Duralast batteries are made primarily by Clarios LLC, the world’s largest automotive battery manufacturer, for exclusive sale through AutoZone stores across the United States.
Duralast is AutoZone’s flagship private-label battery brand, covering more than 110 battery configurations across standard flooded, enhanced flooded, and AGM chemistries to serve passenger vehicles, trucks, marine applications, and heavy-duty equipment.
AutoZone, Inc. (NYSE: AZO), headquartered in Memphis, Tennessee, does not manufacture batteries itself; it operates as a retailer and contracts with Clarios as its primary supplier, with East Penn Manufacturing also confirmed as a secondary source for certain Duralast configurations.
Knowing who makes Duralast batteries helps buyers evaluate whether they are getting a product from a reputable manufacturer or simply a store-brand label with uncertain origins.
This article covers the confirmed manufacturers behind Duralast, the product tiers available, how Duralast compares to EverStart, and what buyers should know about choosing the right battery for their vehicle.
So let’s get started.
Table of Contents
Who Makes Duralast Batteries?
AutoZone sources its Duralast batteries primarily from Clarios LLC, a Glendale, Wisconsin-based company that is the world’s largest automotive battery manufacturer.
According to the Safety Data Sheets AutoZone provides with its Duralast batteries, Clarios is identified as the manufacturer for the majority of configurations sold under the Duralast name. East Penn Manufacturing, based in Lyon Station, Pennsylvania, is also confirmed as a secondary supplier for certain Duralast variants.
Clarios was formed in 2019 when Brookfield Business Partners acquired the Power Solutions division of Johnson Controls for $13.2 billion. The company traces its battery manufacturing heritage back to 1885 in Milwaukee and today produces over 150 million low-voltage batteries annually across more than 50 facilities worldwide. Its brands include Optima, VARTA, Delkor, and DieHard, in addition to private-label products for retailers including AutoZone.
AutoZone does not publicly disclose its supplier agreements, but the Safety Data Sheet identification method, combined with decades of consistent industry reporting, confirms Clarios as the dominant source for Duralast batteries. AutoZone maintains product information for its Duralast line at duralastparts.com, where battery specifications and warranties are published for each configuration.
What Are the Duralast Battery Tiers?
Duralast batteries are sold in four product tiers that cover different performance levels and vehicle requirements. The standard Duralast is the entry-level option, carrying a two-year free replacement warranty and suited to basic transportation needs with a price point around $159.
The Duralast Gold is the mid-tier option with a three-year warranty, enhanced vibration resistance, and improved performance for vehicles with moderate electrical demands.
The Duralast Platinum EFB (Enhanced Flooded Battery) is designed for vehicles with mild hybrid or start-stop systems that require more cycle durability than a standard flooded battery can provide.
The Duralast Platinum AGM is the top tier, built for vehicles factory-equipped with AGM batteries including those with advanced driver assistance systems, heated and cooled seats, and premium audio equipment. The Platinum AGM H6 carries a four-year warranty, is rated at 760 cold cranking amps, and holds a 4.8-star rating from thousands of customer reviews on AutoZone’s website.
Buyers should match the correct tier to their vehicle’s factory specification. Installing a standard flooded battery in a vehicle that requires AGM can damage the vehicle’s battery management system and may void warranty coverage on related electronics. The vehicle’s owner’s manual or AutoZone’s battery lookup tool by VIN number identifies the correct specification.
Who Is Clarios and Why Does It Matter?
Clarios is not a household name to most consumers, but it is the company behind many of the most recognized battery brands on automotive shelves. In addition to Duralast, Clarios manufactures DieHard batteries for Advance Auto Parts, Motorcraft batteries for Ford dealerships, AC Delco batteries, and the premium Optima brand sold at multiple retailers. According to Clarios’s official website, the company powers one in three vehicles on the road globally, giving it an unmatched manufacturing footprint in the automotive battery industry.
This means that a Duralast Platinum AGM purchased at AutoZone and a DieHard Platinum AGM purchased at Advance Auto Parts may come from the same Clarios production facility, built to similar specifications but sold under different brand names and retailer warranty programs. The primary differences are the brand name, the specific performance spec each retailer negotiates, and the pricing and warranty terms.
For buyers who want to understand the full landscape of who produces the batteries they buy, knowing that Clarios sits behind multiple competing store brands is the most important piece of information. It means the manufacturing quality of Duralast at its premium tiers is the same as several more brand-recognizable alternatives.
Duralast vs. EverStart: Which Is Better?
EverStart batteries, sold exclusively at Walmart, are manufactured by Clarios as well, making them another private-label battery brand from the same production origin as Duralast. At comparable tiers, EverStart and Duralast draw from the same Clarios manufacturing network, meaning quality differences between them are largely a matter of the spec each retailer negotiated rather than a difference in underlying production standards.
The practical differences for buyers come down to price, availability, and warranty service. EverStart batteries are often priced slightly lower than Duralast at comparable tiers, reflecting Walmart’s focus on price leadership. Duralast carries slightly more aggressive warranty terms at some tiers and benefits from AutoZone’s specialized automotive staff who can assist with installation and disposal of the old battery in a way that general Walmart associates cannot always match.
For most buyers, the decision between Duralast and EverStart at equivalent specifications is a matter of which store is more convenient and which retailer offers the better price on the day of purchase, rather than a meaningful quality distinction. Both are Clarios products at their premium AGM tiers. For more on store-brand automotive batteries, see Who Makes EverStart Batteries and Who Makes Napa Batteries.
Frequently Asked Questions About Duralast Batteries
Are Duralast batteries good quality?
Yes. Duralast batteries at the Gold, Platinum EFB, and Platinum AGM tiers are manufactured by Clarios, the world’s largest automotive battery maker. The Platinum AGM in particular earns strong consumer reviews and is backed by a four-year warranty, making it a competitive option against higher-priced alternatives.
Where are Duralast batteries sold?
Duralast batteries are sold exclusively through AutoZone stores and at autozone.com. They are not available at other auto parts retailers, which is standard practice for store-branded private-label products.
Does AutoZone make Duralast batteries?
No. AutoZone does not manufacture any products. Duralast batteries are produced by Clarios and East Penn Manufacturing under private-label arrangements with AutoZone, which handles retail distribution, branding, and warranty administration.
What is the best Duralast battery?
The Duralast Platinum AGM is the best tier for vehicles that require AGM batteries, offering a four-year warranty and Clarios’s premium AGM construction. For standard vehicles that specify a conventional flooded battery, the Duralast Gold provides solid performance at a lower price point with a three-year warranty.
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.