I'm doing a bit of travelling now and don't have access to an outlet that I can plug in over night. The temperatures are about -5C and I have a long journey tomorrow. I've decided to charge my car up to 95% and leave it parked outside overnight near where I am staying. I know it's not good to charge above 90% very often, and I know that when charging to full, it's best to drive it pretty much right away so that the battery does not remain in a high state of charge for too long. But given my long trip and very cold weather, I wanted to get as much charge in as possible. How bad is it exactly to have a battery in a high state of charge and then freezing? Does the cold mitigate the potential damage? Or does it exacerbate the problem as is the case in extreme heat. Also, presumably 100% would be worse than 95%. But how much worse? I only really need 90% to reach the next charger comfortably, but I wanted that extra 5% to help pre-heat and pre-condition the car as I'm traveling with my family, who would not be willing to sit in a cold car .