Turn off the computer, or enter hibernation mode. Then disconnect the AC adapter and all cables from the computer. Note: If you are using a PC Card, the computer may not be able to enter hibernation mode. If this happens, turn off the computer.
Close the computer display, and turn the computer over.
Unlock the battery latch by sliding it to the left (1). Holding the latch in the unlocked position, remove the battery (2).
Install a fully charged battery and slide the battery latch to the locked position.
Turn the computer over again. Connect the AC adapter and the cables to the computer.