Would that cause the cuboid to show empty batteries? When it did this it wouldn't turn back on as if the batteries were dead. I took batteries out and put them back in again and its working. But noticed a couple of times the last few days it would say the same thing with empty batteries then I would fire again and it would work. Batteries are quite new btw.Check the 510 on the atomizer you're using. Every time this has happened to me the pin has been loose.
Its one of the newer ones with the rba plus deck. If it is the tank I have a few more to fall back on.Earlier Kanger tanks exhibited this exact problem. You might find replacing the coil will resolve it completely, or you may find the Kanger tank base is faulty (depending on how old it is, early ones had loose bases)