TA...Yes please. Particularly for disc brakes.
Originally Posted by
elcruxio
How long do the batteries last? What are the charging possibilities? Does one need to carry extra batteries?
These are the questions I would ask if I was considering e-shifting. Of course all of those are dependant on shifting frequency but it's sometimes hard to predict. On our last tour just last week we were doing a homeland tour and due to the peculiar geography and road conditions of ours we were doing hundreds if not thousands of shifts per hour. That has to have an effect on battery duration
IRL (and per Shimano's official rating), a Di2 battery lasts about 1500km. Depending on how much FD shifting one does-as the FD is the main draw of power. I just toss my Di2 charge brick in my pannier as a precaution, along with my 20Ah USB battery I also use for my phone/Garmin. A Di2 battery can go from zero->hero in 90 minutes.