Shimano Dura-Ace Di2 SM-BCR2 Charger for BT-DN110A
Battery charger with USB cable for Shimano's SM-BTR2/BT-DN110A Li-Ion battery. You can only connect the charger to SM-EW90-A, SM-EW90-B and EW-RS910 power distributer. The SM-BCR2 is also an interface for the Shimano E-Tube configuration software.