Sorry guys, I've spent the better part of 6 hours searching both ECF and google to find what I'm looking for to no avail. What I want is a 3.7V passthrough that's direct, no inline battery, and not like the Ego PT where it charges it, and you can unplug and vape. What I'm looking for is a dedicated 3.7V passthrough that's simply that... a usb passthrough that plugs into my usb port has a chord going to a 510 manual switch that will run my 510 at 3.7V. If ANYBODY knows where I can find this it would be greatly appreciated. I don't like the idea of the inline battery ones, and I don't want a plug and go Ego when I have a Provari and an ICON that I'm more than happy with using while NOT at the computer. Any help would be greatly appreciated, thanks guys!!