I am in Omaha, and I have only dealt with a cold battery once or twice. The battery wasn't the problem, but the engine warming was. It takes the engine awhile to warm up, especially if you want to use the heater; this destroys mileage.

I have a buddy in Canada who has a HiHy, and his comes with a block heater. I'm trying to get the local dealership to get it for me, but they have no knowledge of the part, much less how to install it. I think this would help out tremendously in the colder months. Besides, I fell empty driving around without a plug hanging out from the front of my car!