Just got my first Apple Watch this weekend. It is a SE (Gen2) 44mm. I charged it overnight and when I took it off the charger, it showed 96% (not the 100% that my wife's new watch showed). I have not had the watch on all day, but just sitting on my desk. In just over 5 hours, it is down to 86% already. Should it be draining that fast when it is not being used?
Apple Watch SE (2nd generation)
Draining 10% in 5 hours doesn't sound too bad. However, I would be concerned why it does not charge to 100% overnight unless it has something to do with the optimized charging feature. Your Apple Watch learns from your daily charging habits to improve the lifespan of your battery. Learn more about Optimized Battery Charging on your Apple Watch. For more info, see:
Check your battery and charge your Apple Watch - Apple Support
To understand Apple Watch performance and its relation to your battery, see:
Apple Watch Battery and Performance - Apple Support
“Battery life” is the amount of time your device runs before it needs to be recharged. “Battery lifespan” is the amount of time your battery lasts until it needs to be replaced. Maximize both and you’ll get the most out of your Apple devices, no matter which ones you own. See the "Tips for Apple Watch" section in:
Batteries - Maximizing Performance - Apple
If the battery drains too fast after an update, see all the replies to:
has anyone had battery issues with the 10… - Apple Community
Battery Drain since watchos 7.4 - Apple Community
WatchOS 7.5 battery drain - Apple Community
FWIW, in some cases, unpairing the watch, completely erasing it, then pairing and restoring the backup will resolve the battery draining issue after an update. (Simply unpairing and pairing again may not work.)
Unpair and erase your Apple Watch - Apple Support
Also, some people have found that simply waiting a few days after an update resolves the battery draining problem.
Also see:
Apple Watch battery drain - the ultimate … - Apple Community
My Apple Watch Battery Is Draining Quickly
