MAHLE Smartbike Systems X20 External Range Extender Battery - 36V/173Wh

.top{margin-bottom:30px;}.top li{margin-left:5%;margin-right:5%;margin-top:10px;line-height:120%;list-style-position:outside;}MAHLE Smartbike Systems External Range Extender Battery - 36V/173Wh. MAHLE X20 optional Range Extender Battery adds 173Wh to extend your ride from 50-70km (30-43miles) when needed.Battery mounts in place of a water bottle when needed and its holder will double as a standard bottle cage when the battery is not needed Lightweight at 1.1kg Charges to 80% capacity in under an hour