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iPhone XR Battery percentage going down overnight?

Ridan

macrumors newbie
Original poster
Dec 3, 2018
8
0
Hi, I recently bought an iPhone XR and my battery goes down about 5% overnight and I do not know why. The Screen On and Off usage time is at 0 minutes, I turn off background app refresh, I put on Do Not Disturb overnight yet it still goes down quite a bit. My battery health is at 100%. What could it possibly be?

I already tried contacting Apple Support but they couldn't really help. They just directed me to the battery health page which I already read before...

I attached a picture of my battery usage. As you can see nothing in use.
 

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now i see it

macrumors 603
Jan 2, 2002
5,815
11,937
Avoid checking battery drain when the charge indicator started at 100%.
On an iPhone, 100% charge (not battery health) is anywhere between 94% to 100% charged depending on how long the charger what left connected and how much time has passed since then.

The battery charge indicator could say 100% when it's really at 95% and if it drops a percent or two overnight, which is normal, it could then say 93% charge.

As an experiment, charge the phone to 80% then turn on Battery/Low Power Mode, then turn on Airplane Mode- then lock the phone overnight. It shouldn't drop more than 1-2% if at all
 
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Ridan

macrumors newbie
Original poster
Dec 3, 2018
8
0
Avoid checking battery drain when the charge indicator started at 100%.
On an iPhone, 100% charge (not battery health) is anywhere between 94% to 100% charged depending on how long the charger what left connected and how much time has passed since then.

The battery charge indicator could say 100% when it's really at 95% and if it drops a percent or two overnight, which is normal, it could then say 93% charge.

As an experiment, charge the phone to 80% then turn on Battery/Low Power Mode, then turn on Airplane Mode- then lock the phone overnight. It shouldn't drop more than 1-2% if at all

Please check my attached picture. I left my phone at 75% overnight not 100%.
 
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Ridan

macrumors newbie
Original poster
Dec 3, 2018
8
0
Not much you can do as 5% is not a whole lot and may be normal.

Losing 5% is not normal especially when you just bought it. I checked online and most other people lose 1-2% at most and my screen time is at 0 minutes which means nothing was being used so something is reducing my battery and I can't find the answer.
 
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EM2013

macrumors 68020
Sep 2, 2013
2,190
1,972
I’ll never understand why people don’t leave their devices charging over night.

Not harmful to the battery and you don’t have to obsess over battery drain.
 
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The Game 161

macrumors Core
Dec 15, 2010
23,709
12,919
UK
5% is nothing really...i could lose 10-14% overnight if i left it off the charge during NBA season. It’s why i always charge at night no matter what % the phone is at.
 
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Ridan

macrumors newbie
Original poster
Dec 3, 2018
8
0
I’ll never understand why people don’t leave their devices charging over night.

Not harmful to the battery and you don’t have to obsess over battery drain.

Because that is not the solution to my problem. The problem is that I have a significant amount of battery drain on a new phone which can possibly become worse in the future so I want to troubleshoot it asap.
 
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Ridan

macrumors newbie
Original poster
Dec 3, 2018
8
0
23rd July battery drain:






24th July battery drain:

 
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JBGoode

macrumors 6502a
Jun 16, 2018
898
1,322
If you have the Facebook app on your phone (and probably other apps)it will cause drain on your phone overnight if left open in the background. This happens even if you have refresh disabled and it won't show that the app used battery. I just read an article about this and that app is certainly busy.

I have it installed on my phone but never use it in favor of the browser version. One day I used it and my phone went from 100% to about 95% overnight which was unusual as it normally stays at 100% (or sometimes 99%). This happened a couple of nights in a row and I didn't think it was an app problem until I read this article about Facebook/battery drain. I killed the app and the drain issue stopped.

Kill all of your apps at night and see if the drain issue is resolved. If it is, kill a different one each night (starting with Facebook) to see you can pinpoint the one causing issues.
 
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Ridan

macrumors newbie
Original poster
Dec 3, 2018
8
0
If you have the Facebook app on your phone (and probably other apps)it will cause drain on your phone overnight if left open in the background. This happens even if you have refresh disabled and it won't show that the app used battery. I just read an article about this and that app is certainly busy.

I have it installed on my phone but never use it in favor of the browser version. One day I used it and my phone went from 100% to about 95% overnight which was unusual as it normally stays at 100% (or sometimes 99%). This happened a couple of nights in a row and I didn't think it was an app problem until I read this article about Facebook/battery drain. I killed the app and the drain issue stopped.

Kill all of your apps at night and see if the drain issue is resolved. If it is, kill a different one each night (starting with Facebook) to see you can pinpoint the one causing issues.

I don't leave any apps open nor do I use facebook.
 
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BlankStar

macrumors 6502a
Aug 13, 2004
725
639
Belgium
iOS is always doing stuff. For example, like MacOS there are several maintenance processes that rearrange files and optimise caches, etc. These run when you haven't used your phone for a while and stop when you unlock (so they don't use CPU/RAM, etc when you're using your phone).

All these things cost battery. The only way to make sure the battery doesn't drop, is turn the phone off ;-)
 
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