All the Di2 components use the same batteries as before, and are just as hackable in that way. Shifting becomes harder to hack, but Shimano is now providing software to let users keep up with all the updates that will roll out over the years. Sequential shifting? Shimano says it's a possibility, probably in the future.
Shimano chose to launch its Ultegra Di2 TT components at the USA Pro Cycling Challenge in Denver, Colorado. The launch occurs simultaneous to the closing TT that would decide the race, and also concurrent with the launch of the new Orbea Ordu. TriRig was there to get all the details of the new system and bring you detailed photos of it all.