iPhone 15 hot when charging

I noticed my Iphone 15 overheating when using a USB-C / USB-C cable. I could charge my phone from 1 to 100% in about 90 minutes. However it got very warm, especially early in the charging cycle. That kind of heat can't be good for the battery over time. So, I tried charging with a USB-A / USB-C cable and charged my phone from starting near 0%. No over heating, but much slow charge cycle (about 4 hours to fully charge). That's not a big deal for me since I usually charge my phone over night or plug it in when sitting at my work desk. I'm just thrilled that my phone is no longer heating up while charging (and hopefully the phone battery will thank me by lasting longer).

Remove case and charge

Hi I recently bought a iPhone 15 and had the same issues. Here's what resolved it for me:

follow all the settings suggestions here: 

Google to find the YouTube video "25 Hacks To Fix iPhone Battery Drain" and "[iOS 17.2 Battery Drain]" on a channel called "Payette Forward" (sorry can't paste links, Apple censors them out)

then use a 15w charger instead of a 20w one. It still charges fast (23% in 7 mins) 

this yielded mild warmth and resolved the overheating issue

If somebody have enough time for charging, better use 5W old iPhone charging brick and normal USB to C type cable. It takes longer time to charge, but the phone remains normal cool even you charge 0 to 100% in a single go.

if needed any support from me, drop me your concerns at nis***********@gmail.com

[Edited by Moderator]

I usually charge it in a room where AC is on Or you can use the 5 watt adapter

That’s the only solution as of now until Apple resolves it via software update

yasheel wrote:

I use the 35 watt MacBook Air charger and it gets slightly warm. Should I buy the 20 watt charger?

Most people are unaware that the charger in built into the phone. Whether you use 20w or 35w charging plug won't make any difference. And warm is 100% normal when charging a battery. It's impossible for a charging battery NOT to put out heat. It's the physics of charging.

Charging the battery in an iPhone generates heat. That is not unusual or something to be concerned about.

You are not speaking with Apple, so you have not escalated a complaint here at all. But there is really no reason to escalate a complaint when it is normal for the battery to generate heat while charging.

I own iPhone 15 Pro Max and 15 Pro. No excessive heat at all. If you think your phone is getting too warm, that's what the one year warranty is for. Schedule an appointment at your Apple Store Genius Bar and let Apple test your phone. No point in complaining here on this user to user only forum. No one from Apple participates here.

A week before to purchasing my iPhone 15 Plus, I experienced the identical problem with charging. When charging with the case, it becomes really hot; it's better without the case. Is this a result of mobile body material or some kind of software bug? In brief, Apple has to take this seriously.

When i am charging the phone with 30w or 40w adapter there is no heating issue. Have anyone tried charging with different adapter? Can we use 30w adapter for charging?

The physics of batteries dictate that when being charged they generate heat. If you are you using a 20w charger to charge your iPhone it will generate more heat than using the old standard 5w charger. Since it is normal for batteries to become warm while being charged, it would not be something to be concerned about in terms of longevity.

Whether you should purchase AppleCare is up to you. AppleCare covers much more than just the battery, so for me AppleCare+ is a must. But be advised you only have 60 days from original date of purchase to add an AppleCare+ plan.

iKritham wrote:

I brought 15 last week and updated to 17.4.1 even though while charging it’s getting heat and normal using time feeling some heat

Charging an iPhone generates heat. Using an iPhone generates heat as the battery is working to power whatever you are doing at the time. Playing video games, taking photos, streaming music, all push the battery, which generates heat.

Hello everyone,

I purchased an iPhone 15 plus in Sep 2023 but after updating to the iOS 17.* version, I suddenly feel that a heating issue increases while charging my phone generally between 20% to 75% and then it start cooling after that.

But it was so hot that i can't handed in and use my phone.

Very sad to the iPhone battery management team. Please kindly do needful in next release.

Doesn't it make battery life in question when difference in watts and volts? Let's say 9v x 2.2A - is what needed. If the charger produces 4.3v x 3A or 4.3v x 4.6A or 4v x 1.3A. I am afraid this fluctuation in current may lead to cause issues to battery.

I tried to test with third party app (not sure if its reliable). It never shows the charge produces 9V x 2.2A. All I see is the ones I mentioned above.