Hi all, I completely forgot to update this thread with what happened to me. The problem was with my watch’s original battery. I worked with Zeblaze support and they asked me to try different ways to charge the watch but nothing worked. So they sent me a replacement battery, and when I opened my watch I found that the original battery was defective. It was rusted and swollen, it looked like a jelly bean which was weird, and after replacing it the watch works fine. Anyone with this problem should immediately suspect it’s the battery and ask Zeblaze for a replacement.
And just to make clear, I never exposed my watch to any water at all. It never got wet, it just sat inside a drawer when I didn’t wear it.