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Why Does My iPhone Get Hot When Charging? Here’s How To Fix It?

Lithium ions in sodium solution react with metal electrodes in the iPhone battery.

These ions travel from one side to the other when the battery charges, producing heat. Although a bit of heat is OK, the iPhone should never get too hot to touch.

iPhone CPU

The iPhone contains a CPU that powers the operating system, apps, and even basic operations like call reception.

Each computation done by the iPhone costs energy, some of which is lost as heat.

If you use your iPhone a lot while charging, you risk overheating it and bringing it dangerously near to a critical temperature.

Using iPhone While Charging

Apps are any applications that are pre-installed on the iPhone or may be downloaded from the Apple Store. You may use applications while your iPhone is charging.

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However, the device’s temperature will rise if you operate too many of them simultaneously. Consequently,

Overloading the iPhone’s thermal load may shorten its battery life and potentially harm its delicate internal components.

Maximum Temperature Envelope

The phone was built to create and remove a specific amount of heat. If the iPhone becomes too hot, an error message indicates that the “iPhone must cool down before usage.”

This error message appears when the temperature of the iPhone reaches a critical threshold.

This may be prevented by just utilizing the most important functionalities of your iPhone while charging. For example, you might want to limit yourself to a single app for making and receiving phone calls.

How to Determine When an iPhone Is Completely Charged?

The iPhone is a multimedia and cell phone device manufactured by Apple. Your iPhone will need to be recharged regularly, and it may take up to an hour to charge, depending on the current battery level.
The following are the actions to take to guarantee that your iPhone is fully charged:

Step 1: Plug your iPhone into an electrical outlet using the charger that comes with it.

Step 2: Let the phone charge by itself. If you use a portion of the battery’s charge to operate the machine, charging will take longer.

Step 3: Look for the battery icon in the upper right corner of your iPhone. This will show if the iPhone is “Charging” or “Rained.” When the phone is charging, the symbol is a lightning bolt; when ultimately set, the icon is an electrical socket. Only the iPhone 3GS will show a percentage of battery charge.

Step 4: Disconnect your iPhone from the charger and the charger from the power source.

What Causes My iPhone To Heat Up?

During operation, all devices, including the iPhone, create heat. While an iPhone’s processor consumes less power than a desktop computer, its heat must be dissipated to prevent overheating.

The heat is pushed directly into the body of the iPhone, with no room for fans or vents as on a PC.

However, you should not be alarmed if your phone becomes hot when handled until it displays a warning.

Components That Produce Heat

The following components can cause your device to overheat:


The CPU on the iPhone creates the most significant heat by executing the computations necessary to operate apps and render visuals.

The more power the CPU uses, the more heat it creates, resulting in a hot iPhone when performing processor-intensive tasks.

Playing a game with 3D-modeled images, for example, burns more energy and creates more heat than listening to music. Return to the home screen and let the CPU rest to cool your phone fast.


While the iPhone’s several wireless radios (for cellular service, Wi-Fi, and GPS) are active, they create heat.

The cellular radio, in particular, significantly impacts the phone’s temperature.

During long calls, this causes it to grow heated. While ending the call removes the issue, using a Bluetooth headset to avoid holding the heated phone up to your ear is a good idea.

The Screen

The LED backlight on the iPhone creates less heat than a fluorescent-backlit LCD TV. This is because a brighter screen creates more heat.

Dimming the screen’s brightness might aid in cooling the phone. If the phone becomes dangerously hot, it will automatically darken the screen to maintain a safe temperature.

The Battery Charger

Charging a battery creates heat, so your phone may feel warmer when plugged in than when fully charged.

To protectagainst  harm, the iPhone will automatically turn off charging if it grows too hot. Charging resumes when the phone has cooled down.

Safe Operating Temperatures

Apple recommends that you avoid using your iPhone in temperatures above 95 degrees Fahrenheit. That doesn’t mean that if you use your phone for a few minutes in 100-degree temperatures, it will explode. However, it may shut down or notify you.

If you have to use your phone while it’s hot, avoid activities that create a lot of extra heat, such as games and long talks.

Even while not in use, Apple suggests keeping the phone at or below 113 degrees Fahrenheit, so don’t leave your iPhone in the car.

According to the National Highway Traffic Safety Administration, even on a cold 70-degree day, a parked car may achieve temperatures of above 115 degrees inside.

Is It Normal for an iPhone to Get Hot When Charging?

When your phone is charged, the ions in the battery travel from one side to the other. Finally, this reaction generates heat. Although a little heat is OK, the iPhone should never become so hot that it hurts to touch.

4 Ways an iPhone Can Get Hot, And How to Fix It

When you use your iPhone, the battery and other components create heat. Although the iPhone is designed to disperse heat, an ageing battery, too many open applications, or even direct sunlight can cause it to overheat.

Several variables, including the following, contribute to the heat created by your iPhone:

Defective Battery

A malfunctioning battery generates heat and may overwork itself unnecessarily, and heat is surely one of the symptoms. Take note if you receive a notification that your battery needs to be changed.

To confirm this, go to Settings > Battery.

Exposure To Sunlight

Direct sunshine may dramatically increase the temperature of the atmosphere. When you combine it with the heat created by your phone’s many operations, you have an overheated iPhone.

Too Many Applications Running

Having many apps open at the same time causes your iPhone to work harder, creating heat. Double-clicking your device’s home button will let you cycle through all currently active applications, then swipe upward to dismiss apps you don’t use frequently.

Heavy Streaming

One of the most power-intensive things your phone can undertake is keeping the screen active. Unsurprisingly, online streaming causes a lot of heat.

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