My iPhone 15 Pro Max heats up when charging

I have recently bought 15 pro max. But my phone heats up when charging. Its not normal on a new phone as i have used all apple genuine charging adapter and cable.


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iPhone 5, iOS 9

Posted on Nov 1, 2023 9:02 AM

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Posted on Oct 25, 2024 5:40 PM

hukalatorium wrote:

I wish there was a way to adjust charging speed with a setting.
This issue only occurs when using a modern charger with high power. Charging with the power adapter that came with older iPhones and a USB A to C cable does take longer, but the phone does not heat up much at all.

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. In particular, fast charging with a 20 watt power source will cause any smartphone to get very warm, so warm it may have to pause charging to cool down after 30 minutes or so.


This won’t do any harm to the phone, but if you don’t want it to happen use a lower current power source or charge wirelessly.

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My iPhone 15 Pro Max heats up when charging

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