I tested regular batteries for 5 days and everything worked fine. I found that when I put the ZPower rechargeable batteries back in, I had fewer problems, so I am wondering if they weren’t properly seate or if there could be a problem with the door. My Audi gave me a backup pair of rechargeable batteries as a precaution and I’m going to continue using the ZPower for now as I like them from an environmental POV.