Qi (inductive power standard)



Qi (pronounced CHEE; IPA: /tʃiː/, coming from the Chinese word meaning "natural energy") is an interface standard developed by the Wireless Power Consortium for inductive electrical power transfer over distances of up to 4 cm (1.6 inches). The Qi system comprises a power transmission pad and a compatible receiver in a portable device. To use the system, the mobile device is placed on top of the power transmission pad, which charges it via resonant inductive coupling.