Originally Posted by
Jarrett2
I wonder how cold affects all the batteries. I ride down into the mid 30's and at that point I find all of my battery operated devices suddenly have a much shorter functional cycle at those temps. I've had my power meter drop out on me, various lights cut out in the middle of a ride, speed sensors, cadence sensors as well.
None of that really makes a substantial impact on my ride, but if my shifting suddenly stopped on a 35 degree ride, that could be a real problem.
Li-ion is pretty much fine until you go a lot colder and is actually the near the best of the readily available rechargeable battery chemistries for cold performance. NiMH is much more cold sensitive.
I'm up here in MN and I routinely ride my Di2 bike in the cold. Every ride last week was at night and the temps where hitting down to 35F give or take a few degrees. I didn't notice any difference in battery capacity at all. I pretty much wind up charging my Di2 battery about every 1000 miles or so regardless. Even then, I've not seen it get lower than 40%. I would say it is has not been an issue for me.
J.