Yes, you are absolutely allowed to carry charging cables, USB cords, and power leads in your hand luggage. In fact, it is highly recommended to keep them in your carry-on so you can utilize the charging ports available at airport gates or under the seats on the aircraft. Cables themselves do not contain hazardous materials and do not pose a fire risk in the way that batteries do. However, you should be aware of how you pack them; tangled "nests" of wires can sometimes look suspicious on an X-ray screen, potentially leading to a manual bag search. It is a good idea to use a small electronics organizer or even a simple rubber band to keep them coiled neatly. While cables are fine, remember that the portable power banks (lithium batteries) they connect to must be in your hand luggage and are strictly prohibited from checked bags due to fire safety regulations. As of 2026, security scanners at many major airports have become more advanced, allowing you to keep small electronics and cables inside your bag, but always be prepared to take out large bundles of wires if asked by a TSA officer.