Apple Watch sudden battery drain?

Is there something strange happening with WatchOS today? I have a Series 2 Nike Edition running 5.3.2 and a Series 5 Nike Edition running 6.0.1. Both has normal "all day battery" life prior to today. However, today both have drained battery much quicker (the Series 2 drained almost completely in half a day, the Series 5 now down to 7% after 10 hours). What would cause this sudden battery drain? No change in usage.

Apple Watch

Posted on Oct 14, 2019 1:29 AM

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Posted on Feb 23, 2020 9:54 AM

This is a follow up to my previous posts. I found that my iPhone and Apple Watch were still draining faster than they should.


Reviewing the diagnostic logs from my iPhone and watch, I found TrustedPeersHelper still taking a lot of CPU on both devices. My mac has been fine, but something still wasn't right with my other devices.


So, this time I ran this terminal command from my mac: tpctl reset


I was then forced to login to iCloud on my mac and iPhone, but ever since my watch and iPhone are not running hot. Yesterday, I wore my watch from 7 am to midnight, and I still had 60% remaining on my watch, and 70% on my iPhone.


The "tpctl reset" resolved all of my battery issues!


If you don't have a mac, I'd recommend calling Apple or going to an Apple store. They must have a way to do the equivalent of "tpctl reset" on your behalf from their side. I hope this helps everyone.

206 replies

Nov 10, 2019 3:45 AM in response to hillbillyd

Restarting did absolutely nothing for me. Yesterday, Series 4 watch drained to 20% in less than 9 hours. 10xs phone drained to 5% in exact same time! This NEVER happened prior to iOS 13.xx being installed.

This tells me my watch is now basically useless. BTW, never played any music or any other activity all day long.

one thing I did notice was if I put my iPhone in airplane mode, my iWatch battery drain would slow down considerably.


HELLO APPLE!!!!!


Nov 17, 2019 9:15 PM in response to MagicMouseOK

Im in the exact same boat as you Magicmouseok except I have a series 2 Nike edition. Same time frame as well. It’s been fine up until a few days ago and now barely gets thru the day. I’ve gone thru and turned some background refresh stuff off and it’s slightly helped but I never had to mess with anything like that before and was getting great life out of it prior to about the 15th as well. This needs to be fixed.

Nov 18, 2019 1:39 PM in response to MagicMouseOK

FURTHER UPDATE: As of 2:00 p.m., my Watch v4 had used 50% of its battery (over 7.50 hours). Usually, I only use between 40% and 60% of the battery over 14-15 hours. So, I had to go put it on the charger. In the meantime, I discovered iOS 13.2.3 is available (for iPhone and iPad), and so I've installed it.


Let's see if that fixes the battery draining problem.

Nov 23, 2019 8:48 AM in response to demuire

Has anyone tried the watchOS 6.1.1 beta? Just curious if it helped at all with this issue. Right now I'm keeping my replacement watch on 5.3 until I know this issue is resolved. With 5.3, battery life is completely back to normal for both my watch Series 3 and iPhone 11 Pro. It's now been 3 days with my replacement watch, and it's great again having a watch that lasts a full day and then some. And my iPhone also is back to normal. I'm back to 70-80% after a full day on my phone. With my old watch on 6.1, my phone was at 30% or less at the end of the day.


Not sure if it's possible to have an Apple Store downgrade back to 5.3, but I would recommend it if you're having this issue.

Nov 27, 2019 8:21 AM in response to demuire

Weirdly, the problem for me has disappeared. Having tried absolutely everything I could think of (with no noticeable improvement), and practically given up, a couple of days ago battery usage returned to normal. I've since turned all the settings back to what I'd consider 'normal', and reinstalled my apps to the device and it's all working fine.


I have no explanation for what has happened. I haven't installed the beta. The drain just suddenly and randomly stopped as quickly as it started... perhaps there was something in the back-end that Apple were able to fix on their server end. I did let them know on Twitter that I was seeing multiple instances in my watch logs of 'TrustedPeersHelpers.cpu_resource' flagging CPU usage of 98% a couple of days before things, for me at least, suddently returned to normal.


Anyone else noticed improvements?

Nov 27, 2019 8:31 AM in response to Tednol

And actually now I think about it there was one other thing that I did just before the battery life seemed to improve dramatically for me... I added a new card to Apple Pay on my watch. This could be entirely coincidental, or it could have randomly fixed the bug I was encountering. Sharing just in case it helps anyone else.

Dec 8, 2019 5:23 PM in response to demuire

I have the same issue and it started at the exact moment I upgraded to Apple Watch OS 6.0 and remains with 6.1. Before I used to get 2+ days before charge. Now, I get 8 hours. When looking at usage, the actual usage time is 2 hours and 4 minutes and I have 7% battery left. I honestly use the watch most days for nothing but a watch. Tried rebooting and nothing has changed.


The watch is paired with a XR and that seems to be fine. No problems there. Not sure what to do. At this point, it is a fragile watch without the ability to do much else. Can't make it though a 3 hour bike ride anymore to measure HR and such. Any other suggestions and tips are appreciated.

Dec 11, 2019 7:04 AM in response to DaveH

I installed 13.3.3 and 6.1.1 the moment they came out to me, yesterday afternoon.


Today, I’ve had my v4 Watch on the charger all night, and put it on this morning a little less than three hours ago. For 45 minutes of that three hours I was working out, but I forgot to log the work out, so it was just running normally. I’ve used 17% of the battery, or ~6% per hour, in 3 hours.

Dec 11, 2019 2:46 PM in response to jkk4_1998

I've had my v4 watch on since about 5:00 a.m. this morning (8:45 hours). It has used 54% of the battery, after installing 13.3 and 6.1.1.


I have not answered any calls on the watch, listened to any music, or logged any exercise. At this rate of usage, by 9:00 a.m. tonight (14 hours after I put the watch on), it will have used 84% of the battery. Before 13.2 and 6.1, the watch used about 47-60% over the same period.

Jan 21, 2020 6:26 PM in response to sparker

So my watch is now back to having improved battery life. Not sure what it could be. I did recently turn back on dictation because I was getting poor battery life with it off and did not think it would be worse with it on. Now for the last 5-6 days, I have lost ~23% battery life with 14+ hours standby and ~2 hours of usage. Huge improvement over what I had been getting.


Good to see but unclear of why. For those also suffering, I would say just hold on and hope that after a bunch of time, it will return.

Jan 21, 2020 7:23 PM in response to anand mehta

I don't know. It's so random. One day I can go easy ~24 hrs on a series 5 with AOD on and another day it's maybe 16. It's significant delta of battery use with out much obvious source. Usage and standby don't typically show much difference in behaviour. I'd like to be able to use the watch as advertised. 4 months later we're still not there. It's frustrating, so I turned AOD off, now I have a Series 4...

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Apple Watch sudden battery drain?

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