Friday, September 20


A surprising finding by scientists from the American Chemical Society shows that wireless charging is exactly the cause of your battery draining and reducing life expectancy faster.

For many users, the most important parameter on a smartphone is battery life. Indeed, because if the battery is low, even if your smartphone has a screen that has a high resolution, how bright it is, it cannot be displayed. The same thing with chipsets, without a strong enough battery, the Snapdragon 855 or 439 will also provide the same bad experience.

Although manufacturers have announced battery capacity on smartphones, one detail they rarely share is the battery’s maximum charging cycle, and if using a wireless charger, the charging cycle is dark. may be shortened.

The reason why wireless charging makes the battery life decrease quickly was shared by the American Chemical Society (ACS) recently. According to PhoneArena, wireless charging technology uses wireless charging cores and creates many different sources of heat. Improper wireless charging will produce more heat and shorten battery life faster. This is because the wireless charging system must increase the power to adjust the charging current because the charging core is not located properly on the charging dock. This makes the device hotter.

As the report pointed out, temperature is the number one enemy with battery life. The higher the temperature of the machine, the faster the battery will lose and the ability to store electricity. A chart in the ACS report shows, in order to get the maximum battery life, the environment temperature that smartphones should contact is between 15 and 40 degrees C.

The appropriate temperature threshold for obtaining the longest battery life is between 15-40 degrees Celsius

Researchers compared charging smartphones with conventional wired methods with wireless charging with charging cores in the device.

When using a normal charging process, the temperature does not exceed 27 degrees Celsius. Meanwhile, wireless charging causes the device temperature to reach 30 degrees Celsius and decreases as the device is about to fully charge. Wireless charging improperly leads to higher temperatures.

Here are some suggestions you can take to increase the life of your smartphone battery while still using the wireless charging feature.

  • Do not charge when the ambient temperature is too hot or sunlight is shining
  • Do not charge while running any complex tasks such as gaming to avoid excessive heat generation.
  • Remove smartphone protection case for better heat dissipation.
  • Align the position of the wireless charging core on the device to the center of the wireless charging dock.
  • Use a fan to cool the phone while charging.

It is worth noting that the above report does not mention the temperature generated by the recently appeared feature on high-end smartphone models that are wireless reverse charging. Currently Huawei Mate 20 Pro, P30 Pro, Galaxy S10 / S10 + and Galaxy Note 10 / Note 10+ all support this feature.

This feature allows you to charge small devices like wireless headsets, smartwatch or even another smartphone with wireless charging just by placing them on the back of another smartphone. In other words, the back of the device is treated as a replacement dock when needed. Apple is also expected to feature wireless reverse charging in the iPhone 2019 and is expected to be announced in September.