i know when they 1st came out many years ago they were great. red tops for years. but they move production of the red tops and had major quality issues. but the blue and yellow were made somewhere else and kept the quality. but that was a long time ago when i got my blue tops. i have read several years ago that the quality and the follow through with warranties have been much better. some issues had to do with how AGM had to be maintained.
i am not sure how things are in the last few years. i would just switch to a more stable reputable battery but i dont think they would fit the holders that are welded in.
if not optima, what are you running?