Slim integrated compact and delivering 400 watt hours at a weight of only around 2 kilograms it's a real energy champion: The CompactTube 400 with innovative battery cell technology offers the highest energy density of all Bosch eBike batteries. This makes the extra-lightweight battery the ideal choice for sporty light eMTBs minimalist eGravel bikes or design-oriented eUrban bikes – in short for anyone who loves the sleek appearance of conventional bikes but doesn't want to do without electric support.

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EB12100046