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Wireless Charger Overheating? Here’s what you can do

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Wireless charging is ramping up to be the future of smartphone power delivery, with companies like Apple already taking it mainstream with MagSafe charging in the iPhone 12. But wireless charging has its fair share of problems that users regularly face, the most notable of which is overheating. It’s so bad that Apple had to abandon its AirPower mat wireless charger due to the intense heat melting the wires.

Overheating triggers smartphones to stop charging till the temperature decreases, leaving it inadequately charged over shorter time intervals. In the long term, heat will degrade your battery and lead you to replace it, wasting time and money in the process.

Reducing the heat produced in wireless charging will improve your battery’s health and let you have no problem leaving your phone on a wireless charger overnight as the battery will remain at a comfortable temperature. If you are always irked by your wireless charger overheating frequently, then we’ve got some handy tips that can help you resolve the issue.

Why does my Wireless Charger Overheat?

How a wireless charger functions. Image Credits: Belkin

Wireless chargers make use of tightly coiled copper wires to produce a magnetic field. In a process known as induction, this magnetic field generates a current in a similarly coiled copper wire in a smartphone or accessory that will charge the corresponding device’s battery. The process is not 100% efficient and will generate a lot of heat as the current flows.

Although inefficiency produces a lot of heat, it’s also possible for the magnetic field to come in the vicinity of a metal object and create eddy currents, generating a lot of heat and even preventing the device from charging wirelessly. That is why most smartphones that charge wirelessly come equipped with a glass back to minimize heat and current loss.

Tips on Preventing your Wireless Charger from Overheating

Time needed: 15 minutes.

If you happen to have heating problems with either your smartphone or accessory, we suggest you consult these potential fixes. We have browsed through several guidelines from manufacturers like Samsung on wireless chargers overheating and listed the best fixes below:

  1. Check for any obstruction

    Make sure that the smartphone or accessory lies flat against the surface of the charging pad. Ensure that nothing is present between the phone and charger. Any magnetic case, smartphone mount, or metallic object will significantly increase heating and reduce the charging performance. You also run the risk of damaging items like credit cards and RFID tags frequently kept in smartphone cases, so remove them before charging. 

  2. Align the charging coils

    If your device is overheating, remove it from the case to better align the charger and the coil. It also helps keep the back of the device well-ventilated, further bringing the heat down. Smartphones and accessories also wirelessly charge faster when free of any protective coverings.

  3. Remove any connected USB cables

    Do not connect any charging cables while wirelessly charging, even if it is for transferring data. Many smartphones will not wirelessly charge when connected by USB. 

  4. Use original components

    Make sure you’re using original batteries in your smartphone. A third-party replacement battery will not provide the same charging quality and can frequently overheat and even explode. Make sure the wireless charger comes with Qi wireless certification and check if your device officially supports it.

  5. Ensure the wireless charger is free from damage

    Ensure that the wireless charging pad is not damaged or torn. Over time the material tends to wear out or crack and expose the coils increasing short circuits’ chance.

  6. Check if your wireless charger has overheating protection

    Check if your wireless charger cut-offs charging at higher temperatures and once the battery completes charging. Many low-quality wireless chargers will not have a proper mechanism in place, so check your smartphone regularly.

Wireless Chargers like the OnePlus Warp Charge 30 Wireless come with an inbuilt fan for active cooling. Image Credits: OnePlus
Wireless Chargers like the OnePlus Warp Charge 30 Wireless come with an inbuilt fan for active cooling. Image Credits: OnePlus

If none of them happen to work, we recommend you go with a wireless charger that implements active cooling to keep temperatures low. Wireless charging is still not developed enough to provide the level of thermal efficiency as traditional wireless chargers. Custom wireless solutions like OnePlus’ Warp Charge 30 charge at high speeds and need adequate cooling to prevent heat buildup. 

If you loved this article and want to know more about the latest tech, we recommend you head over to our homepage and bookmark it for further updates. Please share this with friends and family if you feel they need help with overheating wireless chargers.

About Paul Jacob

As an avid hardware enthusiast, Paul always takes the opportunity to explore the underlying technology through teardowns of the laptops, smartphones, and graphics cards he owns. He is also pretty passionate about stuff like sideloading the latest Android ROM to his smartphone or tweaking the processor clocks on his laptop to improve performance and lower temps.


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