NOVELTY - Lead storage battery has electrode plate group (4) including positive plate (1), and negative plate (2) formed by filling negative electrode collector with negative electrode active material, which is accommodated through separator (3) in battery case (5). Coarsening of negative electrode active material is suppressed by adding carbonaceous conductive material and organic compound, to negative electrode active substance, during charging/discharging process. Total surface area of positive electrode active substance per unit volume of electrode plate group is 3.5-15.6 m2/cm3.    USE - Lead storage battery is used for motor vehicles. Uses include but are not limited to power supply source for industrial apparatus, electric vehicles e.g. golf cart, microhybrid vehicles e.g. international space station vehicle, and electric power generation trailer.    ADVANTAGE - The lead storage battery has improved charge acceptance property and durability under partial state of charge condition. The motor vehicle using the lead storage battery has improved fuel consumption with reduced emission of carbon dioxide gas. Thus, global warming is suppressed.    DETAILED DESCRIPTION - Lead storage battery has electrode plate group including positive plate formed by filling positive electrode collector with positive electrode active material, and negative plate formed by filling negative electrode collector with negative electrode active material, which is accommodated through separator in battery case with electrolyte solution. Coarsening of negative electrode active material is suppressed by adding carbonaceous conductive material and organic compound, to negative electrode active substance, during charging/discharging process. Total surface area of positive electrode active substance per unit volume of electrode plate group is 3.5-15.6 m2/cm3. Battery is charged intermittently, and has high-rate discharge to load in partially charged state.    DESCRIPTION OF DRAWING(S) - The drawing shows a longitudinal cross-sectional view of the lead storage battery.    Positive plate (1)    Negative plate (2)    Separator (3)    Electrode plate group (4)    Battery case (5)