watchOS 7 Battery Drain

I updated my series 4 Apple Watch to WatchOS 7 today. I use my watch all day and usually have about 30% battery left when I go to bed and start changing. Today my phone got to 10% by 2:30 pm! Why is this drawing so quickly?

Posted on Sep 17, 2020 2:59 PM

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Posted on Sep 20, 2020 10:01 AM

I had the same issue on my Apple Watch Series 4 after updating to iOS7. I tried shutting down background app refresh, and ensured sleep app and hand washing apps were off.


This didn't fix issue so I read on some other forums about repairing to your iPhone. So I did a reset on my watch. I restored using the same backup I just reset and today the problem seems to be gone. After a 2hour walk I have only went down 13% which is normal level. When I was running out of battery my watch was showing a 35% drop after my walk.


if restoring from the backup didn't work I was going to try setting up as new watch but obviously I didn't have to go that far.

874 replies

Sep 18, 2020 12:10 PM in response to TYFC

I have noticed excessive battery drain on both iPhone 8 after moving to iOS 14 and Watch 3 after installing 7. However when I turned on power save mode on the phone, effectively killing background tasks (and I normally only allow selected apps to have this privilege) the drain on both devices returned to more acceptable levels - even whilst doing a workout, the watch stopped losing power rapidly as did the phone.


As a workaround you may choose to try this and see if helps, if so this is pointing to errant background tasks / data transfer issues, which will either 'settle' or require an update. There is a separate issue with outdoor workouts not syncing / reading map data and as one of the larger databases on the phone is the health app, maybe this is cause of the issue.

Sep 20, 2020 12:43 PM in response to BrandonKL

Much to my surprise, un-pairing and re-pairing has improved things significantly. I've been testing for 1.5 days now on my Series 4, purchased on launch day.


After re-pairing, I kept hand washing off and I ended yesterday at about 35% with moderate use (no workout). I'm back to losing about 4-5% battery per hour, which is normal for me.


Tomorrow will be the big test, since I get a lot of emails and text messages pushed to my watch during a normal workday.


Strangely, after re-pairing, my battery health was at 91%. Before the re-pair, it was 96%. Go figure.


It looks like the un-pair and re-pair isn't working for everyone, but it is working for some. Give it a try. I was really surprised it worked.



Sep 20, 2020 5:58 PM in response to dmkleist

I posted this morning about this same issue. Subsequently I decided to unpair my Apple Watch 4, turned on and off my iPhone and then pair my watch again and guess what.....issue resolved. Woohoo!!! Battery life still doesn’t seem to be quite the same as it was 3 days ago but definitely able to get more than a few hours before it’s dead. It hasn’t died since I paired it back to my iPhone.

Sep 21, 2020 1:59 AM in response to dmkleist

Unpairing and install as new works for me. All new and „old“ features enabled again (hand washing, always on display, app refresh, etc..).

I‘m using an Apple watch 5 cellular! Now 18% battery drain after 4 hours „normal“ usage. This is what was before and will lead to approximately one day usage.

Immediately after the update one charge lasts for 8 hours maximum!!!

Sep 21, 2020 8:08 AM in response to nikolasb

Same for me (AW4) - I unpaired then setup as a new watch; have optimised apps, updates, notifications etc and today battery usage seems to be back to normal with a normal day of music, notifications, workout etc

Or maybe it just needed time to settle, reindex or whatever after the update - if so not impressed!

I’m relived but it sucks to have to do this for an upgrade that doesn’t hold

much benefit for older models of AW!

Sep 22, 2020 6:07 AM in response to Kevandagostino

Unpair the watch, pair the watch and restore from backup. This worked for me. Fully charged yesterday at 1000 and 23 hours later only at 50%. I did reduce screen brightness to lowest level. I don’t expect to continue to have this good of battery life, as I am not using the watch completely normal yet. Apple does need to correct this software problem as unpair/pair is a patch, not a fix. IMHO

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watchOS 7 Battery Drain

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