Shimano BT-DN300 Di2 Battery 12 Speed PSI 5 and 175mm crank arm

5 and 175mm crank arm lengths

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Designed to facilitate an aggressive

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Shimano BT-DN300 Di2 Battery 12 Speed PSI 5 and 175mm crank armThe 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