- Components
- Electronic Shifting
- Shimano D12
- charger di2 for btr2 black
- Di2 charger for the internal battery that will keep your Di2 system shiftingdi2 uses a powerful long-life 7.4v li-ion battery: keep it in top condition and ready for shifting with this specific Shimano Di2 charger1.5 hour charge timeplugs in directly to the sm-ew90 handlebar junction acan also be used for completing firmware updates when linked to e-tube software on your pc