How Long Does a Car Battery Last Without Driving or Charging?
Table of Contents
- How Long a Car Battery Lasts Without Driving
- What Can Drain a Car Battery When the Car Is Off?
- How to Save a Car Battery When Not in Use
- How to Keep a Car Battery Charged When Not in Use
- Steps to Take if a Car Battery Is Dead
- How Much Replacing a Car Battery Costs
- How to Jump-Start Your Car With Cables
- How to Know When a Car Needs a New Battery
- Car Insurance Resources
- FAQ
With typical driving, a car battery usually has a lifespan of three to five years before you need to replace it. But what if you park the car and just leave it there? How long would the car battery last without driving or charging?
Read on about the various scenarios to help you gauge how often you may need to start your car to prolong its battery life.
Key Points
• A car battery can die in as little as one month if it’s not charged or the car isn’t driven.
• Battery lifespan is influenced by age, type, and electrical issues, such as bad cables.
• Problems holding a charge, an unpleasant smell, and a bulging battery case are signs that your battery needs replacement.
• A new battery can cost between $90 and $200 if you do it yourself, while a mechanic may charge you an additional $45 to $250.
• Some car insurance policies offer roadside assistance options if your battery happens to die.
How Long a Car Battery Lasts Without Driving
Although no two vehicles or batteries are exactly the same, you can make an estimate. If you’re wondering how long a car battery typically lasts when the vehicle sits idle, here are some broad averages.
Although many things wear down with use, a car’s battery can die within four weeks to two months if it’s not used. Here’s why. Your car battery takes chemical energy and transforms it into electrical energy when you start the ignition. That electricity then powers the radio, clock, and other accessories.
When you park your car for an extended period, the battery can die — meaning it loses its charge and stops working.
As for how long an electric car battery lasts, the answer is around a few months, depending on certain factors. Electric cars are fueled solely by electricity stored in the battery. Teslas, for example, are all-electric. If the battery is in good shape and fully charged, it may take up to three months to lose power, losing 1% per day.
Then there are hybrid cars, which are fueled by a combination of electricity and gasoline. How long a hybrid car battery lasts when not in use depends on the battery. Vehicles with 12-volt batteries may drain more quickly (in one month) than other kinds. See your owner’s manual for guidance.
Recommended: Does Auto Insurance Roadside Assistance Cover Keys Locked in a Car?
What Can Drain a Car Battery When the Car Is Off?
Older batteries won’t hold their charge as long as new ones, but there are many other reasons for a battery to drain faster:
• Electrical problems, such as bad cables, blown fuses, and spark plugs
• Corrosion on the battery
• Alternator problems
• The charging system itself
If you suspect one of these issues, look into saving on car maintenance costs.
How to Save a Car Battery When Not in Use
Using your car lets it convert chemical energy into electrical energy. If your car will be sitting idle for a while, it’s a good idea to take it out for a 30-minute drive once a week to allow the battery to recharge.
Simply turning the ignition on and off isn’t enough, and it may even cause more harm than good. If you’ve got two cars at home and use one as your primary vehicle, consider using the other one more often.
Recommended: How to Lower Your Car Insurance
How to Keep a Car Battery Charged When Not in Use
To keep your batteries in good shape when not in use, consider using a trickle charger. These devices, which remain attached to the car, recharge the battery at the same rate that it typically drains. There are different types of chargers, so make sure you get the right one for your car model and learn how to use it.
Steps to Take if a Car Battery Is Dead
If you accidentally leave the lights on (or some other accessory), you probably just need to juice up the battery again.
When there’s no obvious reason for a drained battery, check for corrosion on the terminals that connect the car battery to the charging system. If you see white deposits, try brushing the ashy material off with a wire brush and baking soda.
If the first two scenarios don’t apply, you may have a defective battery or other faulty or worn-down parts, such as a battery cable, terminals, or alternator. In that case, you’ll need the parts repaired or replaced.
How Much Replacing a Car Battery Costs
If you go the DIY route, a new battery can cost between $90 and $200. If you hire a mechanic to have the work done instead, it may cost an additional $45-$250, depending on the make and model and the mechanic’s rates. However, that price can skyrocket if you’re dealing with a hybrid car battery, which can run anywhere from $2,000 to $8,000.
Keep in mind that battery replacement and other routine car maintenance costs aren’t covered by car insurance. To learn more, check out these insurance tips for first-time drivers.
How to Jump-Start Your Car With Cables
When you jump-start your car, you use the power from another car battery to give yours a jump to get it running again. (If a jump start doesn’t work, you probably need a new battery.)
First, park the two cars close together, turn them both off, and open the hoods. Take out your jumper cables and untangle them. Hook one red/positive clamp to the positive terminal of the battery that needs a charge. Then, attach the other red clamp to the working battery’s positive terminal.
Take the black/negative clamp and connect it to the negative terminal of the working battery. Attach the other black/negative cable end to a surface on the car with the dead battery — somewhere that’s metal and unpainted.
Start the working car, and then try starting the other car. Turn off the working/jumper vehicle. Carefully remove the cables in the reverse order that you attached them. Let the car with the newly charged battery run for at least 15 minutes.
Some insurance policies cover jump starts as part of their roadside assistance option. When deciding how much car insurance you need, weigh the cost of this extra against the added convenience.
How long the battery charge lasts can vary. If it dies again, have your battery checked to see if it needs replacement.
How to Know When a Car Needs a New Battery
Here are some signs that your car battery may need replacement:
• The battery no longer holds a charge for long.
• Your car doesn’t start as easily as it used to or shuts down after starting.
• The battery smells bad.
• The battery case is swollen or bulging.
• It’s been a while since you replaced it. (A good rule of thumb is to refresh the battery every three to five years.)
Car Insurance Resources
As mentioned above, some car insurance policies offer roadside assistance options. The next time you’re sitting down for a personal insurance planning session, consider the pros and cons of these kinds of extras.
To find the best rates you’re eligible for, shop around on an online insurance marketplace.
The Takeaway
How long a typical car battery lasts depends on factors such as how often you drive your car or charge the battery, how old the battery is, and the type of battery you use. That said, a new car battery should last about four years on average. The cost of a new battery can be as little as $90 if you replace it yourself. Otherwise, a mechanic may charge you hundreds of dollars more. Keeping your battery free of corrosion may extend its life and protect your investment.
When you’re ready to shop for auto insurance, SoFi can help. Our online auto insurance comparison tool lets you see quotes from a network of top insurance providers within minutes, saving you time and hassle.
SoFi brings you real rates, with no bait and switch.
FAQ
How long does a car battery last without charging?
A car battery can last around four years if you’re regularly using the car. If you leave the lights on or park the car for an extended period, then it may need charging before you can drive it. A trickle charger can help maintain the battery in a car that’s in storage.
How often do you need to start your car to keep the battery from dying?
A car battery can often stay in good shape for a month even when you don’t drive the vehicle. However, if you want to make sure the car is ready to use in case of an emergency, take it for a 30-minute drive once a week.
How long can a car last on just the battery?
If your alternator fails when you’re on the road, you may still be able to drive on just the battery. The amount of time you have before your car dies depends on a number of factors, including how much charge your battery has. Of course, it’s best to get the alternator repaired or replaced as soon as you can.
Photo credit: iStock/Fernando rodriguez novoa
Auto Insurance: Must have a valid driver’s license. Not available in all states.
Home and Renters Insurance: Insurance not available in all states.
Experian is a registered trademark of Experian.
SoFi Insurance Agency, LLC. (“”SoFi””) is compensated by Experian for each customer who purchases a policy through the SoFi-Experian partnership.
Third-Party Brand Mentions: No brands, products, or companies mentioned are affiliated with SoFi, nor do they endorse or sponsor this article. Third-party trademarks referenced herein are property of their respective owners.
Financial Tips & Strategies: The tips provided on this website are of a general nature and do not take into account your specific objectives, financial situation, and needs. You should always consider their appropriateness given your own circumstances.
SOPRO-Q126-059
Read more