Volvo Repair: Battery Problem - 2002 XC70, schmoes, battery problem

Question
Four days ago I was sitting in the car waiting on someone with the radio on and noticed the display showed "Low Battery Voltage".  I attempted to start the car and it clicked and tried to turn over.  I jump started it and drove it home.  It was fine for a few days and then yesterday after being parked for 1.5 hours, clicking and no start.  Jump started, and drove it home.  This morning, same thing.  I had the battery tested yesterday at the local parts store on the way home and they said it was fine.  Any ideas?

Answer
Tim, if its a Volvo battery, even though it test fine, get a new one.  They suck.  There may be a draw somewhere in the system.  May be a voltage regulator on the alternator.  There was a bulletin on it.  Have it check out by a real Volvo shop or dealer.  No joe schmoes garage, they will try to sell you an engine.  HAHA.  Roger