This paper presents a review on the latest developments in power storage composites. During the last decade, the need for multifunctional materials has grown steadily and has become a major priority as the demand for weight and, consequently, fuel consumption reduction, in ground and aerial vehicles, became critical. Accordingly, attempts have been made to develop structural materials that could incorporate specific devices, which would perform as sensors, for structural health monitoring, as actuators, for structural morphing capabilities, or as power harvesters, for supplementing existing power sources. Attempts have also been made to develop power storage composites, by embedding fuel cells, thin film lithium batteries, or capacitors in their structures. While it has been proven that these technologies are viable, the resulting structural materials exhibit significantly lower structural properties. To date, the most promising approach in power storage composites seems to be the development of structural load carrying capacitors. Such composites have the potential to provide good structural and electrical characteristics and can be easily manufactured.