Apple PowerBook G4 (15-inch, Double Layer Super Drive) - Manual (Page 52)

52 Chapter 3 Using Your PowerBook
Note: If you have installed additional memory in your PowerBook, it may only provide
power for less than three minutes. Also, changing batteries several times in a short
period can further reduce this length of time.
Important: If only one flashing light is on, very little charge is left. If no lights are
visible, the battery is completely drained and the computer will not start up unless the
power adapter is connected. Plug in the power adapter to let the battery recharge, or
replace the drained battery with a fully charged battery (see page 52).
If the battery icon in the Finder menu bar is set to show the percentage of charge, you
might sometimes notice that the battery does not attain a full 100 percent charge
when the power adapter is attached. This is normal behavior; battery life is saved when
charging is not continuously cycled on and off when the battery’s charge capacity is
between 95 and 100 percent. When the battery level eventually drops below 95
percent, it will charge all the way to 100 percent.
Removing and Replacing the Battery
To remove the battery:
1 Shut down your PowerBook. Disconnect the power adapter, phone cord, and any other
cables connected to the PowerBook to prevent damaging the computer.
Battery Battery LEDs