Welcome and glad you joined.there are SOOO MANY confusing things to consider here.
Might try to learn the ABC's by reading the information below. The information below may answer some of your questions. Could try the search function in upper right hand corner of this post, by typing in "pass through batteries".
Might like to read:
http://www.vaporauthority.com/pages/learn
http://www.ecigarettedirect.co.uk/a...tte-college-guides-tutorials-information.html
Beginner – Guide To Vaping
http://vapingcheap.com/vaping-101/
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