Micro electro mechanical systems (MEMS) and technologies aimed at generating, converting or storing power are gaining tremendous importance as they aim to replace batteries used for powering miniature devices. As nanodevices start to become a reality and microdevices become increasingly complex, the need for compact power sources with high energy and power density is critical. Researchers are making great strides in the area of Power MEMS. Baverstam provides an overview of this exciting new area of research in this newsletter and provides a selection of recent milestones in power MEMS including nanobatteries, micro fuel cells, miniature chemical batteries, microthrusters and piezoelectric microcells.