I have an ultra two updated it to 10.1 battery drained to 10% in three hours from 100%.
I have reset the watched factory settings then paired to the phone and it’s still drained, and was very hot. The watch has turned into a wrist warmer
I was finally able to get 100% charge by turning it off, letting it cool, and while still off I put it on the charger where it charged to 100%. It did turn the watch back on but the screen was locked and did not overheat like before while charging and stopping.
I have found that if I do not unlock the watch, the battery does not drain but what good is a smart watch if it’s locked, and all you can do is see the time and date.
The battery appears to be OK as long as the watch screen is locked. What good is it if the screen is locked and you can’t even use it other than to look at the time. And then it’s annoying to see the lock screen pop-up to enter in your passcode. If you lift your wrist quickly.
Apple needs to fix this today!