Shimano BT-DN300 Built-In DI2 Battery - For Dura-Ace 9250 and Ultegra R8150 Systems, Compatible with SD300 Wires
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Shimano Di2 Batteries. Must purchase battery, charger, and power cable to complete the system.
- All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
- Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
- Compatible with thinner, next generation electric SD300 wires and R9250 and R8150 series systems
- Features three SD300 wire ports
- Shared fixing method with BT-DN110
- Built-in type
- U.S. spec