Many travelers assume that an item is fine as long as it goes into a checked suitcase, but that's not always true. TSA prohibited items in 2026 can have different requirements depending on whether you're carrying them in your hand luggage or checking them. Spare lithium batteries and power banks, for example, generally need to stay in carry-on baggage rather than checked luggage. Other potentially hazardous or flammable materials may have additional restrictions.
Before closing your suitcase, look through every compartment and pay attention to small items such as batteries, lighters, aerosols, camping equipment, and tools. If you're uncertain, check the current TSA guidance instead of relying on an old packing list. Knowing the difference between prohibited, restricted, carry-on-only, and checked-baggage items can make your trip much easier.