Di2 Battery - BT-DN110-A7 Di2 Battery - BT-DN300 Built-In DI2 Battery - BT-DN300 Built-In DI2 Battery

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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 compon ents with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/ Show more