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The FE DMFC has several other advantages over the PEM DMFC. The most important is superior startup and shutdown performance. When the FE DMFC is shut down the electrolyte is drained from the cell thereby shutting down the fuel cell with no residual voltages. The PEM DMFC shuts down with high voltages present causing degradation of expensive catalysts and other components. The FE DMFC also shows much more constant voltage over its output range than the PEM DMFC, which experiences voltage drop at high output.