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The adult version of the kids’ game, Operation, where you remove “organs” from a patient is the game of smartphone repair.

I just replaced the battery on an old iPhone 7. I probably spent half my time just trying to seat the microscopic screws so I could put them back in.

Also at that size a Y000 screw is almost indistinguishable from a PH000 screw. The Y has a 3-way pattern and the PH is the Philips 4-way pattern. They both look just like dots to the naked eye.

Getting the case open and getting the screws back in was the hardest part of doing my own battery replacement.