Most drones, or at least those designed for commercial use, need to be recharged after a 20-minute flight. This new hydrogen-powered drone, could spend up to 2-hours in the sky, and be refueled near instantly upon landing. This particular model was created by the research team at Intelligent Energy, who installed a hydrogen fuel cell, weight just 3.5-pounds (fuel included) onto a DJI Matrice 100 quadcopter.