There is no problem with vapor production; like I said it was very consistent. It is just not as much as a battery.
For the USB port damage, it did not break it, just made it sensitive to static charges. As is a small static discharge from me will turn off and electronic plugged into the port and I have to unplug and replug into the port to reset.
My passthrough gives just as good (usually better) vapor than a battery. I don't have the USB problem you mention either - static problems? Sounds like something in your computer isn't grounded right.
Both problems may be your computer's fault rather than the passthrough's. If the USB port isn't grounded correctly you could get low power and a finicky connection. Could be a short in your passthrough wire somewhere as well.
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