Almost all of the standard wet cell batteries reguardless of brand or what store you buy them from are made in the same plant by the same people, machines and process as all the others. Continental, walmart, motorcraft, A/C delco diehard, etc. are the same battery with a dif label.
AGM, optima etc are different.
Go down to walmart and buy an everstart max of the correct size and don't worry about it.
Partially right. Walmart, Interstate, Delco and some others are all made by JCI (Johnson Controls). Not sure who makes Motorcraft, Continental is it's own company. Diehard are made by several different people, depending on the battery. EastPenn (Deka) and JCI both share in making the Diehards.