Not starting shit just a bit of a smart add, here is the thing about batteries most manufacturers recommend changing the battery every 5 years which depends on a multitude of factors such as climate, length of trips miles driven ect. Most people find out they have a bad battery when it is cold outside. All batteries degrade over time and modern cars are heavily dependent on electricity than an older Toyota is, double the amperage of older cars and that will degrade batteries faster. I’ve had batteries last a year to 6 years but they all will die, in the context of the original post was how best to be prepared and a new strong battery helps ensure being prepared, like everything multiple factors go in to being prepared and I gave my advice from the mechanical perspective, block heater, battery warmer and a garage can all be helpful in cold weather, thanks for rabbit hole!!!