Thanks guys, I grabbed 2 more FPV deep cycle and a starting battery. I forgot about the 11% off Menards has going on right now. It’s a no brainer at that price.
I’ll let you know how they work out.
On the old FVP’s I just ran the stereo for an hour with no problems while I was cleaning it up. I have a 200w kenwood and and a 200w sony head unit, plus a 9 inch SIMRAD SONAR/RADAR plotter.