NOVELTY - A lead storage battery has a structure with a electrode group in which a negative electrode plate (A) formed by filling a negative electrode collector (A1) with a negative electrode active material (A2), and a positive electrode plate (B) formed by filling a positive electrode collector (B1) with a positive electrode active material (B2) having specific surface area of 6 m2/g or more, are laminated through separator, in battery case with electrolyte solution. At least, carbonaceous electroconductive material and organic compound, are added to active material (A2).    USE - Lead storage battery is used for motor vehicles. Uses include but are not limited to power supply for industrial apparatus, motive power source for electric vehicle, golf cart, international space station (ISS) vehicle, and microhybrid vehicles e.g. electric power generation trailer with controller.    ADVANTAGE - The lead storage battery has improved durability and charge acceptance property, and suppresses coarsening of negative electrode active material during charging/discharging. Liquid-type lead storage battery is charged intermittently and performs high-rate discharge to a load under a partially charged state.    DETAILED DESCRIPTION - A lead storage battery has structure including electrode group in which negative electrode plate and positive electrode plate are laminated through separator, in battery case with electrolyte solution. The negative electrode plate is formed by filling negative electrode collector with negative electrode active material. The positive electrode plate is formed by filling positive electrode collector with positive electrode active material. At least, carbonaceous electroconductive material and organic compound are added to the negative electrode active material. The positive electrode active material has specific surface area of 6 m2/g or more. The organic compound suppresses coarsening of negative electrode active material during charging/discharging.    DESCRIPTION OF DRAWING(S) - The drawing shows a graph illustrating relationship between electric potential of charging current (14 V) and open-circuit voltage of lead storage battery used for motor vehicle. (Drawing includes non-English language text)