Battery

摘要

A battery includes a battery cell and a battery housing. The battery cell includes arcuate portions wherein an outer circumference of the battery cell is formed at least in part to be arcuate. The battery housing includes angular portions respectively opposing the arcuate portions and for storing the battery cell therein. Support walls having substantially the same curvatures as the arcuate portions and supporting the arcuate portions are formed along an insertion direction of the battery cell.