Definitely tire pressure needs a refill to keep that magic sidewalls working for you. Also, I suspect the battery itself is getting a heat up from the car on cold days. Inside the car, there is an auto-on and off I've noticed which threw the heat on for me and the seats heating on for me when I didn't prefer it. I set to manual only. I have lost about 2 miles of range since it cooled off, but again, I can't tell if it's the battery getting some TMS support or not. Still far less expensive than gasoline - FAR LESS.
America 1st - CHEVY VOLT, AMERICAN-MADE, AMERICAN-FUELED. White Diamond with everything.