The push for smaller electromechanical devices has led to the development of microscale combustion to provide portable power sources through hydrogen and hydrocarbon fuel combustion. Microscale combustion offers high energy density to power micro unmanned aerial vehicles, satellites, and sensors. These combustion-based micropower generators can be manufactured using microelectromechanical systems at low cost and mass produced. This seminar will focus on technological challenges in microscale combustion and review systems under development, including methods to improve hydrogen combustor performance.