I left a OBDXPRO VT V3 adaptor plugged into the obd port. I do that often but I'm normally driving the car daily so its not an issue. Last week I left in plugged in and left town. A week later when I got back the battery was dead. No problem, unplugged adaptor and put a charger on the car. next day, battery fully charged, plug in VT PRO, lights go on but wont connect to car or phone/laptop. It looks like the bluetooth works and shows as connected with the laptop. Tuner pro and PC Hammer dont show as connected to the car. Spoke with Pete at OBDXPRO-dot-com, he said it may have damaged the adaptor from leaving it running with less power than it was designed for. Sounds plausable, so I ordered another one should be here in 5 days or so. Just wondering if anyone else has had a similar experience? The adaptor I screwed up worked perfectly. I have no problem admitting it was my fault and getting a new one because it worked so perfectly. Thanks!