Shimano BT-DN300 Built-In DI2 Battery - For Dura-Ace 9250 Ultegra R8150 Systems Compatible SD300 Wires

$184.99
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Shimano BT-DN300 Built-In DI2 Battery - For Dura-Ace 9250 and Ultegra R8150 Systems Compatible with SD300 Wires. 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/