The Texan wrote:
To make a blanket statement that Costco GC-2 is a Johnson Control battery is misleading. Around our neck of the woods and as far south as AZ, they are mostly Interstate batteries with a variant thrown in once in awhile.
Interstate is Johnson Controls, but Costco buys from both them and US-Battery and possibly other companies. (not sure) sometimes the battery is re-branded, sometimes not, all depends. Same with Sams. but emphasis there on "I do not know" the name of the primary supplier.
There are really only a few battery makers in the US. But rather than make a fool of myself, I won't post a list.
Johnson makes a lot of "3rd party" (Store brand) batteries.