Question:
Can I vaoe a electric cigarete on tishe bov? Or should I rather use regular cigarettes
Answer:
Regular smoking is controversial and the Mishna Berura says not to smoke on Tisha B'av, except if the person is highely atticted to it, then he should only smoke after chatzos, and only in private. Smoking e-cigarettes is worse than smoking regular cigarettes because it also has a taste to it.
Best Wishes
Sources:
M:B 555-8, Poskim