High-capacity built-in BT-DN110-A7 Di2 battery designed for seamless integration with Di2 electronic shifting systems for reliable, precise gear changes. Constructed with durable, lightweight materials to optimize performance and longevity, ensuring consistent power delivery even on long rides and challenging terrain. Compatible with 's latest firmware updates via the E-Tube Project system checker, maintaining peak system efficiency and preventing malfunctions caused by firmware mismatches. Ideal for road, mountain, and gravel bikes, the BT-DN110-A7 offers a sleek, integrated design that maintains clean aesthetics and reduces clutter on your cockpit. Includes essential components such as the battery, charger, and power cable, enabling easy installation and ensuring your Di2 system remains fully powered for optimal shifting performance. Refresh your Di2 shifting system with the Shimano BT-DN110-A Di2 Battery. Designed to fit stealthily in seat posts and other internal mounts, this battery is compatible with Shimano's E-Tube technology to drive precise shifts no matter the conditions.