The buck converter will only waste about 10-20% of power, so while drining 0,5A at the input it will supply about 1,2A at the output, without even getting warm
The author (and friends) gets caught up in the mayhem, which poses the age old question of life imitating art, except there is another art thrown in to suggest a loop
Once you aren't smoking, this feeling wears off quickly, and you are left craving it and, therefore, a cigarette
These components work together to heat the dry herbs or oil, producing a vapor that can be inhaled
Conclusion In the chill of winter, its pleasing to reach for a cigarette to stay warm, but the risks far outweigh any perceived benefits