Do what TomatoSoup suggested, in my case after pulling the radio fuse the drain stopped.Been that way for the four years I have owned the car, I replaced the battery a few weeks after purchase. Heres what I know. I don't drive the car much, if it sits for more than five days I have a drained battery. Leaving a phone charger plugged in will drain the battery in two days. If I run the car every three or four days, no problem. I guess it has a short somewhere, but I have never figured it out.