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iOS 15.4 battery drain

mkrizan4

mkrizan4

macrumors 6502
Original poster
Dec 3, 2016
266
261
I have huge battery drains overnight on my iPhone 13 PM. Ever since I updated to 15.4

When I go into battery section in the settings and check the time when I was asleep, I cannot see any application on the list during those hours.

I lose about 10-12% overnight which I never did before.. Did a force restart the other day, no luck. I'm kinda avoiding the Erase all data and settings option because I really like how I have it set up now..

Anyone else? :(
 
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My battery on iPhone 12 Pro with 15.4 has been quite poor, find I have to charge early evening (fully charged in morning). I did a complete reset and wipe but it’s made little difference
 
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13 Pro Max here and battery life has been outstanding since I got it. I initially thought my experience was so much better than the posts I’ve read through because I had the newest larger phone with a bigger battery, but must just be an individual user issue. I use my phone extensively every day and could easily go to charging every other day with no issues.
 
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Apple’s just buttering us up for the iPhone 14 Pro Max and its Longest battery life ever in iPhone™. Maybe they’re secretly hoping that by the time September rolls around we’ve forgotten our phones once had decent battery life and are eager to shell out for new ones.

Rinse and repeat.
 
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mkrizan4 said:
I have huge battery drains overnight on my iPhone 13 PM. Ever since I updated to 15.4

When I go into battery section in the settings and check the time when I was asleep, I cannot see any application on the list during those hours.

I lose about 10-12% overnight which I never did before.. Did a force restart the other day, no luck. I'm kinda avoiding the Erase all data and settings option because I really like how I have it set up now..

Anyone else? :(
Click to expand...
Haven’t been seeing overnight battery drain, 13 pro max, iOS 15.4.

Do you have background app refresh turned on?

1648064867490.jpeg
 
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LFC2020 said:
Haven’t been seeing overnight battery drain, 13 pro max, iOS 15.4.

Do you have background app refresh turned on?

View attachment 1979348
Click to expand...
I suspect it is related to specific apps. I have background app refresh enabled for almost all of my apps, only a couple are turned off. I also have location services enabled for almost everything. If I leave my fully charged phone untouched for 8 hours, a very rare occurrence, the battery is still near 100% if not at 100. I have always found that screen on time is the primary determinant of battery charge and other than a notification, and I get a lot of them, lighting up the screen for a second or two, if I’m not actively using the device the battery barely budges. I rarely even connect my phone to the charger when using Apple Maps, unless on a longer distance drive, mostly use the phone screen and maps not CarPlay. iOS 15 has had extremely good battery performance (on my devices), hope 16 continues this.
 
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papbot said:
I suspect it is related to specific apps. I have background app refresh enabled for almost all of my apps, only a couple are turned off. I also have location services enabled for almost everything. If I leave my fully charged phone untouched for 8 hours, a very rare occurrence, the battery is still near 100% if not at 100. I have always found that screen on time is the primary determinant of battery charge and other than a notification, and I get a lot of them, lighting up the screen for a second or two, if I’m not actively using the device the battery barely budges. I rarely even connect my phone to the charger when using Apple Maps, unless on a longer distance drive, mostly use the phone screen and maps not CarPlay. iOS 15 has had extremely good battery performance (on my devices), hope 16 continues this.
Click to expand...
Is there a reason why you leave background app refresh on? I always turn mine off on every iPhone I get.
 
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LFC2020 said:
Is there a reason why you leave background app refresh on? I always turn mine off on every iPhone I get.
Click to expand...
There are certain ones, some weather apps and others that do update their info regularly. One weather app gives me a numerical display of the current temperature without launching the app, it can’t do that if that’s turned off. And I’ve never had any real reason to turn it off except for a few apps that would not gain any useful functionality with it turned on. Plus I’ve never had any battery issues except once years ago due to one specific app that finally resolved the problem. If I’m not having issues I don’t waste time looking for them.
 
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auxbuss said:
You can suspect all you like, the facts are different.

Here ya go.


View attachment 1979396
Also, zero problem on iOS14 and prior. This started with 15.3, the first 15 I installed.
Click to expand...
I would still suspect some app or a background process stuck running. In such a situation I would do a forced shutdown that should stop any such process, at least that’s what I did years ago when I did have an issue with an app. We didn’t have a battery app back then to point anything out. Of course it could just be a defective battery that the software finally borked. If you have a recent device that should be covered by the warranty.
 
papbot said:
I would still suspect some app or a background process stuck running. In such a situation I would do a forced shutdown that should stop any such process, at least that’s what I did years ago when I did have an issue with an app. We didn’t have a battery app back then to point anything out. Of course it could just be a defective battery that the software finally borked. If you have a recent device that should be covered by the warranty.
Click to expand...
284EB0C9-1BB8-406C-BC03-A697ADABF862.jpeg
 
papbot said:
I would still suspect some app or a background process stuck running. In such a situation I would do a forced shutdown that should stop any such process, at least that’s what I did years ago when I did have an issue with an app. We didn’t have a battery app back then to point anything out. Of course it could just be a defective battery that the software finally borked. If you have a recent device that should be covered by the warranty.
Click to expand...
Sigh. It was fine on iOS14.

There are no stuck apps. There are no stuck background processes, unless they are Apple's.

But best we stop here, because if my facts can't dissuade you from you suspicions, then there's no progress to be made.
 
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auxbuss said:
Oh my, I do hope you understand that this proves nothing. You can see that, right?
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It does prove that you have a problem that not many do. If it was widespread we’d see it in news outlets not just this thread. You’re no longer on a beta, ios 15.4 is a general release. If it did something to your battery get Apple to take care of it. Don’t wait for some magical update to fix it, might make it worse. If my battery were crashing on a recent device my first step would be at a store, if appointments are available in your area. Let them test it and offer a solution. You won’t get it here.
 
I had been on 14.8.1 on my iPhone 12 mini since whenever that was released, until last weekend. I had been seeing the battery drain threads with some mentions of the 12 mini. I always have a policy of waiting a few months to update to the yearly round number version. When the .4 came out I thought this should be plenty of time to fix the major issues.

Last weekend I did an iTunes Restore to 15.4 and "set up as a new phone." I found that you just turn off Find My before you begin. I made a couple of hours to do it and it was also a good time to go through my apps and see which ones are really useful. I very much recommend this approach to updating because it just minimises problems and it's only an OS. New features in the new version are nice but things like battery drain and performance issues take the gloss off expensive smartphones. I go through this once a year now.

Mind you, I can zip through setup options because I do these steps at work in IT regularly.

I have had no problems at all on 15.4, but I'm someone who turns off Background App Refresh and Notifications for everything except things I actually use and want to know about and Location is set to While Using The App for just about everything. (I go into the Facebook app semi-regularly, but notifications are completely turned off! 😁)
 
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I have an 11 Pro, my wife has a 12 Pro Max. Installed 13.4 the day it came out.

Battery has been COMPLETE crap for both of us.
 
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My iPhone X has had excellent battery life on 15.4. I updated using iTunes (full 5.5gb) and everything has been working well. Storage compiling used to take a good minute on 15.3.1, it's back to normal (a couple of seconds) on 15.4 so no real complaints so far.
 
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auxbuss said:
Sigh. It was fine on iOS14.

There are no stuck apps. There are no stuck background processes, unless they are Apple's.

But best we stop here, because if my facts can't dissuade you from you suspicions, then there's no progress to be made.
Click to expand...
What does the Battery screen show as the apps that ate battery the most over the previous 24 hours?
 
MartyvH said:
I had been on 14.8.1 on my iPhone 12 mini since whenever that was released, until last weekend. I had been seeing the battery drain threads with some mentions of the 12 mini. I always have a policy of waiting a few months to update to the yearly round number version. When the .4 came out I thought this should be plenty of time to fix the major issues.

Last weekend I did an iTunes Restore to 15.4 and "set up as a new phone." I found that you just turn off Find My before you begin. I made a couple of hours to do it and it was also a good time to go through my apps and see which ones are really useful. I very much recommend this approach to updating because it just minimises problems and it's only an OS. New features in the new version are nice but things like battery drain and performance issues take the gloss off expensive smartphones. I go through this once a year now.

Mind you, I can zip through setup options because I do these steps at work in IT regularly.

I have had no problems at all on 15.4, but I'm someone who turns off Background App Refresh and Notifications for everything except things I actually use and want to know about and Location is set to While Using The App for just about everything. (I go into the Facebook app semi-regularly, but notifications are completely turned off! ?)
Click to expand...
I just completed a Recovery Mode Restore and setup as a new device. I wa having an issue related to marking text in Safari. After I did the setup as new the issue is now gone. I don’t even remember the last time I setup an iPhone as a new device. Like you, I had the chance to clean house and not install apps I no longer are using. It does take a fair bit of time setting up an iPhone from scratch but sometimes that is what is needed to be done.
 
auxbuss said:
You can suspect all you like, the facts are different.

Here ya go.


View attachment 1979396
Also, zero problem on iOS14 and prior. This started with 15.3, the first 15 I installed.
Click to expand...
I hate to say this but you might need to try a clean install and setup as a new device. That is the only way you can see if it is the OS or something that you have installed or maybe something got corrupted. I guess you have to decide which is worse, living with the poor battery life or the time it takes to setup your phone from scratch.

For me, the text marking issue was one that I did not want to continue having.

And if you do setup as a new device and you are still having bad battery drain, give Apple a call and open a case.
 
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Who would have thought, 15.4 is a patch, not a fix. For me personally battery life is the same as previously: meh-garbage
Don’t expect a fix.
 
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