Product Description

Shimano Di2 Chargers. Must purchase battery, charger, and power cable to complete the system.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 (BA9070) 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 Universal Di2 ChargerAll Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/

Specs