If you have a car battery that doesn't make it abundantly clear which post is positive and which is negative, there are a few ways to be sure.

Batteries charged at the lower voltage met BCI voltage standards for a fully charged battery. The Optima Yellow Top 3478DT is part of the Car Batteries test program at Consumer Reports.

Whether they be the worst or the best car battery brands, these companies have made distinguishing the two pretty easy by color coating them. The positive on a car battery is typically given a ...