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iPhone 13 Pro iPhone 13 Pro losing 4-5% battery after reboot

Taz Mangus

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.
 
S

Shadowbech

macrumors G3
Oct 18, 2011
9,038
5,894
Taz Mangus said:
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.
Click to expand...
This has been the case for iOS 14,13,12,11 and so forth.
 
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SoYoung

macrumors 68000
Jul 3, 2015
1,545
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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.
 
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Taz Mangus

Taz Mangus

macrumors 604
Mar 10, 2011
7,815
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SoYoung said:
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.
Click to expand...
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

thetechguy98

macrumors member
Original poster
Oct 13, 2021
81
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The Netherlands
Taz Mangus said:
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.
Click to expand...
Thanks for the explanation!
 
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Taz Mangus

Taz Mangus

macrumors 604
Mar 10, 2011
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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.
 
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thetechguy98

thetechguy98

macrumors member
Original poster
Oct 13, 2021
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The Netherlands
Taz Mangus said:
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.
Click to expand...
Good point! Let’s do this.
 
alyssap22

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

PhillyGuy72

macrumors 68040
Sep 13, 2014
3,073
4,650
Philadelphia, PA USA
alyssap22 said:
I just updated to iOS 15.0.2 at 100 % and when it came back on it was @ 94%. Is this normal?
Click to expand...
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%
https://imgur.com/nCmo3gP

...Again stuck on 95%, heavy use. restart. Battery at 88%
https://imgur.com/XxP0T4K

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

thetechguy98

macrumors member
Original poster
Oct 13, 2021
81
12
The Netherlands
PhillyGuy72 said:
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%
https://imgur.com/nCmo3gP

...Again stuck on 95%, heavy use. restart. Battery at 88%
https://imgur.com/XxP0T4K

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?
PhillyGuy72 said:
I read that wrong, actually after updating to a new iOS, % will drop. THAT is normal.

What I posted above..it's not. (sorry)
Click to expand...
PhillyGuy72 said:
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%
https://imgur.com/nCmo3gP

...Again stuck on 95%, heavy use. restart. Battery at 88%
https://imgur.com/XxP0T4K

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?!
Click to expand...
It doesn't seem to look nice. Hopefully, it will be fixed in the next iOS update. Let's hope for the best.
Click to expand...
 
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