A technique includes providing power to a group fuel cell system components and providing sensors to monitor conditions of the fuel cell system. The status of each sensor is associated with a switch, and the switches are serially coupled together. The delivery of power to the fuel cell system components is regulated in response to states of the switches.

 
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> Carbonaceous material for hydrogen storage and method for preparation thereof, carbonaceous material having hydrogen absorbed therein and method for preparation thereof, cell and fuel cell using carbonaceous material having hydrogen absorbed therein
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