BT-DN300 Di2 Internal Battery

The new Shimano Di2 BT-DN300 Internal Battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12-speed road derailleurs and shifters (if a fully wired option is selected).

With the same size as its predecessor, the slim Shimano Di2 BT-DN300 Internal Battery can be housed inside seat posts or frames ensuring a clean aesthetic. Now with 3 ports, the BT-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.

Features

• Compatible with thinner next generation electric wire SD300 and systems after R9250/R8150 series
• 3 SD300 ports
• Shared fixing method with BT-DN110