How to Replace the Battery in a Fitbit Versa 4 FB523 Watch Repair Tutorial

[@JTom52]

What size screw driver do you need on the tiny philips head screws for the battery assembly? I have removed the motherboard but the 4 screws on the back are not the same as the Torx screws that were holding in the motherboard. I've tried using a bit that claims to be PH0000 but it's still not small enough, so I don't know if the problem lies in me using cheap set with a bit not ground correctly or if I need to find a different tool all together

[@Joesge]

Philips 1.0mm