Charger Heating Problem: 12 Reasons That Causing Problems.

Charger heating while charging the device

Do you want to know why your charger is heating? If you are curious about this issue, this post might help you find out why your smartphone or any other device charger is heating and, due to this, what problems it may cause to your devices and the charger.

I have listed 11 leading causes you should know about when you use chargers and feel that it is heating too fast. But before you know that, you should know about the temperature.

When a charger is used to charge any device, such as a smartphone or a laptop, the temperature of the charger slightly increases. The average temperature of a charger when used is between 35°C – 40°C for a charger when it is used for charging. When it increases to more than 45°C, this could be a red flag, and you should immediately check what’s wrong with your charger.

Here are some of the possible reasons for it.

1. Brand malfunction.

charger heating problem due to brand malfunction

During manufacturing, the battery or some parts may get damaged, or a quality check may not be done to the standards. Due to this, customers may sometimes get a malfunctioned charger while using it, which may get hot quickly. You can return the product if you buy it at any offline store by checking the charger on the spot.

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2. Using it for too long.

charger heating problem due using it for long time.

Chargers can heat it for a long duration, such as more than 8-10 hrs. We often leave our charger on the whole night to charge the phone. However, today’s chargers are smartphones and automatically stop drawing current.

3. Weather.

charger heating problem due increase in temperature

During the summer, with the temperature increase of the surroundings, it is common for all the electric devices to heat up. The same thing happens with chargers, too. They get heated up quite fast when we use them during

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4. Using it in a cozy place.

charger heating problem due using it on a cozy place

When there is a lack of airflow, it is common to observe heating problems with electric devices. When you charge any device using the charger, ensure enough room is left for air to flow comfortably. Also, this airflow can help to cool down the device.

5. Socket problem.

charger heating problem due socket problem

Using sockets over time makes them old and loose from the inside. Sometimes when the plug doesn’t fit into the socket, it may get warm. The main reason is that a loose connection generates heat and heats the overall adapter.

6. Incompatibility.

charger heating problem due to incompatibility

Incompatibility happens when your device’s charging input is less than your charger’s output or vice versa. The energy is used to charge the device, and the rest is transformed into heat. Either your device battery or the charger will heat up in this case.

7. Dirt or blockage in the connection.

charger heating problem due dirt and blockage in port

With time, dust and dirt accumulate in the adapter, which results in obstruction and improper flow of electricity through the wires. This could cause a heating problem in some devices, too. If you want to avoid this, then regularly clean your charging ports and device pins.

8. Device problem.

charger heating problem due device

When devices become old, they may cause many problems, and heating can be a significant factor. This is caused mainly due to battries as they don’t charge, the flow of energy gets disturbed, and you may also feel some heat developing on the charger.

9. Overusing it.

charger heating problem due to overuse

Overusing the same charger for multiple devices can make it heat quickly. I faced this issue while using the same charger during a night out. The main reason would be that we were not letting it cool down and using it continuously.

10. Voltage problem.

charger heating problem due volate

The fluctuation in voltage can change the temperature of the charger. When there is a sudden change in the voltage, it degrades the performance of the device and causes instability.

11. Cheap or duplicate charger.

charger heating problem due duplicate charger

Cheap chargers are made using low-cost materials such as aluminum. It consumes less electricity than copper wires and is 30% cheaper. Due to this, most companies use them to provide quantity and play with quality.

12. Transport defects.

charger heating problem due transport defects

Careless transportation of electrical products may damage them internally and cause many problems. When you use it, the heating issue is one of the problems.

How to prevent it?

To prevent your charger from overheating, here are some tips that you can use.

  • Use branded and genuine chargers.
  • Using a charger in a free space.
  • Use it with a compatible device.
  • Cleaning the charger regularly.
Manish Pandey
Manish Pandey

Manish Pandey - your go-to source for everything about chargers! I'm the creator and writer behind this blog, passionate about power solutions in our increasingly connected world. With years of experience researching and testing charging technologies—be it for smartphones, laptops, EVs, or travel adapters—I simplify complex charging concepts into practical advice you can trust. Whether you're looking for the fastest charger, the safest travel adapter, or insights on evolving charging standards like USB-C PD or GaN, ChargerPedia is here to empower your decisions.

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