Shimano Di2 internal battery charger - SM-BCR2
This Shimano Di2 internal battery charges your Shimano DI2 system. The charger keeps your battery in top condition with a fully charged battery. This ensures shifting like a pro. The charger will charge a battery full in 1,5 hours and can be plugged directly into the SM-EW90, SM-EW90a, SM-EW-90B and SM-EW-RS910 junction box. The charger is easy to fit into the junction, just lift the small lid on the Shimano Junction Box and plug it in.
The charger can also be used to complete firmware updates on your Shimano DI2 system and to make customized shifting on your levers. Link the charger with the E-tube software on your PC and you can customize and update.