I only had both plugged in via USB for a short while and they are working independently now. I tried my old primary Falcon atty on the Lost Vape Centaurus and it said TEMP LOCK or something like that. So, I put on the branch new Falcon King I just got and it is working like a charm. I also took out the batteries for the Think Vape AUXO and put them back in, switched, and it still came back on. I am using quality batteries, H Life. I always charge and discharge them in pairs.