The Shimano BT-DN110 Internal Battery forms an integral part of the Shimano Di2 wireless shifting system

Shimano BT-DN110-A Internal Battery.


E-Tube - E-Ttube is Shimano's “service” that uses websites or apps to maximize the enjoyment of riding a bicycle by connecting the riders, the bicycles and Shimano.


Firmware update by E-tube Project
Master unit


Average Weight 50g
Type Built-in battery
Compatible charger SM-BCR2
Chemistry Li-Ion
E-tube connector (pcs) 0
E-tube port (pcs) 1
Rated capacity (Ah) 0.5
Rated capacity (Wh) 3.7
Rated voltage (V) 7.4
SD300 connector (pcs) 0
SD300 port (pcs) 0
SD50 connector (pcs) 0
SD50 port (pcs) 1

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