Shimano BTDN300 Internal Mount Di2 Battery (SD 300 Type)

Features

• The power house of Shimano Di2 is this long-life 7.4V Li-Ion battery
• The design is lightweight, efficient and creates a robust and reliable system
• Compact size allows it to be discreetly mounted inside a seatpost or frame
• Excellent sealing and reliability have been proven through tests within extreme temperatures, rain, mud, and cobblestone roads
• One charge gives a 1000 kilometre range (depending on conditions and front mech operation)
• The lifespan endures 500 charging cycles
• Reliable and secure water resistant SD300 E-tube wire connections
• Charging is done via the Dura-Ace R9200 or Ultegra R8100 rear derailleurs or junction boxes
• Compatible with Dura-Ace R9200 or Ultegra R8100 Di2 configurations only
• Manufacturer claimed weight: 50 grams