The wall adapter won't act as a pass
through, it is only providing .5A...
The computer's USB port must be powered and provide at least 1.5-2.0A. Also when you plug it in to the computer and the battery had completely died on you it has to charge up a bit before it will start providing you the pass-
through functionality.
The iTaste will give you some pass-
through capability but that is really not the way it is meant to be used. The Nokia style plug-in is not ideal for moving the PV about etc, it may too easily slip out or pull out when using it as a pass-through especially as the cord is not that long.
Alright, I'm back again....Here is another issue: When I connect the charger, either via computer or plug, I can't vape. You're supposed to be able to use this as a passthru and it doesn't seem to be working. Please advise. Thanks!