I have two H8 batteries from my boat sitting in my shed. Walmart Platinums that are perfectly good. My 2014 2500HD 6.0l Vortec is showing some struggle in it's crank and I am adding a 3000w inverter in the back bed. Since I'm finishing up running the wiring tomorrow wondering if I can just replace the batteries with my two H8. I'm sure someone could go say "go look" but they're heavy as hell and right now it's super muddy as we're having hurricane level storms so I can't get outside just yet.