Shimano BT-DN300 Di2 Battery 12 Speed PSI Built to resist the derailed

Built to resist the derailed chain of a world tour sprinter powering under load

climbing alpine passes or chasing personal bests

Redesigned gear teeth profile to fit a wider gear pitch

FIRST APPLICATION: Take the chain off the bike or use brand new chain and clean it using a solvent (like White Spirit or mineral turps) by immersing the chain completely in the solvent for 20-60min using the poly bag that was delivered with the large lube bottle (Use gloves)

Shimano BT-DN300 Di2 Battery 12 Speed PSI Built to resist the derailedThe Shimano BT DN300 Di2 Battery (12 Speed) features the same waterproof design Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12 speed road derailleurs and shifters when a fully wired option is selected. The same size as its predecessor, the slim DN300 battery can be housed inside seat posts or frames for a clean aesthetic. The third port is for riders who want the redundancy of Shimano's 12 speed Di2