Pardon the cliche, but is one of the holiest of Holy Grails of wireless power technology. And although at the beginning of lab experiments have been able to transmit electricity to a few feet of power to a light bulb, the day that our laptops and mobile phones can charge without plugging them into a wall socket it seems still decades in the future. Nokia, however, had another baby step in that direction with the invention of a cell phone that is recharged through a unique system: is crops environment radio waves from the air, and the energy is converted into usable energy. Enough, at least, maintain a cell phone runs out of juice.Although the traditional (if there is such a thing) wireless power systems are designed specifically with a transmitter and a receiver in mind, the Nokia system is not finicky about where receives its wireless waves. TV, radio, other mobile phone systems the all this material only bounces off all air and much is wasted, absorbed in the environment or scattered in the ether. Nokia picks up all the pieces and parts of these waves and uses the collected electromagnetic energy to create electric current, which then used to recharge the battery of the phone. A great range of frequencies can be used by the system (no other way, really, as each wave energy is infinitesimal). It is the same idea that Tesla was considering 100 years ago, only on a small scale.Account that harvest ambient electromagnetic energy is never going to provide enough electricity to power your entire House or Office, but that might only be sufficient to keep a live cell phone and kicking.
Currently, Nokia is able to harvest all of 5 milliwatts from the air, the objective is to increase to 20 milliwatts which in the short term and 50 milliwatts per line. It would not be sufficient to keep the phone alive during an active call, but it would be enough to slowly recharge the battery of the mobile phone while it is in standby mode, in theory, offers infinite power always and when you’re not jammed meter deep, where radio waves cannot penetrate. Nokia says it expects to be able to commercialize the technology in three to five years.