How do you stop a car battery from dying in the winter?

Answer 1

In the winter, your car's oil starts to congeal making the car harder to start. It takes more amperage than in summer to run the starter. Three things could be happening. First: you could be using an inadequate battery. You could be using a battery at the low end of the amperage range that will start your car. You need to get a more powerful battery with greater amperage. Second: batteries slowly wear out. As pieces of the electrodes wear out and fall to the bottom of the battery, the battery looses amperage and must be replaced with one of adequate size. Third: you could have a wire with some insulation worn. Electricity from the battery can slowly leak out of your battery. Enough can remain to start your car in summer but not in winter. You can check your wires for worn insulation.