Shimano BCR2 Charger for Internal Di2 Battery

Specifications

• Model: SM-BCR2
• Type: Internal Di2 battery charger
• Compatible Batteries: Shimano BT-DN110, SM-BTR2
• Not Compatible: BT-DN300 (12-speed Di2, charges via EW-EC300 cable)
• Connection: Plugs into the Di2 junction box, no battery removal needed
• Power Source: USB
• Additional Function: PC connection for E-Tube firmware updates and system settings

FAQ

Which Di2 batteries does the SM-BCR2 charge?

The BCR2 is the charger Shimano specifies for the BT-DN110 internal battery, and it also works with the earlier SM-BTR2. These are the 11-speed generation Di2 batteries that use EW-SD50 wiring.

Will the SM-BCR2 charge a BT-DN300 12-speed Di2 battery?

No. The BT-DN300 used in 12-speed Dura-Ace, Ultegra, 105, and GRX Di2 systems charges through the rear derailleur using the EW-EC300 cable, not through a junction box. If your system uses EW-SD300 wiring, you need the EW-EC300 cable rather than this charger.

Do I have to remove the battery from the frame to charge it?

No. The BCR2 plugs into the Di2 junction box, whether that is a bar-end, frame, or under-stem unit, so the battery stays where it is installed.

Can I use the BCR2 for firmware updates?

Yes. Connected to a computer over USB, the BCR2 also serves as the link for E-Tube Project firmware updates and system configuration changes.

Best For

Riders on 11-speed Di2 systems with a BT-DN110 or SM-BTR2 internal battery who need the correct Shimano charger, and anyone who also wants a way to run E-Tube firmware updates at home.