Internal Battery

Internal Battery

Non-series components BT-DN110

With the launch of Dura-Ace 9100 came new firmware offering road riders Synchronized Shifting options between front and rear derailleurs. A short while later this technology was made available to Ultegra 6800-series and Dura-Ace 9000-series riders who have the latest Di2 battery. Synchronized shifting is also available on mountain bikes and GRX.

The new battery (BT-DN110/BT-DN110-a) contains a memory chip that can handle the processing power required to deal with the multiple shift patterns and customizations that Synchronized Shifting brings, offering you the choice to suit your gear positioning to your personal riding style.

In order to charge this battery just connect your SM-BCR2 to either your bar-end/frame junction or below-the-stem mounted junction box and plug it into a power socket or laptop. Note that the USB port you plug the charger into should supply at least 1A.

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