Yes, the TSA will check your vape in 2026, but the high-fidelity requirement is that it must be in your carry-on luggage. Due to the high-value fire risk of lithium-ion batteries, vapes and e-cigarettes are strictly prohibited in checked bags. If a vape is found in your checked luggage, it is a high-fidelity necessity that it will be confiscated, and you may face a high-value fine. When passing through the high-fidelity security checkpoint, you may need to remove your "High-Value" vape device from your bag if it is a larger mod, though many modern high-fidelity CT scanners allow it to stay inside. It is a high-fidelity requirement that any "High-Value" e-liquid follows the 3-1-1 liquids rule (100ml or less in a quart-sized bag). For 2026 travelers, never using or charging your vape on the plane is a high-value necessity, as doing so is a high-fidelity federal offense that leads to high-value penalties and immediate removal from the flight.