I use my Polaris Ranger EFI 570 (with power steering) to launch and retrieve my boats. The Ranger came equipped with a Yuska 300cca wet battery. Test loads on it were ok, but it just barley spins the engine (slow starting). I ordered a Renegade 30A AGM which as 500cca. Man what a difference. Never heard of Renegade, but my neighbor has one. He sold me on it. I thought I would share this and I can always find what I did on Juneteenth 2018 in the archives here (maybe).