Nokia developing self-recharging phone

A new prototype phone from Nokia is able to power and recharge itself with nothing more than ambient radio waves — low-powered TV, radio and mobile phone signals that are kind of the invisible air-soup of modern life.
Though the amount of power harvested by the phone with this method is small, it's able to power the phone in standby mode nearly indefinitely, without ever having to plug it in directly, according to Nokia researchers. The first wireless transfer of power was demonstrated by Nikola Tesla in 1893, though we're relatively sure he wasn't imagining the same kind of dystopian, humans-as-batteries enslaved by our wireless self-powered phones that we are.