In the past I'd only seen O'Reilly batteries made by East Penn or Clarios(part number end in J) , but my neighbor just got a new battery and I was helping him refill his aircon that has a slow leak, and I notticed his new battery was a SuperStart Premium that's made in Korea, I think that may be a Hyundai-Sungwoo/Enercell battery because the handle design is different than the AtlasBX made Delco he had in there before.