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

Jan 11, 2022 7:32 AM in response to Roland0000

Roland0000 wrote:

Mine is at 88% after 10 months of use. Very disappointed with the battery health and performance, I wonder what my battery health will be after 2 years… for sure way below 80%. My use is mainly social media and I try to avoid overheating.
Anyone knows if the warranty covers this type of problem?
https://discussions.apple.com/content/attachment/8796775d-5987-4ad2-bd73-447fc369175c


Not particularly. It's really more like a tire mileage warranty. An analogy would be that you have to wait until treadwear hits the wear bars before being able to access a mileage warranty. But one can't take a gauge and ask for replacement before it's considered worn, just because it seems like it's wearing prematurely Most tire warranties have time limits too. I get that it's unlikely that premature wear is likely to bring down a battery to 80% within the limited warranty period, but under AppleCare it might.


I don't really know of too many electronic device makers that even have any kind of battery health monitoring like Apple. It's been built in to most Macs for some time right in the system information. Most don't have any kind of indication of wear until they recommend replacement.


But in the end, battery replacement is relatively inexpensive. It's actually fairly simple with Apple. Try getting a battery replacement in a newer Samsung phone that's uses glued assembly.

Jan 17, 2022 11:58 PM in response to amalia185

amalia185 wrote:
The point is that I believe the batteries should last longer. A new phone and quickly it went to 89 % maximum capacity .


After how long? Apple's iPhone battery rating is for 80% battery health after 500 full charge-discharge cycles. Now charge-discharge cycles aren't a perfect way to correlate usage to battery wear, but it's what they use.


An alternative to achieve better battery longevity is to oversize the battery and use less of the capacity. iPad battery longevity is rated at 80% battery health after 1000 full charge-discharge cycles. Or keep it the same size and advertise shorter run-times, which is not a great marketing strategy.


But Apple doesn't have access to any kind of special battery technology. They have suppliers which are often the same as their competitors. And they all lose capacity as they're used. But they also have a repair infrastructure to replace the batteries for a fraction of the cost of a new device.

Jan 25, 2022 8:45 PM in response to stretch23

I bought my iPhone 12 Pro Max 128gb in February 2021.


Sadly I’m on 90% battery health.


At one point the % dropped a few digits within a month.


I went to Apple and they said because it’s not under 80% they can’t change the battery even tho I have warranty or whatever that is called. And I have to pay £ for it. I don’t get it. I am realising slow performance & very little battery life compared to when I first got it I was getting around 9-10 hours. Now it’s nothing like that and I get the most 6-7 hours if most.


recently my microphone had an issue while recording videos it wouldn’t pick anything up.

phone crashed a lot too & slow performance was a big issue.


I don’t know what to do.


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iphone 12 pro max battery health degrading

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