I live in a location where come December it's usually full on winter with -20 celcius and snow until mid-March or so when temperatures start to warm up a little. Granted there are some warmer days in there I could fly in, say -10 or so but not many. My question is, if I have to store my batteries for a month or more, what is the best procedure? Store it a certain power and leave it? Install it in the Phatom indoors but not fly it to mimic flying it to keep the batteries active? I understand the Phantoms can be flown in -20 if they are permitted to warm up properly with the battery performance decreased, I guess I could fly in those cold temperatures occassionaly?