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This presentation includes results of fuel cell research activities sponsored by the US Army for the last several years. It outlines current efforts and future plans. Fuel cells promise significant advantages in terms of weight, coupled with cost and/or logistics benefits. Military applications for fuel cells vary. Missions analyzed to date range from small man portable units of the 1-500 Watts and 180 - 12,000 Watt-Hrs to mobile auxiliary power units (APUs) in the 0.5 - 10 kW power range. Military power source must be robust and capable of powering equipment under all environmental conditions. Fuel cell power sources have been demonstrated for several Military applications and are being investigated as a possible power source for the Soldier System, Robotics, Sensors and APUs. Much of the Army's efforts to date have focused on small battery replacement and hybrid fuel cell/battery systems.