BTDN300 Internal Mount Di2 Battery (SD 300 Type)

Shimano BTDN300 Internal Mount Di2 Battery (SD 300 Type)

Powering the whole Di2 system, the Shimano BTDN300 Internal Mount Di2 Battery (SD 300 Type) has a lightweight, robust and efficient design that’s perfect for integration into high-end road bikes. Its compact size allows it to be discreetly mounted inside a seat post or frame, while it's comprehensive sealing easily sees off the worst weather conditions. One charge will last approximately 1000 kilometres of use and charging is performed via the Shimano Dura-Ace R9200 or Shimano Ultegra R8100 rear derailleurs or optional junction boxes.