A whole 20ml bottle of 24mg in around four hours is the only thing that goes with drinking from what I've found. If you were a very heavy smoker while drinking like I was I'd just say stay away from the beer.
I have to. I've never tried any tobacco flavor though. It's the only thing that might work for me with beer...
Personally I would get a charger but you don't have to. I would also get about three more of those batterys and rotate them. I've heard those are pretty damn good.
As far as the popping, it's your juice. Some do and some don't. Why, I don't know. One thing I do know is that the fresh juice that I have used hasn't seemed to pop as much...ie Comps juice. Bulk made store juice seems to pop more Imo...