So tonight the charging light just turned on as I was going down the highway and has been on ever since. Put on about 20 miles or so - 30 minutes of driving. I changed the alternator February 2012 with a Autozone alternator. Is it possible it is bad again? THey have the lifetime warranty, so I can get a new one. Could the batteries be bad? I need to drive 25 miles to get it to a place to either get a new alt. or get the charging system checked at the Autozone. Should I be ok to go that far? I have the batteries charging now to get as much charge into them as possible?