Wireless charger market demand：

For wireless charging, we expect, of course, is not bound, charging anytime and anywhere in the free space.

, of course, the ideal is plump, reality is very skinny, compared to now, the technology of wireless charging and charging cable is not the advantage of much more special, in addition to not plug wire increases with the increasing with the convenience of filling, charging speed still can't and the cable quick charge, also cannot satisfy some users demand for charging while using a cell phone.

But now for some users, the wireless charging can have one to play, in some scenarios not frequent use of mobile phones, wireless charging can play it very well.

The technological principle of the wireless charging：

Wireless charging is based on the core principles of electromagnetic induction, the principle is not complicated. Current technology industry there are two main branches, one is a delegate with Qi standard magnetic field sensing technology, the other is a delegate with AirFuel standard magnetic resonance (NMR) technology.

On the principle of magnetic resonance (NMR) is a better solution, it supports further charge distance, and can support multiple devices at the same time to recharge.

Although mri is not mature at present, and through the coil stack, use the Qi standard wireless charger can charge multiple devices at the same time.

However, mri is still the direction for the future development of wireless charging, Qi is the magnetic resonance (NMR) technology into its standard, visible at close range of power transmission is not impossible.

Related to explain: "transmitter coil placed at the bottom (L1), receiving coil is located in the top (L2), the coil is embedded into the different electrical devices. L1 is the wireless charging base of nokia, L2 can be understood as the phone itself. Transmitter coil of alternating current (ac) to generate magnetic field, magnetic field by the voltage of receiving coil. The voltage of equipment is used for charging.

The wireless charging equipment available in the market：

Smartphones currently on the market and consumer wireless charger wireless charging standard is mainly adopted by the Qi, so as long as the phone support Qi wireless charging, then theoretically all use Qi standard wireless charger can compatible (including special finicky iPhone, 7.5 W).

However, different cell phones and wireless charger on the charging efficiency is different, for wireless charger, generally will only list the input and output power, but for the mobile terminal, the received power is the key indexes of the charging efficiency, in general, about 75% of the received power is power output.