The battery is new, only receipt from last owner. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
Will remove and check the terminals for corrosion but at first sight they are totally clean, no sign of corrosion. May go ahead and replace the cables, get rid of that possibility then move down the system.
For what it's worth, no recurrence since, will hopefully buy time to find the prob. Thanx all! D!