My iPhone 15 Pro Max heats up when charging

IphoneProMax15 wrote:

Me too , switch all the APP ,WIFI , Data , still super hot. i am very sad from the day 1 i have this iPhone 15 pro max. within 7 days, the shop studio don't accept return or change.. i spent 2000SGD plus , i hate this super hot apple phone. i went to Apple customer service, their technical said, " hot is normal, mine is same as yours".

How to do ? i went to the studio shop and apple service center at orchard road, Wasted my time and energy, nobody can help........

I guess you too did not read the answer already posted in this message thread.

it is super super hot when charging the iPhone 15 pro max, it is totally not normal..... switch all running APP , WIFI, flight mode , still super super super +++ hot. I bought recently , i extremely dislike /hate this phone. no help from Apple company.

I can only write my feeling here as they don't accept return or change to another phone even within 7 days.

Brother i dont think you realize the problem here. Who uses a 7.5 w charger when Samsung, Xiaomi, and Huawei all have 60+ w chargers and their phones dont even get that hot. My iPhone 14 Pro barely gets even warm when using a 20w charger. This is seriously a problem.

Phildo8 wrote:

(Apologies for such a long drawn out comment) I’ve been in wireless sales/repairs for 20yrs maybe I can inform on the topic. You’re not alone this happens to my iPhone 15 Pro ALL THE TIME whenever it’s charging & I’m using it to play a game, play music, browse online, etc. without fail after 30-45mins at most I’ll get the pop up saying “Charging will resume when iPhone returns to normal temperature. I do have some “informative” input. It IS an iPhone 15 Pro/Pro Max issue.

Sorry, it is not an “issue”. It is a FEATURE that was added in iOS 16 to all iPhone models that support it. When you fast charge a phone it gets warm. Physics rules, specifically the 2nd law of thermodynamics. The phone pauses charging at 80% to allow the accumulated heat to dissipate. All iPhones always have paused at 80% when fast charging. The only difference is that with iOS 16 Apple added a message that it was pausing; it is not a change in operation, it is only letting you know what it has always done.

The irony is that before this message was added this forum had a steady stream of posts “why does my phone stop charging at 80%?

Well said Dave, my point as well!!

If the phone gets too hot to operate safely it shuts down. If that hasn’t happened it is within its normal operating range. It is not a problem of any kind, big or small. ALL battery operated devices will get warm in normal use, and (if you like) hot if you are stressing it to its limits. Specifically, if you fast charge it, use it with cellular data with a weak signal (especially 5G), use the camera for extended periods of time, watch videos, or play interactive video games. Or do any of these things while charging it. And it will get even hotter if you have it in a fully enclosing case, because then there is no way for the heat to escape.

Same here, whenever i charge my iphone 15 pro max 512 GB, my mobile gets so hot. i bought this mobile in Dec end 2023. i bought this by seeing the social media news that over heating is solved in this mobile, but it is not true.

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. 

If you use the cellular network for voice or data, converting energy to radio frequency signals is very wasteful; only about 30% of the energy that goes into the network components comes out as radio signals, the other 70% becomes heat. And signal strength matters; a 1 bar signal requires that the phone boost its transmitter power to maintain a connection, and it isn’t linear. 1 bar uses 10 times as much energy as 4 bars. You didn’t mention your phone model, but an iPhone 12 or newer (including SE 3rd edition) with a 5G signal uses about twice as much energy as an LTE signal, and 5G towers are still not as densely distributed as LTE, so the signal is likely to be weaker, compounding the problem.

Lawrence, you are doing your best in explaining this catastrophe. It’s difficult to defend this over heating of iPhone 15 pro max. I have one now but trust me I regret buying it. Why are other iPhones doing well with managing heating? I honestly think Apple should swallow the pride and help people with those devices.

Did you use a 20 watt charger with your iPhone 12? Are you using a 20 watt charger with your iPhone 15?

No it is not a problem, but if it bothers you don’t fast charge it. Get a 7.5 watt wireless charge pad or use a 5 watt Apple “cube”.

Mine heats up even while online

So you’re saying the iPhone 15 pro/pro max is an inferior product when comparing to the 13/14?

Its true, I haven't used it more than my old phone and my new 15 pro max gets crazy hot. It hurts to touch it.

Agreed