I have searched the internet and can not find an answer to this question. I am a pack a day of regular cig. smoker. I have purchased a non-disposable e-cig with a battery, charger, chamber for the liquids and two liquids, one 12mg nicotine and the other 16mg of nicotine to mix for the flavor. (They are cheap and I can already tell I will be buying higher quality liquids). I want to be able to smoke this thing like I would a regular cig. Like sit for 5-7 minutes with coffee or a drink, puff on it and put it down until the next time I would normally smoke a regular cig. I want to know what levels of nicotine I should use to smoke it in this manner so I don't get too much nicotine at one time and feel bad from too much. I have been putting off using it much until I get an answer to this question. I am older and take meds to control a fast heart rate, so I want to be careful with the nicotine level while I am quitting the regular cigs. So far I've just played with it, taken a puff or two, coughed a lot and put it down. Thanks.