BICYCLE ELECTRICAL COMPONENT

A bicycle electrical component is basically provided with a cover, a battery and a wireless communication unit. The cover is configured to cover an opening formed on a bicycle. The cover has a centerplane bisecting the cover in a thickness direction of the cover, a first side and a second side opposite to the first side with respect to the center plane. The battery configured to be attached to the cover and to be entirely disposed on one of the first side and the second side. The wireless communication unit is configured to be attached to the cover and to be entirely disposed on the other ofthe first side and the second side. 种自行车电部件，其基本上设置有盖、电池和无线通信单元。盖被配置为覆盖形成在自行车上的开口。盖具有将盖在盖的厚度方向上平分的中心平面、第侧和相对于中心平面与第侧相反的第二侧。电池被配置为附接到盖并且整体地设置在第侧和第二侧中的个上。无线通信单元被配置为附接到盖并且整体地设置在第侧和第二侧中的另个上。