| 摘要 |
A secondary battery. A secondary battery includes an electrode assembly; a can containing the electrode assembly and including a plate, a wall extending from the plate in a first direction to a first end and defining a first cavity having a first opening opposite the plate, and a first extension wall extending from the first end in the first direction to a second end, the first extension wall defining a second cavity having a second opening opposite the plate; and a cap assembly comprising a cap plate and sealing the first cavity at the first opening.
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