Remove the following ten screws securing the lower case to the upper case:

• Three 13.5 mm (14.1 mm) Phillips screws.
• Seven 3 mm Phillips screws.

Using both hands, lift the lower case near the vent to pop it off two clips securing it to the upper case.

Remove the lower case and set it aside.

For certain repairs (e.g. hard drive), disconnecting the battery connector is not necessary but it prevents any accidental shorting of electronics on the motherboard. If you do not disconnect the battery connector, please be careful as parts of the motherboard might be electrified.

Use the edge of a spudger to pry the battery connector upwards from its socket on the logic board.

It is useful to pry upward on both short sides of the connector to "walk" it out of its socket.

Bend the battery cable slightly away from its socket on the logic board so it does not accidentally connect itself while you work.

Remove the two 7.4 mm Tri-wing screws securing the battery to the upper case.

Carefully peel the battery warning label off the upper case between the battery and the optical drive to reveal an additional Tri-wing screw.

Remove the last 7.4 mm Y1 Tri-wing screw securing the battery to the upper case.

Do not remove the label from the battery.

Use the attached plastic pull tab to remove the battery from the upper case.