Internal Battery

Internal Battery


The BT-DN300 battery connects to the rest of the Di2 system using the EW-SD300 wires.

Is it backward compatible? Unfortunately not. Not only does it use a different port type (SD300), it also just does not have the firmware to handle 11-speed Di2 components.

Just like the previous generation BT-DN110, the BT-DN300 is also a seatpost mounted battery.

Semi-wireless Di2

The Ultegra R8170 and DURA-ACE R9270 series are semi-wireless. Both derailleurs are connected to the battery using EW-SD300 wires, but the shifters communicate wirelessly. This battery has three ports, allowing you to connect wires to it without having to use any junction boxes.

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