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

Aug 8, 2021 1:36 PM in response to arham210

Today, my display started flashing every 15 seconds. It gets lighter then it gets darker. I first noticed this when the phone was new and it occasionally would do it every few months but today it started doing it, and it’s actually doing it while I’m typing this. I have closed all other apps and I never use auto brightness.

perhaps this explains why the battery is draining. Possible motherboard issue? Don’t know but I’m going to call AppleCare and initiate a replacement.

Aug 21, 2021 8:57 PM in response to Dogcow-Moof

Will you please stop bleating on about how "this is normal", "one percent drop per month is expected", or "your battery will be replaced under warranty if if drops to 80% within the first 12 months".


Contributors have genuine concerns and your repetitive posts are not helping at all. You've stated your point numerous times, so please, let people have their discussions with like mined people, with similar issues.


I too have battery health issues, similar to others, where my experience with older iPhone's is uniquely different to my iPhone 12. My wife has an iPhone 11, with a much higher battery charge cycle count and hers is still at 100%, whereas mine is lower - this is not normal, so don't try to persuade people that it is.


[Edited by Moderator]


Aug 24, 2021 12:39 AM in response to Dogcow-Moof

Maybe my comparison between my old iPhone 8 and my actual iPhone 12 was someway forced, but I expect that a newer and more modern version of a phone does not deplete the battery this way: we know that iPhone 12 has a larger screen and a more powerful CPU than iPhone 8, but I would expect that battery life would have been improved rather than seeing such a fast depletion.

I understand and respect what you're saying, but numbers are numbers: my iPhone's battery is losing its maximum power too fast (7 percentage point in 8 months), much more than it was on my previous iPhone (and I've intensively used it too).

Aug 24, 2021 11:23 AM in response to Samuel Maffei

Samuel Maffei wrote:

Compared to using your phone.

Compared to using my phone? I don't have an iPhone 12 so comparing your phone to mine would be pointless.


Losing over 10% charge capacity in less than a year of use is unacceptable for a $1000+ phone.

You're entitled to your opinion but it doesn't change the fact that what you're seeing is normal.

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iphone 12 pro max battery health degrading

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