Follow these nine steps to help your car battery last longer and be ready to start, no matter the condition: Turn off your vehicle when you’re not driving it. Make sure your car battery is fastened firmly in its correct place. Regularly clean the battery and its components. Replace the car battery terminal if corrosion has already set in. Regularly charge the battery.  Top up your car battery fluids. Service and maintain your battery twice a year. For a more detailed explanation, refer to our guide on how to maintain your car battery like a pro.