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Top Reasons Why Car Batteries Die: How to Prevent Battery Drain

Car batteries are one of the most important components of your vehicle’s electrical system. They power everything from the engine to the lights and audio system. However, if your battery dies, your car won’t start, leaving you stranded and inconvenienced. Aside from having a flat tire, this is also a common problem that car owners face. Here are the top reasons why car batteries die and how to prevent battery drain.

Leaving Lights On

One of the most common reasons why car batteries die is leaving lights on. This can happen if you forget to turn off your headlights, dome light, or trunk light after you leave your car. These lights can drain your battery overnight, especially if your car isn’t driven frequently.

To prevent this, make sure to turn off all lights before leaving your car. You can also install an automatic shut-off device that turns off lights after a set amount of time.

Not Driving the Vehicle Frequently

Car batteries need to be charged regularly, which is why not driving your vehicle frequently can lead to a dead battery. If your car is left unused for long periods of time, the battery can slowly lose its charge until it’s unable to start your vehicle.

To prevent this, start your car at least once a week and let it run for 15-20 minutes. This will help keep your battery charged and prevent it from dying.

Extreme Temperatures

Extreme temperatures can also affect the lifespan of your car battery. In hot weather, the heat can cause the battery fluid to evaporate, which can damage the internal components and lead to a dead battery. In cold weather, the cold can make it harder for the battery to produce enough power to start your vehicle.

To prevent this, park your car in a garage or shaded area to protect it from extreme temperatures. You can also invest in a battery blanket or heater to keep your battery warm during the winter months.

Corroded Battery Terminals

Corroded battery terminals can also lead to a dead battery. Over time, the battery terminals can become corroded from exposure to moisture and other elements, which can hinder the flow of electricity and prevent the battery from charging.

To prevent this, inspect your battery terminals regularly and clean them with a mixture of baking soda and water. You can also apply a small amount of petroleum jelly to the terminals to help prevent corrosion.

Old Age

Like all components of your vehicle, car batteries have a limited lifespan. On average, most car batteries last between 3-5 years. If your battery is nearing the end of its life, it may be time for a replacement.

To prevent this, have your battery inspected regularly and replace it if necessary. You can also invest in a battery charger to help extend the lifespan of your battery.

In conclusion, there are several reasons why car batteries die, but there are also several ways to prevent battery drain. By taking proactive measures such as turning off lights, driving your car regularly, protecting it from extreme temperatures, inspecting and cleaning your battery terminals, and replacing your battery when necessary, you can help ensure that your vehicle’s battery stays charged and ready to go when you need it.


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Harold Brooks

​Durham Towing Company is a fully insured and certified roadside service company centered in Durham, North Carolina. We service Durham, Chapel Hill and the surrounding communities on a 24/7 basis and take pride in our full suite of tow trucks and equipment to address your unique Road Service situation. In addition to our top notch Towing service, we also offer Emergency Roadside Assistance if you become stranded on the open road with a flat-tire or your battery dies. We also have an on-site Auto Repair facility and are experts as an Auto Wrecker Service center with an on-site salvage yard where you can get great deals on Reconditioned Auto Parts.