Something to keep in mind:

The majority of car batteries are created by 3 manufacturers - Delphi,
Exide and Johnson Controls Industries. Delphi makes some EverStart
models sold in Walmart and ACDelco. Johnson Control Industries makes
Duralast seen in Autozone stores, Diehard - sold in Sears, Kirkland -
the Costco brand, Motorcraft - which Ford sells, some of the EverStarts,
and Interstate. Exide makes Exide batteries, Champion, Napa and even a %
of the EverStart batteries.

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