| 摘要 |
The opening portion of a battery case is sealed with a sealing plate using a gasket. The potential of electrolytic manganese dioxide in a positive electrode active material is in the range from 275 to 320 mV. The volume of a closed space formed between the gasket and positive and negative electrodes in the battery case is in the range from 2.0 to 6.0% of the volume inside the battery formed by the battery case and the sealing plate.
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