Well I'll go against the grain. I needed 2 new trolling batteries and 1 new cranking battery for our boat this past spring. I searched for reviews and Deka consistently got high reviews. Much higher than Interstate. I talked to my local Napa guy and found that their batteries were made by Deka, so Napa are now in the boat. I only have 1 season on them so I can't tell you yet how they'll do long term.