I have been with v4 l for over a month, I have 4 batteries, 2 pass throughs and just ordered another battery.. I tracked it this morning. Started with a full charged xl manual - in 2 hours it was on the charger. Am I vaping too much? If I didn't have the pass throughs, I would be in trouble. I contantly have my batteries lined p for the charger. Is this why some people have said they have 25 batteries?