Sortta new to vaping. Think I have found my "all-day" juice. Still looking for the best atty/carto/tank that does not leak no matter how you sit the PV. But my question for today is what is the difference between vaping at 3.7v and vaping at 5v. Right now I am using a 650 mah ego batt. with the new storm chaser tank from SVC. I am also having trouble with the draw on everything that I have tried (atty w/ cart, ego-t, and the storm chaser) I feels like I am just sucking air. If anyone has any advice on anything all comments are appreciated. TIA.