Abstract: An inertially activated electrochemical cell has a first and a second electrode and an electrolyte. The electrolyte, or at least an active component thereof, is enclosed in an encapsulant which can be disrupted when a compressive force is applied thereto. When the electrolyte material is encapsulated, the cell is inactive and has a long storage life. When the cell is exposed to a predetermined level of acceleration or deceleration, the encapsulant is subjected to a compressive force causing it to be thereby disrupted freeing the electrolyte material and rendering the cell active.

Abstract: A rotatably shaft is directly supported by at least three wheels, including drive wheel. The circumferential edge of each of the wheels frictionally engages the circumferential edge of the shaft. The shaft is in frictional contact with each of the wheels, and is driven by the drive wheel. Speed step up is achieved because the diameter of the drive wheel is larger than the diameter of the shaft.