While you can bring much more in "hold" (checked) luggage than in carry-on, it is a common misconception that "anything goes." In 2026, security regulations are stricter than ever regarding hazardous materials. You cannot bring loose lithium batteries, power banks, or "smart" luggage with non-removable batteries in the hold, as these are fire risks; they must stay in the cabin with you. Explosives, flammable liquids (including high-proof alcohol over 70%), and gas canisters are strictly forbidden. However, the hold is the correct place for items banned from the cabin, such as large liquids (shampoo, wine, spirits), sharp objects (knives, tools), and sports equipment. You can also pack certain "dangerous goods" like small amounts of ammunition or dry ice, but these must be declared to the airline at check-in and adhere to specific packaging rules. It is also important to note that while "legal," you should never pack high-value items like jewelry, cash, or essential medication in the hold, as the airline’s liability for lost or damaged checked bags is limited, and the risk of theft or transit delay is significantly higher than for hand luggage.