Welcome to the site. You will get plenty of help here. The where to buy is an answer i can give you. Look around at all of the sites you can first of course but I would buy from arno at awesomevapor. His site is easy to use and he is real quick to answer emails too. I use the 510 with a passthru most of the day so the battery life isnt really a problem for me i keep a battery on me in case i need to be away from my truck for very long. The passthru just plugs into the power point of my truck and when im home i just plug it into the computer usb port and i am set.