Apple Watch 8 battery draining fast
Watch8 10.5 (21T576)
iPhone 13 Pro Max 17.5.1 (21F90)
Apple Watch Series 8
Question marked as
What is required is a forced restart of your Apple Watch. A forced restart is more than just turning your Watch off and on. Observe the battery usage for the next 24 to 72 hours. If there is no improvement you’ll need to unpair the Watch from your iPhone, force restart the Watch and the iPhone and lastly pair the two devices. Battery usage will return to normal in 24 to 72 hours.
Force restart Apple Watch - Apple Support
Force restart iPhone - Apple Support