NOVELTY - A photogalvanic cell comprises: a first electrode and a second electrode spaced apart from the first electrode; an aqueous medium arranged between the first and second electrodes and including a lyotropic liquid crystal existing in a structured phase such that the aqueous medium includes at least one surfactant pseudo-phase and at least one aqueous sub-phase; a photoactive first redox couple contained in the surfactant pseudo-phase and a second redox couple contained in the aqueous sub-phase; at least one electrolyte contained in the aqueous sub-phase.    USE - Photogalvanic cell used in an electric charge storing device, and a power source for an item of personal electronic equipment (all claimed).    ADVANTAGE - The photogalvanic cell is flexible (non-rigid), lightweight, self-assembling, and self-reconstructing.    DETAILED DESCRIPTION - A photogalvanic cell comprises: a first electrode and a second electrode spaced apart from the first electrode; an aqueous medium arranged between the first and second electrodes and including a lyotropic liquid crystal existing in a structured phase such that the aqueous medium includes at least one surfactant pseudo-phase and at least one aqueous sub-phase; a photoactive first redox couple contained in the surfactant pseudo-phase and a second redox couple contained in the aqueous sub-phase; at least one electrolyte contained in the aqueous sub-phase and, optionally, at least one electrolyte contained in the surfactant pseudo-phase. An INDEPENDENT CLAIM is included for an assembly for incorporation into a photogalvanic cell, comprising a first fluid medium and a second fluid medium, the fluid media being separated at a boundary, the first fluid medium including a first redox couple consisting of species soluble in the first fluid medium and substantially insoluble in the second fluid medium and the second fluid medium including a second redox couple and where a component of the first redox couple is transformable on exposure to light into a species which can partition between the first and second fluid media by crossing the boundary.