Shimano BT-DN300 Di2 Battery 12 Speed Echelon Keep your wireless drivetrain performing

Keep your wireless drivetrain performing at its best with the SRAM RED eTap AXS Replacement Derailleur Battery

The result is an incredibly strong and reliable stem

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Shimano BT-DN300 Di2 Battery 12 Speed Echelon Keep your wireless drivetrain performingThe 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