Conveniently, wireless charging is also safer, with no exposed connectors, so leaks, power outages, and other safety hazards are completely avoided. Some people worry about the problem of radiation, this technology was first used in water purifiers, so far there have been 8 years, the safety has been verified by 36 countries, certainly not harmful to the human body and the environment. It is said that wireless charging roughly delivers energy through a magnetic field, while humans and the vast majority of objects around them are non-magnetic. Wireless charging also has the advantage of saving power, wireless charging equipment, the efficiency of receiving about 70%, and wired charging equipment, but it has a full automatic shutdown function, to avoid unnecessary energy consumption. Moreover, this efficiency rate is constantly improving and will soon reach 98%. Wireless charging equipment than ordinary chargers "smart" a lot of different electronic products, the power interface can automatically correspond to the need to charge, the transmitter and receiver chip will automatically start working at the same time, full of electricity, the two sides will automatically shut down. It can also automatically recognize different devices and energy needs for 'personalized work', which is intelligence. Now, for the safety of consumers as well as their convenience considerations, the relevant researchers are first offering near-field wireless charging technology (i.e., it needs to be placed next to the transmitter), and at the same time, they are also working on long-distance wireless charging, which is going to be an emerging market. In fact, the current technology can reach a range of 3 feet to 4 feet for effective power transmission, but this still needs to be verified by the relevant organizations. It is believed that in the next 5 to 10 years, or even faster, long-distance wireless charging will enter everyone's future, not only small power appliances, common household electrical equipment, medical equipment, power tools, office appliances, kitchen appliances and so on can realize wireless charging. In fact, to be more accurate, it should be called "wireless power supply", that is, the transmission of electricity while using, without the need for any battery-like power storage devices, not to mention the need to charge in advance. At that time, wires, plug boards, batteries can be disappeared, you can not even feel the existence of electricity, it is like the air, let you feel like hand to hand.