Chosen Solution
I’ve had this for about 9 months now (had another, but lost it on a mountain), and it just stopped being able to charge. Tried switching cables, but that didn’t help. Watch is now dead and still not charging
Usually it’s corroded or dirty contacts. If they are only dirty, You can clean them with a small screwdriver or Q-Tip and some cleaning alcohol (Don’t drink! Just apply to contacts!) Or you can change the contact-plates yourself. There is even a very good video on this on YT (https://youtu.be/vxvehGQG2YQ).
Replace the battery.. Replace the battery..
