With the subfreezing temperatures we've been having, and with the very light schedule I've had since the first of the year, I've been backing the car out of the garage and letting it run for fifteen minutes every couple of days. I'm just superstitious now about the battery, even though we have the as-yet-unused charger here...which is wonderful to remember. It's still sitting in a corner, and every couple of days when I pass by it I give the check-voltage button a push just to see that it's still charged. Which of course it is, but hey, I get to indulge in my little superstitions, right?