iPhone Gets Hot While Charging? How To Fix the Problem

iPhone overheating is a common problem that many iPhone users like you face. It can be irritating and frustrating to deal with your phone getting too hot. This article will dive into why your device generates too much heat, knowing when it’s overheating, and how to prevent it.

Why Your iPhone Gets Hot While Charging

There are many reasons your iPhone might get hot while charging.

iphone gets hot while charging

iPhone CPU

The CPU of an iPhone is one of the causes of the phone getting hot while charging. The CPU handles all the data processing, graphics, and audio-visual output. It becomes a heating issue when it has to work harder to process data on a slow or congested network or when you heavily use the apps on your device. It will cause your phone to heat up significantly.

iPhone battery

Your phone overheats when it charges because of the lithium-ion battery inside of it. When you plug in your device to charge, it draws power from the charger and converts it into energy to power up your device. This process causes heat generated by the battery, which can cause your phone to become warmer than usual.

Your phone also gets hot while charging because an electric current runs through it. As a result, it causes chemical reactions inside the battery. These reactions are exothermic, meaning they produce heat.

But if your phone gets hotter than expected, it could suggest your battery is defective.

Faulty battery

The lithium-ion batteries in iPhones are prone to overheating. That’s because the battery’s chemistry causes it to generate heat.

For a faulty battery, the heat generation is always more than what it should be. Heat generation leads to a higher rate of chemical reactions, which leads to more heat being generated.

It can lead to the battery swelling up and eventually catching fire. 

Using iPhone while charging

Charging your iPhone while using it can lead to overheating. It leads to overheating because charging the phone while using it causes the processor to work harder, which creates more heat. The battery also has a few cycles before it needs to be replaced or recycled.

 Maximum temperature envelope

The iPhone generates and removes a certain amount of heat. If your phone gets too hot, it will give you an error message. The phone has a built-in thermal sensor that measures the device’s temperature. And if it reaches a certain threshold, the phone will display an error message.

The point is different for each model, but it can be as high as 95 degrees Fahrenheit (35 degrees Celsius).

Heavy streaming

Heavy streaming causes the iPhone to overheat because it uses more power than usual. The phone needs to work harder to keep up with all the videos being streamed, and this causes it to use more energy and heat faster.

Exposure to the sunlight

The sun’s rays cause the phone to overheat. The iPhone has a battery that is not designed to be charged for extended periods, and prolonged exposure to sunlight will cause the battery to heat.

The iPhone gets hot while charging because it absorbs the heat from the sun and converts it into electricity.

Defective charger

A defective charger can cause the iPhone to overheat while charging. This happens because when an electrical current passes through a wire, heat energy is generated. When this energy accumulates inside the phone, it will emit heat and cause it to overheat.

Excessive charging

The battery is designed to regulate its temperature. The processor will throttle down when it is too hot, and the phone will shut off if it reaches a certain level. If you keep charging the phone, it will continue to overheat because the battery cannot cool down.

iPhone software problems

Software bugs are a common problem on many devices. The iPhone is not immune to this issue. Software bugs have caused some iPhones to overheat. This can lead to a loss of battery power, decreased performance, and even an inability to turn on the device.

How to Fix iPhone Getting Hot While Charging?

Here are a few practical ways to fix iPhone getting hot while charging.

iphone gets hot while charging

Act immediately

Do the following to prevent further damage to your phone.

  • Unplug the phone and turn it off.
  • Protect your iPhone from the stove, including sunlight and artificial heat sources.
  • Place it on a clean, flat surface free of any other objects within a few inches.
  • Turn it back on after a few minutes, but keep it in Airplane Mode for a while.

Check the temperature of the surrounding environment

The ambient temperature in your room might be too high, and your phone has trouble dissipating heat properly. It can cause your phone to slow down and eventually stop.

Make sure your phone is getting enough ventilation. You might buy a case with good air circulation if you’re not charging your device on a wireless charger.

Minimize CPU activities

The CPU on an iPhone is a small chip that controls the phone’s operation. This includes sending and receiving data, storing data, and processing instructions.

However, you need to cool down the CPU for this process without problems. If the CPU is not cooled down enough, it will overheat, leading to significant issues with the phone. 

Some of the basic things you can do to cool down your iPhone are limiting CPU activities like games and apps. You should also avoid using the phone in areas in direct sunlight.

Update the software and apps

Updating your iPhone’s firmware and apps is essential for preventing overheating on your device. When you update your firmware and apps, you ensure they are compatible with your device’s hardware and software. And they’ll run at their optimal capacity.

Take the following steps to update the software.

  • Navigate to the Settings menu.
  • Select General, then Software Update.

Disable background app refresh

Your device can also overwork; its CPU overheats if the background app refresh is active. Turn off this feature in the Settings menu using the following steps.

  • Go to Settings
  • Hit General
  • Choose Background App Refresh
  • Disable this option by selecting Off

Uninstall crashing app

An installed app can cause your iPhone to slow down, crash, and generate too much heat. Remove the app to stop your device from overheating. Follow these steps.

  • Navigate to Settings.
  • Scroll down to the Privacy section.
  • Find and tap on Analytics & Improvements.
  • Choose Analytics Data. You’ll find the app that is causing your device to crash.
  • Go back to your home when you find the app, tap, and hold it down before selecting the Remove App option.

Restart your iPhone

Reset your iPhone after trying the above tricks. Here are the steps.

  • Navigate to Settings.
  • Next, choose General.
  • Select the Reset option.

DFU restore your iPhone

DFU restore is a process that can restore your iPhone from a backup. It can also help fix issues that might happen with the device. DFU stands for Device Firmware Update and restores your device to its default settings and deletes all data on it.

Follow these steps to DFU your device.

  • Plug your phone into your computer, ensuring Finder or iTunes are accessible.
  • Press down and release the Volume Up and the Volume Down buttons.
  • Hold down the side button until your screen becomes black.
  • Again, hold down the Side and Volume buttons simultaneously for five seconds.
  • Let go of the Side button while you keep pressing down the Volume button for another five seconds.
  • Your laptop should display the DFU message if the process is successful. 
  • Click OK and the Restore iPhone feature.

Inspect your cables

Check the cables of your iPhone charger to prevent overheating. The friction causes the overheating of the cables between the wire and the insulation. The heat from this friction can cause a fire hazard.

The wires inside your cable could break, which would cause the insulation to fray and expose bare wires. It can create a path for electricity to escape and reach an outlet or other conductive material that will complete the circuit.

Use an Apple charger to avoid overcharging your smartphone.


It can cause your phone to overheat in two ways:

  • The high brightness level will require more CPU and GPU power, increasing the temperature.
  • The screen brightness can emit heat from the screen itself, which will also increase the temperature.

Remove your case

A phone case is a protective cover to prevent damage to your phone. But it can lead to your device overheating. Let your phone cool down by removing the case.


Apple has created devices that have many radios. These radios are responsible for connecting to cell service providers or Wi-Fi networks and providing GPS location data. These features are great, but they also create a lot of heat inside the phone. It leads to an overheating problem with iPhones.

Repair your iPhone

Take your phone to specialists like Apple technicians if you have tried all the above methods to stop your gadget from overheating. 

How to Know When Your iPhone Is Overheating?

If you notice your iPhone getting warmer than usual, then there are a few things that you can do to find out the cause of the problem. Read on to learn more about what to do if your iPhone is overheating!

  • Something is wrong with your phone screen. Your device is overheating when the screen turns black with the light slowly dimming.
  • When your phone is overheating, it won’t use the camera flash. It shows that it’s generating too much heat.
  • When your phone refuses to charge or charges slowly, it’s overheating.
  • If your device runs slowly and doesn’t load videos and apps as quickly as it used to, it could be overheating.
  • A message on your screen states that you need to cool down your iPhone.

Bonus: How To Know if Your iPhone Is Fully Charged?

How To Know iPhone Is Fully Charged?

The instructions below can help you determine if you have entirely charged your iPhone.

  • Connect your smartphone to an electrical outlet using the adapter you received with the phone.
  • Let the phone charge naturally. If you use some of the battery’s charge to juice the device, it might take longer to charge.
  • Examine the battery symbol in the upper right corner of your iPhone. It’ll show if the iPhone is “Charging” or “Rained.” The icon is a lightning bolt when your phone is charging. It’s an electrical plug when fully charged. Only the iPhone 3GS will show the charge percentage.
  • Disconnect your iPhone from the charger. Also, unplug the charger from the power source.

FAQs: iPhone Gets Hot While Charging

Is it bad if my iPhone gets hot while charging?

It depends. If your phone is hotter than expected, it’s a bad thing. Overheating can damage it and the battery. Some possible causes include:

  • a charger with a lower power output;
  • a charger that doesn’t support fast-charging;
  • or an older battery that can’t handle the amount of power being delivered.

Why does my iPhone heat up while charging?

  • Phone case
  • Defective battery
  • Hardware and software problems
  • Sunlight and other sources of light
  • CPU congestion

How do I stop my iPhone from overheating while charging?

Keep it in a cool place; this will help keep the temperature and prevent any damage. Use the original Apple charger, which is specifically for the iPhone. It’ll give your device enough power, causing no damage or overheating.

What temperature can an iPhone withstand?

Use iOS and iPadOS devices where the ambient temperature is between 0º and 35ºC (32º to 95ºF). Low- or high-temperature conditions may cause your device to change its behavior to regulate its temperature.

How can I check the temperature of my iPhone?

Purchase an external thermometer to use with an iOS app to check the present temperature, historical temperature, and humidity. This will allow you to inspect the room temperature with your iPhone correctly.

Brett Jones
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