NOVELTY - The battery has an organic-solvent-type storage battery provided with single cell or multiple cells. Overcharge voltage of the organic-solvent type storage battery is higher than hydrolyzing voltage of a water-system storage battery and hydrolyzing voltage of another water-system storage battery. Average discharge voltage of the latter water-system storage battery is higher than average discharge voltage of the solvent type storage battery. Average discharge voltage of the organic-solvent type storage battery is higher than average discharge voltage of the former water-system storage battery.    USE - Hybrid storage battery for use in a hybrid electrical storage apparatus of an electricity generation and condensing unit of a power grid system and a traveling body (all claimed) i.e. motor vehicle.    ADVANTAGE - The lifetime performance and reliance performance of the battery is improved. The overcharge energy is safely discharged-out of a system as heat by gas-absorption reaction, so that the water-system battery can discharge energy at time of low temperature and outstanding low temperature characteristic can be acquired. The load leveling function is performed to store cheap electric power at nighttime, so that the electric power can be utilized at daytime and power failure. The acceptance performance of regenerated electric power of the battery is improved, so that drive of AC dynamo can be decreased with an engine and fuel consumption of the motor vehicle can be improved significantly. The battery is inexpensive.    DETAILED DESCRIPTION - The water-system storage batteries are a lead acid battery LRU (11) and a nickel hydride storage battery LRU (12). The organic-solvent-type storage battery is a lithium ion storage battery LRU (13). An INDEPENDENT CLAIM is also included for a power grid system.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a virtual battery provided with a hybrid storage battery.    Virtual battery (2)    Lead acid battery LRU (11)    Nickel hydride storage battery LRU (12)    Lithium ion storage battery LRU (13)    Nickel hydride storage battery single cell (22)