Red, Yellow or Blue top Optima?

[Rory McNeil]

When I bought my used Wells Cargo trailer, it came with an optima blue top battery. As mentioned, the blue top has 2 pairs of terminals, 2 regular terminals, and 2 smaller threaded studs. On my trailer the 2 large terminals went to the inside winch, and the smaller studs were for various 12 volt accessories, like radio, 12 volt lighting, tongue jack, alarm, etc. I replaced the Optima with a conventional deep cycle wet cell battery, because I could never get the Optima to take a full charge. Optima says that you need a special battery charger, I tried an alternate charging method, using a 2nd regular battery and booster cables, with a regular battery charger, but it never seemed as strong as I thought it should have been. The wet cell battery pulls the car into the trailer with the winch much stronger than the Optima ever did,