I got a Provari (V1, original) just about 2 weeks ago from a friend. He let me borrow an 18490 battery until I got my own batteries. I found with that battery I would get between 3-4 hours of normal vaping, less if I vaped heavily. I acquired 2 18650 button top batteries about a week later, and those are MUCH better - I can get almost a full day out of them, maybe more. The charger I got from a local battery shop was designed for the 18650's but it's spring loaded and charged the 18490 just fine. I have 2 of the 18650's I can rotate between, so there is always one in the Provari and one usually in the charger, or in most cases, fully charged ready to go. For less than $10 each, definitely get at least 2 so you're never dead in the water!