Patent ID: 8736089

Claim:
A host mobile device installed with an electrical energy providing device for electrical energy feeding of the mobile device, the electrical energy providing device comprising: (a) an oscillating member having a base side and a free end, a certain direction being defined by a line connecting centers of said base side and said free end; (b) said base side being fixed to the host mobile device; (c) said free end being free to oscillate relative to said base side in a direction substantially perpendicular to said certain direction, the oscillations being excited by a motion of said host mobile device; and (d) an energy convertor configured to convert mechanical energy of the oscillations of said free end to electrical energy, said energy convertor comprising: (i) a first member attached to said free end; (ii) a second member tightly fixed to said base side; and (iii)said first member and said second member being close such as to be associated by an electromagnetic field, wherein a motion of said mobile device exciting mechanical oscillations of said first member relative to said second member, which in turn inducing a flow of alternate current from said energy convertor, feeding said host mobile device with electrical energy.