iphone 12 pro max battery health degrading

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.

yeah i don't think it can see a routine for me either, but if it tries to determine one, it's going to have to use other details, like the unplugging time, right? since for the last week, i've been unplugging at around 10 PM to go somewhere until 1 AM, it tried to charge faster on a day that i didn't need to unplug that early afterwards? this is so inconvenient.

crystal_star wrote:

yeah i don't think it can see a routine for me either, but if it tries to determine one, it's going to have to use other details, like the unplugging time, right? since for the last week, i've been unplugging at around 10 PM to go somewhere until 1 AM, it tried to charge faster on a day that i didn't need to unplug that early afterwards? this is so inconvenient.

If you keep an inconsistent schedule when it's charging at night or unplugging in the morning, the programming is never going to figure out a right time to stop charging at 80% or a right time to start charging in the morning. Might as well just turn it off and let whatever happens happen. But again, it's of limited benefit if it's going to be charged to 100% every day anyways.

Some have advocated for more user programmability of the battery settings than just "Optimized Charging". I have a non-Apple laptop computer that can be programmed for maximum longevity by pretty much halving the charge range. Electric cars can be programmed to limit their maximum charge, and I heard of one battery researcher who believes that a Tesla battery might last 20 years given that one user he's been consulting set the max charge level to 80%. However, Apple has never chosen to implement such features in its battery management.

so if i charge it at 8:30 every day for one week, and then the next day, i charge it at 9:45, there's really no way to tell if it'll charge faster to finish faster? because if that were the case, it thinks 8:30 is the routine so it'll try to make changes to the charging pattern. and by doing so, my capacity will drop. this happened twice already out of the numerous times i charged at different times every day. if there really is no equation for this, then i guess i have to try to charge at different times every day so that it doesn't mess anything up.

crystal_star wrote:

so if i charge it at 8:30 every day for one week, and then the next day, i charge it at 9:45, there's really no way to tell if it'll charge faster to finish faster? because if that were the case, it thinks 8:30 is the routine so it'll try to make changes to the charging pattern. and by doing so, my capacity will drop. this happened twice already out of the numerous times i charged at different times every day. if there really is no equation for this, then i guess i have to try to charge at different times every day so that it doesn't mess anything up.

You'd have to ask whoever developed the system. I'm not even sure exactly what it does other than rely on a specific routine - possibly using the same charging equipment. I'm not even sure if would know what it's plugged into, such as maybe a 2.5W port on a typical USB outlet on a laptop. That could have an effect on finishing the charge in the morning with Optimized Charging, especially if the user might use something different on different days.

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?

Apple considers the battery fit for use until it drops below 80%. If drops that far before your warranty expires, Apple will replace it.

On average, battery health declines between 1 and 2 percent a month. So, your phone appears to be behaving normally.

Marinoalya wrote:

Some of you sound like you’re representing Apple

But, we're not. Just because you don't like the answers doesn't mean we are.

The person to whom you replied definitely doesn't sound as if they are representing Apple.

Marinoalya wrote:

you must be one of them because I wasn’t talking about you.

I have no idea what that means.

This is a user-to-user forum. Apple's participation is limited. I don't believe anyone from Apple has posted in this thread.

amalia185 wrote:

This ***** . Such an expensive phone for the battery to go down so quick . Same with me here iPhone 12 Pro Max down at 89 already .

Batteries are actually pretty cheap. A battery service is primarily paying for the personnel and equipment costs.

amalia185 wrote:

Batteries aren’t cheap in Belize for iPhones

I get that. But the a high quality battery is actually quite inexpensive. An Apple battery service isn't really paying for the battery, but the service, materials (like new seals), and the expensive equipment that Apple uses to make sure everything is correct.

If you really want to, you're free to choose outside repair that's cheaper than Apple. You'll probably get a warning that your battery isn't genuine and the battery health won't display. But many choose that and live with the results.

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.

Is there also a specific rate that the phone is supposed to charge? I know it’s not fixed and that it slows down as you get higher, but is there a real rule? Usually, I notice that it charges 2-2.5 minutes per percent, but today, it was a lot faster. Thankfully my capacity didn’t drop, but the last few times it charged faster than ~2 minutes per percent, it did. I just hope today’s little change doesn’t affect the future charging. it might because i just updated and the phone is doing some housekeeping, but in conclusion, is there a specific rate?

crystal_star wrote:

Is there also a specific rate that the phone is supposed to charge? I know it’s not fixed and that it slows down as you get higher, but is there a real rule? Usually, I notice that it charges 2-2.5 minutes per percent, but today, it was a lot faster. Thankfully my capacity didn’t drop, but the last few times it charged faster than ~2 minutes per percent, it did. I just hope today’s little change doesn’t affect the future charging. it might because i just updated and the phone is doing some housekeeping, but in conclusion, is there a specific rate?

Not really. There's probably a maximum rate that the charging system considers safe, and you're right that the charging rate tends to go down as it approaches getting full. It tends to create more heat as it approaches 100% and reducing the charging current is need to prevent damage to the battery, and even for safety reasons.

It theoretically should charge near the maximum rate when it's up to about 70-75% if the power adapter can supply enough current. But a less powerful adapter might be able to supply the requiredcurrent when it's near 100%.

By “maximum,” do you mean the maximum fastest rate?

So what I do is, I plug my phone in and turn it off. Exactly 7 minutes later, I turn it back on to see if it’s charged 3% higher than what it was when I plugged it in. It’s fine if it hasn’t reached 3%, but if it’s more than that, then that’s a problem because it’s trying to keep up with some schedule, right? Today this happened, but thankfully, my battery capacity didn’t drop. Previously, when it had charged from 60-64 in 7 minutes, my capacity went from 94% to 93%, which was very upsetting. Just two weeks ago, it went from 58% to 64% in 7 minutes! That averages to about 1.2 minutes per percent, which is really, really fast! And that caused my capacity to drop from 91% to 90%, which was even more upsetting.

All I want to know is; is it supposed to be that way?

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.