without an analog. This is the best I've ever done. I haven't even cheated and looked through the ashtray for something smokeable. I've already saved about $12 and haven't smoked about 2 packs of cigs. If the mathematical equation is correct I've already gained about 4 hours of life. Part of me would love one but I don't physically have any in the house nor any empty packs around to remind me. Skipping a carton of cigs last week and investing in a pv is the best thing I've ever done.