iphone 12 pro max battery health degrading

Mine was concluded as ABNORMAL by APPLE genius bar and the shop manager , thus I was replaced with a new battery without paying .

Though I was given with a New battery by apple , somebody said that apple was wrong , they were not engineers .

if u feel unhappy with the rapid , find them to check. Drop in health means drop in capacity ,this may affect the duration of usage .

I needed to go there for three times to document the data on dropping in terms of weeks or days before they could confirm that my battery was abnormal. Remember to keep track eg coconut data and screen shot of health

Jdies wrote:

I bought an iPhone 12 256GB last December 2020. It was doing quite good in the first 4-5 mos. until I checked the battery health that went down to 99% after a few months of maintaining it on 100%. I usually use this for conference calls, Zoom meetings, videos and social media. After declining from 100%, it progressively decreased to 93% in just a month or 2. I’m using its original USB C to lightning attached to an Aukey 20W adapter. It charges quite fast but I notice the adapter get heated quickly as well. I don’t know if that has something to do with the battery’s health.

As I’m certain you didn’t read ANY of the thread you just posted to, I will repeat a post I made yesterday on the previous page in the thread, adjusted for your situation:

No, if it’s at 93% after 9 months that’s better than average. In normal use the average iPhone will lose about 1% a month in capacity, so it really should be down to 91%.

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” ( some will be a little more, others a little less). 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.

The absolute best way to slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often. The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates.

Any battery health 80% and higher is normal, per Apple.

When the battery health drops below 80%, make an appointment to get the battery replaced.

Battery health will decrease, but how quickly depends on usage and environmental and other factors.

All batteries inevitably and inexorably degrade, the only difference from the common cases is that there's an approximation for the health on an iPhone.

For what Apple suggests doing to preserve the useful life of the battery:

... iPhone Battery and Performance - Apple Support

... Batteries - Maximizing Performance - Apple

jeongg wrote:

Is it normal? 🥺🥺🥺

I’m quite anxious since a friend of mine who bought the same phone a month later than me is still at 100%

We can provide y’all with tips for winning this impromptu race downward to battery replacement territory, if you’d like. 🤪

Reverse those same tips to slow the inexorable battery degradation, of course: Batteries - Maximizing Performance - Apple

But seriously, yes, it’s a battery. Yes, it will decline. Yes, it will fail. When the battery fails, you can get the battery replaced.

Different batteries have different characteristics, slightly different construction details, different usage patterns, different charging patterns, and different environmental exposures, any and all of which in aggregate will effect the battery health to differing degrees.

Some folks see a drop, then the same health for many months. Others can expose the battery to excess heat or other detrimental activities, and the health drops much more rapidly, All will trend downward, eventually requiring an extra charge during normal use, or otherwise manifesting capacity problems.

As for causes for anxiety, you know what will happen. The battery will fail. And you have a solution. Replace it. You have a plan. A plan of how to treat the battery to slow its decline, too. In the meantime, use the iPhone for what you purchased it for. Which was probably as an iPhone, and not as an expensive battery health monitor.

Background: iPhone Battery and Performance - Apple Support

uzair199 wrote:

I am at 88% after 10 months of 12 pro.

As IdrisSeabright indicates, your battery health is considered fine. 🟢

If you want preserve the battery longevity, see the tips published by Apple: Batteries - Maximizing Performance - Apple

If you want to understand a little more about battery tech: iPhone Battery and Performance - Apple Support

And when your battery drops below 80% and particularly when your iPhone needs an additional charge during your normal use, the battery can then be replaced.

crystal_star wrote:

Yeah but is slow charging going to damage my battery? Isn't it better than fast charging?

Shouldn’t.

Charge the iPhone while you sleep, and when your usage exceeds the available power reserves.

Batteries are consumable parts.

Batteries will wear out, inevitably, inexorably, always.

You bought that iPhone to play games with it, so play games with it.

When the battery health drops below 80%, replace the battery. Apple charges USD$69 for an out-of-warranty battery replacement. Or replace the whole iPhone when the battery is failing, if the battery has lasted long enough to make that upgrade preferable to you.

If you want preserve the battery longevity, see the tips published by Apple: Batteries - Maximizing Performance - Apple

If you want to understand a little more about battery tech: iPhone Battery and Performance - Apple Support

crystal_star wrote:

so plugging it in later than the day before isn't necessarily causing the problem?

No. There is no problem. The only problem is that you're worrying about something that isn't a problem.

There are only two times you need to look at Battery Health: 1) If you are having an actual issue with your phone running unusually slowly or perhaps suddenly shutting off or 2) About a month before the end of your warranty. Check to see if it's close to or below 80%. If it is, make arrangements to have the battery changed. Otherwise, pretend that setting isn't there.

amalia185 wrote:

Yeah why does the battery health drop so quick . 🥲

Real battery capacity doesn't actually drop something like 4% overnight or in a week/month. The battery health number updates at seemingly random times. It's an estimate of remaining battery capacity based on constantly monitoring the battery parameters, including temperature, current, and voltage. But if you're at 90% after almost a year of regular use on battery power, that's typical.

I totally understand that it feels like the battery health number staying at the same point for months seems like a good thing, but it may not reflect how the battery is actually degrading as it's just a matter of when it updates.

Battery health does not decline in a linear fashion. You've got nothing to worry about.

Check the health if your phone's charge doesn't seem to last as long as it used to, and plan to replace the battery once the health is below 80%

~Lyssa

GGGGCLK wrote:

Just 59 cycles with 4% , all 4% started within 1m , is it odd ??

No, it will drop about 1% for every 25 cycles, so it is slightly below the expected 97.6% for 59 cycles, but the measure is not that precise. You shouldn’t be obsessive about it until gets close to 80%

Deepsea_D_Blue wrote:

Currently my 12PM is at 94% after 6mths… based on current 2% drop per mth it will be 82% after 1yr….so Apple is safe

Let’s review your math. 100%-94%=6%. 6 months. That’s 1% per month, not 2% per month. 1% per month is about right. And what are you doing to manage your battery life? The phone is designed to be charged overnight with Optimized Battery Charging enabled. If you are not doing this you will lose capacity faster than if you do it.

I’ll tell you a little secret about your old phone, using an XS Max as an example. (Well, not a secret, but an observation from another forum regular, SergZak). All iPhones have a specification for the battery. For the XS Max that is 3174 milliampere-hours (MaH). So the battery monitor is calibrated for 100% at that value. But there are variations in manufacturing, so some batteries will have less capacity, and some will have more. Suppose your battery had, say, 3374 MaH capacity. That would still show as 100%, but as it aged the health would stay at 100% until it fell below 3174 MaH. This would appear to you as if your battery had fabulous life. The only way to determine this is with a 3rd party app, and then only if you check the battery capacity when the phone is new.

Plus, 5G is a real energy hog.

That has always happened with some iPhones, and the reason, per SergZ, is that there is variability in manufacturing, and some batteries start with a capacity that is greater than spec for the battery. For example, a 3300 MaH battery starts as 3600 MaH. But the gauge does not go above 100%, so it appears that the capacity doesn’t begin dropping for several months, when the capacity finally drops below 3300 MaH. At the same time, no matter what model phone you have you will find posts complaining about loss of capacity in the first few months. Not just iPhone 12’s, also 11’s, X series, SE’s, 8’s, etc.

Just as some batteries start above their rated spec, some start below. That’s why some phones show 99% right out of the box.

None of this matters until the capacity gets close to 80%, which for most users will be 18 to 24 months out.

But you also need to keep in mind that a few phones actually do have defective batteries; that makes separating the actual bad batteries from the normal aging batteries difficult in a thread this long.

I went to apple for repairing my MacBook last night and happened to talk to the senior manager and manager about this odd battery of my iPhone 12 Pro . I showed him my log on. Battery health . They said that once it started to drop , it would never slow down , if 1-2% per week , it would drop in this rate . He admitted that it seemed to defective battery but he needed to get more evidence and asked me to keep observe for several weeks, if ut still dropped by several % in these weeks, I could find him and discuss about the battery replacement solution ( treat as defective battery )

Batteries are a consumable, whether it's an Apple, Google or Samsung phone or one from any other vendor. You can pay $1000, $1000 or a $1 million for a phone batteries work the same way. (For that matter the same is true for electric cars as well; from the day you drive an EV or Hybrid off the lot, the ultimate battery charge capacity begins to fall.)

If you prefer Apple could get rid of the battery health meter and you could notice your phone shutting off by itself at some future point or could just report "Replace Battery Now" when it fell below a particular threshold.

It's not that the battery health is falling faster, it's that the representation on the 12 is more accurate than past assessments due to enhanced monitoring capabilities.

So you can complain, but it will happen regardless of vendor; some just won't let you know anything is going on.

This isn't unlike the complaints some have about certain vehicles which have accurate gas gauges that show them dropping below Full after driving just a few miles; other companies choose to implement them such that they read F until near 7/8 tank and they drop from F to 7/8 in one jump.

iPhone Battery and Performance - Apple Support