| 摘要 |
A battery 1 has a wound body 4 accommodated in a cylindrical battery case 2. The wound body 4 includes an electrode group 6 wound around a core 10. The electrode group 6 includes a negative electrode plate 20, a positive electrode plate 30, and a separator 40. The core 10 is made of a flexible linear conductor, and functions as a negative electrode lead.
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