How Long Can A Car Sit Before The Battery Dies?

Batteries are an essential part of any type of vehicle. The most important contribution of a battery is that it allows you to start your car. However, when the battery is weak or damaged, you face the most inconvenience. The problem becomes very annoying when you can’t turn on your car.

So, how long can a car sit before the battery dies? The question comes to the minds of almost all vehicle users. In this article, we have given our best to give you a proper answer to that question. We had to do a lot of research and then we were able to bring the following points before you. So let’s find out how long a car can sit before its battery dies.

Does Idling Car Drain Battery?

According to sources, any of your cars can sit for a few hours, even a few days if the battery is not drained. However, there is a problem – there are several issues that are responsible for faster battery drain than when you drive in idle mode. Suppose:

  • Not turning off the taillights and headlights;
  • Decreasing car gas mileage;
  • Various electrical appliances, such as air conditioners, iPods, etc. are running in the car.

In fact, the battery can last up to seven hours without using your car’s engine. This means, if your car has a battery life of 6 hours, the battery can last up to about 36 hours before recharging.

How Long Can a Car Sit Before the Battery Dies?

A car’s battery can last up to six hours without using the engine, so theoretically a car could sit for up to 36 hours before needing a charge. However, there are many things that will drain a battery faster than just sitting in idle mode: turning off accessories like headlights and taillights, loads of electrical equipment running in the car ( iPods, air conditioning, etc), running down your gas mileage.

How Long Does a Car Battery Last Without Driving?

This is a good question because some people leave their cars for a long time. In this case, they should know how long a car battery lasts without driving.

However, it all depends on the age and use of the car and the battery. On average, however, we find that a car battery lasts about four weeks to two months without any driving. Also, keep in mind that weather affects car batteries. For example, if the weather is hot, the battery will die quickly. This loss can be offset if your car is equipped with a relatively high-powered electronics device.

If you do not use your car, it will be difficult for the battery to hold its charge. The main reason behind this is that the alternator cannot work if the car is not used. Now, the question may be what is the alternator. An alternator is a generator for a car’s electrical system that provides power to other electrical components, such as internal lighting, stereo, and headlights while maintaining battery charge.

How Long Does a Car Battery Last Without Being Charged?

This is a common thing among us – we often forget to charge the battery in our busy daily life. So, how long does a car battery last without being charged?

Each car should start at a certain time to keep its batteries running. However, on average, a fully charged battery can last from two and a half to three and a half weeks without any charge. In this case, the battery must be new. The time zone of the old ones will be reduced. If the car is left like this, the battery will be discharged after about 2-3 months.

Can a Car Battery Go Dead From Sitting?

Of course. You may have left your car and thought that its battery is not being used. Like the car, the battery is sitting and relaxing. But your thinking is completely wrong. Even if your car is relaxing, the battery is still running. The battery keeps the various systems of the car, such as climate control, alarm system, and other computer systems running. Also, the weather can cause battery hazards. Suppose you leave your car in hot weather. What will happen? The battery will continue to drain and die at some point.

What to Do if Your Battery Is Dead?

What should you do if your car battery dies? If your car battery dies due to prolonged sitting, you can try jump-starting to start the car. This method is very effective for long-sitting cars and dying batteries. But what if this method doesn’t work?

Then all you can do is completely replace your car battery. Or, check if the car’s alternator is faulty. More you can do is call an experienced mechanic to fix your problem.

How to Store a Car Battery?

Car batteries are expensive and this is why most of the time losing batteries is annoying and expensive for you. To avoid all these hassles, you need to know how to store your car battery properly. If you find that you are leaving your car for a long time, disconnect the battery from the car and keep it separate. There are other things you can do to save your car battery:

  • Always make sure that your car battery is fully charged. This is what you need to do when using the car and when leaving the car. It will prolong the battery life.
  • Cleanliness is a part of faith. In this case, you should keep this in mind too. You need to clean the car battery regularly. You need to clean the electrolyte and corrosion buildups. Failure to do so may result in corrosion of the battery terminals. You can easily clean the battery by mixing baking soda with water and rubbing it with a brush. However, after cleaning, wipe the battery completely with a clean rag.
  • Check your car battery regularly for any possible damage. Because the damage is deep and you didn’t notice- will be a nuisance for both you and your car.
  • Regular battery recharge means you are giving the battery extra life. Monitor the battery regularly. Check the battery as often as possible. With a voltmeter, you can check the voltage of your car battery.
  • If you do not want to use your car for a long time, store both the car and the battery properly. It is best to keep the battery separate from the car. The main reason behind a battery being discharged is the weather. Store your car battery in a dry, clean, well-ventilated place. The temperature at which place the battery will be stored should be 4.44-15.56 degrees Celsius. The place should not be too hot or too cold and excessively humid.

Frequently Asked Question

1. How do you charge your car battery?

You need to connect the charger to the cigarette lighter. Once connected, attach the lead from the charger to one of the negative terminals on your car battery and connect the lead from other terminals on the battery charger to another negative terminal on a car or a dedicated powerpoint. The voltage output should be 12 volts DC with an amperage range of 1-20 amps while charging.

2. Can you use a lead-acid battery on a car that doesn’t have one?

Lead-acid batteries cannot be used in cars without a dedicated battery box.

3. I’ve had my battery checked and it looks fine but the car won’t start. What could be the problem?

Several problems can cause a car not to start, including a dead or weak battery, an incorrect alternator output voltage, corroded connections on your alternator or starter motor cables, and worn-out spark plugs.

4. How can I tell if my car battery is expired?

Expired batteries will have a reduced capacity and may show reduced performance in terms of starting your car, idling smoothly, or having a longer range.

How Long Can a Car Sit Without Being Driven?


In conclusion, if your car has a battery, be sure to follow the battery care instructions that came with it. If you don’t have the instructions, or if you’re not sure what they are, consult your dealer or search online for battery care instructions. If the car’s battery is not working properly, the best course of action is to bring it in for service.

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