Bosch eBike Systems is changing its production for reasons of sustainability. In future, the black color coating will be omitted, giving the housing a silver-coloured appearance. As a result, both color variants will initially be available on the market.Key Features:Length: 424 mmNew, lighter housingBattery can be integrated into the bicycle frameEasy and safe to insert and removeIntegrated battery management system ensures high mileage and long service lifeNo memory effect and no self-dischargeImportant product information:Due to the different battery designs and mounts, the new PowerTube 600 (BBP3860) and PowerTube 800 (BBP388Y)batteries are not interchangeable with PowerTube 750 (BBP377Y), PowerTube 625 (BBP376Y) , PowerTube 800 or PowerTube 500 (BBP375Y).