Read your manual for specifics on battery CCA and type. I read on The Hull Truth that someone says the manual says NOT to use deep cycle batteries and NOT to use wing nuts !!

You can read what was said here : https://www.thehulltruth.com/boating...uirements.html

And this comes from a Bass Boat Magazine post : OptiMax Models
2.5L/3.0L
1000 Marine Cranking Amps (MCA) or 750 Cold Cranking AMPS (CCA)