Wireless charging technology originates from wireless power transmission technology, which can be divided into low-power wireless charging and high-power wireless charging.
Low-power wireless charging often uses electromagnetic induction, such as the Qi method for charging mobile phones, but ZTE's wireless charging method for electric vehicles uses an inductive method. High-power wireless charging often uses a resonance-type device that transfers energy from a power supply device to an electricity consuming device. The device uses the received energy to charge the battery and at the same time for its own operation.
Since the charger and the electric device use a magnetic field to transfer energy, there is no wire connection between the two, so both the charger and the electric device can achieve no conductive contacts exposed.

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