The leading tech company Xiaomi on Friday announced the Mi Air Charge. This is designed to let users remotely charge their electronic devices including smartphones without any cables, pads, or wireless charging stands. 

This is based on the widely adopted Qi standard in which the power transfers wirelessly using inductive charging over a distance of up to four centimetres. Xiaomi's Mi Air Charge is claimed to charge multiple devices within a radius of several metres and even with physical obstacles. Despite the company's announcement, the technology will not become generally available in the near future and remains in a concept phase.
The china based company has developed an in-house isolated charging pile with a phase control array that consists of 144 antennas transmitting millimetre-wide waves. These waves go directly to the smartphone that requires charging through beamforming.

Earlier In April last year, Oppo released a teaser showing an over the air wireless charging concept that it called FreeVOOC. It released a video that highlighted the new charging experience on the Oppo Reno Ace Infinity smartphone. However, it didn't receive an official launch.

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