Optimas are garbage. Every single one we get in here is dead, they won't take charges. I've cored every one, no matter what color. I don't know why people waste they're money.
I get TONS of batterys in here. I see 45-55 cars per month. Most of the ones that we resell are Interstate, AC Delco, Motorcraft, Die Hard. Duralasts are 50/50....some are good, while others won't hold a charge. We only sell batteries that are hot and tested.
Many offbrand batteries are junk. They rarely take a charge, let alone hold one.