Does anyone make a battery heater/warmer that can be used to hear up p3 batteries to operating temperature in the winter and maintain their temperature for safe flight?
I keep mine in a soft sided cooler with hand warmers inside.
Once in the aircraft and operational it will self heat pretty well. My main concern is having it up to a min of 70deg before placing in the aircraft and starting to use.
I use one of those 12v heater/coolers for the car. Plug it into the accessory socket and it keeps the battery warm in the winter and cool in the summer. Was only $30