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Shimano SM-BTC1 Battery Case - Bottle Cage Mount

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The Shimano Battery Case Bottle Cage Mount SM-BTC1 mounts Shimano's SM-BTR2 battery (not included) on a bike's water bottle bosses and also acts as a Junction B, connecting wires from the shifters to the battery and derailleur. The SM-BTC1 mount also acts as a cable organizer, keeping your bike looking tidy. Shimano Di2 BTR2 battery sold separately.


  • SM-BTC1 mounts current SM-BTR2 battery externally next to bottle cage
  • Low profile design mounts to any frame with bottle cage mount
  • Junction B function
  • Six E-tube wiring ports with cable organizer
  • Clean appearance thanks to internal wire routing
  • System expansion thanks to E-tube platform

Model Number
Item Code
Shimano SM-BTC1 Battery Case - Bottle Cage Mount