I have read that Optima has changed hands (maybe more than once) and that their quality has slipped significantly.

www.diymobileaudio.com/threads/optima-batteries-decrease-in-quality.457537/
https://bobistheoilguy.com/forums/threads/optima-batteries-who-makes-them.190550/


This guy likes his Optima, but the comments are less positive:

www.youtube.com/watch?v=7EjkzZd1_5M

What are Mopart member's experiences with the Optima's the last few years?

Master, again and still