We all know that drone flight time is limited because of battery life. A team of scientists were not happy with this and asked themselves why not swap drone batteries in the air. The solution proposed by researchers is to bring the replacement battery to the drone by fitting it with rotors so it can fly. Sure, you will need fancy footwork when exchanging swappable drone batteries in the air. However, if we can land spacecraft on asteroids, surely we can make that happen too.