Do not know whether this will help anyone. It's another thing I discovered on the journey. My other half likes the innokin iclear pen thing - we have had two and both have had the same problem. They vape only with pass-through (ie with the USB power cord attached) - but do not vape with just the battery. They charge, the LEDs work - everything seems to work (although they read a static 5.0 with just battery doing the two button test thing). I know the V2 has been discontinued and my other half has the V3 (with no pen and a standard 510 connection - these V3s are fine for us (except when she dropped one in the bath, accident prone as our household is!) So if you get one of these V2s and they do not seem to work, you are not going mad. I have not seen this anywhere else on the web, but given we have had two from different suppliers my guess is that some at least did go out with this fault.
Hope this helps someone - even if I have no solution. I keep trying to convice her to have a Provari but she says it looks like embarassingly something for the bedroom not for public use lol
Hope this helps someone - even if I have no solution. I keep trying to convice her to have a Provari but she says it looks like embarassingly something for the bedroom not for public use lol