iphone 12 pro max battery health degrading

Screen on for seven hours twenty, and off for 21 minutes, per that display.

Just below what was posted there, there’s a section on app usage. Are the active apps there as expected, or has some app gotten busy?

It’s expected that the first day or two after an update will have some background power usage. Usual recommendation after that, for post-update weirdness, is to force a restart with the buttons, and if the problem persists to then contact Apple.

Clearly apple thinks there’s absolutely nothing wrong with it, considering they said it’s in “good condition”. Clearly they don’t find anything wrong with my phone, and I’ve been complaining of poor battery performance since months, go a few pages back. So they’re acknowledging 80% battery health in 345 cycles is normal.

Your battery is designed to hold 80% health at 500 cycles under normal conditions. My phone hit 80 percent and remained there for a very long time. 80 percent health is an estimate of your health based on use, environment, etc. But yes, it still supports peak operation and there is nothing wrong with the battery at this time. Again, if it falls to 79 percent, then have it replaced.

What are you talking about? I have charged every iPhone I have ever owned over the past 14 years overnight, every night. My current Xr shows 94% maximum capacity, and it’s almost 3 years old. I typically keep phones for 3 years, and I have never had to replace a battery. Are you sure you know how to use a phone?

ToastyGhost11 wrote:

How long do you think it’s supposed to last? Charge it every night and don’t expect it to last six months! You ppl obviously don’t know how to use a phone!

I've had iPhones since the iPhone 4. I've sold them, I've been required as part of my job to teach people how to use them. And, I plug my iPhone in every night to charge. My batteries generally last around two years.

My iPhone 12 Pro pass the diagnostic testing all the time however being on Apple care support like on the phone for 1 hour 5 minutes, my battery drop from 32% to 9%. Mins you, I turn off background update, turn on optimize battery, deem the brightness. That is not covered by Apple Care.

Also, the following weeks, They run it 4 times, 4 times passing yet without using the phone for 3 hours or more, the battery drop from 100% to 78%. Yet again it’s not covered by Apple Care because it’s passing.

its very frustrated, I even back up to my laptop and restore it as a new device and transfer everything except data and file still drop significantly. Yet it’s not covered by Apple Care.

[Edited by Moderator]

What do you mean by “NOTHING” in the background? Are you killing apps intentionally? Do you realize that only removes them from the list of recently used apps, it does not prevent them from restarting to process notifications, content updates and downloads? And that killing apps actually increases the load on the battery when those apps reload rather than just resume? As most of your energy is being used by 4 social media apps, which update constantly, I see nothing unusual in your usage.

I literally did nothing different than I ever did, I closed them all before I left and cleared their cache and everything. So why did it drain so much yesterday? If there was background usage, it would've showed up in the 7-8 usage.

My guess is that this has to do with optimized battery charging because it works around a schedule, which is kind of impossible to maintain. About a year ago, even when this phone was brand new, it drained from 80% to 50% in only 20 minutes of not using it, and my guess is that the day before at that specific time, it was at 50% already, so the battery wanted to maintain the same charge the next day so that I could plug it in at the same time. I remember being super suspicious about that. Therefore, I made it a point to charge it every day at exactly 9:30, but that means my battery has to be at a certain percent by a certain time for that to work, and that's not what I want at all. If this is indeed what optimized charging requires, then the phone is just not worth $800. I doubt that anyone in the world experiences charging their phone at a new time every day and having it drain drastically in a short period of time. My classmates charge their phones during class and probably do at home too, and their battery is normal. I understand what optimized charging is trying to do, but isn't that ruining the usage?

crystal_star wrote:

Therefore, I made it a point to charge it every day at exactly 9:30, but that means my battery has to be at a certain percent by a certain time for that to work, and that's not what I want at all.

Why are you doing that? It makes no sense. Put the phone on to charge when you go to bed at night and take it off in the morning. Your battery doesn't need to be "at a certain percent" before you put it on to charge. You're overthinking this.

So you're basically saying that optimized battery charging doesn't force your phone to be at a certain percent for it to charge at the "right" time? Doesn't it learn my routine? Why else would my battery drain drastically for no reason?

I’ve explained the battery drain question twice now. I see no need to repeat what I posted if you aren’t going to read it.

Optimized charging is only useful if you charge overnight. And I also explained how it works. Again, read what I posted.

thank you for that, now i know that i can charge anytime i want, because all this time, i thought optimized charging was based on a routine. so i'm assuming that the extreme battery drain is just caused by a bug in ios 15.2? i also noticed that my watch has been draining a lot too, from 100% at 7 right when i unplugged it to 45% only 5 hours later. before i got the update for the watch, it always lasted until at least 8 pm. as for the phone, like i said, that problem didn't show up until yesterday evening.

crystal_star wrote:

thank you for that, now i know that i can charge anytime i want, because all this time, i thought optimized charging was based on a routine. so i'm assuming that the extreme battery drain is just caused by a bug in ios 15.2? i also noticed that my watch has been draining a lot too, from 100% at 7 right when i unplugged it to 45% only 5 hours later. before i got the update for the watch, it always lasted until at least 8 pm. as for the phone, like i said, that problem didn't show up until yesterday evening.

Not, it is not a bug in 15.2. If it was a bug in a version I would have the problem also, and I don’t. Basic physics: The battery drains because “something” is using energy. And the only things that use energy are apps. So if the battery is using more energy than you think it should you need to find the app or apps that are using that energy. From your screen shot that is obviously tiktok, followed by Youtube. If you have a weak or no cellular signal the phone will use a lot of energy just to stay connected to the network, but that doesn’t appear to be your cause because you are showing a strong signal (unless it is weaker in other locations). But if the cellular radio is using a lot of energy it will display that fact on the battery status screen.

annamaria9888 wrote:

My battery life is in 88% and I use the phone almost a year. Do I have to go to change it? Do you have any recommendations? Thanks a lot.

The battery is working normally if it does not display a message saying the battery is degraded and the maximum capacity is above 80%. 88% after a year is in the normal range.

Batteries are consumables; they lose a little capacity every time they are discharged, then recharged. On average this works out to about a 1% loss for every 25 “full charge cycles”. As one example, if you charge the phone overnight, every night (and that is what you should do; it is a best practice), it starts the day at 100%. If it drops to 20% by the end of the day before you charge it again overnight that counts as 0.8 full charge cycles (20% to 100%), or about 24 full charge cycles per month of use. For this example your battery capacity will lose about 1% per month. Of course, if the end-of-day level is higher than 20% the capacity loss will be a little less, and if it is lower than 20%, or you charge it during the day, the capacity loss will be higher.

You will find that everyone with any model iPhone over the past 14 years since the first iPhone was released will sometimes report battery drain issues, and most will blame it on whatever iOS version is on their phone at the moment. And if you visit Android forums you will see the same responses. You have the data from one day. That is not enough information to conclude anything about your phone. How many emails did you receive in the time period? How many texts? How many tiktok posts? How many notifications appeared on your notification screen? Any WhatsApp messages? Signal? Messenger? Duo? Facebook updates? Phone calls? News story updates?