You are reading a single comment by @hippy and its replies.
Click here to read the full conversation.
-
I ran a Di2 battery in a Conti saddle pack with a hole poked in it for a year or so until @chak gifted me a proper battery mount from the Evans spare parts bin.
You could have an external battery mounted underneath the saddle, like some of the pro teams have on their TT bikes. Not entirely sure how you'd get the cable out - presumably out of the top of the seat post.