I took my Nissan Cube there after it shutting off ...

I took my Nissan Cube there after it shutting off on me. They kept my car for 3 hours, did a 35 point inspection on it to only find nothing wrong. Fast forward 2 days when my car dies and AAA comes to give me a jump and tells me that my battery is all the way dead! How come the 35 point inspection didn t find a bad battery?! However, they were very pleasant with a great waiting room but I m very disappointed that they didn t catch a dead battery that had corrosion all over it!