What is the expected battery drain / life when temperature drops below freezing with a wind chill below 0.

What is the expected battery drain / life when temperature drops below freezing with a wind chill below 0.

"wind chill" is not a temperature, but a computed 'feel' related to rate of transfer from human flesh.

I was told that the battery will be kept warm as long as it is plugged in and because it is so large and well insulated it won't reach outside temps...If you leave it outside for a long time charged but not plugged in, the engine may come on when you first start driving it until things are warmed up....