The Shimano Di2 BT-DN320 Battery is the compact power source behind the XTR wireless shifting system, delivering fast, precise, and consistent performance. Designed specifically for the wireless XTR M9250 rear derailleur, this 310 mAh battery fits securely inside the derailleur body, protecting it from trail impacts and harsh riding conditions. Its integrated design keeps weight low and the system clean, while remaining fully removable for easy charging and service.

Built for long-lasting reliability, the BT-DN320 offers extended ride time on a single charge, ensuring that riders can focus on the trail, not their battery life. Whether you're racing cross-country or tackling rugged terrain, this battery supports seamless Di2 shifting performance in a low-profile package that stays out of harm’s way. It’s a critical component of Shimano’s cutting-edge wireless drivetrain, combining smart design, durability, and endurance.