AutoZone will test your battery for free and charge it at no cost if the battery is still good
AutoZone offers a no-charge battery test and charging service at most of their locations. If your battery is dead but not damaged, they will charge it while you wait—you pay nothing. If the test shows the battery cannot hold a charge, they will tell you that and you can decide whether to buy a replacement or take it elsewhere.
This service exists because a dead battery is often a temporary problem: a light left on, a long period of not driving, or a weak alternator that didn't fully recharge the battery. Charging it may solve the problem. AutoZone makes money when you buy a new battery if the old one is truly worn out, so they have no reason to charge you for the test or the charging itself.
Key Takeaways
- AutoZone tests and charges batteries at no cost at most locations, but you should call ahead to confirm your store offers the service.
- The test takes about 15 minutes and tells you whether the battery is good, weak, or dead and cannot be recovered.
- If your battery is charged and still fails to start the car, the problem is likely the alternator, starter, or wiring, not the battery itself.
- You do not need to buy anything to use the service—walk in, ask for a battery test, and they will do it.
What happens during a free AutoZone battery test
When you bring your car to AutoZone, tell an employee you want a battery test. They will ask you to pop the hood and connect a device called a battery load tester to your battery terminals. This device measures how much electrical current your battery can deliver under load—the real test of whether it works.
The test takes about 10 to 15 minutes. The tester will show a reading: good, weak, or bad. A good battery holds its charge and can start your engine. A weak battery may start the car on a warm day but fail in cold weather or after sitting unused. A bad battery cannot be recovered by charging and needs to be replaced.
If the test shows the battery is weak or dead, AutoZone will offer to sell you a replacement. Their batteries come with a warranty—typically three to five years depending on the type—and they will install it for free if you buy it there. You can also take the test results to another shop or buy a battery elsewhere.
When AutoZone will charge your battery for free
If the test shows your battery is good but discharged, AutoZone will charge it at no cost. They use a battery charger that slowly restores the charge over 30 minutes to an hour, depending on how dead the battery is. You can wait in the store or leave and come back.
A charged battery should start your car. If it does not, the problem is not the battery—it is the alternator (which charges the battery while the engine runs), the starter motor, or corroded or loose wiring. At that point, AutoZone can test the alternator for free as well, but you will need to take the car to a mechanic or dealership to have it repaired.
Why your battery died in the first place
A dead battery usually has one of three causes. The most common is leaving a light, the radio, or the interior lights on while the car is parked. The battery drains over hours or days. Charging it will fix the problem, and it will not happen again unless you repeat the mistake.
The second cause is a weak alternator. The alternator is a generator that runs off the engine and recharges the battery while you drive. If it is failing, the battery does not recharge fully, and eventually it runs out of power. A charged battery will start the car, but it will die again after a few days of driving or sitting idle. You will need the alternator tested and replaced.
The third cause is a battery that has straightforward worn out. Car batteries last three to five years on average. As they age, they hold less charge and fail more easily in cold weather. If AutoZone's test shows the battery is bad, or if you charge it and it dies again within a few days, the battery itself needs to be replaced.
How to find an AutoZone location near you
AutoZone has over 6,000 locations in the United States, Mexico, and Brazil. You can find the nearest store by visiting their website and entering your zip code, or by calling 1-800-AutoZone (1-800-288-6966). Not every location offers the same services, so call ahead to confirm that your store does battery testing and charging.
Some AutoZone locations are busier than others. If you go on a Saturday afternoon, you may wait 30 minutes or longer. Weekday mornings are usually faster. If you are in a hurry, call the store first and ask how long the wait is.
What to bring and what to expect
Bring your car keys and your vehicle. You do not need to buy anything, and you do not need an appointment. Walk in, ask for a battery test, and an employee will help you. The entire process—test and charging if needed—usually takes 30 minutes to an hour.
Wear clothes you do not mind getting dirty. Battery terminals can have corrosion on them, and the charger cables may leave marks. If the terminals are heavily corroded (white, blue, or green crusty buildup), AutoZone can clean them for free as well. Corroded terminals can prevent a good battery from working properly, so cleaning them is worth doing.
What to do if the battery test shows it is bad
If AutoZone's test shows the battery cannot be charged and needs to be replaced, you have options. You can buy a battery from AutoZone and have them install it for free. You can buy a battery from another retailer—Walmart, Costco, a tire shop, or a dealership—and have them install it. You can also buy a battery online and install it yourself if you are comfortable doing so.
Battery prices vary by type and brand. A basic battery for a sedan costs between $80 and $150. A premium battery or one for a larger vehicle costs more. AutoZone's warranty covers defects, but not damage from misuse or neglect. Read the warranty terms before you buy.
Frequently Asked Questions
Do I have to buy a battery from AutoZone if they test it?
No. The test is free whether you buy from them or not. You can take the test results to another shop or retailer. However, AutoZone will install a battery for free if you buy it from them, which saves you labor costs elsewhere.
What if my car won't start even after AutoZone charges the battery?
The problem is not the battery. Ask AutoZone to test your alternator—they do this for free as well. If the alternator is good, the issue is likely the starter motor or corroded wiring, and you will need a mechanic to diagnose and repair it.
How long does a charged battery last?
If the battery is good, it should hold a charge for weeks or months if the car sits unused. If it dies again within a few days of normal driving, the alternator is not charging it properly and needs to be tested or replaced.
Can AutoZone test my battery if it is still in the car?
Yes. The test is done with the battery connected to the car. You do not need to remove it. The employee will connect the load tester to the battery terminals under the hood.
Is there a charge for cleaning corroded battery terminals?
No. If your battery terminals have corrosion buildup, AutoZone will clean them for free as part of the service. Corroded terminals can prevent a good battery from working, so this is a useful step.