NOVELTY - The fuel cell (10) has two fuel cell stacks (12a, 12b) that are connected in series. Each fuel cell stack includes a cell (14) comprising an anode area and a cathode area. A hydrogen transport system comprises supply systems (16a, 16b) for supply hydrogen or hydrogen containing gas mixture to the anode areas of the cells. Discharging systems (18a, 18b) discharge anode exhaust gas from the anode areas of the cells. The discharging systems of the fuel cell stack that is upstream in hydrogen flow direction is connected with the supply systems of the downstream fuel cell stack.    USE - Fuel cell for supplying electricity to an electrical drive motor of a motor vehicle, a low-voltage on-board power supply system and/or an electrical auxiliary consumer (all claimed).    ADVANTAGE - The anode exhaust gas is supplied as operating gas to the downstream connected fuel cell stack, such that nitrogen is accumulated in the anode areas of the cells in the downstream fuel cell stack, while the upstream fuel cell stack is anode-laterally nitrogen-free, thus loading the upstream fuel cell stack with larger electrical power than that off the downstream fuel cell stack, and hence optimizing performance of the fuel cell stacks. The discharge of the anode exhaust gas from the last cell in the stack is avoided, since the accumulation of the nitrogen on last cell on the anode side results in back diffusion in the cathode area, thus simplifying construction and control of the fuel cell. The fuel cell avoids need for usage of a recirculation system for recirculating of hydrogen containing anode exhaust gas into the upstream fuel cell stack, thus reducing fuel consumption of the fuel cell.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for operating a fuel cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a fuel cell.    Fuel cell (10)    Fuel cell stacks (12a, 12b)    Cell (14)    Supply systems (16a, 16b)    Discharging systems (18a, 18b)