This SBIR Phase I project will entail critical research to enable meso-scale fuel cells being developed at the University of Illnois Urbana Champaign(UIUC) and Renew Power Incorporated (RPI) to be used in military meso sensor packages. Our existing prototype pumpless, room temperature, meso-scale fuel cells already generate enough net average power, but not enough peak power to meet the goals in the request for proposals (RFP). We believe that with modification, our existing devices can meet all of the size and power goals outlined in the RFP and have a lifetime 5 times longer than batteries.