Don't know why you only get 2 years out of the Everstarts...I have a 70lb. thrust MG on my boat and I'm going on the 4th season with the same batteries. I plug my batteries up to the outlet when I get back home and leave them plugged up until I use the boat again. Which is almost every weekend from March to Nov. unless I'm down in my back that is.

But if your wanting something to last about 4 or more years then you'll have to spend the money on a couple of Optima Batteries in the Blue Top style. They go for about 165.00 plus tax. Sam's carries them at their stores.