Guys, can you tell me who installed the systems with the di2 battery, how did you fix it? Maybe there is some kind of 3d printable model to keep the battery in the seatpost, or some other options.
So far, I've only ordered a frame, I'm choosing a groupset, I'm leaning towards the LTWOO eRX-TT, but I don't know if I can fix the battery from it inside.