iphone 12 pro max battery health degrading

There is nothing to fix; this behavior is normal.

You cannot fix correct operation.

Yet again, a drop of 1% or so per month is expected.

If your health drops to or below 80% within your warranty period, Apple will replace the battery for free.

It's not that the scale has changed but rather in the past Battery Health would change in chunks.

I liken it to now having a gas gauge that accurately reflects current fuel levels rather than staying at full until it jumps to 3/4 full; the newer gauge doesn't mean your car is using more fuel just because your old one showed the tank was full longer.

Here are Apple's official statement on batteries:

iPhone Battery and Performance - Apple Support

and on charge cycles:

Batteries - Why Lithium-ion? - Apple

They estimate it will take 500 charge cycles for a battery to reach the 80% battery health level.

Math makes that .04% per cycle, and most people end up using a charge cycle about once per day or couple of days.

If you use a charge cycle per weekday, that's .8% per month, and since people also use their phones on weekends, a target figure of around 1% per month is a good average.

On a supportive note, I too was losing battery capacity starting in February - until then it stayed at 100% and then it started to accelerate and recently it would drop 1 % for every 3 charge cycles. I followed the rules and took it to Apple for advice when it had dropped to 85%. After they looked at the analytics and diagnostics on it, They replaced my phone.

If it goes to 80% within the warranty period Apple will replace the battery free. After that it will cost $69. But your battery may be defective in other ways. Use the Get Support link at the top of this page and Apple can test the battery remotely, or make a Genius Bar appointment to have it checked out.

Hi everyone. I contacted apple support today because my battery on my phone was depleting unusually fast. They activated screen sharing and also ran a diagnostic. Although the battery was at 89% capacity and passed the diagnostic test the representative was still able to see that my device was losing battery at an accelerated rate because during our 10 minute phone call my device dropped from 31% down to 19% in which she decided that a visit to the Genius Bar would be appropriate. Therefor simply having a battery that it is in the capacity range of optimal performance is not enough to dismiss a claim that your battery is indeed not performing to expectations. I would advise anyone who has concerns about their devices battery performance to contact apple support using the app and requesting a call back. There maybe other issues other than battery capacity that effect the battery life of the device.

You've ignored the many messages here stating you cannot compare "battery health" between devices as battery state reporting is much more accurate now.

It is completely normal, and again, if it falls below 80% within one year, Apple will replace your battery under warranty for free.

Again, until the health hit 80%, the battery is considered functional.

There's no reliable trend that can be drawn here.

I've seen the display drop a few points, and then stay the same for many months and as long as a year.

Had an iPhone 6s with the battery problem, and that dropped out hard—taking a photo went from charged and working to dead. Battery got replaced by the Apple recall. The replacement battery and the battery-related changes in subsequent iOS updates, and that iPhone 6s is still working, still on that replacement battery, and the health there is still above 80%.

Others reporting here have seen a precipitous drop in the battery over a short time, whether that was due to a battery problem, or due to exposure to an environment out of the specifications for the battery, or whatever.

When (if) the battery drops below 80% and particularly when the battery requires an additional change during its previous normal usage, then make an appointment to replace the battery.

LuigiBruno wrote:

"I always close any unused app

That might be a contributing factor; closing apps unnecessarily can actually increase battery usage. None of those apps are “running” - they are all suspended and ready to run. But if you are in the habit of closing them all the time then they can’t just restart from where the left off when suspended, they must be reloaded from storage, which uses more energy than just restarting them, and also slows down your phone. See→Do not close iPhone and iPad 'background'… - Apple Community

crystal_star wrote:

but optimized charging works directly on a routine, so if the phone charges at a different time, it'll think the schedule is messed up and it'll charge at a different rate to finish at the "normal" time. it'll still hold it at 80% for most of the night, but before and after that will be different, and that's what i'm worried about.

It tries to determine a routine, and if it doesn't really see one (like in my case) it won't even try. This is one thing that might theoretically help with battery longevity but is frankly of limited use. The best way to extend battery longevity would be to restrict the charge range into the middle and use the electronics to stop charging at a lower charge level or stop drawing power at a higher charge level. But you can imagine that advertising 2/3 the battery life isn't going to go well with most potential customers.

Using a smaller portion of the charge range is pretty common in modern electronics - especially in larger devices where maybe a little bit of the charge range can be sacrificed for longevity by using a larger battery. iPads and Macs have a 1000 cycle rating as opposed to iPhones with a 500 cycle rating. But this is easy to do as long as the user doesn't have to work too hard at it, like the 20-80% or 40-80% rule done manually.

However, I usually leave the house with a Mophie Powerstation 8000 in my pocket with a 4-inch MFi Lightning cable. I don't worry so much because I can just use that if it's not fully charged or it's run down. And I can use it to keep it charged and reduce the cycles that the battery encounters. This or a battery case is what would work best if one is super concerned about battery life.

iPhone12promaxbattery wrote:

I have used only 6 months my iPhone 12 Pro Max

and my Battery percentage is dropped by 94% already

What's the problem? Apple's ratings are for 80% battery health after 500 complete charge-discharge cycles. For normal users (25 cycles a month) down to 94% after 6 months is in line with expectations.

That’s as per my brother as well who is an apple tech. But i purchased my iphone 12 pro max june 2021, and it took me 8 months before my battery health went down by 1%. Literally 2 days ago. I was even a bit sad when I found out because my brother’s 11 pro max took 10 months for the batt health to go down by 1% and i just thought I wasn’t taking care of my phone properly. Turns out my brother told me that’s it’s good enough.

So what I do to take care of my phone is simple. Every week I drain my battery once. I charge my phone when battery becomes low, not as soon as it gets to 20% but I wait for it to become 10% to 15%. I don’t use my phone when I’m charging it. And I don’t sleep when it’s charging.

Now some other stuff I do are things that not other people can handle. Because I am a very simple person, my only widget is weather and clock (4 clock thing as my country is different from my parents and siblings). I don’t use face Id as I find is ridiculous (sorry). I only have 1 game lmao. It’s only to ease my boredom during class or during breaks while I’m studying. I have turned off or deleted built in apps that I knew I didn’t need (eg: stocks) so my phone only consists of mostly medical apps and the limited social media that I use.

Lastly, my phone is mainly used just to contact my friends and family, check updates in my university forum, reach out my professors, location services, and mainly to read and watch on leisure time. Idk if it sounds boring but I think all these helped me a lot to prolong my battery life. My iphone 8+ back then took 5 months before it went down to 99% batt health.

Hope this helped.

I purchased my iphone 12 pro max june 2021, and it took me 8 months before my battery health went down by 1%. Literally 2 days ago. I was even a bit sad when I found out because my brother’s 11 pro max took 10 months for the batt health to go down by 1% and i just thought I wasn’t taking care of my phone properly. Turns out my brother told me that’s it’s good enough.

So what I do to take care of my phone is simple. Every week I drain my battery once. I charge my phone when battery becomes low, not as soon as it gets to 20% but I wait for it to become 10% to 15%. I don’t use my phone when I’m charging it. And I don’t sleep when it’s charging.

Now some other stuff I do are things that not other people can handle. Because I am a very simple person, my only widget is weather and clock (4 clock thing as my country is different from my parents and siblings). I don’t use face Id as I find is ridiculous (sorry). I only have 1 game lmao. It’s only to ease my boredom during class or during breaks while I’m studying. I have turned off or deleted built in apps that I knew I didn’t need (eg: stocks) so my phone only consists of mostly medical apps and the limited social media that I use.

Lastly, my phone is mainly used just to contact my friends and family, check updates in my university forum, reach out my professors, location services, and mainly to read and watch on leisure time. Idk if it sounds boring but I think all these helped me a lot to prolong my battery life. My iphone 8+ back then took 5 months before it went down to 99% batt health.

Hope this helped.

I’ve had my 128gb max since launch day as well and i still have 100% now. I never let the battery go down below 30% and mostly charge at 50% until 80%.

As I mentioned, my launch day 12 Pro Max is at 97% too.

Why would Apple replace something for what is normal behavior?

iPhone Battery and Performance - Apple Support

My launch day 12 Pro Max is down to 93% which is completely normal.

If I feel weird about it, if it drops below 80% within one year it falls within warranty guidelines.