The wireless charging technology is not a novel technology. But many people still do not understand it. One of the problems is whether wireless charge’s radiation is harmful to people or not. Somebody even worried: “The wireless charger’s radiation is even greater than the mobile’s radiation”

So how much radiation will wireless phone charger bring in daily use? Will it harm our health and safety? The researchers from CCTV think they have found the conclusion.

whether wireless charge's radiation is harmful to people or not

The principle of Wireless charging

The principle of Wireless charging is actually very simple. The well-known principle of electromagnetic induction as its theoretical basis. That is to say, when the current flows through the coil, it will produce a magnetic field. And close to the magnetic field coil, it will produce a sense current. Thus achieving the current Wireless transmission. For more information, please click here.

The whole process is actually very simple. Just like the transformer. The iron blocks are connected between the two coils, and wireless charging turns the iron block into the air to achieve wireless charging.

In the air, the loss of energy is very large. The solution is to increase the voltage and power to achieve a concentrated transmission of energy to offset the energy in the air lost in the loss.


As we know, it will have a certain impact on our health, with long-term living in the magnetic field of high-voltage electric wires. But how much harm can chargers’ magnetic bring to our lives and health? Previously, CCTV had conducted a small experiment on such issues. They use a high-sensitivity Radiation Survey Meters. It can measure the radiation value of mobile phones and other items. It can also sense the degree of electromagnetic pollution in the surrounding environment. The higher the value, the more severe the radiation.

The wireless charger is measured by the high-sensitivity Radiation Survey Meters. After the power supply is connected, the radiation intensity of the wireless charger is obtained compared to the amount of radiation increased when the power is turned off. After the power was turned on, the value increased to 150 to 180. And the increment was not obvious, but it proved that there was indeed magnetic field radiation.

At the same time, they also measured the magnetic field radiation generated during the use of the mobile phone. Compared to wireless chargers, the radiation of mobile phones is much larger. Some mobile phones have a radiation value of up to 2000 at the instant that the phones are connected, and fewer mobile phones have a value of 427 when they are connected. After the phone was switched on, it gradually dropped to around 200.

The wireless charger’s radiation does not seem to be as large as it seems. But it does not rule out that there are currently some inferior products on the market, which do not meet the relevant regulations and standards and cannot be judged very well. But for the current more general “electromagnetic radiation protection regulations ” the average SAR of the general user at any 6-minute interval within 24 hours of a day should be less than 0.02 W/kg.

Of course, all electromagnetic fields will bring certain magnetic field radiation. The key lies in the strength of the magnetic field and the difference in the magnetic field sensing distance, which brings about the strength of radiation.

The stronger the electromagnetic field will naturally bring stronger magnetic field radiation. At the same time, the energy transmission distance is proportional to the strength of the electromagnetic field. Higher power electromagnetic fields will bring greater magnetic field radiation. When the electromagnetic field radiation reaches a certain level, or people living in a strong magnetic environment for a long time, it will cause some harm to our body.

According to experts, electromagnetic radiation above 2 milligauss can lead to human disease. Human skin and mucous membranes will be harmed first. Symptoms are swollen eyelids, congestion of the eyes, runny nose, throat discomfort, or repeated urticaria on the skin, eczema, itching, etc. When the body’s immune function affected, the vitiligo, psoriasis, allergic purpura, etc. may occur.

Mobile phone wireless chargers do bring some radiation to our bodies, but electromagnetic radiation levels are lower. At the same time, due to daily use, wireless chargers and mobile phones can only work at close distances. The distance is relatively large between wireless chargers and people. So the real harm caused by mobile wireless charging pad is minimal.


In general, wireless chargers for mobile phones are still safe for daily use and can be purchased with ease. 


Thanks: pc online  Trans: Rirob.