I've been using regular Boge cartos with my HV 510, and it's been ok, but I'm really looking to move up. I found the battery life on my HV 510 to be short, only a couple hours at best, so I went for the Ego. I've got an Ego 900mAh that I've been using with a VPX tank and a Boge 3.0ohm carto. I've got a couple 2.0ohm cartos in the wings, but I'm still new to the general basics of batteries, resistance, and what's the best choice to use with what. Mostly I'm looking for something that's going to give me really potent flavour and last me a while. I've heard that dual coil cartos produce great flavour, so I'd like to start there, but still need some advice on the battery/voltage/mod/ect that I should be using, as I'd like the e-cig I finally land on to last me a good day, or at least better than the hour+ I've been working with. Any thoughts?