I'm thinking of changing batteries since they came with a boat. Thinking it's somewhat cheap and easy fix just to be sure that I have full power to run the boat and start the engine. I'm hoping to do it my next day off so I'm wondering what people have as a battery setup or recommendations. This is hunter 27 1981. I have battery plus, walmart, and West Marine as my choices around me. Again, I'm trying to do the swap on my day off so not planning on ordering online. Does everybody just have one starter and one deep cycle? And which type would be good for both? Thanks