharged.
n
There may be a loose connection. Make sure all plugs are
securely attached.
n
If all connections are OK, then the battery is probably
damaged or dead. You’ll need to obtain a replacement battery
from your Apple-authorized dealer.
The computer goes to sleep too often.
n
Open the PowerBook control panel and slide the slider to
Better Performance.
The PowerBook won’t run off the battery and/or the
battery won’t charge.
n
Make sure your PowerBook is running system software
version 7.1 or later. You may have a new battery which
requires the later system software version.
Quick Reference 283