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An Optima question. So far I've read about Optima batteries with different color tops. What do the colors mean? What is "cycle the glow plugs"? Wait until the dash light goes out?

Fortunately I am not on a budget. I've never seen a battery shaped like that Optima. I will look for batteries with at least 800 cold cranking amps tomorrow. I live in Florida where it doesn't stay cold for long in the winter. I think the positions of the battery terminals matter. If my...

This is my first post here. Forgive me if this is in the wrong place and move it. I recently purchased an M1028 dually and today it wouldn't turn over fast enough to start. I've determined it needs new batteries. I've searched this site and gotten a whole lot of good information, but I can't...