Abstract: An apparatus and a method are provided for obtaining electrical power from activities, e.g., walking and running, of a user. In one example, the apparatus includes first and second compressible bladders; a fluid containing column coupled between the first and second compressible bladders; a magnetic piston disposed in the fluid containing column, the magnetic piston being shaped to conform with an internal cross section of the cylinder and movable in the cylinder along a longitudinal direction of the cylinder, wherein the magnetic piston comprises a plurality of magnets with similar poles facing each other and separated by one or more pole pieces, the magnets being axially magnetized along the longitudinal direction; one or more wire windings disposed proximate the magnetic piston; and an electric charge storage electrically coupled to said one or more wire windings.