Abstract: An alkaline battery including a positive electrode, a negative electrode and an alkaline electrolyte, the positive electrode including a positive electrode material mixture containing a nickel oxyhydroxide, electrolytic manganese dioxide and a graphite conductive material, wherein the nickel oxyhydroxide includes a crystal having manganese dissolved therein and having a ? type structure, and the amount of the manganese contained in the nickel oxyhydroxide is 0.5 to 10 mol % relative to the total amount of nickel and the manganese in the nickel oxyhydroxide.

Abstract: Provided are alkaline storage batteries which are higher in active material utilization as compared with conventional batteries and which can maintain the high utilization even after long-term charge-discharge cycle. Cobalt hydroxide having a BET specific surface area of 20-30 m.sup.2 /g and obtained by neutralization reaction of a cobalt salt solution and an aqueous alkali solution in the presence of a reducing agent is added to a positive electrode active material.