Could there be something amiss in the new DMCH alternators? I had never drawn down my battery before, but then I changed my alternator to the new DMCH one because I could sense that the bearings were going bad. Well, it charges, does not make any noises when the key is out, and the light works as it should. (My door lock module is disconnected and the radio has no memory current draw, BTW.) With a brand new battery, in 2 days the battery was dead while the car was sitting with the key off and out of the car. I am going through the fuses and seeing if I can find a culprit. But I never had a problem with my original stock alternator, so it makes my wonder. The install is so easy and straightforward that I see no way that there is a wiring error. Of course the alternator could be to spec but just under some unusual condition of my car, there is a current draw.