iPhone 15 heat and battery drain issue | The Apple Den | Page 1

gentle sapphire Mar 29, 2025, 11:15 AM

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Hello. I have been owning a base model iPhone 15 for 5 months. Everything was okay all that time except the last week which it has been overheating almost every day and it loses battery quickly during the overheat. I am from a country that there aren't official apple stores so i bought the phone from an official apple reseller, however if i take my phone to that store for checkup it will take more than a week for it to be checked as they will have to send it on another city. And they won't give me a phone to use until mine is fixed and i really need my phone.

I have researched the internet a lot about the overheating issues and i am going to provide as much information as i can for if someone here could help me address the issue.

So, first of all what i have noticed is that the overheating issue happens when the battery is around 30-40 percent, that's when it starts.

I'm not in a hot place or somewhere with sun, so it's not that causing the overheat.
I have disabled background activity
When it happens I'm using messenger and maybe one app in the background for example Instagram. I have been doing it for months tho and my phone is overheating only the past week so i don't think that the reason is this either
Im using ios 17.5.1 but again i don't think that my iOS version is the problem since i have my phone for 5 months and only the last week it's overheating

I don't know what i could do to solve it. Any ideas or suggestions please? I assume that messenger app is the reason of all that but I'm not really sure.

grim iris Mar 29, 2025, 2:35 PM

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gentle sapphire Hello. I have been owning a base model iPhone 15 for 5 months. Everything was ok...

Im using ios 17.5.1
You should update to 18.3.2 and wait a few days. Always update your iPhone, as these updates contain performance improvements, bug fixes, and security updates.

bright owl Mar 29, 2025, 2:36 PM

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Or 17.7.3 or whatever’s out

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But I guess that’s not an option anymore

grim iris Mar 29, 2025, 2:36 PM

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bright owl Or 17.7.3 or whatever’s out

iOS 17 is not available for devices that support iOS 18 anymore.

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Only a select few iPad models still get iOS 17 support

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They typically end support for the older OS around December

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So around when iOS 19.2 comes out, iOS 18 will not be available for supported devices

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Your only option is to update to 18.

bright owl Mar 29, 2025, 2:37 PM

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👍

gentle sapphire Mar 29, 2025, 2:39 PM

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grim iris > Im using ios 17.5.1 You should update to 18.3.2 and wait a few days. Always up...

Would that actually help tho? My thought is that since i have this phone for 5 months and it only recently started having those issues, and since I've been using the same ios those whole 5 months, if the iOS was the problem, wouldn't i have these issues since the beginning? why would they show up now? idk if i explain it well now

gentle sapphire Mar 29, 2025, 2:41 PM

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grim iris > Im using ios 17.5.1 You should update to 18.3.2 and wait a few days. Always up...

i don't really like ios 18 but ofc i will update if that's my only solution. it's just that according to my thought that i explained in the last message, it seems kinda unlikely for iOS to be the issue

grim iris Mar 29, 2025, 2:42 PM

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gentle sapphire i don't really like ios 18 but ofc i will update if that's my only solution. it'...

It might not be your only solution, but you should update.

gentle sapphire Mar 29, 2025, 3:03 PM

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grim iris It might not be your only solution, but you should update.

i suspect it's an app, specifically messenger cause when I use it i see battery draining faster. If I don't open it at all a day, my battery drains smoother

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i don't know what i can do about it tho (if messenger is the issue)

safe quarry Mar 29, 2025, 3:55 PM

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Updating can definitely make it better, but yeah take note if it happens in a particular app

And always, if you feel like it's too hot so you might burn yourself and/or the temp warning comes on, make sure you stop using the device and call apple

gentle sapphire Mar 29, 2025, 4:19 PM

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safe quarry Updating can definitely make it better, but yeah take note if it happens in a pa...

It's not that hot. Just very warm. It doesn't show any temp warnings. It hasn't heated the last like 4 days, only a bit.

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Basically my post here talks about two issues, not one. The one issue is the heat issue (which when it had happened last week 2-3 times my battery was also draining very fast) And the other issue is the battery drain which is not connected to the heat issue

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I just see my messenger app being in the top of the battery draining apps list, even higher than tiktok sometimes.(and i do watch tiktok a lot)

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Updating is my last last last option, if no other solution is found and that's mostly cause as i explained earlier in this post, it is mostly unlikely that iOS is the issue at this problem

safe quarry Mar 29, 2025, 4:31 PM

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Look if the app has an update, could also try deleting the app and downloading it again

gentle sapphire Mar 29, 2025, 4:31 PM

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deleting it or just updating it?

safe quarry Mar 29, 2025, 4:33 PM

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Try updating it first

gentle sapphire Mar 29, 2025, 4:34 PM

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messenger has 1,03gb of files and data on my device

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any Idea if that's normal?

safe quarry Mar 29, 2025, 4:35 PM

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As I haven't used facebook (and messenger) since like 2015 unfortunately I have no clue

gentle sapphire Mar 29, 2025, 4:35 PM

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i guess it is since insta has 3gb

safe quarry Mar 29, 2025, 4:35 PM

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But sounds maybe somewhat high but not like outrageous

gentle sapphire Mar 29, 2025, 4:35 PM

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so i have version 491.0.0 of messenger

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and the latest is 500.0.0

safe quarry Mar 29, 2025, 4:36 PM

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Then yeah give it an update and give it a day or two

gentle sapphire Mar 29, 2025, 4:37 PM

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okay i will update it now. but maybe messenger is not even the issue. not sure

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do you maybe have any idea how much hours of constant use should normally iPhone 15 have if the battery is completely okay?

safe quarry Mar 29, 2025, 4:38 PM

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It's a start, otherwise go down the list of the heaviest users of the battery and do the process

gentle sapphire Mar 29, 2025, 4:38 PM

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with screen on

safe quarry Mar 29, 2025, 4:39 PM

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It's very dependant on what you do with the screen on too, like if you play a huge game like Roblox or Pubg it will decrease a lot faster

gentle sapphire Mar 29, 2025, 4:39 PM

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i use tiktok mostly and messenger and a bit of instagram

safe quarry Mar 29, 2025, 4:41 PM

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TikTok is a battery drainer, like I currently have like 60%, lost 38 of those 40% to TikTok scrolling through it this morning for like 3-4 hours lol

gentle sapphire Mar 29, 2025, 4:41 PM

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you have the same phone too?

safe quarry Mar 29, 2025, 4:42 PM

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Nah I got 16 PM

gentle sapphire Mar 29, 2025, 4:42 PM

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ohh

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btw a questiob

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do you know if the following thing is normal? I charge my phone and let's say i plug it off at 80%. Then if i restart the phone, it will show higher battery, let's say 85. it happens always after charging. Does that mean my battery has an issue?

safe quarry Mar 29, 2025, 4:45 PM

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I haven't personally heard of it doing that before... That said it is Apple so wouldn't surprise me if it's a feature with the 80% charging cap thing

gentle sapphire Mar 29, 2025, 4:46 PM

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yes i thought that it could be cause of the 80 limit but I've disabled it and im using optimised charging but it still happens

safe quarry Mar 29, 2025, 4:46 PM

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Hmm, it doesn't sound like it should do that, let me do some googling

gentle sapphire Mar 29, 2025, 4:46 PM

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okayy

safe quarry Mar 29, 2025, 4:47 PM

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"The battery was at 97% when you charged it. But, this number took into account that there were several apps running at the time, so that was figured in the 97%.

When you restarted the phone, those other apps that were running before were no longer running, so the battery figure reflected the change that the apps were no longer running, so it showed a higher battery figure.

Your battery is fine. "

Apple community site for the win

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Some more googling and yeah I was kinda right with the 80% cap, but infact it happens all the time

gentle sapphire Mar 29, 2025, 4:50 PM

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oh so it's not an issue?

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i have another question btw

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do you know if it's true that your battery drains slower if you don't close apps in the background and always let them running?

safe quarry Mar 29, 2025, 4:58 PM

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I think it's true yes but I also think it's minor enough that as long as you're not planning on using the phone for several days without charging it's not worth it

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Basically, if you don't close them it's completely fine, but if you accidentally close an app or need to close an app because it's not working as expected you're not going to die over it

bright owl Mar 29, 2025, 6:16 PM

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It's recommended to not close them, at it takes more battery than if you did close them because of iOS's amazing memory management.

gentle sapphire Mar 29, 2025, 6:37 PM

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bright owl It's recommended to not close them, at it takes more battery than if you did clo...

so if you don't close them your battery will drain slow than if you closed them?

gentle sapphire Mar 29, 2025, 6:38 PM

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safe quarry Basically, if you don't close them it's completely fine, but if you accidentally...

but what if i open an app and then use it again after 4 hours? wouldn't it consume less battery if I closed it and then opened it after 4 hours?

bright owl Mar 29, 2025, 6:45 PM

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gentle sapphire so if you don't close them your battery will drain slow than if you closed them?

Basically, closing them typically does nothing different battery wise than if you just left it in the background
This is because iOS suspends apps in the background
And if you close it, next time you have to use it, it’ll use more battery and ram to completely open it again from scratch
But if you suspend it, next time you have to use it, it just continues where iOS suspended it

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Make sense?

gentle sapphire Mar 29, 2025, 6:50 PM

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bright owl Make sense?

yess i just feel like my battery drains faster if i have many apps in the background but idk it could just be my feeling

bright owl Mar 29, 2025, 7:18 PM

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gentle sapphire yess i just feel like my battery drains faster if i have many apps in the backgr...

Some apps, like health apps, will run background processes in the background
And also games can take up background power

gentle sapphire Mar 29, 2025, 7:22 PM

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bright owl Some apps, like health apps, will run background processes in the background And...

what about social media apps and tiktok? better to close them or keep them in the background? also i have backgroynd activity turned off

gentle sapphire Mar 29, 2025, 7:44 PM

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btw I'm gonna post here my last 10 days average battery stats, maybe it can help someone help me about my original issue on this post.

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so the average battery summary of last 10 days is:
Messenger (it says notifications). 36%
Tiktok 25
Insta 21
YouTube 11
Average screen on time: 7 hours 27 min
Average closed screen: 42 mins
I have iPhone 15, i always charge it once it reaches 20 and charge it until 80. Is my screen time fine or should it last more? Do any of my apps use more battery than they should?

bright owl Mar 29, 2025, 8:10 PM

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gentle sapphire what about social media apps and tiktok? better to close them or keep them in th...

Uh idk there
You can keep them open, shouldn’t do anything bad

gentle sapphire Mar 29, 2025, 8:25 PM

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bright owl Uh idk there You can keep them open, shouldn’t do anything bad

okayy

gentle sapphire Apr 1, 2025, 7:30 AM

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any help?

safe quarry Apr 1, 2025, 6:19 PM

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If you are still worried about your battery you should contact the support, let them test the battery for you

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At this point there is nothing more we can do here

gentle sapphire Apr 1, 2025, 6:44 PM

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safe quarry If you are still worried about your battery you should contact the support, let ...

im outside the us and no authorized apple service shops here

safe quarry Apr 1, 2025, 6:57 PM

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You can always call the support anyways

gentle sapphire Apr 1, 2025, 7:01 PM

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safe quarry You can always call the support anyways

yes but they can't test it from a call right?

safe quarry Apr 1, 2025, 7:02 PM

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They can test to see that the battery is there, legit and working

gentle sapphire Apr 1, 2025, 7:03 PM

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from call?

safe quarry Apr 1, 2025, 7:04 PM

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Yep

gentle sapphire Apr 1, 2025, 7:04 PM

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safe quarry Yep

okay btw can you help me with my app store?

safe quarry Apr 1, 2025, 7:05 PM

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Is it the apps not updating automatically?

gentle sapphire Apr 1, 2025, 7:05 PM

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yesss

safe quarry Apr 1, 2025, 7:06 PM

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You have it set to auto update right?

gentle sapphire Apr 1, 2025, 7:06 PM

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yes

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and i have WiFi connection normally

safe quarry Apr 1, 2025, 7:06 PM

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Latest iOS as well?

gentle sapphire Apr 1, 2025, 7:07 PM

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nop 17 but on my friends phone with same ios they do update

safe quarry Apr 1, 2025, 7:27 PM

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Hmm, I would suggest the update then just to rule out it being anything with the OS

#iPhone 15 heat and battery drain issue