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

May 30, 2021 8:55 AM in response to Dogcow-Moof

This thread has people with different issues, that are all getting jumbled together. There are a few people who actually do appear to have defective batteries. And there are a lot of people who have perfectly normal batteries that they want to be better than normal. Sort of like the Prairie Home Companions quote; “…and all the children are above average”.


The thread is really getting boring; I’m leaving it.

May 31, 2021 10:25 PM in response to Dogcow-Moof

Definitely more than that I am afraid. Usually, I can get an iPhone, and sell it in 2 to 3 years for a new model, still with a reasonable amount of battery life left for the buyer. With the current trend, that means I will have to have my iPhone service no matter what. Having a $1200 phone that guarantees a visit to the service center in approximately a year's time isn't acceptable, not to mention sometimes booking a Genius Bar appointment, having the data backup as late as possible to avoid loss of data, and may need to go without the iPhone for a few days is kind of stressful for many people.

Jun 9, 2021 9:49 PM in response to Dogcow-Moof

It hasn’t dropped slowly over the past 7 months. It’s dropped like 4-5% in the past two or three months. THAT IS NOT NORMAL. Every 5-10 days (as mentioned in my previous comment) it drops another 1% so that’s not every month that’s every 5-10 days. Which it should not be doing! I treat this phone as I treated my other iPhones but yet this one’s battery health is literally the absolute worst I’ve ever seen. I’m tired of people invalidating what I know is wrong with my iPhone. There’s people on this thread and reddit and many other places that are experiencing these struggles with their battery’s health, so I have no idea how you could just be brushing this off as ‘normal’. But thanks for your input, have a good day.

Jun 9, 2021 11:15 PM in response to Macbrush

Beyond 80% just beyond 12m…. A staff of apple store told me that he never saw one case with battery replacement <80% in 12M. Even all bad health batteries would never achieve <80 “% beyond 1Y. Apple has calculated before setting this policy .


btw, all bad health batteries all suffer from 1% health drop in 1W. Mine is exactly 1%per week or 3 charge cycles since start of degrading . Now 92% with 79 charge cycles only . Don’t tell me this is normal anymore , 3 cycles with 1% drop !!!

Jun 15, 2021 7:59 PM in response to FCJRK

Thank you. I traded in my old model so I couldn’t do that so it would be greatly appreciated!


in addition I came across this video on YouTube. XS vs 11 pro vs 12pro all brand new devices with 100% battery capacity. The 11 pro out performed the 12 pro by an hour and 10 minutes. If I’m understanding this all correctly, shorter battery life = more charge cycles = faster degrading of battery health?



[Link Edited by Moderator]


Jun 20, 2021 1:58 PM in response to Dogcow-Moof

Okay, I get that. But at the same time, as apple customers it’s frustrating to have to get a new battery in our not even year old phone when we’ve paid over $1,000 for the phone. Plus what about the time it takes to drop to 80% battery health, are we just supposed to carry around a charger all day for a new iPhone that isn’t even a year old? The point of this discussion/thread isn’t to just go WOO we get new batteries when our phones drop to 80% battery health. This is about the frustration & annoyance & concern about why our not even year old iPhones are draining battery health so incredibly fast when they’ve barely been through many charging cycles, are barely being used & are being charged correctly. Previous iPhones have not done this, as other people have mentioned within the discussion/thread & yes I know they all have different batteries & it’s a different iPhone, but why is this one so different? So I get that you are like well ‘that’s good you’ll get a replacement in no time’ but the purpose of this thread isn’t to receive a replacement battery, it’s to discuss why it’s happening, what apple may do about it & see if others are struggling as well etc.

Jun 22, 2021 6:46 PM in response to Deepsea_D_Blue

Deepsea_D_Blue wrote:

I’m using 3rd party cos fed up with Apple expensive cables keep breaking after few months


I've never seen an Apple cable fail that wasn't abused in some way (people pull on the cable rather than on the connector body) or that wasn't subject to extreme UV exposure (a cable left in a car in bright sunlight every day.)


I've got nine year-old USB to Lightning cables that work perfectly every day.

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iphone 12 pro max battery health degrading

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