iphone 12 pro max battery health degrading

Samuel Maffei wrote:

Me too. Bought my iPhone 12 Pro at launch and it's already down to 89% capacity. That seems like a lot of drop considering the phone is not even 9 months old yet. I expect around 10% drop around the 1 year mark. At this rate, I'll be below 85% by the one year anniversary.

Around 1% per month is normal, yours is a little low but not low enough to be out of the ordinary.

• iPhone Battery and Performance - Apple Support
• Batteries - Why Lithium-ion? - Apple

I struggled with the same problem since late march, dropped from 100 to 93 in 3months, the worst case was 1% drop in 1 week.

I saw drop on every saturday . I asked for remote check x 3times and went to apple genius bar for 3 times. All remote or on site diagnostic tool all yielded NORMAL except the last time. I met the manager in second time, I told him about the drop oh health in each week. He said that it was odd with 1% drop with 2-3 charge cycles and he suggested me to keep observe and tracking of health. He would find ways to solve this if I could show him evidence of continous drop in weeks. I went there for third time with further drop of 2% in 2 weeks, I showed him the screen shot of official native battery health page with date and coconut data for reference. They checked again and finally showed a yellow icon with something odd, I forgot the exact meaning, ?? something related to charge cycle or so. The manager finally replaced a new battery for me without paying. He also asked me to replace the motherboard at the same time in case of short circuit with battery leakage, but I didnt want to set up another new device again, so I replaced the battery at the moment.

the first shot is data of old battery, then second is data of new battery

Try to go and ask manager to take a look. Regular staff has no authority to replace battery >80% health without paying unless there is also motherboard problem.

Old battery default capacity was 2798, lower than spec claimed capacity of 2815 (correct me if I am wrong)

the new capacity is 2916 now, so far under monitoring

zemar176 wrote:

I got my iPhone 12 Pro in jan or feb and now the battery percentage is 90% does anyone know how to increase the battery health

You cannot increase battery health. It starts to decline the moment the battery comes off the assembly line and will continue to do so until it is no longer fit for use. It's physics.

That’s your opinion . I saw scientific papers on wireless charging and fast charging before . Staff in Genius Bar Also commented that fast charging may not be good . I confirmed with type C fast charging also made my old battery degraded faster .

i know that u are always against me but

That are what I read , heard and found myself .

It can be a problem when you update to a newer iOS which means you got Tip when you go to battery and it says something you did wrong when you were updating your iPhone. But if you don’t see it well replace your battery and try because I never had this problem, my iPhone only dropped to 99% because I did something wrong when i was updating.

iPhoneUser147 wrote:

my iPhone only dropped to 99% because I did something wrong when i was updating.

Your phone's battery health will continue to drop no matter what you do. There is nothing you can do to prevent it.

Suddenly My battery health became very good..still stuck at 89% after a month’s use eventhough I m using it more often… it was dropping 1% every 1-2 weeks previously.

looks like Apple trying to avoid changing my battery

Msherif wrote:

How about battery recalibration. I watched videos on YouTube that it may restore around 2% in your battery health?

Will this work?But,

Re-calibrating does not change your battery health. It only changes what your phone thinks the percentage is. It's as if your car had a full tank of gas but your gas gauge was stuck at 1/4. You get the gauge fixed and it correctly shows 1/2. But, the actual amount of gas is still the same.

There is absolutely no reason to be checking or worrying about your battery health unless 1) your phone is not working correctly or 2) you're close to the end of your warranty.

How about dropping 8% on battery health in just 4 months of use…I find it absurd & alarming but after apple checked? They said my battery is perfect…..obviously they are using the wrong diagnostic tool!!!!

So in summary, you're upset that it isn't dropping as fast because it may not show that you need a new battery despite the fact that in reality Battery Health is largely meaningless unless/until it drops below 80%.

That’s about right. An iPhone with average use will lose about 1% of capacity per month. 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 improve the life of your battery 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.

This is definitely a long term issue as well. In recent times, I have been thinking my battery life has not been as long as when I first used my 512 gb iPhone 12 Pro Max. I checked my battery health today to find it was at 89%?? I found this thread soon after and the rate IS CONSISTENT. I’m not sure what the issue could be, I have had optimized charging enabled the whole time, and it’s only been charged with a USB-C cable and an Anker PowerPort III 36W charger. I’ve only used the public releases of iOS, and usually update within a week of a new release (still running iOS14.6). I’m not sure if this has anything to do with it, but my iPhone has lived its entire life in a Mous Limitless 3.0 case.

I’m really hoping this issue can be fixed with software, but I may have to use the limited hardware warranty to replace the battery when it’s around 84% battery health in November😞

Before updating to ios 14.7.1, my iphone 12 pro max after using it for 6 months is still 100% battery health. Immediately after the update, it dropped to 95% (in just 1 day). And now, continue to reduce it to 94%. The most confusing thing is that my phone uses very little, I only charge it once every 2 days, always turn on optimized battery charging, when the phone gets hot, I stop using it immediately and cool it down with a fan. With the same usage, my old iphone 11 pro max after 6 months of use is 99%. What the **** is going on???

my 12 pro down to 91% and I got it December 14th. It’s battery health is declining so fast. It took my iPhone X at least two years to get to 90% so this is really upsetting to me as I bought this phone for it’s battery life.

Normal battery wear is what's going on.

You can't directly compare what some old phone reported for Battery Health with your new device.

Again, don't worry about it unless it falls to or below 80% in less than a year; if it does, Apple will replace the battery for free.