| 摘要 |
An alkaline battery includes a positive electrode case, a positive electrode material mixture including a hollow portion and contacting the inner side of the positive electrode case, a gelled negative electrode disposed in the hollow portion of the positive electrode material mixture, a separator disposed between the positive electrode material mixture and the gelled negative electrode, a resin sealing body for sealing the opening of the positive electrode case, and an alkaline electrolyte. The positive electrode material mixture includes manganese dioxide and nickel oxyhydroxide in a weight ratio of 20:80 to 80:20 as a positive electrode active material. The packing density of the positive electrode active material in the space encircled by the positive electrode case, the separator, and the sealing body is 2.65 to 3.00 g/cm<SUP>3</SUP>.
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