Hello,
I propose you to read an online article dealing with a project of heater LiPo batteries bag for drones or electronic equipments from this page of my blog: Sac chauffe-batteries pour drones en hiver
There are many pictures and you could use Google tools to translate...
I took the Typhoon H out on the weekend for a quick "temperature test".
It was 1 degree Celsius (34 Fahrenheit) outside. With the Typhoon H in its shipping case (in a backpack), I took it from the heated house to the car. Drove 10 minutes to a field. Took it out of the car and placed the...