Hi Ray Walsh,
It looks more like a bad alternator than a battery. If the battery is bad, the alternator would provide the charge enough to keep the engine running.
However it could be a blown fuse or wire connection from the alternator to the battery.
You should test the charging voltage at the alternator mast and battery to confirm if it is charging problem. Voltage should be 13.5 to 14.5 volt with engine running.
Wednesday, October 22nd, 2008 AT 2:55 PM