| 摘要 |
Power-generating elements (a positive electrode 2, a negative electrode 3, and a separator 4) are included in a cylindrical battery case 1 with a base, and a raised portion at the center of a bottom surface of the battery case 1 forms a positive electrode terminal 30. The maximum outer diameter L (mm) of a battery 10 and the radius r (mm) of an arc of a shoulder portion 20 close to the positive electrode terminal 30 of the battery case 1 satisfy the following relationships: 14.20 mm≦̸L≦̸14.35 mm, and r≧L−13.9 mm.
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