Charging system for a rechargable power source

There is provided a power source system which includes a self-charging system. In one embodiment, the power source system is used to power portable devices and may include a power source such as a set of rechargeable batteries or a battery pack. The power source system comprises a self-charging system which includes an energy harvester operatively connected to a vibrational energy source such as a plurality of piezoelectric elements (piezos). The piezos preferably include a plurality of cantilevers which are composed of a piezoelectric material which may be the same or may be different from the substrate material of the piezos.