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The US Army is taking wireless recharging to new heights, by using lasers to power small drones in mid-air.
Small flying vehicles with several rotating blades, known as multicopters or drones, have proven valuable to the military for intelligence gathering. But they are incredibly power-hungry, meaning their flying time is limited to half an hour or less.
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Now the US Army’s Communications-Electronics Research, Development and Engineering Center based in Maryland are developing a power beaming system with a combination of modern lasers and efficient photovoltaic …