| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of preventing light from a light-emitting element from leaking from an opening of an outer case to the outside.SOLUTION: The battery pack disclosed in the present specification comprises: a display unit including one or a plurality of display windows; an outer case including an opening; a battery cell housed in the outer case; a substrate housed in the outer case and mounted with one or a plurality of light-emitting elements corresponding to the one or the plurality of display windows; and a light-shielding wall housed in the outer case and arranged so as to shield between the opening and the one or the plurality of light-emitting elements.SELECTED DRAWING: Figure 11 |
