NOVELTY - The battery (12) has a dye-sensitized solar cell (16) provided with a solar cell electrolyte solution (24), which is contacted to a solar cell negative electrode (20) and a solar cell positive electrode (22). A lithium ion storage battery (18) is provided with a storage battery electrolyte solution (30), which is contacted to a storage battery negative electrode (26) and a storage battery positive electrode (28). The solar cell positive electrode is joined to the storage battery positive electrode, where Schottky barrier is formed between the solar cell and storage battery positive electrodes.    USE - Optical storage battery.    ADVANTAGE - The battery utilizes a small sized electron as a mobile body by carrying out Schottky junction formation between the solar cell positive electrode and the storage battery positive electrode, so that the solar cell and the storage battery can be integrated, the mobile body can be moved to a solar cell electrolyte solution side from a storage battery electrolyte solution side without an ion-exchange membrane, a closed circuit can be formed between the solar cell negative electrode and the storage battery negative electrode, thus reducing movement resistance of the mobile body, and improving efficiency of electric power generation of the battery and charging/discharging capacity of the battery effectively.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an optical storage battery system.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic circuit diagram of an optical storage battery system in an electric power generation mode.'(Drawing includes non-English language text)'    Optical storage battery (12)    Dye-sensitized solar cell (16)    Lithium ion storage battery (18)    Solar cell negative electrode (20)    Solar cell positive electrode (22)    Solar cell electrolyte solution (24)    Storage battery negative electrode (26)    Storage battery positive electrode (28)    Storage battery electrolyte solution (30)