STORAGE CELL SYSTEM

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An alkaline storage battery comprises a nickel positive electrode having nickel hydroxide as the main positive electrode active material, a hydrogen absorbing alloy negative electrode having a hydrogen absorbing alloy as the negative electrode active material, a separator, an alkaline electrolyte, and an outer can storing the nickel positive electrode, the hydrogen absorbing alloy negative electrode, the separator, and the alkaline electrolyte, and the hydrogen absorbing alloy is expressed by general formula LaxReyMg1-x-yNin-aMa (Re is at least one element selected from rare earth elements including Y, Re is not La, M is at least one element selected from elements other than Co and Mn), and the alkaline electrolyte contains at least one type of compound selected from a tungsten compound, a molybdenum compound, and a niobium compound, and in a system, the alkaline storage battery and a lead battery are connected in parallel.