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Drogba11

macrumors 6502
Original poster
Jan 29, 2018
332
857
Anyone see a significant drop in battery maximum capacity after installing iOS 17

My 14 Pro Max has dropped to 90%

IMG_3067.jpeg
 

Aftermath747

macrumors 6502
Sep 16, 2015
264
211
My launch 13 Pro Max still with original battery was 99% before and after the update.

I am glad I didn’t get a 14 Pro/Max those health percentages seem to be very low for only one year of use.
I’ve upgraded every year since the 7 and never seen a battery degrade like the 14PM. 89% for me before and after the update.
 
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Brooke795

macrumors 6502a
Feb 17, 2016
717
1,217
San Diego
I’m 92% before and after the update but I just updated so I’ll keep an eye on it. I had beta 8 on it before. Kinda glad to be off beta now. Maybe my % won’t drop as fast.
 

haruhiko

macrumors 604
Sep 29, 2009
6,535
5,882
My launch 13 Pro Max still with original battery was 99% before and after the update.

I am glad I didn’t get a 14 Pro/Max those health percentages seem to be very low for only one year of use.
Yeah. I truly regret getting the 14 Pro due to this. I have to get rid of it this year due to the terrible heat management and (therefore) battery health.
 

ade555

macrumors member
Apr 14, 2021
92
48
I’m on 3 year old 12 and battery before and after at 87%, I was bit worried before the update but nothing changed
 

deano1972

macrumors 6502a
Sep 16, 2016
557
239
United Kingdom
I’m on 3 year old 12 and battery before and after at 87%, I was bit worried before the update but nothing changed

I’m also using a 3 year old 12 with battery capacity at 83% here. How are you finding battery life on IOS 17 so far compared with 16.6.
I’m deciding whether or not to update yet.
 

ade555

macrumors member
Apr 14, 2021
92
48
I’m also using a 3 year old 12 with battery capacity at 83% here. How are you finding battery life on IOS 17 so far compared with 16.6.
I’m deciding whether or not to update yet.
I’m going to be honest with you as I only installed yesterday so would need few days, I’m home for next 4 so don’t use phone that much, I know one thing when out and about and on 5g just eats battery on ios16, but I always have means to charge the phone so I never pay that much attention how long will last, this might well be 5g thing and not iOS, also my usage very so much where I can go all then without charging to needed to charge my phone twice in a day 😳
 

avheatherim

macrumors member
Sep 11, 2023
35
40
My launch 13 Pro Max still with original battery was 99% before and after the update.

I am glad I didn’t get a 14 Pro/Max those health percentages seem to be very low for only one year of use.
How? My launch 13PM is at 84%. I only charge overnight, rarely during the day or in the car. Although I am almost totally wireless charging... maybe that's the cause.

15PM arrives tomorrow and I want to give it the best chance possible...
 

jpdunn13

macrumors member
Sep 19, 2022
98
99
I have a hard time understanding how installing software can change the health of the battery. There may be a change in the algorithm used to monitor the health and reporting of the battery condition, but iOS15, 16, 17, 18, etc. cannot make the battery degrade. Only charge cycles and possibly rapid charging can do that. Am I wrong?
 
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tosbsas

macrumors 65816
Nov 22, 2008
1,277
427
Lima, Peru
I have a hard time understanding how installing software can change the health of the battery. There may be a change in the algorithm used to monitor the health and reporting of the battery condition, but iOS15, 16, 17, 18, etc. cannot make the battery degrade. Only charge cycles and possibly rapid charging can do that. Am I wrong?
yes and no. Software Update and in nay case network reset recalculates the battery health percentage. So, you are right, update does not reduce battery health by itself, but it aligns the numbers to reality (-:)
 

Pixels7

macrumors member
Nov 17, 2020
60
34
My iPhone 11 (bought in February 2021) was on 91% battery health before and after updating from iOS 15.?.? to 17 and it is still at 91% after updating to 17.0.1. I was afraid to update, due to battery anxiety. But all is well luckily.
 

DaveyVigs

macrumors regular
Sep 28, 2016
177
175
How? My launch 13PM is at 84%. I only charge overnight, rarely during the day or in the car. Although I am almost totally wireless charging... maybe that's the cause.

15PM arrives tomorrow and I want to give it the best chance possible...
Yikes. So I rarely ever charge overnight, I usually charge for an hour a day max. I don’t use wireless charging unless I have to or can’t find a lightning cable.

Then again I also don’t have a lot of apps and don’t use my phone much during the day. I go to bed with the battery around 60% each night and charge it for a hour or less when getting ready in the morning.

I hope the new iPhone 15 setting to stop charging at 80% helps. Also it sounds like they have a cycle counter now, finally.

All in all it makes me not want to trade in my 13PM this year or next.
 
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