[tigeba]

My experience is that the decrease during cold weather is more a function of the lowered performance of the battery than the result of the cabin heating. The battery draw at freeway speed is maybe 30kw. The baseline draw from the accessories in the vehicle ( radio, console ) and no heating/cooling/defroster is around 0.5kw. With the heat cranked up all the way and all the various heaters turned up to high the additional draw above baseline is 2-2.5kw.

[lectrick]

Of course I can't find the links now via Google, but I saw an announcement recently (multiple actually) about batteries in development that are not affected by cold temperatures AND have higher charge capacity AND speed than Li-Ion. I believe (guessing here) it involved aluminum (but not those charge-only-once aluminum-air batteries... something else).

If those batteries were released commercially within the next 5 years, it would be a game-changer

[tigeba]

I have just been scheduling a 100% charge overnight when its below freezing to compensate for the loss of battery efficiency. Normally I just charge to 80%. This is mostly just for peace of mind, my trip is about 20 miles each way.