Howdy all, I'm working on a frontier 600 6x6 with the briggs vanguard 18 hp in it (not my own). I changed the battery because the origional was showing 4.7 volts on the meter and would trip the trickle charger I put it on. Now it's having no charge / no start issues again after a week. I'm thinking the voltage regulator is pooched. Anyone else had these issues? It's pretty young to be dieing yet. I have a vanguard 2 from 1999 that still has origional charging components on it. I'm almost thinking it's getting 30 or so volts a/c out of the stator straight through to the battery. Would this cause cells to go bad on an AGM battery?