Empty your
tanks and put them in one ziplock (pressure change may make them leak). Remove
batteries, put them in battery cases (must be something where they can’t touch, so not loose or they’ll seize them) in another ziplock. Internal battery, turn off. Put all mods in (you guessed it) a ziplock. When I fly where there’s no TSA precheck, those baggies go in a tray with cell phone, tablet or computer through the xray machine. Baggies make it easier to keep them organized and quicker to put back in purse/carryon, also easier for them to see what they are and avoid you having your bag searched. You can carry as many under 3.4 oz bottles of liquid that will fit in a quart baggie (please check your airline, some require original or unsealed bottles, not our diy kind). Southwest doesn’t care. I left half a
tank full in the Flint in my purse, and it did fine. Do NOT put any mods or batteries in checked luggage. It’s illegal for the batteries, and unfortunately, you’re likely to be short a mod when you get your luggage.