The article mentions that the batteries don't perform well at -20°. I wonder what Tesla has done to prevent freezing and how well their systems work in the ext

The article mentions that the batteries don't perform well at -20°. I wonder what Tesla has done to prevent freezing and how well their systems work in the extreme cold. My guess is that they have planned for this but it would be nice to hear from someone in a colder country that can confirm the performance of the batteries in extreme conditions.