Step 7
Remove the two Phillips screws from either side of the right wall of the battery compartment (not the ones closest to the battery connector).
Step 8
Remove the four indicated Phillips screws from the front wall of the battery compartment. When working from the left, remove the 2nd, 4th, 7th and 9th screw.
Step 9
Remove the following 4 screws from the back of the computer:
Two 7 mm Philips on the far sides.
Two 10.5 mm Phillips toward the center.