Those batteries look pretty nice! I'm still a fan of the optima, i haven't had any problems with them thus far. We can't be sure when that yellow top was put in your boat or where it was before the SX either. Also, if there is a small draw on your boat, like there is in my 4-runner, it is going to drain any battery when it sits for a long period of time. peace. By they way, ordered my new bindings (2007 byerlys) sweeeet!!