Car battery maintenance is relatively simple and can ensure your battery lasts as long as possible. If you don’t drive your car often or take frequent short trips, your battery may not get fully charged between starts. To prevent this from happening, take a long drive on the highway once a week to let the alternator charge the battery, or use a battery tender when you aren’t using the car. You should also clean the battery posts and connections with a wire brush to keep corrosion from building up. Adding a bit of dielectric grease to the contact points can also keep corrosion at bay.