Duralast is only sold at AutoZone as Duralast is an AutoZone brand.
Duralast parts are made by Johnson Controls and also East Penn, Exide, and other manufacturers).
Duralast Platinum is an AGM line of batteries.
Duralast Auto Parts are good auto parts and I've had no issues with them myself.
However just like any other auto parts they can be either good or bad depending on the part.
Duralast does meet or even exceed OE performance for every part.
Duralast is an AutoZone brand.
Valucraft, Duralast, and Duralast Gold are AutoZone's private label brands for lead-acid automotive batteries (manufactured primarily by Johnson Controls, but also East Penn, Exide, and other manufacturers).
AutoZone is an aftermarket parts supplier although AutoZone can also get OEM parts and sometimes they stock popular OEM parts for sale.
AutoZone is owned by the Vanguard Group Inc.
The Vanguard Group, Inc owns AutoZone although other companies hold a stake in AutoZone as well.
AutoZone is the largest Auto Parts store in the US which is a retailer of aftermarket automotive parts and accessories.
AutoZone was founded in 1979 and has 7,140 AutoZone stores across the United States, Mexico, Puerto Rico, Brazil and teh US Virgin Islands.
AutoZone is based in Memphis Tennessee.
The best place to buy auto parts online is RockAuto, eBay, Partsgeek.com and Amazon.com
These are the places where I buy my auto parts from.
Most auto parts I buy from eBay although sometimes I can only find the auto parts I need at RockAuto, Amazon or Partsgeek.
You can get most auto parts online cheaper than you can in an auto parts store.