Membrane electrets composed of mixtures of polyelectrolyte salts and hydrogen bonding materials have been studied to determine their electric charge and electrical energy-storage characteristics. It has been found that membranes containing salts of polystyrenesulfonic acid, plus polyvinyl alcohol, show excellent promise for such electrical storage purposes. The electrets are formed by heating the membrane to above its glass-transition temperature (typically 60–90 °C), placing it in an electric field (in our case, by use of a 22.5 V dry cell battery) and cooling the membrane back to room temperature within the field. It is found that the membrane, typically 0.005–0.010 cm thick, will retain a potential difference of about 2.5 V. These membranes differ from the usual electrets in that they are not really dielectrics. Whereas typical dielectric electrets might have conductivities of the order of 10 14 (Ω-cm) −1, the polyelectrolyte electrets have conductivities of the order of 10 −9 (Ω-cm) −1 or even higher. The charge is stored by orientation of dipoles within divergence elements, probably of a semi-crystalline nature, scattered throughout the membrane. The charge storage is stable and, if the membrane is stored with the faces shorted, will last indefinitely. The electret can be discharged by connecting the two faces to an external circuit and heating the membrane to above the charging temperature. Alternatively, electrets can be discharged by use of ultraviolet light, though we have not attempted this method as yet. Using thermal discharge, we have measured charge storage capacities of the order of 1 C/g. Using our present system, we foresee no difficulty in increasing charge storage capacity by an order of magnitude or more, thus making the system comparable to lead-acid or mercury storage batteries.