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Shimano SM-BCR2 E-Tube Battery Charger: For use with Alfine Di2, Dura-Ace 9070 and Ultegra 6770 equipped bicycles. SM-BCR2 Internal battery charger is specific to the SM-BTR2 internal battery. Includes USB (SM-USB1) power adapter.

• Plugs into SM-EW90 cockpit junction boxes or SC-S705 display unit
• Use with PC to update Di2 component firmware and change system functions