MacBook Pro 13" Unibody Mid 2012 Battery
The screws have, indeed, Phillips 000 heads. The problem can be that the Phillips 000 driver BIT supplied with the repair kit is of INFERIOR QUALITY! I have extensive experience with Phillips head screws, and no amount of firm pressure and proper driver seating would loosen the screws. I found a micro-tool kit I had for repairing computers, grabbed the Phillips 000 bit, and it worked PERFECTLY! The instructions are pretty good, but the QUALITY of the tools supplied is a real PROBLEM.
The “Pentalobe” screws require the STAR DRIVE driver, NOT a Phillips driver.