Batteries charged at the lower voltage met BCI voltage standards for a fully charged battery. The Optima H6 is part of the Car Batteries test program at Consumer Reports. In our lab tests ...

seem to act the same but cost way less. The answer? Stick with the more expensive deep-cycle batteries. If you want to tell your optima yellow tops from your marine deep-cycles, check it out.

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.