“Unmanned aerial vehicles (UAVs) are currently being considered for many applications, although one factor that a lot of people tend to gloss over is the aircrafts’ limited battery range – being able to stay airborne for only 10 to 30 minutes at a time definitely limits their usefulness. Researchers at MIT, however, are developing a possible solution. They’re working on a fixed-wing UAV that can perch on power lines and use their emitted magnetic fields to recharge its battery, before continuing on its way.”
Source: www.gizmag.com