A fuel cell system for powering a work load includes a fuel cell stack and a shunt regulator having a threshold detection; transistorized power switching element, and a dump load. The slats are moveable by a control wheel 28 from a closed condition, in which air flow through the outlet 13 is impeded, to an open condition allowing air flow through the outlet 13, the control wheel 28 also operating the valve 15 to permit the flow of air prior to opening the slats, the air flow passing through slots 22 in at least some of the slats. The associated message reference points to the shared memory location. The injury dressings are disposed vertically between the backing plate and the front compartment surface, such that the tension member urges the injury dressings forwardly against the interior side of the front surface. The detection engine controls whether a user is able to access any of the functionality provided by the computing device based upon whether the PDK is in communication with the reader or not. Water is allowed to migrate from the chewy material to the candy material.