iphone 12 pro max battery health degrading

I got my new 128GB 12 Pro Max with blue silicon case on the 11/13 launch day. In the weeks since I’ve noticed the battery health has already dropped to 98%. I’ve only used public releases of iOS and haven’t installed any iOS beta’s that would have enabled extra logging functions that could have negatively impacted battery life and health. Optimized charging has been enabled the whole time, and it’s only been charged with a USB-A cable and an Apple 5W charger. I don’t see any apps standing out as battery hogs, and I’m using my phone as much as I did my 11 Pro Max. I’m shocked to see the battery health drop below 100% in the first 6 weeks, and at this rate it will be below 90% by summer 2021. Has anyone else noticed their battery health has dropped below 100% on a 12 Pro Max?

iPhone 12 Pro Max, iOS 14

Posted on Jan 3, 2021 10:50 AM

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Posted on Apr 19, 2021 5:51 PM

It has nothing to do with chronological time. It is “80% is normal after 500 full charge cycles”. A full charge cycle is from 0 to 100% (or combinations that add up to 100% such as 20% to 70% twice). And you should never let it go to 0% intentionally; that WILL shorten the capacity of the battery if it happens frequently. Ideally, charge it when it gets to 20%, and charge it overnight, every night, with Optimized charging enabled.

827 replies

Jul 16, 2021 9:33 AM in response to stretch23

I’m on 96% as of 16th July 2021... I only purchased my phone on the 4th December 2020. I’ve notice the battery life on these are shocking compared to previous years but there’s definitely some optimisation that needs to be done because it’s atrocious. In the 4 years of iPhone my iPhone 7 it has only reduced to 82%, so it’s technically degrading twice as fast as my iPhone 7 did. And I’ve use nothing but the genuine lead that comes with the phone, I use optimised charging, I have reduced battery consumption due to changing a bunch of tracking settings and applications but still. Also, with the camera open my battery reduces by 2-3% a minute, same goes for videos but sometimes more. There’s clearly something very wrong here.


[Edited by Moderator]

Aug 21, 2021 8:25 PM in response to stretch23

Apparently, the design capacity of my iPhone 12 is 2798 mAh, not 2815 as stated by Apple. Having bought it from new in November 2020, it's now displaying a battery health of 97% maximum capacity, with a charge count of 30, very low usage of around 15% battery per day and charging once every couple of days.


My wife has an iPhone 11, bought the same time, with a design capacity of 3092 mAh, charge count of 45 and yet her battery health is displaying 100% maximum capacity.


All I can say is that the battery characteristics of the iPhone 12, is very much different to any other iPhone I've owned - a part of me would prefer Apple to turn this feature off, as it's too distracting and perhaps something we don't need to be preoccupied by.

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iphone 12 pro max battery health degrading

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