This has been discussed numerous times. One person said model number starting with EP confirms East Penn. I called EP this morning. They supply batteries to my local Walmart but said model number starting with EP is not confirmation. You have to see manufacturing sticker stating battery is manufactured by EP. They also said they do not modify/cheapen batteries to meet Walmart price demands.
I gave up on JC (Interstate) batteries decades ago because they always leaked at the posts causing a corrosive mess. Never had a peep of trouble from an EP battery.
I gave up on JC (Interstate) batteries decades ago because they always leaked at the posts causing a corrosive mess. Never had a peep of trouble from an EP battery.