Worst battery performance

After a few days, power cycle the Apple Watch and your iPhone and battery usage should return to normal.

After a major operating system upgrade there is housekeeping the operating system is doing in the background that uses battery. When this is completed, and you power cycle the devices, life returns to normal.

Hello Friend,

Make sure to turn off the background app refresh and check walkie-talkie is not accidentally turned on.

Check there is no workout running while you're not working out (yellow circle at the top if the screen.)

Make sure you have no VPN or VPN-based ad-blocker on the iPhone. Uninstall it then remove any profiles (iPhone Settings, General VPN & Device Management)

Force restart your watch i.e. press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo. 

Then while the Watch is restarting Force Restart the paired iPhone Force restart iPhone – Apple Support (UK)

Try it for a couple of days especially if you sync photos to your Watch.

If the battery still drains then Unpair the watch and then pair it again. 

Unpair and erase your Apple Watch – Apple Support (UK)

Batteries - Maximising Performance - Apple (UK)

Official Apple Support

Visit any Apple Store.

Phone numbers

Contact Apple for support and service - Apple Support

NOTE: Generally after a major operating system upgrade, the OS is doing housekeeping that affects the battery life. This generally quiets down. After a few days, try power cycling your Apple Watch and iPhone.

SOLUTION!!!!

I’ve had this happen on two, separate, occasions now. Both times I totally reset the watch and it started working again. It sucks, and I’m hopeful Apple will figure it out, because you have to:

• COMPLETELY ERASE THE WATCH
• SET IT UP AS A NEW WATCH, NOT FROM A BACKUP
• AND, ESSENTIALLY START OVER FROM SCRATCH

Good luck for me is that I’m a pretty simple/novice watch user. Those who are more involved are gonna have a longer turn around time. It’s like going back to the days of setting up every new device from scratch…at least it’s via WiFi and not dial up.

Hope this helps…

I recommend reaching out to Apple support.