I'm just wondering because when I first started vaping about 2 months ago I bought a 150mAh Genesis 510 starter kit with a 20ml bottle of juice, which lasted me about a month and a half. I bought myself a eGo-V V2 Mega 1200mAh with 2 10ml bottles of juice a week ago, and I have already finished one of the bottles and I still have about half left in the other. I've been vaping the eGo at around 3.6 volts, which seems to give me an average vape.