Wireless charging is what's going on. As the name suggests, it's not charging. Like WiFi, it's very convenient. Theoretically, it can supply power to mobile phones and other electronic devices anytime and anywhere.

But the wireless charging can not transmit the distance as far as WiFi, now the mature scheme can only achieve wireless charging at the distance of 10mm, and the distance is better than 3~5mm. This kind of wireless charging technology uses magnetic induction wireless charging technology.

With the maturity of the technology, it is expected that in the future 2~3 years, the charging distance of wireless charging can reach about 10~30cm, which can basically meet the free and free charging demand at anytime and anywhere.

To achieve wireless charging, a transmitter and a receiver are needed.

The transmitter is the wireless charger, and the receiver is the mobile phone. There is a coil at the transmitter side, and the receiver also needs a coil. The transmitter transmits energy through the control board and the coil, and the receiver receives energy through the control board and the coil, thus realizing wireless charging.

The wireless charging of the Nokia phone, shown below, can be started on a wireless charger without a USB connection.

As long as there are wireless charger and mobile phone with wireless charging, it can be recharged. The wireless charger can work normally through the Micro USB connection to the ordinary charger or notebook, and put the mobile phone on it to start charging. As shown below, the wireless charger can be recharged through USB.

Why need wireless charging?

Wireless charging has several advantages over traditional wired charging.

1, no line winding, simple and beautiful, looks comfortable, higher quality of life;

2, do not often plug in, that is to charge, convenient and fast, so that your cell phone will never be short of electricity;

3, don't worry about the incompatibility of Samsung and apple connectors. The wireless charger supporting Qi and other standards can charge.

4, there is no risk of electric shock on the charging phone. It completely avoids the security problem and can answer the phone at any time.

5, let the battery work longer life, because that is to charge, so that the battery without power shortage, battery life longer;

6, no need for wired interface, many products can be made totally enclosed waterproof products.