The big black squares you see in these images below are a new wireless charging system that has been developed by the Korea Advanced Institute of Science and Technology known as KAIST. The wireless charging device is different from many of the others already on the market in that it has the ability to charge multiple devices at the same time, but that isn’t the only cool thing this new wireless charging system can do.
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https://www.slashgear.com/kaist-wireless-charging-system-can-charge-multiple-devices-at-once-10392453/