I must be doing something wrong. I've used the Optima Group 51 yellow top on three builds. All have been rock solid. Current one in #8674 is 4 years old. Don't touch it during driving season. During winter storage, I throw my CTEK charger on it every month or two. Does a diagnostic and tops it off. Last time was a couple weeks ago and it was fine.

Some kind of charge issue if a battery is swelling up. Drain after two weeks I'd be looking for parasitic draw. In either case, if the battery is really defective, they do have a 36 month replacement warranty. Not saying the Optima AGM's are the best and they certainly aren't the cheapest. But IMO there has to be more to the story for some of what's being reported.