How To Remove and Replace the Battery.
Remove the screws that secure the battery to the base frame.
Lift the battery off the base frame.
Turn the computer over, open the display, and press the power button for five seconds to ground the system board.
Align the screw holes on the New battery with the screw holes on the base frame and press down on the battery to connect it to the battery connector.
Replace the screws that secure the battery to the base frame.