* Drive it regularly. The best way to keep your car battery charged is to drive it regularly. This allows the alternator to recharge the battery. If you can't drive your car for a week or more, consider driving it for at least 30 minutes once a week.
* Use a battery tender. A battery tender is a device that connects to your car's battery and provides a trickle charge to keep it topped off. This is a good option if you don't drive your car very often.
* Disconnect the battery. If you're going to store your car for a long period of time, you can disconnect the battery to prevent it from draining. Be sure to reconnect the battery before you drive your car again.
* Check the battery terminals. Make sure the battery terminals are clean and free of corrosion. If the terminals are corroded, clean them with a wire brush and baking soda solution.
* Test the battery. If you're not sure if your battery is still good, you can have it tested at an auto parts store.
