Johnspon Controls makes the Walmart Everstart batteries. I called JC and asked if they made true deep cycle batteries for WM. They said the ones with the letters DC in the Everstart battery number were deep cycle Even though they listed CCA. They said the ones with MS in the Everstart number were hybrid Marine starting batteries.
Advance Auto Parts uses DC vs M on their battery part nos.
I bought a pair the Advance Auto group 24 deep cycles because they list a higher reserve capacity on their beep cycle batteries. I haven't confirmed it yet.
These are the ones I bought to fit the trailer tongue.
Advance Auto Deep Cycle Marine/RV battery part no. 24DC-1. This is their Marine starting battery.
Advance Auto Deep Cycle Marine starting battery part no. 24M-1