NOVELTY - A valve-regulated lead acid battery has a structure containing electrode group obtained by laminating negative electrode plate formed by filling anode collector with negative electrode active material, and positive electrode plate formed by filling positive electrode electrical power collector with positive electrode active material through retainer in battery case filled with electrolyte solution having specific gravity of 1.32, at 25 degrees C.    USE - Valve-regulated lead acid battery. Uses include but are not limited to uninterruptible power system, electric vehicle, motor vehicle, micro hybrid vehicle, electric power generation system, golf cart and idling stop system vehicle.    ADVANTAGE - The valve-regulated lead acid battery is environmentally-friendly, and has excellent durability. The motor vehicle provided with the valve-regulated lead acid battery has suppressed the discharge amount of carbon dioxide gas in the exhaust.    DETAILED DESCRIPTION - A valve-regulated lead acid battery has a structure containing electrode group obtained by laminating negative electrode plate formed by filling anode collector with negative electrode active material, and positive electrode plate formed by filling positive electrode electrical power collector with positive electrode active material through retainer, in battery case filled with electrolyte solution having specific gravity of 1.32, at 25 degrees C. In the electrolyte solution, negative electrode veneer plate having area of 108 cm2, of the negative electrode plate is correctly aligned to positive electrode veneer plate having area of 108 cm2, of the positive electrode plate. An electrochemical measurement system formed by installing a reference electrode as an electric potential reference between the negative electrode veneer plate and the positive electrode veneer plate, is charged with the charge voltage of 2.33 V, with respect to the valve-regulated lead acid battery containing negative electrode veneer plate and the positive electrode veneer plate. A current potential curve is obtained by plotting relationship between the negative electrode charge overvoltage and positive electrode charge overvoltage which are applied at the 5th second of charge start time, based on the charging current of negative electrode and positive electrode. In the area of the current potential curve which makes an origin the point which the absolute value of charge overvoltage changes increases from 0, and is obtained from the origin by resembling straight line. The ratio of negative electrode charge overvoltage (in mV) and charging current (in ampere) of negative electrode is 10.4 or less. The ratio of positive electrode charge overvoltage (in mV) and charging current (in ampere) of positive electrode is 19.6 or less.