Cold temperatures reduce battery efficiency and increase engine resistance. Battery CCA becomes important because it shows how well a battery performs in these conditions. If the CCA rating is too low, your car may not start on cold mornings. Choosing a battery with the right CCA ensures reliable starts, even when winter weather puts extra stress on your vehicle. https://manlybattery.com/battery-tools-and-resources/battery-cca-to-ah-calculator/