Lipos do well in the cold as long as they are not directly in the prop wash such as profile style planes. I have even left my heli in my unheated garage for hours between flights in 23 degree weather. The first minute of hovering demonstrates reduced head speed then the battery warms a bit and, yes, you are flying. By the way i just got a 20 minute flight using 3s1320mah thund power battery using the 8t pinion motor. This is a great set-up for beginning heli pilots.