My wife's beloved Fitbit Versa smartwatch decided to shutdown one day (before our holiday). The screen wouldn't turn on, and when charging, the device would get very hot. I left it to discharge and tried to charge it again, but it would get hot and the screen wouldn't start. The proximity sensor on the back would flash, but that's about it. The watch was 3-4 years old, so I knew the battery must have expanded and probably failed. Also, warranty was out, no chance of replacing it. So, I did what I know best - I took it apart, to see if I could replace the battery (I'm not a fan of throwing something out just because a part failed, or it's old). I followed this tear-down guide, and using a razor blade to take out the screen is a must: My variant was a bit different inside, so here is a picture guide: https://imgur.com/a/mPtzhyf You will need a trox 3 screwdriver to take out the 4 main screws, and a very small (don't know the size) Philips screwdriver to take