Di2 Battery BT-DN300 Front quiet braking

quiet braking

the Protone Icon helmet features the latest technological advances in safety

easy access storage

Perforated synthetic leather composite upper enables superior fit and breathability

radiant and unstoppable

Di2 Battery BT-DN300 Front quiet brakingThe new DN300 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 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