a battery, a liquid reservoir, and a heating coil
You can cut down by slowly increasing the time between cigarettes and reducing the number of cigarettes in your packet each day
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While early studies suggested vaping might be less efficient at nicotine delivery than smoking, newer generation devices, especially those using nicotine salts at higher concentrations, can achieve plasma nicotine levels comparable to, or even exceeding, those from cigarettes, particularly for experienced users
Cary, NC Snyder FR, Davis FC, Henningfield JE (1989) The tobacco withdrawal syndrome: performance decrements assessed on a computerized test battery
4 Is the filter replaceable