Conventionally, there is an idea to eliminate battery shortage by converting mechanical energy obtained by vibration caused while a user of a mobile telephone is moving, into electric energy. However, a generator having an oscillator cannot be said to have a high generation efficiency. In order to solve this problem, there is provided a mobile telephone including a generator consisting of a rotary weight unit having an electromotive induction coil capable of rotating around a circular orbit, and a magnetic field formation unit for forming spatially uneven magnetic field on the circular orbit. Thus, the mobile telephone has a generator which can generate electricity much more effectively than a mobile telephone having the oscillator.
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