[40] In October 2013, Aldi opened its 300th store in the UK
When heated, they release a nicotine-containing aerosol with much lower numbers and levels of harmful chemicals compared with cigarette smoke
There's also this 2015 study in JAMA , which suggests students who use e-cigarettes are later more likely to report smoking combustible cigarettes compared with non-vapers
This strategy makes the most sense, as it reduces the amount of flavor and aroma "cross-contamination" within the humidor, and it gives you a quick way to decide which cigar to spark
[43] Nickel-cadmium (NiCad), nickel metal-hydride (NiMh), lithium ion (Li-ion), alkaline and lithium polymer (Li-poly), and lithium manganese (LiMn) batteries have been used for the e-cigarettes power source