I'm a heavy vaper and I get 4+ hours from AW IMR 18350s, I have no Idea how much run time I get from their 18650s, I can vape on one all day at work, come home and my batt still shows 3.8 volts, I would suspect it's your batterys. I vape an RBA which are notorious for draining batterys. I have never had a problem with life. I don't even bother to carry a back up batt with me anymore. If you have a multimeter, check you batts voltage when they come off the charger, I have a Efest Luc and it's a "liar, liar, pants on fire". Half the time it says my batts are fully charged (4.2 Volts) and they are only at 3.8 or so and I have to put them back on the charger. Good batterys are cheap insurance. You can spend ....-loads of money on Mods and vape delivery devices and they will suck for want of a good battery. The Orbs that Thrasher linked are very intriguing, just ordered two (thanks Thrasher....my CC now hates you too), RTD batteries has really good Batt prices, quick shipping and takes PayPal. They also carry a lot of vape stuff at good prices so keap a tight grip on your wallet.