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A microbial fuel cell with a microfabricated electrode and exoelectrogenic bacteria has been demonstrated. The superior compatibility of the organism's microbiology makes this approach more attractive and practical over previously micromachined microbial fuel cell designs. Both electrical performance and longevity of the device are greatly improved with continuous power output for over a week and enhanced performance over time. Using a 1 mm2 anode, the fuel cell reaches and maintains 619 mV of open circuit voltage and delivers 0.12 muW maximum power using potassium ferricyanide at the cathode after 10 days of operation.