Bosch Dual Battery Power Pack Cable A Y System Block Battery E-Bike Stretcher Frame/Luggage Carrier/Y Cable for Dual Battery System Frame/Rear Rack Mount Power Pack (E-Bike Power Pack) : Amazon.de: Sports &
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Anyone using the Bosch Dual battery system? - EMTB Forums
Bosch DualBattery: info about mounting it right | E-Bike Blog