TSA Rules for Laptops in Carry On and Checked Bags
TSA allows laptops in carry on bags but requires separate screening in most cases. The agency lists laptops, tablets, and large electronics as items to remove from bags and place in a bin for X-ray TSA carry on electronics rules. Laptops in checked bags are generally permitted if the battery is under 100 watt hours, though airlines may impose additional restrictions. For flights to the United States, TSA PreCheck members usually keep laptops in their bags at select airports, but standard lanes require removal TSA security screening overview.
TSA officers may request that you power on a laptop during inspection. Devices that cannot be turned on may be subject to further testing or confiscation. TSA does not publish a specific laptop brand or model ban, but screen size and battery capacity determine whether the device can go in carry on or must be checked. The agency updates procedures periodically, so travelers should check the latest guidance before heading to the airport.
Battery Limits, Watt Hour Rules, and Spare Batteries
Lithium Ion and Lithium Metal Battery Limits
Under FAA and IATA regulations, lithium ion batteries installed in devices are limited to 100 watt hours without airline approval. Batteries between 100 and 160 watt hours require airline permission, and spare batteries above 100 watt hours are generally prohibited in checked luggage. Most standard laptops fall under the 100 watt hour limit, but high performance gaming or workstation models may exceed it and need carrier approval FAA battery safety rules.
Spare lithium metal and lithium ion batteries must be carried in carry on bags, not checked bags, according to the DOT and FAA. The limit for spare batteries is two spare batteries per passenger for personal use, protected from short circuits. Airlines such as Delta, United, and American enforce these limits and may deny boarding for non compliant devices. Passengers should tape terminals and keep spares in original retail packaging or a protective case.
Airline Policies, International Flights, and In Flight Use
Major U.S. and International Carrier Rules
Delta, United, American, Southwest, and Alaska allow laptops in carry on and checked bags within U.S. domestic rules. International carriers such as Lufthansa, British Airways, Emirates, and Air Canada follow IATA guidelines and generally permit laptops in both cabin and cargo compartments, but battery limits remain the same. Some airlines, including certain regional carriers, may restrict power on devices during takeoff and landing, even if the laptop is allowed in the cabin.
For flights departing or arriving in the European Union, the EASA and national civil aviation authorities align with IATA battery limits. Airlines such as Ryanair, easyJet, Lufthansa, and Air France follow these limits and require spare batteries in carry on. In Asia, carriers including Cathay Pacific, Singapore Airlines, and Japan Airlines enforce similar rules, and some require declaration of larger laptops at check in. Travelers should verify the specific policy of their airline before travel, especially for flights with connections that change regulatory jurisdiction.