Wireless Charging: Understanding the Technology and Its Safety


Wireless charging technology has been increasingly applied to various devices, from smartphones to electric vehicles, in recent years. As this technology becomes more widespread, questions and concerns have arisen, such as “What exactly is wireless charging?” and “Is it safe for human health?” In this article, we’ll provide a detailed explanation of how wireless charging works and address its safety aspects.


The Basics of Wireless Charging

Wireless charging, also known as wireless power transfer, is a technology that allows the transmission of electrical power without the use of wires. The main methods include electromagnetic induction, magnetic resonance, and radio frequency transmission. Electromagnetic induction is used in devices like electric toothbrushes and some smartphones for charging. On the other hand, magnetic resonance is suitable for applications such as charging electric vehicles, as it can efficiently transmit power over longer distances.

Effects on Human Health

Numerous studies have been conducted on the safety of wireless charging, and it is generally accepted that low-frequency electromagnetic fields, when properly managed, pose minimal risk to human health. The World Health Organization (WHO) and the International Agency for Research on Cancer (IARC) have classified low-frequency electromagnetic fields as “possibly carcinogenic,” but this is a highly conservative classification, and no clear evidence of harm has been found.

Precautions for Use

While wireless charging technology is convenient, it is important to use it properly. In particular, users should be cautious not to place metal objects between the charging pad and the receiving device. Metal can reflect or absorb electromagnetic waves, potentially causing localized high temperatures. Additionally, when using wireless charging devices, it is crucial to follow the manufacturer’s instructions for correct and safe usage.


Wireless charging technology holds great potential to make our lives more convenient and comfortable. Based on current scientific research, the impact on human health appears to be very limited. However, as the technology evolves, ongoing research on safety aspects is necessary. When incorporating this technology into our daily lives, it is important to have proper knowledge and use it correctly and safely.