Brian Latimer as long as your using a modern Mercury 4 stroke you will be fine. Mercury upgraded the regulator in recent years and now prefer the AGM battery for the 4 stroke. I didn’t know any of this either, but my mechanic guy gave me a master class the other day.
Replied on So hopefully I can help someone else ...
22 Nov 06:59
Hey Jayden, this is the one I went with. I don’t have a big battery storage area so I couldn’t go with two regular size in parallel with each other. So I went with the biggest size I could. Even though it melted the regulator, I had plenty of power to run graphs and livewll all day long.
https://www.batteriesplus.com/productdetails/sli31agmdpm