I have been flying in Montana the last week with temps around minus 10-15C. Been following all the advice I have picked up from previous postings on the topic.
Have had nil issues with the Mavic, but it has been my IPHONE 6S that has struggled. Had phone charged at 100% and after 10 mins of flight the phone shutdown - thankfully clicked RTH on controller and after a fairly nerve wracking 2-3 mins the Mavic appeared on the horizon heading home.
After warming up phone and turning back on it was at 85% charge. Just a warning for others - a bit scary when it happens and Mavic is about 1200metres away and it’s super cold.