It's about 16 deg F today. First time using the car in this cold weather. Started the morning commute with battery about 2 bars from full. It agressively charged to full by the time I had gotten to the highway ~3 miles. It continued to charge much of the trip to work any time I was part throttle I had about 3 bars of charge. So I guess it's doing that trying to put some heat in the battery. Once I realized that I shut off the aux fans I have blowing into the battery cooling duct behind passenger seat. So now the battery is balanced I guess. Only managed 67 mpg on way to work this morning. Probably going to full lower grill block tomorrow.