iPhone 6(S)(+) Battery drain at night


AppleMythos

macrumors member
Aug 7, 2017
41
25
San Francisco
Hi everyone ! Recently my iPhone started loosing 10-15 % at night. Everything is turned off like WiFi, location ,app background refresh etc. In the battery setting it says that it’s used in screen off but it doesn’t say which app...Does somebody know what causes this ?
have this same problem with my XS. i even go so far as to put it in airplane and low power modes (to test) overnight and it still drops ~10% every night over about 7 hours. never had this problem before.
 

niji

Contributor
Feb 9, 2003
1,494
1,213
tokyo
have you checked Settings/General/Background app refresh to maybe see if it gives a clue?
 

BLBL

macrumors 6502a
Apr 11, 2018
765
106
have this same problem with my XS. i even go so far as to put it in airplane and low power modes (to test) overnight and it still drops ~10% every night over about 7 hours. never had this problem before.
My X started doing exactly the same after I updated to IOS 12.1.4. For example last night it pulled 8% in 9-10 hours with no apps running background in normal mode (I even checked battery chart to confirm nothing was running during night). Some night it pulls even more. I have tested also low power mode and difference was rather small.
With previous IOS versions drain during night was about half of that.

Funny thing is that I have discussed that problem in couple other threads and no one else seems to have this issue after IOS 12.1.4, so I guess it must be something very rare and isolated issue with certain kind of hardware. Could it possibly be some difference between units with Intel and Qualcomm modems or similar?
 
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now i see it

macrumors 601
Jan 2, 2002
4,151
8,162
The charge indicator isn't accurate. Also lower temperatures will affect the reading. Colder temperatures in the morning will show a lower charge level than what they were at warmer night.
Try recalibrating the charge level indicator by using the phone until it reaches about 10%, then charge it all the way up to 100% and 20 minutes longer without using it while it's charging.

Also a worn out battery won't hold a charge like a new one.
 

BLBL

macrumors 6502a
Apr 11, 2018
765
106
Thanks for the tips but I'm afraid they are not helping in this issue. My house room temperature did not change after IOS 12.1.4. Also why charge indicator would suddenly became more inaccurate after IOS 12.1.4? I try to avoid letting battery run very low as it seem to hurt battery, especially those Apple uses seems to be very problematic if let them go very low.

Surely my battery could be worn, as it already has 24 cycles, so it must be normal for degrading and that suddenly happened just at the same time as update from IOS 12.1.3 to 12.1.4.
 

BLBL

macrumors 6502a
Apr 11, 2018
765
106
For weeks? I don't think so. I don't even use iCloud and photo processing should be completed.
 

kildraik

macrumors 6502a
May 7, 2006
828
948
Sounds like power issues.

I’d restore and set up as new, or just take it to the Genius Bar and have them check the internal current on the device. Sounds like a failing logic board PSU.
 

joeblow7777

macrumors 603
Sep 7, 2010
5,997
6,783
Why not charge it while you sleep? Problem solved.
I wouldn't say that solves the problem, just puts a band-aid on it. Something's not right if the phone is losing 10-15% per night.
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Only way to stop it from using power is to turn it off!
You shouldn't have to turn your phone off to not lose that much power overnight in standby.
 

ab06deg

macrumors member
Nov 20, 2016
66
46



I’m having the same issue. Had it on the 8 plus and now on xs (I upgraded 10 days ago). Reset and set up as new didn’t solve the problem. Worst iOS ever, I never had this kind of problems with my phones. Though for my ipads works like a charm. Apple Watch, instead, is the same as iPhone. Looses 15-20% no matter if I put it in airplane mode or not.

And iPad:
 

BLBL

macrumors 6502a
Apr 11, 2018
765
106
Sounds like power issues.

I’d restore and set up as new, or just take it to the Genius Bar and have them check the internal current on the device. Sounds like a failing logic board PSU.
Really? So all in the sudden both X in our family magically blow up their logic board PSU's right after IOS 12.1.4 update?
And yes, there is a huge difference in actual time how often they needs to be charged between the two (has been like that since they were new). The other one easily goes 1-2 days more between charges in actual use and it obviously has stronger battery but still they BOTH lose as much charge overnight (close to 1% per hour) and before IOS 12.1.4 it was about half of that on BOTH.
So if it walks like a duck and quacks like a duck, I guess it is not a unicorn? Or is it?
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Why not charge it while you sleep? Problem solved.
Yeah, bury head in the sand always works, but I'm not one of those who like to do that either. I rather try to find a reason for something rather than just letting it be. In this case I just hope it is not something intentional, like somehow related to Qualcomm legal issues (mine has Intel chips) forcing them to disable some features.
[doublepost=1551691993][/doublepost]



I’m having the same issue. Had it on the 8 plus and now on xs (I upgraded 10 days ago). Reset and set up as new didn’t solve the problem. Worst iOS ever, I never had this kind of problems with my phones. Though for my ipads works like a charm. Apple Watch, instead, is the same as iPhone. Looses 15-20% no matter if I put it in airplane mode or not.
Your IOS battery chart looks pretty much identical to what I have seen in both of our iPhone X. Just like yours, this chart confirms no apps running in background but battery still draining more than normal overnight. Even putting in low power mode does not change much, maybe tiny bit less drain but still way too high. However my iWatch also uses more power than before but not that much as yours.

Do you know if your iPhones have Intel or Qualcomm chipset?

I haven't kept track of my iPad so closely but I think even that uses a little more than usual but it is hard to say for sure as it uses so little power in standby still but usually it did not much drop much all when it was not in use but now it often has lower percentage than the last time I used it.
 
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stueymacd

macrumors member
Sep 21, 2016
91
49
North East, UK
My X has been doing this since the recent update to 12.1.4
The 'Battery Usage by App' screen suggested that the stock Mail app was very high on background activity and sure enough I now regularly 'force close' the mail app and am now back to dropping just 2 or 3% overnight instead of 10-15%
 
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BLBL

macrumors 6502a
Apr 11, 2018
765
106
My X has been doing this since the recent update to 12.1.4
The 'Battery Usage by App' screen suggested that the stock Mail app was very high on background activity and sure enough I now regularly 'force close' the mail app and am now back to dropping just 2 or 3% overnight instead of 10-15%
Mine does not show anything running at night in the battery usage by app screen.
 

AustinIllini

macrumors demi-goddess
Oct 20, 2011
11,085
7,719
Austin, TX
My X has been doing this since the recent update to 12.1.4
The 'Battery Usage by App' screen suggested that the stock Mail app was very high on background activity and sure enough I now regularly 'force close' the mail app and am now back to dropping just 2 or 3% overnight instead of 10-15%
This is the best thing to do. Odds are it's an app issue. iOS isn't a big battery hog. 10-15% battery drain is an Android-level overnight drop.
 
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BLBL

macrumors 6502a
Apr 11, 2018
765
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I'm pretty sure it is some IOS bug that causes this problem in certain type of hardware. What I'm gonna do is to wait for the next IOS and see what happens. I see no reason at this point for sending both of our phones to service center just for getting almost new phones replaced with refurbished (used) ones and then risking the same thing still happening with IOS 12.1.4.
Too big of a risk getting just more problems when there is decent/excellent screen in both phones currently. There is no guarantee what kind of screen is in replacement units it is pure luck with OLEDs and I'm not that luckily in the begin with usually...
 

now i see it

macrumors 601
Jan 2, 2002
4,151
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Just wait it out. iOS bugs will get ironed out in future updates by September.
If it makes you feel any better, my old iPhone has 1012 loadcycles on it and when I shut it off last night it was at 63% (phone turned all the way off). When I turned it back on this morning, the battery was at 48%. But it was cold. When it's warm it doesn't do that. It's definitely showing its age but gets me through the day if I top off.
 

BLBL

macrumors 6502a
Apr 11, 2018
765
106
Looks like my hunch may have been right and this could be Intel related thing. See this article https://www.macrumors.com/2019/03/08/qualcomm-apple-damages-patent-trial/
There is mentioned this patent issue contain technology affecting battery life, so are they simply disabling conflicting technologies in Intel chipset phones in 12.1.4? That could explain why only some peoples are suffering from this. Our both X'es suffering from drain at night right after IOS 12.1.4 are with Intel chipset...:mad:
 

charlituna

macrumors G3
Jun 11, 2008
9,619
804
Los Angeles, CA
you do understand that any computer system has maintenance that it does daily to try to avoid corrupted files etc. and that is generally programmed for times like 2am, 3am. only way to stop those processes is to turn your phone off every day but some of them will probably still happen when you try to boot up, making that take longer
 

BLBL

macrumors 6502a
Apr 11, 2018
765
106
Turn off the phone? How do you suggest to answer to possible phone calls when iPhone must be turned off for nights? Getting a landline perhaps?
In my opinion, obviously the best solution would be Apple to fix what ever in IOS 12.1.4 is causing that.
But I guess that might not happen if the cause for it is what I'm afraid it is.

Like I have mentioned many times, in both of your X'es there is absolutely nothing running during night. Even IOS battery menu confirms there is nothing going on (well, obviously there is but it does not report that).
Of course it is possible that both of our phones developed battery failure the same second when IOS 12.1.4 was installed. By the way, both phones have about 30 charge cycles or under and only couple months old (older is 3-4 months now). Sure batteries will degrade when they age, but seriously suddenly battery that is supposed to last 500 charge cycles doubles battery consumption during night. Sorry for rant, but I just don't get why peoples are willing to accept what ever. :mad:
 
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stefdimi

macrumors newbie
Sep 19, 2009
6
1
Athens Greece
Hi everyone ! Recently my iPhone started loosing 10-15 % at night. Everything is turned off like WiFi, location ,app background refresh etc. In the battery setting it says that it’s used in screen off but it doesn’t say which app...Does somebody know what causes this ?
[doublepost=1552924055][/doublepost]Turn off screen time!...