| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a battery device for electrically driven bicycle, capable of suppressing deterioration of a function of the battery device to the minimum, and changing color of an outer surface and design to desired color and desired design easily.SOLUTION: A battery device for electrically driven bicycle mounted on an electrically driven bicycle body detachably comprises: exterior cases 23A, 23B for storing a battery body; and detachable cylindrical covers 24, 25 in a posture of covering outer peripheries of the exterior cases 23A, 23B.</p> |
