AutoZone branded batteries are made by Clarios LLC and East Penn Manufacturing, the two major lead acid battery manufacturers that build AutoZones exclusive Duralast battery line.
AutoZone does not manufacture its own batteries in house.
Instead, the Duralast name is AutoZones private label brand, covering more than 110 battery configurations built to AutoZones own specifications by these outside manufacturers.
Clarios, formerly the battery division of Johnson Controls, is one of the largest automotive battery manufacturers in the world, while East Penn Manufacturing is a large family owned lead acid battery producer based in Pennsylvania.
Both companies supply batteries to multiple retail chains under different private label names, and AutoZone splits its Duralast production between them to maintain supply reliability across its thousands of stores.
More background on the Duralast brand and its manufacturers is available in our full guide to who makes Duralast batteries.
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AutoZone Battery Brands Explained
When customers ask about autozone batteries, they are almost always referring to the Duralast line, since Duralast is the exclusive battery brand sold at AutoZone locations.
Duralast batteries come in multiple tiers, including standard flooded batteries and higher performance Duralast Gold and Duralast Platinum AGM models, all built by the same core group of manufacturers.
Why AutoZone Uses Outside Manufacturers
Lead acid battery manufacturing requires heavy industrial infrastructure, including lead smelting, recycling, and casting operations, along with strict environmental compliance.
Rather than build and operate its own battery plants, AutoZone contracts with Clarios and East Penn, both of which already operate large scale manufacturing networks across the United States, letting AutoZone focus on retail operations while outsourcing the industrial side of battery production.
This is standard practice across the auto parts retail industry, documented by trade groups such as the Battery Council International, which tracks lead acid battery manufacturing and recycling trends nationwide across thousands of retail locations in North America.
AutoZone Battery Tiers And Technology
Standard Duralast batteries use conventional flooded lead acid technology suited to everyday vehicles, while Duralast Gold batteries offer improved cold cranking amps and a longer warranty, making them a popular upgrade choice for drivers in colder climates where starting power matters most during winter months.
Duralast Platinum AGM batteries are built for vehicles with start stop systems and heavier electrical loads, using absorbent glass mat construction for better vibration resistance and a longer service life compared to standard flooded designs.
Reserve capacity and cold cranking amp ratings on all three tiers follow standard industry testing methods, which the SAE International helps define for automotive battery manufacturers, giving shoppers a consistent way to compare specifications across brands and tiers before buying.
AutoZone Battery Replacement And Testing
AutoZone offers free battery testing and installation at most store locations, checking cold cranking amp output and overall battery health before recommending a replacement, a service that many drivers rely on when they notice slow cranking or dimming headlights.
This service has helped make autozone battery replacement a common search term among drivers dealing with a slow starting vehicle.
Technicians typically test both the battery and the alternator during this process, since a failing alternator can sometimes be mistaken for a dying battery, and confirming the actual cause avoids buying a replacement battery that will not fix the underlying problem.
Most AutoZone locations can complete a battery swap in well under an hour, and many stores also offer core exchange credit when customers turn in their old battery for recycling, which helps offset the cost of the new battery while keeping used lead acid batteries out of landfills.
Quality And Trustworthiness Of AutoZone Batteries
Because Duralast batteries are built by Clarios and East Penn, two of the most established lead acid battery manufacturers in the industry, AutoZone batteries carry a manufacturing pedigree comparable to many name brand competitors.
AutoZone backs its batteries with tiered warranties depending on the specific Duralast model, and the companys free testing service gives customers a straightforward way to confirm whether a battery actually needs replacing before spending money on a new one.
Warranty length typically increases with battery tier, so a base Duralast battery may carry a shorter free replacement period than a Duralast Gold or Platinum model built for higher performance vehicles.
AutoZone Batteries Vs Other Retail Battery Brands
Compared to EverStart at Walmart and Super Start at O Reilly, which are also built by Clarios and East Penn among other manufacturers, AutoZones Duralast lineup competes on similar cold cranking amp ratings and warranty terms.
The main differences shoppers notice come down to store location, price, and specific tier availability rather than a dramatic gap in underlying battery technology, since most retail automotive battery brands are ultimately built by the same small group of manufacturers.
For readers researching other retail battery brands, our guide to who makes EverStart batteries covers a similar manufacturing pattern in more detail.
Where To Buy AutoZone Batteries
AutoZone batteries are sold exclusively at AutoZone retail locations and through the AutoZone website, with same day availability at most stores.
Unlike some competing battery brands, Duralast batteries are not distributed through other retailers, which is one way to identify a genuine AutoZone battery versus a similar looking model sold elsewhere.
AutoZones full store locator and current inventory details are available on the AutoZone website.
Frequently Asked Questions About Who Makes AutoZone Batteries
Does AutoZone make its own batteries?
No.
AutoZone batteries are built by outside manufacturers, primarily Clarios and East Penn Manufacturing, under AutoZones exclusive Duralast brand name.
What is the difference between Duralast and Duralast Gold?
Duralast Gold batteries generally offer higher cold cranking amps and a longer warranty than standard Duralast batteries, while using similar core lead acid technology from the same manufacturers.
Does AutoZone test batteries for free?
Yes.
Most AutoZone locations offer free battery and charging system testing, along with free installation on batteries purchased in store.
Are AutoZone batteries good quality?
AutoZone batteries are built by established lead acid manufacturers with decades of experience, giving Duralast batteries a quality standard comparable to many other major retail battery brands sold nationwide.
I am Jack Neel, a mechanical engineer, researcher, and writer. I created this website to share my knowledge about different brands and products with you. I research the manufacturers behind the brands and provide you with the information you need to make smart buying decisions.