You can't let the battery get cold. It will ruin its life. (or too hot, for that matter)I also wonder about cold weather in the northern states and how the battery can decrease in these temps. Hybrid technology is really what needs to be adopted to all cars being produced now. Yes it still requires gas, but you can get amazing miles per gallon even on larger cars and trucks. An all electric car is great and probably works for most people, but it will not be a one size fits all solution to car production.
I'm pretty sure that all these battery packs in the cars have "smart temperature monitoring" and have electric warmer coils/elements built in, so that it will use some of the battery's energy to keep itself warm.
That does obviously have the effect of reducing the amount of charge you can get out of it, if it's using some of the energy to keep itself warm.
Solid point on the hybrids. The next SUV I buy, likely will be a hybrid rather than an all-out battery electric. But those days are coming sooner and sooner.