Shimano Di2 BT-DN110 Internal Battery

BikeTiresDirect$200Buy

The creators who use it, or GearCred, may earn a commission when you buy through these links, at no extra cost to you.

From BikeTiresDirect

The Shimano Di2 BT-DN110 Internal Battery features new firmware and a larger memory capacity in the integrated chip that allows Synchro Shift and Bluetooth customization via Shimano's wireless E-Tube Project app | Shimano Di2 BT-DN110 Internal Battery