No, you are strictly prohibited from placing vape pens, e-cigarettes, or any spare lithium batteries in your checked luggage in 2026. This is a critical safety rule enforced by the TSA and international aviation authorities (FAA/EASA) to prevent fires in the cargo hold. Lithium batteries have a risk of "thermal runaway" if they short-circuit or overheat; while a fire in the cabin can be quickly extinguished by crew, a fire in the non-pressurized cargo hold could go undetected and lead to a catastrophic incident. You must pack your vape device and all spare batteries in your carry-on bag. Additionally, in 2026, be aware that some countries (like Mexico, Thailand, and Qatar) have implemented absolute bans on the import of vapes; even if you pack them correctly in your carry-on, they could be confiscated at customs in those specific destinations, leading to heavy fines or even detention.