The Shimano BT-DN110 battery contains a memory chip that can handle the processing power required to deal with the multiple shift patterns and customisations that synchronized shifting brings. This allows you to set your gear positioning to your personal riding style. The Shimano BT-DN110 Di2 Internal Battery for R8000/R9100 suits Shimano 11 speed Di2 electronic groupsets with EW-SD50 wiring.
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Shimano BT-DN110 Internal Di2 Battery
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