Sorry if someone has already asked about this, but does anyone have any details about Shimanos Di-2 seat post battery, I know Calfee retro fit battery's but they don't do anything for the new 11spd kit.
someone move this to the vsalon tech section
im sure justin knows....
Does this help?
Closeup Look at Shimano Dura-Ace Di2 9070 SM-BTR-2 Internal Battery! - Bike Rumor
Wheelworks Handcrafted Wheels
Thanks that helps a lot