Originally Posted by
Seattle Forrest
I don't know the capacities on the two batteries, but I live in a very hilly place and shift a lot as a result. According to my Garmin, I make 200 - 300 rear shifts per hour of riding. (Multi-shifts count as several, shifting in the front gets you two rear shifts with it.) So it's probably not that the new battery is awful. At least don't take my experience as the norm.
I'm shocked how much life everyone else gets out of theirs.
I also ride in a hilly area and make about that many shifts - which I found surprising. I had no idea I shifted that much. Your experience parallels mine. When I went to the new battery, I now get about 600 miles instead of around 1000. The reason I went to the new battery was to be able to fiddle with all the Di2 parameters with the e-tube software.
I just set up a bike with an e-tap retrofit. I have to say, that's a really nice set up and I almost prefer it over the Shimano Di2 stuff.
J.