Shimano DN320 Di2 Battery

The Shimano BT-DN320 Di2 Battery is a revolutionary component specifically designed to power Shimano's cutting-edge 12-speed wireless mountain bike Di2 rear derailleurs, such as the XTR RD-M9250 and XT RD-M8250. This compact and robust Lithium-Ion battery marks a significant departure from previous Di2 systems, enabling a truly integrated and wireless electronic shifting experience for off-road performance.

• Direct Derailleur Integration: Unlike other Di2 batteries, the BT-DN320 is engineered to fit snugly and protected within a dedicated compartment inside the new wireless rear derailleurs. This innovative placement eliminates the need for internal frame wiring to the battery, simplifying installation and maintaining a remarkably clean bike aesthetic.
• Full Wireless Technology: As the power source for the derailleur directly, this battery enables the "full wireless" nature of the new Di2 MTB system, where the shifters communicate wirelessly to the derailleur, resulting in a cable-free cockpit.
• Protected & Removable Design: Tucked safely within the derailleur's robust structure (often behind a skid plate or stabilizer), the battery is shielded from trail impacts, mud, and debris. Despite its integrated fit, it remains completely removable for convenient charging using the Shimano EC-DN100 charger (sold separately).
• Optimized Power Output: Provides stable and consistent power for the rapid, precise, and smooth shifting performance Shimano are renowned for.
• Decent Capacity: With a capacity of approximately 305-310 mAh (2.32 Wh - 3.7 Wh), it offers ample riding time on a single charge, allowing riders to focus on the trail rather than battery life.
• Lightweight: Despite its robust integration, the battery remains very lightweight (approx. 23-27g).