Charlie,
I think you may be on your way to a rather expensive lesson in electronics. You can purchase a 5 volt 2 amp wall supply for about $10 or less and power a regular resistance 510 atty with it if you use a suitable larger gauge USB cable. This 10 watts, when
vaping reasonable juice (24 to 36mg/ml) can provide more than enough nic to satisfy your urges. Might have to vape a little more than a few puffs to get there though.
Going back over some of your previous posts, you are jumping around following to much hype, IMHO. 6 volt mods with little bitty stacked batteries (not my mods BTW) and trying LR attys on high volts tells me you are stressed and will follow anyone's over enthusiastic hype you run across. Not trying to be rude or offensive, but once you get in too big a hurry, you just might run past a good solution.
A well tuned, vaping like a smoke stack e-cig will even get a cigar inhaling smoker off tobacco, I know.
But, if you think you need more, your brain will accept that, and you will need more, and will continue to spend money trying to find it.
The laptop USB is a bad idea. I hope you can settle down and get happy with vaping, because until you stop stressing over it, it will never work. Slow down.