Just replaced mine with a set of Everstart Extremes group 29s from Wal Mart, cheap, good warrenty, and there is a Wal Mart in every town if I have to replace them. Have a friend with the same size boat and has had good luck with them. Had a set of Optima Yellow tops didnt last 2 years. It was a chore to get those batteries out and the new ones back in on a BayCat, but I got it. When BassCat is ready to redesign the bilge on the BayCat give me a call…Whew its tight in there…