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.
Very hilly here in lynnwood as well, just a short drive from Seattle. I know I shift quite a bit but it’s more like three or four times that mileage. I suspect the greater use of the front derailler with the rear is the culprit. I’m stubborn and if I had not got the incredible deal I did, charging my bike wouldn’t cross my mind because I was a nay sayer on Di2 until I tried it. Not sure how many times I shift an hour but I will estimate it’s not 300 maybe 200 is accurate. I know your into those scenic mountain rides so that may have something to do with it.