iphone 12 pro max battery health degrading

Hi,I activated my iphone 12 pro max 15.12.2020. Yesterday my battery health dropped to 98! This is unacceptable for me because my iPhone xs max has been kept at 100% for more than half a year. Probably the battery in 12 pro max is of lower quality as soon as it loses calories so quickly. For such an expensive device like this, it is unacceptable!

Darylcar wrote:

it maybe affect on my battery to charge at night and remove it in the morning? It bothers me a lot last night of what should i do 😓.

It is BETTER for the battery to charge it overnight and remove it in the morning, especially if you enable Optimized Charging. That way all power use during the night comes from the mains rather than the battery, which reduces the need to recharge the battery as often.

your battery health drop is very similar to my IP 12PM... is at 95% after 5.5mths use. Is dropping 1% every 1-2 wks now. Base on this rate it will be around 82% after a year which is what the Geniuses declare as normal

Mine has dropped another 1% to 93% since I joined this thread, it's like 2 points in 1.5 months. I am not too worry about it, but am trying to see why mine seems to be the worst one here. There are 2 things I could think of, I use GPS a lot and I almost exclusively charge wirelessly.

Apple says after 1yr it should be 80% or above if not they suppose to replace. But on my calculation of 1% every 2 weeks mine should be around 82% after a year.

my daily average screen time is 6hrs+ ..... is that considered very high usage? Mostly is using YouTube & WhatsApp

At this stage I actually hope the battery dips below 80% by Nov. My daily average is 4hr. 49min.

This is mostly email, Safari, text. Surfing Instagram at times. That's really it. I would not consider this "heavy usage."

I did upgrade to iOS 14.5, battery health remains the same. *The battery health for 11, 11 Pro/ProMax models was supposed to be fixed - recalibrated after the 14.5 update, was hoping for perhaps a little fix for the 12's also, guess not.

Mine is 4.5-5h on screen. I tried to have my phone uncharged overnight with WiFi on. The battery dropped from 100% to 94% without any app running . No background app refresh . CPU at 5%. Apple was asked , obviously normal as claimed

I was told by two apple staff members that apple battery rarely went below 80 in one year even if it was defective , usually a bit more Than 1y. BTW, the drop is not in linear way, so it may not be easy to get free battery in this year

I got 12 Pro in Nov and my battery health is 92%!! I’ve owned iPhones since 2007 and keep them for a least 2-3 years or more before upgrading and the battery health never goes below 96-94%. Now less than a year it’s down so much!!

Since I got the iPhone 12 Pro Max this year 5 February 2021, it went from 100% to 97% till today. 2 Months and 24 days.... And apple would not replace it under warranty if its not 80% which I am not happy about and as I said on my previous comment the battery health degeneration for this model is not good.

It is normal behavior.

You're comparing it to past phones running past versions of iOS, where battery health wasn't calculated correctly.

About recalibration of battery health reporting in iOS 14.5 - Apple Support

You mean a past iPhone 11 Pro Max that I had a year ago. Yes and I expect a certain quality especially when I paid a premium for this phone. So no this is NOT normal behavior, as I NEVER have this issue before. As well it does not take various updates to get the iOS to read the battery health "correctly" especially when it comes from a billion dollar company.

iphone 11 may have problem after iOS 14 but the battery life of iPhone 12 really varies . Some are very good but some are bad . 2 staff of apple told me that even “bad” batteries rarely ended up with 80% within one year, though the efficacy would be lower than other” better “ one. Apple has already calculated this 80% in such a way that most clients have no chance in getting exchange free. Most will end after 1+y , then u will need to pay

Deepsea_D_Blue wrote:

My 12PM Drop to 94% after 5.5mths of use averaging 6hrs+ daily use….Maintaining that 1% drop every 1-2wks

Your math is way off. If it drops 6% in 5.5 months that is a 1% drop per month, not 1% every 1-2 weeks. (There are 4 1/3 weeks in an average month, not 1 or 2)

And the number of hours you use it is irrelevant, because that could be light usage like reading emails, texting and web browsing, or heavy usage like watching videos or interactive gaming. What matters is how much energy is used in those 6 hours, and how you charge it and for how long. See my other post above this one.

elittle wrote: "I'm experiencing the exact same thing. 5% drop in about 6 weeks. In March, my battery health was at 100% and now I'm at 95%."

What model iPhone is it? ...If it's an iPhone 11, iPhone 11 Pro, or iPhone 11 Pro Max, this may be relevant:

About recalibration of battery health reporting in iOS 14.5

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