2012 15 in Retina MacBook Pro Battery Replacement

My Problem

The battery was bad and wouldn’t hold a charge

My Fix

Amazingly smooth experience given the difficulty level. Lot of things to remove, but the instructions were spot on.

My Advice

I used sheets of white paper to write the type and number of screw(s) removed and drew a circle to put the screw(s) in and keep track of everything. It made putting things back together much easier.