What is the normal charging rate on a cold kona? And by cold I don't mean "UK" cold where it's 7 degrees C, I mean Quebec cold where it's -10 to -20 celsius. This morning it was about -9 and I preheated my kona for 30 min then drove to work for about 15 min. I plugged in a 50kw charger at work and with 14% battery I was only getting 18kw charge rate. Does this rate improve after a short time or does it stay this way? I've been searching on Google for this but the videos I find are from England and what they consider cold is not really the same as what we consider cold. Are there any tests done in Scandinavia or other real cold places you can point to?