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Bosch Bosh Powertube 400 Vertical Frame-mounted Battery 400 Wh
Mahle Mahle IX350W Battery for X20 Drive Unit - 250Wh
Bosch Bosh Powertube 500 Vertical Frame-mounted battery 500 Wh
Bosch Bosh Powertube 500 horizontal Frame-mounted battery 500 Wh
Bosch Bosh Powertube 625 Hprizontal Frame-mounted Battery 625 Wh