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Create an account- Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
- Compatible with thinner, next generation electric SD300 wires and R9150 and R8150 series systems
- Features three SD300 wire ports
- Shared fixing method with BT-DN110
- Built-in type
- U.S. spec
- Charger and power cable sold separately
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Review Shimano BT-DN300 Di2 Internal Battery