[John Locke]

Batteries work by causing chemical reactions. Chemical reactions go faster when warm, and slower when cold: that is simple thermodynamics.

In cold weather, steam engines stay warm, diesel engines stay warm, gasoline engines stay warm. Batteries get cold. Duh!

[oldasrocks]

They just need solar powered heated garages to put the Telsa in.

Otherwise get 10 lba of charcoal and light it up under the car to keep it warm.