| 摘要 |
In the present invention, there is provided a battery pack including a circuit board disposed on the inner side of a mount surface to be mounted to a battery mounting portion, and a terminal portion at one surface adjacent to the mount surface, the battery pack being mounted into the battery mounting portion by sliding the mount surface on the battery mounting portion, wherein a recess is formed at one or each of a pair of edge portions which are formed between the mount surface and both side surfaces adjacent to the mount surface through a pair of side edges parallel to the direction of sliding of the mount surface in the battery mounting portion, according to the kind of the battery pack.
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