I have been using Optima Bats for several years because my batteries are inside my coupe and PU. No fumes, no vents, no corrosion and very good service life. You need to read the fine print on charging. They do not like fast/quick charge and will die a sudden death after about the 2nd or 3rd one (been there, done that). I prefer the Yellow Top ( deep cycle) for my street rods because of the sometimes inactive periods and the constant discharge of sound system and efi memory circuits. The CCA is almost as good as the Red Tops. I also like the side post/top post capability since I use the side posts for starter and main ground leads and the top posts to feed my electrical control panel.which I locate near the battery for easy access vice on the fire wall behind the dash.