I am new to E-cigs and have a question. Epuffer states that the combination atomizer/nicotine cartridges for their EAZE Magnum are equal to approximately 20-25 cigarettes and that each normal cigarette yields about 10-15 puffs. Doing the math, this tells me that each cartridge would yield 200-375 puffs. Yet, I saw a couple reviews that stated each cartridge only lasts for about 50 puffs. Wouldn't this only be about 5 cigarettes per cartridge?