Shimano Battery Mount for SM-BTR2 Focus and determination defines you. You are streamlined and efficient. You embrace the most difficult challenges and refuse to give up. You never make excuses, you never stop trying. You conquer mountains from the bottom up, never satisfied with only the descent. You crush the whole loop, every pedal stroke a relentless assault on gravity, your competitors and your personal records. You are XTR and XTR is you. Seriously fast. Confident. Experienced. XTR is committed to rewarding your every effort and has the pedigree to deliver. Dripping with performance, the XTR M9050 drivetrain will not only transfer every watt of energy from pedal to wheel, it will seamlessly shift between perfectly spaced gears allowing you to maintain critical rhythm and momentum over any terrain. You tell yourself you can race without XTR, but you won't. Never second guess your first instinct. Shimano XTR Di2 M9050 brings the legendary performace of Shimano XTR into the digital realm. Shimano's game-changing Di2 technology uses powerful digitally-controlled servo motors, which are built into the derailleur bodies, to deliver clean and accurate shifting, time after time. All Di2 componentry is sealed and waterproof, ensuring performance even in the most brutal conditions. The Shimano Battery Mount for SM-BTR2 allows you to position the SM-BTR2 battery externally by mounting to your bikes bottle cage mounts. The low-profile design allows the SM-BTR2 battery mount to be used with any frame with a bottle cage mount. Maybe you don't want the hassle of an internal battery, or your frame just won't accomodate, the Shimano Battery Mount for SM-BTR2 is exactly what you need to bring the power outside of your seat tube. Use of the external battery mount also shorts the distance necessary to connect derailleurs and allows the battery to be charged directly if preferred. Features: 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 Shimano Part: SM-BTC1 Claimed weight: 51g SHIMANO XTR M9050 Compatibility Chart | Shimano Di2 Battery Mount for SM-Btr2 Battery Case, SM-Btc1