Patent ID: 7638216

Claim:
An apparatus, comprising; a housing comprising at least one wall, the wall having an inner surface and an outer surface, and defining at least one aperture extending from the inner surface to the outer surface, and the inner surface further defining a volume; at least one electrode disposed within the volume, and a water-controlling separator disposed in the volume between the inner surface of the housing and the electrode, wherein the water-controlling separator is capable of blocking a flow of liquid from the electrode though the one or more apertures to the ambient environment while allowing oxidant to flow from the ambient environment though the one or more apertures to the electrode; wherein the electrode is one of a plurality of electrodes, and at least a region is defined by the housing inner surface and a surface of an adjacent one of the plurality of electrodes, and further a second region is defined by an opposite inner surface of the housing and a surface of an adjacent one of the plurality of electrodes; and wherein the plurality of electrodes comprises a first electrode, a second electrode and a third electrode; and wherein the third electrode is a supercapacitor electrode.