Look at this as a starting point. The Volts were enough to get me to drop down to 3-5 cigs a day, then 1-2 a day, 1-2 a week, and finally none. Picking up an e-cig and never smoking again happens for some people.... but for the majority of us, it's a process.
There are devices with longer lasting batteries out there.... but I still regularly hand out my Volt 78mms to smokers for them to trial for a few days and get started. If they want to move up from there, you can get an X2 for $20 that fits all the cartos you'll have with the minis.
I own a Zenesis Mini (hybrid all on one unit with replaceable battery and rebuildable atomizer).... but when I leave the house, I'm carrying my X2s with clearomizers, and sometimes even the 78mms when I want to be less conspicuous. They get the job done.
ya i've gone from about 12 cigs a day down to about 3 a day using even crappier ecigs than the volt so i'm pretty confident i can get down to 0-1 with the volt. i have 15 cartridges on the way and i have a backup "green smart living" ecig that i can buy 5 carts for $12.99 locally as well.