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

228,980 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

Dec 18, 2023 5:54 PM in response to jenayyyyyy

jenayyyyyy wrote:

is there any effect with battery health when i charged my iphone but my phone and adaptor alwasy very hot? im using adaptor 20 watt. is that normal? because when i charged never below in 20%. do you have any advise about this? thank you

When you fast charge the phone will get warmer and the adapter will also; this is normal. It’s called the Second Law of Thermodynamics. Anything that creates or uses energy does so with some loss. That lost energy is expressed as heat. So when you charge the phone it generates heat in the power source, heat in the charger circuit in the phone, and heat as the energy goes into the battery. The faster the charging, the more heat is generated. Likewise when you discharge the battery; not all of the energy from the battery gets to the circuits that use it. Some of it becomes heat.

soitsjesse Author

Level 1

47 points

Dec 18, 2023 7:34 PM in response to Lawrence Finch

I get your trying to explain things. I think it’s just the fact that comparing other iphones to the iPhone 15 pro max shows that the battery on the new iPhone seems a bit off compared to previous batteries. I’ve had an iPhone since the 4s & I understand the battery ages but there shouldn’t be any reason why a battery ages more quickly even when charging iPhone safely & in a way to prevent battery aging to happen so quickly. Compared to my 13pro max it didn’t drop a percent in less than a month. It took over a year of using the iPhone to drop a percentage. So the fact a brand new iPhone drops a percentage less than one month of purchasing it is insane & not normal & concerning to me compared to my previous iPhones. Many other people are having the same problem. & as for over heating the phone literally would say it’s overheating when I first purchased it. I haven’t had an overheating message pop up since I started this thread. But it does get hot sometimes randomly while on the charger or wireless charging pad. As for battery life it’s still on 99%. I think turning off the background app refresh helped because the phone doesn’t die so quickly anymore like when I first purchased the phone the battery life was horrible. & till this day my brother’s battery life is at 100% when we purchased the phone at the same time & he’s constantly on his phone & charging it all the time. I just find it very weird.

Dec 20, 2023 6:55 AM in response to smolzbite

smolzbite wrote:

Hey bud, how’s your battery health right now? Still in the process of accepting the state of my battery health. Minimum usage and it still dropped to 99% in 27 days from purchase date.

Most likely it dropped to 99.9% because battery health doesn’t include the fraction. But as a normal battery loses about 1% a month you are right on target.

Dec 20, 2023 11:16 AM in response to Jeff_88

Jeff_88 wrote:

Does the price of the this iphone is equal to this battery health performance?

That sentence is a bit unclear. Can you try phrasing it in a different way?

Are you asking if the battery performance is what you would expect of a phone that costs this much? If so, that's a simplistic question with a complicated answer. The phone is more than just its battery performance. The battery is one of the easiest and least expensive parts to replace. It's considered consumable. The iPhone 15 Pro Max hasn't been out long enough to really know what the long-term battery life is going to look like. However, like all iPhones, a drop of about 1% a month is normal and expected.

Jan 2, 2024 8:13 PM in response to soitsjesse

My iPhone 15 pro max is just 2 months old but battery health is already 98%.And it either gains or loses battery of 3 to 4% everytime I restart my mobile(you can refer to the screenshot- how can battery percentage increase/decrease by more than 3% within a minute ). It has overheating issues not only during charging but also while using.Apple customer care runs a diagnostic test and says everything is normal .the service centre people had even reset my mobile but it hasn’t helped.This isn’t expected from apple.

Jan 2, 2024 9:16 PM in response to soitsjesse

Yups I purchased IPHONE 15 PRO

i'm facing the same issue within 80 cycles, i just checked today battery was on 99% I don't know it comes to this percentage today or when. I Also don't know whether it's normal or not. I'm using iphone from very long like since 11 pro. But this time I'm facing this issue. On the other hand battery backup is not so much affected. Maybe it's because of IOS version.

Athibz

Level 1

4 points

Jan 5, 2024 7:03 AM in response to soitsjesse

I’m having the exact same issue. I’ve had my 15 Pro Max for just under 2 months and I’m now at 99% battery health. The first thing I do when I get a new iPhone is optimize it. I turned off nearly all non essential notifications in settings, turn off all but one app for background app refreshing and changed my email from push to manual and here we are, experiencing battery degradation at a level I’ve never seen in an iPhone at such an early stage of ownership.

I use my iPhone daily, I’m not a heavy user either so this is deeply concerning. Apples response to this isn’t acceptable, if the device is a month old and the battery drops to 99%, imagine what it will look like in 6 months.

it’s not alright to charge $1749 cdn for a device and have this level of degradation only a month in. That is not acceptable. I’ll definitely be heading to put a push on Apple to replace this or at least start a history on these reports.

Jan 7, 2024 8:01 AM in response to soitsjesse

I purchased my iPhone 15 Pro Max on September 16, 2023. It is now January 7, 2024 and my battery health is at 99% with 62 charge cycles. I mainly use the 80% charge limit almost all the time and usually let it drop to around 20 to 30% all day before putting it on the charger. Sometimes I might charge it throughout the day if I’m on TikTok and noticed the battery drains fast. When I had my iPhone 14 Pro Max, it stayed at 100% for 9 1/2 months of usage.

Jan 7, 2024 8:22 AM in response to soitsjesse

My iPhone 15 Pro Max arrived on September 27, 2023. I had pre-ordered the iPhone on September 16. When it arrived it was at 100% battery capacity. It is now January 7, 2024 and it is at 99% battery capacity with 62 charge cycles so far. I use the 80% limit 100% of the time when I am at home and not going anywhere. I occasionally let it drop to 20% battery power before putting it on the charger. Last night I fell asleep and it got down to 13% battery power. I checked it this morning and realized that the battery health was at 99%. When I had my iPhone 14 Pro Max, the battery capacity stayed at 100% for 9 1/2 months with 119 charge cycles. When I had my iPhone 12 Pro Max, it stayed at 100% battery health for six months. I don’t know what the charge cycle count was on that particular phone.

Jan 7, 2024 1:02 PM in response to Sameer12s

Sameer12s wrote:

My iPhone 15 is 1 month old and my battery health comes to 99 I am also shocked

You are only shocked because you didn’t read the thread you posted to, where it has been explained dozens of times that a drop of 1% a month is NORMAL. I’m shocked that people post without reading what has been already posted about their issue.

Dogcow-Moof

Level 8

36,827 points

Jan 10, 2024 1:24 AM in response to tahiryaseen

It's normal.

A drop of 1-2% per month of use is normal, and expected there's nothing improper occurring.

If your Battery Health drops below 80% within one year, Apple will replace your battery for free under warranty.

There is no action for you to take.

spetcu

Level 1

15 points

Jan 19, 2024 11:34 PM in response to soitsjesse

Yes! I also have 99% at 28 cycles, iPhone 15 Pro Max!

And ofcourse that is normal to drop, it's a battery after all! It's not ment to last forever!

So only if it drops bellow 80% in 1 year, then it's a problem!

Guys, use your devices with pleasure and stop the battery health pandemic!

Jan 22, 2024 1:08 PM in response to soitsjesse

Mine is also at 98%. I only had overhearing issues the first couple of days so I don’t think that’s what’s causing it. I do think it has something to do with the recycled cobalt they use for the batteries. I love my 15 PM but man this thing is so fragile, and has had more problems than any other iPhone I’ve had ! I wish I would have waited and and kept my 14 PM.

Dogcow-Moof

Level 8

36,827 points

Jan 27, 2024 12:13 PM in response to RahulRajaan

Your battery issue is that your battery is doing better than average.

Apple states it is normal for your battery to lose 1-2% of battery health per month of use.

That means after two months it would be normal for your battery health to be in the range of 96% - 98%, so 99% is great.

Jan 27, 2024 12:14 PM in response to RahulRajaan

RahulRajaan wrote:

I had an iPhone 15 which also has a battery issue and same stuff happened to me that it's not even 2 months and my battery's maximum capacity is reduced to 99% after the update of 17.3

I'm guessing, like so many people who post in this thread, that you did not first read any of the posts. So, your homework is to go back through this thread and read all of Lawrence Finch's posts. If you're feeling especially lazy, just read his posts from today, January 27.

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