Removing the battery before lifting out the logic board is not strictly required, but makes removing the logic board easier and safer. If you leave your battery in, be especially careful not to bend the logic board against the battery's case near its bar code.

Remove the following Tri-point screws securing the battery to the upper case:

One 5.5 mm Tri-point screw

One 13.5 mm Tri-point screw

Lift the battery out of the upper case.