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# Continental
# Exide
# Johnson Controls
Most auto batteries are made by just three manufacturers, Delphi, Exide, and Johnson Controls Industries. Each makes batteries sold under several different brand names. Delphi makes ACDelco and some EverStart (Wal-Mart) models. Exide makes Champion, Exide, Napa, and some EverStart batteries. Johnson Controls makes Diehard (Sears), Duralast (AutoZone), Interstate, Kirkland (Costco), Motorcraft (Ford), and some EverStarts.
Napa batteries have been made by Deka since early 2009. They make great batteries. At our Napa store, the defect rate is 75% less than when Exide was supplying us.
Johnson Controls does not sell car batteries under their own name, it's all private-label.
NAPA batteries are made by East Penn Manufacturing and these are good batteries for the price.
Most aftermarket car batteries sold in the U.S. are made by three companies that build them for retailers: Johnson Controls, which supplies more than half of the market; Exide; and East Penn. They are sold under various names and built to the specifications of retailers, so performance can vary. Most stores will test, install, and match a battery to your car?s needs. Here are the major brands and where they are sold.