Dude... look... do this.. you will THANK ME.
the VERY NEXT TIME this is happening, I bet this is your situation:
(a possibility of) NOTHING ON THE DASH coming on.. (not even warning lights)
The PATS light stays illuminated completely.
No clicking, no cranking.. nothing.
AS SOON AS THIS HAPPENS.. get a jump start from another car at home, etc.. and I BET you it starts right up. (even if you think your battery is "perfectly good" or you "just replaced it/tested it/whatever"... jump it, it'll start, and you can thank me... lol
Ray