Optima battery??..

I wouldn't listen to me if I were you, but if I was I'd add a second battery and an isolator.

When one battery starts to act up, swap them and replace the more worn one when convenient.

Standard batteries got stupid expensive about 10 years ago, so I'm not sure if a two battery setup would be cheaper or not (no clue how optolimas are anymore either) but it would definitely be more flexible and I like flexible.