Shimano Di2 BT-DN300 E-Tube Battery 3-Port

The Shimano Di2 BT-DN300 E-Tube battery powers Di2 systems in a lightweight and efficient way. The sleek design allows the battery to be discreetly mounted inside a seatpost all while sealing it off to the worst weather conditions.

• Shimano Di2 features a compact and durable 7.4V Li-Ion battery that minimizes shifting effort.
• Field-tested for reliability in various conditions, including extreme temperatures and terrain. Its single internal battery design ensures lightweight efficiency and robustness.
• With a 1000 km range on one charge (depending on conditions), and 500 recharge cycles, it offers long-lasting performance. Installation is typically within the seatpost or frame/fork using manufacturer-provided hardware.
• The water-resistant SD300 E-tube terminals provide secure connections.
• Charging is conveniently done via stem junction or handlebar display, with the battery weighing just 50 grams.