I live in a very cold and snowy part of ontario. My car stays outside for a few days at a time and when I need it, I end up clearing at least a foot of snow off it. My drives are usually 15 minute long and then the car sits for another eight hours before I start it again. I always use rear defrost, heated steering and heated seats, charge my phone and blast the stereo. Knock on wood haven't had any warnings yet and it starts up normal. It's puzzling that some have a problem with the battery and done don't.
