Apple Watch battery draining fast after 6.2.1 update

Here's a workaround that worked for me (from another Apple support thread: https://discussions.apple.com/thread/250840427

Charge the watch for long enough that you know it's truly at 100% despite it's incorrect battery measurement/readout.

Power off watch for 15-30 mins (the amount of time is TBD, but I did 30 mins)

Turn watch on.

Done.

In my case (Nike S4 GPS 44mm WatchOS 6.2.1), this fixed the exact problem you described, and the watch started operating as normal once again.

Some people indicate that you might have to do this more than once;

possibly once a week. Not clear. I did it once, then it seemed to fix

my S4 for 48 hours (then I sold it). I was in the process of getting a

S5, so I wasn't able to test my S4 for more than a two days.

Prior to this, I did a bunch of other troubleshooting steps including force restarting watch, iphone, and unpairing/repairing watch. It's possible that the combination of those things was the fix, not clear. Apple doesn't seem to know whats going on here based on everything I've read.

nismo95tt wrote:

Here's a workaround that worked for me (from another Apple support thread: https://discussions.apple.com/thread/250840427

Charge the watch for long enough that you know it's truly at 100% despite it's incorrect battery measurement/readout.

Power off watch for 15-30 mins (the amount of time is TBD, but I did 30 mins)

Turn watch on.

Done.

This is what worked for me! I documented my experience here: https://discussions.apple.com/thread/251360535

I made a post the other day about mine. Apple had me do a total factory rest on both devices. Set the iPhone to devise, wait 3-4 days to install apps and it should be fine. With mine I have a series 4 with cellular and gps and my battery was only lasting about 4 hours. After doing the whole factory pain in the *** reset I haven’t had any problems and I’m going on my second week. I can get almost 2 full days on my watch now. Hope this helps. I know it sucks doing a whole reset.

After an update it’s common for your Apple Watch to experience decreased battery life. It typically resolves itself within 48 hours. This is a pretty extreme case fo battery drain, so I’d restart your Apple Watch by pressing and holding the side button, swiping the power off slider, and pressing and holding the side button again.

Not sure on a 3 as I have the 4. I twice unpaired my watch from phone. Second time I reset the watch to delete all data and also to reset from backup rather then as a new watch- I did not back up watch but phone was good. Reset from a back up of another version other then the 6.2.1 first listed But once done the watch version was back to 6.2.1. I shut all notices off- deleted all apps and It holds battery now. Will slowly add in things I want one at a time to see if still holding. Hope this helps. It has with other folks above.

Thanks!

That worked for me as well.

apple watch 5, just 3 months old.

Charged to 100%, shut down for 15 minutes and restarted.

has been showing gradually decreasing battery percentage and is now 50% after 10 hours of usage

So after talking to Apple support they had me do a complete factory reset on both devices. I don’t know what it was, but it fixed whatever problem I had with my Series 4 watch. When I did the reset on the phone he told me to set it up as new and wait about 3 days before I added any apps back onto my phone. Just a little FYI.

I had an issue. I turned off heavy rotation and removed music from my Apple Watch. It solved the issue. I believe it was constantly trying to sync the music with my phone.

I followed Comus1’s instructions to unpair my watch from my iPhone and then pair up again. So far I’ve not had to charge my watch during the day.

I powered off phone and then my watch. Then power phone then watch. That seemed to help my battery level, so far. I have a friend who owns Electronics repair store. He said that the new update is sometimes to powerful for the old models and your watch is running trying to operate on new updates. (If that makes since.

For sure I’ll keep you updated. So far I’m going on 2 weeks now and I haven’t seen any problems yet. Trust me it’s a total pain in the butt resetting everything and then reinstalling everything. I was to the point where I was just about done with my Apple Watch. I was so ******.

I hate to say it but I've had no music on my watch for months and I've still seen this issue despite that. When I do see it, then the method of charging to 100%, turning it off for a half hour seems to consistently work to "solve" it for another 2-6 weeks.