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iOS 13.5.1 battery drain

The battery drain from background activity in iOS 13.5.1 is horrible. Happens on several apps, currently Bloom berg and Teamsnap. Same problem on my iPad and my wife's iPhone Xs. Come on Apple, this needs to be fix now!

iPhone XS

Posted on Jun 5, 2020 8:28 PM

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Question marked as Top-ranking reply

Posted on Jun 8, 2020 8:04 AM

in that case it is apps that have not been modified to run on the new OS and have runaway background usage, Viber fir example.

or a busted phone.

Nothing in 13.5.1 itself is causing this.

So to test this ( yes effort required)

  • backup
  • restore to factory settings as though you were selling it - see https://support.apple.com/en-us/HT201351
  • Set it up with your apple account
  • Check battery usage in that vanilla environment.
  • Restore from backup.


636 replies

Jun 11, 2020 6:26 PM in response to TexThomas

Also, there is something else I have noticed since I updated to 13.5.1; my iPad used to turn on as soon as I plugged the charger, after the update that behaviour is gone, I have to manually do it.

By the way, yesterday I left my iPad fully charged at 100% and overnight it went to 58%, all apps closed and fully turned off.

Hope Apple releases a fix soon, I don't see how a mobile device should be plugged all day long to be used, the practicality gets lost.

Jun 11, 2020 11:29 PM in response to LD150

And the strange thing about the “Buienradar”... I don’t know if you understand Dutch? It’s an app to warn me when a shower comes up.

I can do a forced shut down, but he still gives me a message when he needs to, although no background activity.

And indeed, while running in the background, the battery consumption isn’t very high.

When iCulture does the same, the battery drains much quicker.


Conclusion: I will terminate my research to solve this. Hopefully it’s fixed with the 13.6 release. Maybe I can try the 13.6 bèta if I have some spare time. Don’t know for now.

Jun 12, 2020 8:26 AM in response to TexThomas

I posted a few days ago that I was experiencing rapid drain when on standby on a clean iOS install of 13.5.1 on my iPad. I’m now on day 5, still with a clean install and things seem to be getter better. Day 1 I lost around 40% on standby overnight. Day 5 I lost around 15%. I’m wondering whether 13.5 introduced a battery update which required a few days to calibrate?


edit: I just remembered that I turned off all location services yesterday, which may have resulted in the difference observed. I will turn location services back on and provide update.

Jun 12, 2020 8:52 AM in response to cbdoc

I have to say that over the past 24 hours my phone has miraculously started to get better. As the other person posted above it’s been happening in increments and now the battery is not draining as fast. I would say I’m about 70% of the way back to how things were. But I just checked and for some reason Siri is still active and using about 27% of my battery even though I have it disabled across-the-board. The other day it was using 45% even though it was off

Jun 12, 2020 10:19 AM in response to LD150

Recharged my battery overnight, from the charger from 7.39am. Now, still 72%. Reason: some apps running in the background again and a weak signal this afternoon. (a weak signal also consumes very much energy on an iPhone.)


Although the background running apps were shut down, they still use a little energy.


I can handle this. I've read iOS 13.6 will be released by the end of june, the beginning of july. 14 more days. It's maybe a wise decision to wait and not to install the beta.

But I really hope Apple fixed this problem in 13.6

Jun 13, 2020 7:15 PM in response to TexThomas

I've updated my XR to 13.5.1 via iTunes a couple days ago, and I can definitely tell that it is behaving abnormally. XR used to have great battery performance. Before update, I usually had over 40% remaining when school was over. While now, it drains super fast no matter the screen is on or off. Even kept overnight, it "automatically" drained from 100% to 52%, without doing anything. I've also tried low power mode but nothing changed.


Siri is disabled and background refresh either. Maximum capacity is currently at 96% after a year and supporting normal peak performance. I've restore it once but it seems that there is no difference.


By the way, my old iPad Mini 2 even lives longer when idle.

Jun 15, 2020 8:54 AM in response to KimiChiu

OK you have some in-depth knowledge, we are just guessing..

Are you saying a change in iOS 13.5.1 (BGScheduleTask) was made and developers were not told to change their apps in the bulletins?

Do they show up in the battery settings graphs?

I only had one free app run away like that in background and I ditched it, but none of my other apps do it as far as I know.

Jun 15, 2020 10:18 AM in response to KimiChiu

Thanks for this feedback Kimi, I thought I was losing my mind! My wife’s 2 year old iPhone X with iOS 13.4.1 still lasts an entire day and still has 70% battery life, I’m talking from 8am to 7pm, only down to 70% by the evening from normal usage. My 3 month old iPhone 11 Pro used to have the exact same battery performance, I never really noticed my battery getting low because there wasn’t any drain until upgrading to iOS from 13.4.1 to 13.5.1. Now I have done every sequence to reinstall iOS 13.5.1 and even rolled back to 13.5, DFU mode, restore from backup, setup as new phone and literally had to install each app manually etc. I did this about 5 times and back on 13.5.1. I’ve had Apple support investigate and run diagnostics both in-store and via remote diagnostics and there are no hardware issues. All I’m told is, read this article about battery life, turn off background app refresh etc. so not really helpful because I have already done everything possible to identify a source of the battery drain. My only personal conclusion is that it’s iOS itself causing the battery drain which doesn’t show up in battery usage. I’m even experiencing battery step drops ie my battery is at 70% and I literally watched it drop more than 10% in 5 minutes without any apps open, battery usage just shows a step drop in the graph, no apps had usage. I’m happy to help test anything right now to aid in resolving this issue.

Jun 15, 2020 10:23 PM in response to TexThomas

I have the same problem on my IPhone 7, the charging won't go up but dropping if I use while charging, instead the battery percentage dropping when plugged in, put it on a overnight charge, it did not hit 100% charged. Apart from that, it drains in hours without heavy usage. Apple PLEASE DO SOMETHING, 13.5.1 is not working as loads of users preferred. Don't mock us to buy new phone because of this update.

Jun 16, 2020 2:20 AM in response to LD150

These steps did help me get my charge back up to 100% on iOS 13.5.1. It would not go more than 80% with Battery Optimisation on, if I left overnight or during the day, always 80%. I followed the exact steps above with battery optimisation turned off and I can get my charge back up to 100%.


The and "my" battery drain is another story which this thread is all about :)


Thanks Peter

iOS 13.5.1 battery drain

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