Since updating to watch os 26.3 both my Apple Watch 10 and my wife’s Apple Watch 10 batteries are draining much faster. They last less than a day sometimes even just half a day when they used to last about 18 hours. We’ve done all of the usual things suggested but we haven’t changed how we’ve used the watch or any settings, just updated it.
Apple Watch Series 10, watchOS 26
So I ran my info with Chat GPT and it was calling out my iCloud on my iPhone was causing the issue. I have reset my watch to factory didn't set it up and my battery dropped 52% Sleeping from 11 pm to 6 am. I was watching my battery drop about 10% an hour. I signed out of iCloud on my iPhone resigned in and not it's been over an hour and Im still at 100%.
Below is what I found on Reddit and the screen shot is what Chat told me. Hope this helps.
I was having the same issue. I tried all the things they say boot the watch, unpair/repair etc I was still loosing about 5% battery per hour day or night.
I created a system log (press the crown and side button (not the action button) for about 1 second, you’ll feel a haptic to confirm it work. Then go into the Apple Watch app on your phone, general and logs. Export the log you just created.
I uploaded the log to ChatGPT, explained my issue and asked it to check the logs for anything that could be causing excessive battery drain.
It was able to identify that my iCloud password sync (https://www.reddit.com/search/?q=iCloud+password+sync+stuck+battery+drain&cId=5291873d-5e08-4866-903c-d3be74462312&iId=29e15e94-9a38-463a-9362-5be528fdfb70) process had been running for 3 days and was likely “stuck” it told me to go to iCloud in my phone, disable password iCloud sync for 30 seconds, restart the watch and re-enable
After that I charged to 100, and I’m back to 1-2% battery drain per hour
Hope this helps
So I ran my info with Chat GPT and it was calling out my iCloud on my iPhone was causing the issue. I have reset my watch to factory didn't set it up and my battery dropped 52% Sleeping from 11 pm to 6 am. I was watching my battery drop about 10% an hour. I signed out of iCloud on my iPhone resigned in and not it's been over an hour and Im still at 100%.
Below is what I found on Reddit and the screen shot is what Chat told me. Hope this helps.
I was having the same issue. I tried all the things they say boot the watch, unpair/repair etc I was still loosing about 5% battery per hour day or night.
I created a system log (press the crown and side button (not the action button) for about 1 second, you’ll feel a haptic to confirm it work. Then go into the Apple Watch app on your phone, general and logs. Export the log you just created.
I uploaded the log to ChatGPT, explained my issue and asked it to check the logs for anything that could be causing excessive battery drain.
It was able to identify that my iCloud password sync (https://www.reddit.com/search/?q=iCloud+password+sync+stuck+battery+drain&cId=5291873d-5e08-4866-903c-d3be74462312&iId=29e15e94-9a38-463a-9362-5be528fdfb70) process had been running for 3 days and was likely “stuck” it told me to go to iCloud in my phone, disable password iCloud sync for 30 seconds, restart the watch and re-enable
After that I charged to 100, and I’m back to 1-2% battery drain per hour
Hope this helps
Did you already try to force restart your Apple Watch after the latest update?
To force restart your watch, press and hold the Digital Crown and the Side button together for about 10sec, until the Apple logo comes back again.
If this does not help, unpairing and pairing the Apple Watch again has helped other users.
To make sure your backup data is not corrupted, set the watch up as a new device first and test the battery life after that. You will lose your created Watch faces and may have to set up your cards in the wallet app again.
Unpair and erase your Apple Watch - Apple Support
Also have a look at the posts in this discussion:
Apple Watch battery draining fast - Apple Community
Also force restart your paired iPhone and make sure you have installed the latest iOS, which is 26.3.1 at this time.
Force restart iPhone - Apple Support
I have not found a resolution. I uninstalled all optional apps, forced re started multiple times and erased it then re paired it as a new watch a couple of times. It still only lasts less than 12 hours. I changed it to 100% last night at 8pm and by the time I got up at 4 am it was done to 31%
This never happened before 26.3 and my wife has the exact same issue.
Do NOT leave it off charge overnight!
Lay it on its side, crown up, on charge, and use it as a night stand clock.
Yes, I have force restarted and I have unpaired, erased and re paired as new watch, not from backup. Tonight I charged it to 100% at 8pm, went to bed and woke up at 330am to 46% battery. Not acceptable. I am having to charge the watch multiple times through out the day.
Have you found an issue I’m having the same issue on my AwU3
Thanks. This was great. I ran my log file through Chat GPT and it showed usually high iMessage usage. So I followed the instructions try and resolve it and we shall see. Very cool tip.
Apple Watch 10 battery drain after watchOS 26.3 update
