is it possible to charge a di2 external battery with the charger for internal batteries plugging into the junction box?
Also if i want to run 1x can i just not plug in a front derauillier?
No Yes
You can carry the cylindrical "internal" battery in a case next to the bottle cage. This gives you charging via the front junction and the case also has 6 ports, replacing he lower junction. Oh, and internal wiring.
@Sainsburys_Ed started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
is it possible to charge a di2 external battery with the charger for internal batteries plugging into the junction box?
Also if i want to run 1x can i just not plug in a front derauillier?