alittle info i found on the interenet
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A little Background on the Kirkland Brand Car Batteries[/h] The Kirkland Signature Car Batteries are manufactured by
Johnson Controls. Johnson Controls also manufacturers what is probably the best brand battery you can buy for your car (And also available at most Costco’s) the Optima® brand of batteries. They make the LTH and Heliar brands for South American Markets. Johnson Controls also
makes the Duralast/DL-Gold batteries at Autozone. I am currently running a 7 year old Kirkland Battery in one of my cars and its still going strong. My other car has a Kirkland Battery that is now 4 years old and no problems. I accidently left the dome light on in the car with the 4 year old battery draining it completely down. I put it on the charger and got it back to a full charged state. And it’s been about a month now and no issues.