Nokia Batteries Could Shake Up the Competition
Nokia has filed a patent for a phone that would recharge itself if the user simply shakes it. The mobile phone maker is applying for a patent to make phones that use electrical energy generated by piezoelectric elements (the shaking), received by a power controller and applied to the battery.
According to the patent application, the radio transmitter circuit and battery will be supported on a sturdy frame which will move up and down as well as from side to side. The frame will move along two sets of rails: One will allow it to travel up and down, the other side to side. At the end of each rail, there will be piezoelectric crystals, which, when compressed by the frame, will generate a current. Everyday motions of a cell phone user -- walking, jogging, etc. -- will create electricity, thereby charging a capacitor which charges the battery.
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