IBTDN3002
![Shimano BT-DN300 Built-In DI2 Battery - For Dura-Ace 9250 and Ultegra R8150 Systems, Compatible with SD300 Wires](http://shopbikesupply.com/cdn/shop/files/EX1012_{width}x.jpg?v=1715213923)
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