A system for use in supplying power to a power storage device. The system uses an acceleration signal indicating the acceleration of the vehicle upon occurrence of a crash to determine whether to trigger a restraint device. A single delivery tube is connected to both of the outlets from the barrels such that, with the pumping mechanism operating, a substantially continuous flow of liquid can be produced from said delivery tube. Depleted dechlorinating material within the perforated region is automatically replaced by dechlorinating material from the material supply region. The free magnetic layer forms the track groove on the side opposite to the pinned magnetic layer.