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Taz Mangus

macrumors 604
Mar 10, 2011
7,815
3,504
There is an issue in iOS 15 where the battery percentage is over reported. If you run Coconut Battery app on macOS and look at your battery usage, you will see that the battery percentage shown by iOS is always higher then actual. So when you restart your phone, iOS is reading the actual battery percentage. This gives the appearance that there are large drops in battery on restart, when in fact all you are seeing is the actual percentage.

Either this is intentional or it is a bug that hopefully will be fixed in an iOS 15 point release.
 

Shadowbech

macrumors G3
Oct 18, 2011
9,038
5,894
There is an issue in iOS 15 where the battery percentage is over reported. If you run Coconut Battery app on macOS and look at your battery usage, you will see that the battery percentage shown by iOS is always higher then actual. So when you restart your phone, iOS is reading the actual battery percentage. This gives the appearance that there are large drops in battery on restart, when in fact all you are seeing is the actual percentage.

Either this is intentional or it is a bug that hopefully will be fixed in an iOS 15 point release.
This has been the case for iOS 14,13,12,11 and so forth.
 

SoYoung

macrumors 65816
Jul 3, 2015
1,464
854
I don’t know if it’s an iOS 15 issue or a specific iPhone 13 issue because all my other devices don’t have this issue. Maybe it’s due to the larger batteries but one thing is sure, there’s a problem with the iPhone 13 pro max reading battery right now.
 

Taz Mangus

macrumors 604
Mar 10, 2011
7,815
3,504
I don’t know if it’s an iOS 15 issue or a specific iPhone 13 issue because all my other devices don’t have this issue. Maybe it’s due to the larger batteries but one thing is sure, there’s a problem with the iPhone 13 pro max reading battery right now.
You have verified that with Cocnut Battery and you see both iOS and Cconut Battery report the same battery percentage on your other devices?
 

thetechguy98

macrumors member
Original poster
Oct 13, 2021
81
12
The Netherlands
There is an issue in iOS 15 where the battery percentage is over reported. If you run Coconut Battery app on macOS and look at your battery usage, you will see that the battery percentage shown by iOS is always higher then actual. So when you restart your phone, iOS is reading the actual battery percentage. This gives the appearance that there are large drops in battery on restart, when in fact all you are seeing is the actual percentage.

Either this is intentional or it is a bug that hopefully will be fixed in an iOS 15 point release.
Thanks for the explanation!
 
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Taz Mangus

macrumors 604
Mar 10, 2011
7,815
3,504
For whatever its worth, I opened Case #101516762166 with a senior level advisor. Now what Apple will do with this, who knows. If enough people call into Apple Support or use Apple Feedback on this, Apple *might* just change it to be more accurate.
 

thetechguy98

macrumors member
Original poster
Oct 13, 2021
81
12
The Netherlands
For whatever its worth, I opened Case #101516762166 with a senior level advisor. Now what Apple will do with this, who knows. If enough people call into Apple Support or use Apple Feedback on this, Apple *might* just change it to be more accurate.
Good point! Let’s do this.
 

alyssap22

macrumors regular
Jun 13, 2014
178
125
I just updated to iOS 15.0.2 at 100 % and when it came back on it was @ 94%. Is this normal?
 

PhillyGuy72

macrumors 68040
Sep 13, 2014
3,044
4,488
Philadelphia, PA USA
I just updated to iOS 15.0.2 at 100 % and when it came back on it was @ 94%. Is this normal?
Mine is "stuck", clearly a bug IMO on this 15.0.2. I downgraded, also just erased the phone and will start over. (maybe it will work..no idea. About to find out)

100% for hours and hours, it only updates the % when I reboot the phone (not hard reset), simply shut down, turn on. So I really am not getting an accurate reading of what % of phone life I have during the day.

100% overnight. Reboot showed 95%, the reboot shows 92%

...Again stuck on 95%, heavy use. restart. Battery at 88%

Also battery health 21 days ago ...heck 7 days ago on Coconut was 103-104%
After 15.0.2, Coconut now reads 94-95% battery health.
** iPhone shows "100% battery health"


And I really hope THAT is a bug, ...really, 8-10% health drop after this update?!
 
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thetechguy98

macrumors member
Original poster
Oct 13, 2021
81
12
The Netherlands
Mine is "stuck", clearly a bug IMO on this 15.0.2. I downgraded, also just erased the phone and will start over. (maybe it will work..no idea. About to find out)

100% for hours and hours, it only updates the % when I reboot the phone (not hard reset), simply shut down, turn on. So I really am not getting an accurate reading of what % of phone life I have during the day.

100% overnight. Reboot showed 95%, the reboot shows 92%

...Again stuck on 95%, heavy use. restart. Battery at 88%

Also battery health 21 days ago ...heck 7 days ago on Coconut was 103-104%
After 15.0.2, Coconut now reads 94-95% battery health.
** iPhone shows "100% battery health"


And I really hope THAT is a bug, ...really, 8-10% health drop after this update?
I read that wrong, actually after updating to a new iOS, % will drop. THAT is normal.

What I posted above..it's not. (sorry)
Mine is "stuck", clearly a bug IMO on this 15.0.2. I downgraded, also just erased the phone and will start over. (maybe it will work..no idea. About to find out)

100% for hours and hours, it only updates the % when I reboot the phone (not hard reset), simply shut down, turn on. So I really am not getting an accurate reading of what % of phone life I have during the day.

100% overnight. Reboot showed 95%, the reboot shows 92%

...Again stuck on 95%, heavy use. restart. Battery at 88%

Also battery health 21 days ago ...heck 7 days ago on Coconut was 103-104%
After 15.0.2, Coconut now reads 94-95% battery health.
** iPhone shows "100% battery health"


And I really hope THAT is a bug, ...really, 8-10% health drop after this update?!
It doesn't seem to look nice. Hopefully, it will be fixed in the next iOS update. Let's hope for the best.
 
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