The advice you guys are givin me is exactly what i needed. I do have a standard 510 batt. kr808 batt a ton of carto's and juice from vapor for life. The reason I want the tank is , vapor production from direct dripping while on the go and batt life. I usually take all my devices with me to work and the chageres. The still don't last and the vaping gets week. So I thank you for tyhe concern about reling on only the tank to get through the day but Ive' tried these other devices and there not cuttin it. I even have an801 ego style for heavy drippin and vaping at home whe I can chill. See I do construction so I need vapor production and consistant batt. life. The tank is the answere, I'm pretty sure. But this cignot websit.... I'm going to check out I didn't Know it was an option. All I thought I had to choose from was Totally wickeds tank and The inferno. Besides this cignot brands are there more? Thanks everyone I'll check it out, although I'm pretty sure I'm going with the signot Sounds like you guys have had good exp. with this comp.