Level 1

47 points

iPhone 15 Pro Max Battery Health Dropped To 99% In Less Than A Month

My brother and I purchased the new iPhone 15 Pro Max when it released in September. At the beginning the iPhone was overheating even when charging. I also noticed that the battery would drain very quickly. I charge my phone up to 85-95% & only charge it to 100% when I know I will be out & about all day. But most of the time even if I do go out all day the max I charge the phone to is 95%.

I checked my battery health and it says 99% which is insane & NOT normal for a brand new iPhone that’s not even 2 months old. My brothers phone is at 100% on battery life and he is CONSTANTLY on his phone.

I’ve contacted apple and they have done their little test and shows that everything is fine but they don’t give an explanation as to WHY the iPhone has dropped to 99 in less than 2 months as well as to why the battery drains so quickly.

My iPhone is also updated to the latest IOS 17.1

I’ve had iPhone since the 4s & this is the first time I have experienced my iPhone battery health dropped to 99 in less than 2 months & the battery draining quicker than my old iPhone 13 Pro Max that had a battery life of 83% after having it for 2 years. I have always been careful with battery health & hardly charge to 100% and have gone 1-2 days until needing to charge my iPhone.

is anyone else having this issue? Apple hasn’t been very helpful and says my phone is fine even though the battery performance has been horrible even after the new update they claimed fixed the problem. I’m still having this problem & it’s coasting the health of my battery.

I shut off all background app refresh to see if it helps & so far it seems to be doing a little ok but the fact that the battery performance has been bad I’m very disappointed with apple.

iPhone 15 Pro Max

Posted on Nov 3, 2023 12:05 PM

Top-ranking reply

Lawrence Finch

Community+ 2025

Level 10

229,138 points

Posted on Dec 17, 2023 8:16 AM

Jeff_88 wrote:

I am having the same issue, I have contacted Apple support via messages and they mentioned there is an issue with my phone and asked me if I want a replacement phone to be sent and to charge me the shipping cost or to go to the Apple store. I said I go to the Apple store, and I went there the staff told me and the manager there was no problem with my phone i asked them why they gave me an option to come here, they replied because apple online has a different procedure. they wasted my time and very bad experience.

Your battery did not drop 1%. It probably dropped 0.1% from 100% to 99.9%, because the gauge in the phone just displays the whole number, not the fraction, so 99.9% appears as 99%. But any loss of capacity is NORMAL.

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.

Once the capacity drops below 80%, or if there is a message in Battery Health that the battery is not meeting peak performance expectations, it’s time to change the battery→iPhone Battery Replacement - Official Apple Support

The absolute best way to get maximum use on a charge, as well as 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. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support

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255 replies

Jan 27, 2024 12:19 PM in response to RahulRajaan

Did you see all of the information from other users in this post that state that it is normal for the Battery Health to decline about 1% a month?

So, after 6 months, you can expect your battery health to be at about 94-95%. After 12 months, the battery health will be at 88-90%.

Replace the battery in about 2 years when health is down to 80%.

Alancito

Level 7

29,994 points

Jan 29, 2024 2:45 AM in response to arifgng786

arifgng786 wrote: "My iPhone 15 was delivered on December 8, 2023..."

arifgng ~ But, before December 8, the battery and then your assembled iPhone were stored for some months in a supplier's warehouse – where the battery's health inevitably declined slightly.

Also, in measuring a dynamic, chemical process such as in a battery, the algorithm's 97% result will be only an approximation of the battery's actual health.

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errodd01

Level 1

9 points

Feb 6, 2024 7:05 PM in response to soitsjesse

I think it's random on the batteries from Apple. Some people get lucky on having great battery health and others don't. Example my wife's iphone 15 has only 32 charging cycles, I have it 80 % charging limit and it's already 98% battery health. My iphone 14 pro has 202 charging cycles and battery health is 97%. I use apple's original charging cable and 20w charging brick.

Alancito

Level 7

29,994 points

Feb 13, 2024 12:17 AM in response to NIBRAS3050

NIBRAS3050 wrote: "...it only used for one month"

NIBRAS ~ But, before you started using it, the battery and then your assembled iPhone were stored for some months in a supplier's warehouse – where the battery's health inevitably declined slightly.

Also, in measuring a dynamic, chemical process such as in a battery, the algorithm's 98% result is only an approximation of the battery's actual health.

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Dogcow-Moof

Level 8

36,827 points

Feb 15, 2024 2:54 AM in response to Community User

It is completely normal.

Apple expects your battery health to drop by 1% - 2% per month of use.

You are doing much, much better than usual; given the age of your phone a normal range would be 94% - 97%.

You cannot directly compare battery health drops between iPhone models, the statistics are completely different due to the different battery capacities and battery chemistry differences between models.

Feb 23, 2024 10:45 PM in response to soitsjesse

I Changing a new series of the iphone in every year, since iphone 13 pro max (always pro max series). And Iphone 15 pro max is the worst battery health I think. Because I compared the last 2 series of iphone, and the battery health reduced about 3-5% in a year. Worst than 15 pro max mine which reduced by 2% only in 2 months with cycle count is 66. I don't know if it's the company's strategy or not. Or a change in the system that is currently too honest.

I Also compared to my wife phone is Iphone 15 which still having 100% battery health even if the cycle count in about 122.

Feb 25, 2024 6:45 AM in response to IdrisSeabright

IdrisSeabright wrote:

lobsterghost1 wrote:

And the change you are referring to is Apple will soon be providing charge cycles in the Battery Health setting. This will show real time the charge cycles, which it never has before, so people won't have to install unreliable battery apps to see the cycles.

Oh, great. More information for people to obsess over about something they can't actually change.

Indeed. How much time have we all wasted trying to explain to users that battery health goes down, normally and can't be stopped since Apple made the UNFORTUNATE decision to show Battery Health? This may be one of the more unfortunate decisions they've ever made.

Feb 26, 2024 6:33 AM in response to lobsterghost1

lobsterghost1 wrote:

Indeed. How much time have we all wasted trying to explain to users that battery health goes down, normally and can't be stopped since Apple made the UNFORTUNATE decision to show Battery Health? This may be one of the more unfortunate decisions they've ever made.

Which they made because they weren't as transparent as they could have been about another problem....

Mar 1, 2024 6:34 AM in response to ryan678

ryan678 wrote:

"I got mine at launch and was on my second replacement when the battery had gone down to 99%. I contacted Apple Support about this, and all they said was, 'You must be using the iPhone too much.' I said, 'But it's a phone meant to be used daily.' They had no idea. Now, on my third replacement, I guarantee it'll be at 99% by May at the latest. An absolute joke in my opinion."

Did you read any of the posts in this thread, where it has been explained multiple times why Battery Health declines, which is normal, expected and can't be stopped? You CANNOT stop Battery Health Decline at all.

Mar 1, 2024 7:06 AM in response to Banghtut

Banghtut wrote:

I’m facing like this battery problem. I bought new

https://discussions.apple.com/content/attachment/001fb8cc-8655-4ddc-8b2e-681cc136c457

iphone 15 pro at last 3 months ago and then now my phone’s battery is 99%. I’m not a heavy user. I’m normally using this phone daily. Is it normal or not reduce to 99% within 3 months?

No. In three months it would be more usual to lose up to 3% so your phone is doing better than normal.

Read this thread, where it has been explained multiple times that Battery Health decline is normal and cannot be stopped.

Mar 3, 2024 7:55 PM in response to soitsjesse

Have the same issue, this is the first time I switched to an iphone i was very careful with the charging patterns but don't know what happened battery health dropped 2% within just 19 days tried contacting apple support they did some diagnostic **** and they said it's normal, really a bad experience with the iphone 15 plus

Mar 5, 2024 11:55 AM in response to Joshenz

Joshenz wrote:

iPhone 15 Pro Max only done 25 cycle since October and now battery health dropped from 100% to now 99%.

WOW! That's outstanding and far better than expected. On average, you can expect 1% - 2% decline in Battery Health per month. Since you've had your iPhone since October and you've ONLY lost 1%, you're doing far better than average. Congratulations!

Mar 11, 2024 11:34 AM in response to chellezki

chellezki wrote:

Same here. Purchased it last November 1 2023 and my phones batt capacity today is at 98% already. Last month was at 100% Can apple please replace this phone? I mean the first few months of charging the phone gets hot and it stop charging when it reach 80%. It prompt a msg that it will start to charge once phone has cooled down. Pls apple replace my phone. I think it’s defective.

Read the thread you just posted to, where it has explained this is normal, expected and will continue to drop until the health dips to 80%, when it will be time to pay Apple to replace the battery in your iPhone.

And NO, Apple is not going to replace your phone as there is absolutely NOTHING wrong with it.

Mar 14, 2024 2:37 PM in response to soitsjesse

Exactly the same with my IPhone 15 Pro Max.

Absolutely love my phone, but I got mine last year November, and it is 14 March 2024 today, and it's on 98%

I guess it's not bad, but when I had my IPhone 13 Pro Max it was almost two years on 100% battery life.

[Edited by Moderator]

Mar 14, 2024 3:30 PM in response to andries194

andries194 wrote:

Exactly the same with my IPhone 15 Pro Max.

Absolutely love my phone, but I got mine last year November, and it is 14 March 2024 today, and it's on 98%

I guess it's not bad, but when I had my IPhone 13 Pro Max it was almost two years on 100% battery life.

[Edited by Moderator]

A two year old iPhone should have dropped its battery health substantially in that time. Your iPhone is doing fine and the experience you had with your 13 Pro Max is far from the norm.

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iPhone 15 Pro Max Battery Health Dropped To 99% In Less Than A Month