Huawei Watch battery requires calibration?

Hello all,

I bought this watch recently, and I noticed that after fully charging the watch, it will drain quite fast (8-12hrs) to 1%, and then holds on this 1% for up to 24hrs more.

This is limiting my experience on it, despite OK overall battery life, because at 15% the watch will activate battery saving mode. So I'm stuck on this mode for like 30 hours of the total battery life span.

I tried resetting the watch multiple times, and I also updated to Wear 2.0 but still the same behaviour.

Is that a known issue with this watch? Is there a way to re-calibrate it?