Why hasn't wireless charging become popular?

Since the beginning of this year, with the successive revelations of various black technologies of the iPhone, the "wireless charging" technology has attracted the attention of all sectors of society. In fact, this black technology was pushed to the forefront of the technological trend when it was first introduced. After a period of experience, many users were greatly disappointed with this technology because it could not provide a better charging experience.

In fact, wireless charging is no more convenient than wired charging because most wireless charging requires additional equipment. That is to say, a receiver still needs to be plugged into the phone. What is worth noting is that currently, there are three types of wireless charging on the market.

Magnetic induction wireless charging

As the current situation shows, the most common wireless charging technology on the market is magnetic induction wireless charging. The magnetic induction principle corresponds to the theory of electromagnetism and has a history of more than 100 years. As early as 2009, the Palm Pre mobile phone began to adopt magnetic induction wireless charging technology. It is known that Palm Company was once glorious in the PDA field, but with the continuous rise of other smartphone brands, it gradually declined. Even so, the technological breakthrough made by Palm on this phone still made people amazed. Although it is a wireless charging technology, it still cannot escape the constraints of other accessories. It is reported that the Palm Pre needs to be paired with a wireless charger called "Touchstone" to achieve wireless charging.

After that, other mobile phone brands also followed the trend and launched similar charging technologies. Such as Nokia Lumia 920, Samsung S8, etc. Besides the inconvenience of needing accessories, this charging technology also has a major problem - slow charging speed. Some users have reported that a mobile phone with a battery capacity of about 3000mAh can be fully charged by wired fast charging technology in about an hour and a half, while using the latest wireless charger, it takes more than three hours to charge. This is another major reason why wireless charging has not become popular. 

Magnetic Resonance Wireless Charging

Essentially, the resonant wireless charging technology still relies on magnetic induction technology. However, compared to the magnetic induction wireless charging technology mentioned earlier, the coils of the wireless charger in this technology have better coupling. Moreover, the power of magnetic resonance wireless charging technology is greater and the charging distance is farther. When a mobile phone is charging, there is greater freedom in its placement, and multiple mobile phones can be charged simultaneously.

What is worth noting is that the power required by the charging base for magnetic resonance wireless charging is much greater than the coils inside the mobile phone. Therefore, in general, the base of such wireless charging devices is usually quite large. Due to the higher power and longer transmission distance, this base can be hidden under the table. The mobile phone can be charged wirelessly, that is, as long as it is placed on the table, it can be charged.

Recently, a company named WF-Charge has developed a new wireless charging device. The biggest advancement of this device compared to the current wireless charging devices on the market is that it can support charging mobile phones and tablets within a range of 10 meters, without the need for the phone to check the charger or come into contact with the device. This is very likely to adopt magnetic resonance wireless charging technology. 

Electromagnetic wave wireless charging

When comparing the above two types of wireless charging technologies, electromagnetic wave wireless charging technology is the one that best aligns with people's imagination of black technology. Its working principle is to receive energy in the same way as receiving wireless signals, and then charge the phone. In fact, to achieve electromagnetic wave charging, the power requirement for the transmitting device is extremely high. This is because to solve the problem of energy dispersion over long distances, of course, it is still uncertain whether this high-power electromagnetic wave will cause harm to the human body. 

In conclusion, the current wireless charging technology still has many shortcomings. As for whether the wireless charging technology will achieve a technological breakthrough in the future, or whether it will be widely applied in the future, let's wait and see together!