Wireless mobile power supply refers to equipment and devices with built-in batteries that obtain power through wireless induction for charging. Wireless charging technology, derived from wireless power transmission technology, its working principle is the use of induction cooker principle, when the current through the coil, it will produce a magnetic field; And the generated magnetic field will form a voltage, after the voltage will produce a current, with the current can be charged, and now this technology has been used in the Sandforce brand wireless mobile power supply.