1999 Dodge Avenger Battery keeps draining

Electrical problem
1999 Dodge Avenger 6 cyl Front Wheel Drive Automatic

My battery on the 1999 dodge avenger keeps draining when I leave it parked for longer than two days. I have had the battery replaced twice now and the alternator checked several times which is good. Have made sure nothing is left on yet the battery continues to drain. I just had the alternator checked again and the battery charged and checked both are good to go but the car still needed jump started the next day.