Drones are recently receiving a growing attention in both civil and military sectors. Despite
their good features such as high maneuverability, wide variety of usage, and low cost;
battery-powered drones are still limited in terms of endurance. They cannot perform long
flights and persistent missions. This paper proposes then a review-based discussion of the
solutions addressing this issue, including swapping laser-beam inflight recharging and
tethering. Hybrid power supply system is also a solution of choice. Combining battery with …