Why does my Apple Watch only charge to 80%?
Why does my watch only charge 80%?
[Re-Titled by Moderator]
Apple Watch Series 8, watchOS 11
Did you check the settings for Optimized Charging?
You can disable this feature and charge your watch to 100% each time you put it on the charger.
Have a look at the related article, in which it is also being explained, why Apple introduced this option:
About Optimized Battery Charging on your Apple Watch - Apple Support
