I LOVE my Riva 510 but while at home i am constantly vaping. 1.5 to 2 PAD smoker so I'm wondering if it would be smarter to also get a PT. I would be fine with a 510 model but am wondering if i could plug it into the wall instead of my USB port. I have the adapter and am wondering if the "business" end is different than my Riva 510. I am wondering if i can get some high volume cartos for it and see if that helps me vape w/o changing cartos as often. The main question i guess will my wall charger with a USB plug in work or do i need to double check the voltage? and do they sell ones w/o a battery. I don't see a point if my Riva's are fully charged. Thanks in advance.