Thanks for the guide! I successfully managed to replace my battery. A few things I noticed during my own attempt:

1. The centerpiece cover only fits in one way when replacing it over the battery, because one side of the watch has two buttons and the other side only has one.

2. Immediately after replacing the battery and replacing the centerpiece cover, only some segments of the display were working and the watch was non-functioning. After a little googling I discovered that a CMOS clear might be required, and I followed https://rajgopalmenon.wordpress.com/2020... in order to do this. Within 5 minutes of doing the CMOS clear my watch started working again.