Di2 BT-DN300 Battery for internal mounting The new Shimano DN300 battery features the same waterproof design that Di2 users have loved for generations. Now with 3 EW-SD300 ports, it delivers stable power to Shimano’s 12-speed road front derailleurs and rear derailleurs (if a fully wired option is selected). THE SCIENCE OF SPEED: Shimano Di2 BT-DN300 Battery 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. Features – Shimano Di2 BT-DN300 Built-In Battery Compatible with thinner next generation electric wire SD300 and systems after R9250/R8150 series 3 SD300 ports Shared fixing method with BT-DN110 For built-in installation in the frame or seat post High-power lithium-ion battery
