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The electric version of Lockheed Martin's Stalker has a battery that usually lasts just two hours, but in the test, a laser power system wirelessly recharged a drone battery in midair for 24 times as long.
Laser power may work very well for electric drones the size of the Stalker, which has a 10-foot (3 meters) wingspan, but bigger electric aircraft have turned to different solutions for their higher power requirements. A planned trans-Atlantic flight of an electric aircraft will use drones to deliver fresh batteries in midair.
Its not sending electricity up through a laser, its light that gets converted to electron flow (via photovoltaic cell I suppose).