Patent ID: 7771872

Claim:
An alkaline battery comprising a negative electrode active material, a positive electrode active material, an alkaline electrolyte, a separator and a can body, which alkaline battery uses an alloy composed mainly of Zn as the negative electrode active material, an aqueous solution of NaOH, KOH or a mixture thereof as the electrolyte, and a silver oxide as the positive electrode active material, wherein the silver oxide powder is one whose crystallite size calculated from a half value breadth of the (111) plane peak by powder X-ray diffraction is greater than 250 Angstrom and equal to or less than 1000 Angstrom and whose total content of nitrate ions and sulfate ions is 0.01% or less, and that when a 5 g of its sample is soaked in 50 cc of 50° C. KOH 40% aqueous solution for 24 hours, it experiences dissolution of Ag into the solution of 40 mg/L or less.