Alkaline rechargeable battery

An alkaline rechargeable battery (2) comprises an electrode assembly (22) formed of a positive electrode (24) and a negative electrode (26) stacked with a separator (28) interposed between and an alkaline electrolyte, wherein the positive electrode (24) holds a positive electrode mixture containing positive-electrode active material particles (36), each comprising of a base particle (38) formed primarily of nickel hydroxide, coated with a conducive layer (40) of a Co compound containing Li, and a positive-electrode additive (50) containing aluminum hydroxide, distributed between the positive-electrode active material particles, where the amount U of the positive-electrode additive (in parts by weight) relative to 100 parts by weight of the positive-electrode active material particles satisfies 0.01¤U