Shimano SM-BTC1 external Battery Bracket for SM-BTR2 (internal)
Power cord included Led signals when charge is complete
Shimano Di2 Internal Battery Charger
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Shimano BCR2 BCR1 Di2 E-tube SM-BTR2 Internal Battery Charger PC Link Black
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eTap Battery Charger Di2 for Shimano 6870 9070 8050 8070 9150 XT XTR SM-BCR1/BCR2 Controller Display - AliExpress
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Shimano SM-BTC1 external Battery Bracket for SM-BTR2 (internal)
Power cord included Led signals when charge is complete
Shimano Di2 Internal Battery Charger
Shimano SM-BTR2 Di2 Battery - Components