ALKALINE DRY CELL

摘要

Provided is an alkaline dry battery allowing suppression of polarization in pulse discharge under heavy load to improve discharge characteristics, and having high reliability in safety in case of short circuit. In the positive electrode, a calcium compound having a content of iron element of 150 ppm or less is added in an amount of 0.1 to 10 mol% with respect to a positive electrode active material, a nickel oxyhydroxide powder having 2.95 or more of an average nickel valence and 8 to 18 µm of an average particle diameter is used, the weight ratio of the nickel oxyhydroxide powder and a manganese dioxide powder is in the range of 20 : 80 to 90 : 10. A zinc or zinc alloy powder used as negative electrode active material includes a first powder having a particle diameter more than 75 µm and 425 µm or less, and a second powder having a particle diameter more than 5 µm and 75 µm or less, and the weight ratio of the first powder and the second powder is in the range of 65 : 35 to 75 : 25, and the concentration of a potassium hydroxide solution is 33 to 35% by weight.