전기자전거 보조배터리도있어요

제가보조배터리랑 자전거합쳐서140정도들었는데 잘 안타서 팝니다 5번도안탔어요 배터리방전된적 없이 사진처럼잘나와요 https://m.smartstore.naver.com/hwashinbicycle/products/6830181097?nl-query=20e+volt+%EC%8A%A4%EB%A7%88%ED%8A%B8%EC%A0%84%EA%B8%B0%EC%9E%90%EC%A0%84%EA%B1%B0.&nl-ts-pid=iyU9Adpr4bCss7AtOT8ssssssiw-370487&NaPm=ct%3Dm300m7ag%7Cci%3D77c2f83c0a884ad3dcb92305dc8da94af9b1faca%7Ctr%3Dsls%7Csn%3D5657615%7Chk%3D8f811c35f89aca9d9c9d742def633d31bdb1d2e4 이모델같은데..제기억으론 정확한건 사진모델참고바래요! 보조배터리도있어요