Some users reporting rapid battery drain on Apple Watch after updating to watchOS 10.1.
It is not yet determined how widespread the issue is or which models are affected.
Reference: Apple Watch users complain of rapid battery drain and overheating with watchOS 10.1
Recommendations
Developer:
Beware of battery drain issue, monitor app behavior.QA engineer:
Beware of battery drain issue, add to known issues list.PM/DM:
Beware of battery drain issue, consult users on issue.