Just a short video of some winter flying in Edmonton, Canada. The first day the temperature was around -8C (17F) the second day it was -15C (5F). I keep the batteries warm until use and didn't notice any decrease in capacitance. I have a 20ft cord on the FPV ground station so I place the station outside and fly from inside the garage. I have had no problem with reception within 200m.
See my last blog for details on the quad.
I have since flashed the ESCs with simon. I do notice a difference but I think I still need some tuning.