Did you know that the starting capacity for your car battery dramatically drops in the winter months? According to Battery Council International, when the outside temperature is 80 F, a fully charged battery has 100% of its power available to start the vehicle, but when the temperature starts dropping that changes. When the temperature drops to 32 F, a fully charged battery has 2/3 of its power available, and when the temperature drops to 0 F, a fully charged battery has only 40% of its power available to start the vehicle.
So there are a few things that you can do to prevent battery failure during the cold months. If possible keep your vehicle in the garage at night, also, make sure the battery posts are tight and free of corrosion. Limit the amount of accessories charging in your car, and last but certainly not least, if you notice that your vehicle is having a hard time starting, plug it into a battery charger overnight to give it that little extra boost.