A dead car battery is a common problem that leaves people inconvenienced and frustrated. Depending on the cause, a dead battery may be easily jump started by another battery or it may require replacement altogether. But you do not have to wait for the dreaded breakdown to start thinking about your battery. Taking proper precautions to lengthen the life of your car battery and educating yourself on warning signs may prevent you from needlessly getting stranded.

Most automobile batteries require a certain level of water, though some are maintenance free and do not require that you monitor it. Check the water level in your car battery every few months, and if necessary add distilled water without overfilling. Battery terminals often collect deposits that can impede the electrical current. Corrosion can be found by performing a simple visual inspection, and is easily removed with a wire brush, a solvent or both. Ensure that the ends of the battery cable are tightly affixed to the terminals, with no room to move them if you try. Also, make sure that the battery is securely attached in a harness or tray, as vibrations and bumps can loosen connections and even reduce the operating life of the battery. Be sure to use extreme caution when inspecting, refilling and touching a vehicle battery.

Your vehicle probably has a battery warning light alongside the other warning lights, but this light does not indicate that your battery is low or dead. You should see the battery light illuminate when you first turn the key, and go out as your vehicle starts. If the battery warning light comes on or begins to flash while you are driving, it likely means that the alternator is unable to charge the battery as it should. While this light does not signify an emergency, it is impossible to tell how much life is left in the battery when the light comes on. Turn off electrical accessories such as the radio, windshield wipers, heater and headlights while the battery light is on, and try to avoid using power windows and turning signals. If possible, drive directly to a mechanic or battery specialist who can test your battery's voltage, check the water and pinpoint problems with current.

If your battery has been tested and works but your vehicle will not start, there may be an issue with the alternator or starter. It is generally recommended to replace an automobile battery about every four years, though driving habits, climate and other factors affect the true life span of a battery.

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