Shimano di2 bcr2 charger for btr2 batteryan essential component for maintaining your shimano di2 electronic drivetrain system, the di2 bcr2 charger is compatible with shimanos sm btr2, bt dn110 internal batteries. Simple to use, it connects your di2s handlebar junction, so there is no need to remove the battery from the bike for charging. This charger can also be connected to your pc via usb for software updates and customisation.features battery charger for sm btr2, bt dn110 and bt dn110 a di2 uses a powerful long life 7.4v li ion battery keep it in top condition and ready for shifting with this specific shimano di2 charger 1.5 hour charge time includes sm bcr2 charging cable plugs in directly to the sm ew90 handlebar junction a pc linkage device for e tube project to update firmware and customize settings plug lead not includeda 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.