The actual voltage, matching the car battery's voltage, will be approximately 12.5 volts when dormant (less in cold conditions), approximately 14.5 volts when the engine and the alternator/generator are operating (more when cold), and may briefly drop as low as 56 volts during engine start due to the high temporary battery current usage
Even inside the clear bag, put e-liquid bottles in a small zip-lock of their own
While a one-time dry hit might not cause a sore throat, frequent dry hits expose you to burns that might end up hurting your throat
If you have a compromised immune system due to conditions like cancer, sickle cell disease, or HIV, see the doctor with an earache
Final word Traveling with an e-cigarette or vape through airport security is permitted so long as you comply with the liquid rules