Shimano BT-DN300 Built-In Type Di2 Battery

SHIMANO INTERNAL BATTERY BT-DN300

Chemistry Li-lon

Rated voltage (V) 7.4

Rated Capacity (Ah) 0.5

Rated Capacity (Wh) 3.7

Compatible charger  RD-R9250, RD-R8150, RD-R7150, RD-RX825

Master unit, Firmware update by E-TUBE PROJECT

SD300 port (pcs) 3

Average weight (g)  52