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    Knoledge on ohm and connected power source?

    I want to make a VW/VV usb passthru via a 5v 6A(6000mah) usb hub. I'm trying to go about this in the safest way possible. I want to be able to vape sub ohm and have no worry about what ohm I'm vaping at. I have knowledge of switches, wire types, ground so on.. but my question is rather, is it as...