Battery life always limits a drone’s ability to perform tasks and get anywhere. So why not let it slurp from nearby power lines? (Well, there are reasons.) Researchers at the University of Southern Denmark attached a gripper system to a Tarot 650 Sport drone, which they customized with an electric quadcopter propulsion system and an autopilot module. An inductive charger pulls current from the power line, enabling it to recharge five times over two hours during tests. The benefit here is that... Read this story