Shimano BUILT-IN TYPE Di2 BATTERY [SD300 TYPE]

With the same size as its predecessor, the slim DN300 battery can be housed inside seat posts or frames ensuring a clean aesthetic. Now with 3 ports, the DN300 simplifies wiring to front and rear derailleurs, supplying stable power at all times. The third port is for riders who seek the redundancy of Shimano's 12-speed Di2 wired option. Compatible with thinner next generation electric wire SD300 and systems after R9250/R8150 series 3 SD300 ports Shared fixing method with BT-DN110 SPECIFICATION Model No BT-DN300 Series SHIMANO Type Internal battery Chemistry Li-Ion 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 52