Shimano BT-DN300 Di2 Battery 12 Speed Echelon Whether you’re preparing for a

Whether you’re preparing for a race

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It’s safe on all surfaces

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Shimano BT-DN300 Di2 Battery 12 Speed Echelon Whether you’re preparing for aThe 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