Why do you need to check your laptop at the airport?

The main reason you have to remove your laptop from your bag is because its battery and other mechanical components are too dense for X-rays to penetrate effectively – especially if the scanning system is old. The same goes for power cords and other devices such as tablets and cameras.



When you go through airport security, you are required to remove your laptop from your bag because its internal components—specifically the large battery and dense circuitry—are so complex that they can block the X-ray's view of items hidden underneath it. A laptop essentially acts as a "shield" on an X-ray screen, potentially masking explosives or other prohibited items. By placing it in a separate bin, security officers can get a clear, unobstructed image of the device itself and the rest of your belongings. In 2026, however, this rule is becoming less common due to the rollout of CT (Computed Tomography) scanners. These advanced machines produce a 3D image of your bag's contents, allowing officers to "rotate" the view digitally and see "behind" the laptop. If you are in a lane with a CT scanner or have TSA PreCheck, you generally do not need to remove your laptop. For everyone else, "checking" it at the belt is a mandatory step to ensure nothing dangerous is tucked away in the shadows of the motherboard.

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Remove personal electronic devices larger than a cell phone from your carry-on bag and place them into a bin with nothing placed on or under them for X-ray screening. (E.g. laptops, tablets, e-readers and handheld game consoles.) Remember to check the bins and collect all belongings after going through screening.

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Laptops with batteries below 160 watt-hours are allowed in hand and checked luggage, but batteries over 100 watt-hours require airline approval. Batteries over 160 watt-hours are banned. Spare batteries below 160 watt-hours are allowed only in hand luggage. Read Next: Can You Bring External Monitors on Planes?

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If devices are carried in checked baggage measures must be taken to prevent unintentional activation and to protect from damage and the device must be completely switched off (not in sleep or hibernation mode). Large portable electronic devices such as laptops and tablets should not be packed near aerosols or perfumes.

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Even though x-rays won't damage your laptop, sending it through an airport x-ray machine is usually not a good idea, since it makes it easy for people to steal your laptop. Usually you can ask the airport security staff to inspect your laptop manually.

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TSA Rules for Multiple Laptops The Transportation Security Administration does not limit the number of laptops that you pack in your carry-on bag, even for international flights. In fact, the @askTSA Twitter account posted that “Laptops are allowed in carry-on bags with no quantity limitations.”

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Putting your laptop in a checked bag can cause it to get damaged from the rough baggage handling and the stacking of bags over one another. Putting your laptop, a valuable item, in checked baggage also means a higher chance of its disappearance.

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In most cases, an airline will allow you to bring one carry-on baggage and one personal item. A personal item is normally something like a purse, laptop, backpack or camera case. Personal items should always be small enough to fit underneath the seat in front of you.

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A good rule of thumb is that if your carry-on bag fits under the seat in front of you, it's considered a personal item. This includes small backpacks, purses, briefcases, laptop bags, etc. Larger bags, including suitcases, must fit in the overhead bin compartment.

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In the US, travelers are allowed to refuse to go through the body scanner and opt for a physical search instead. Passengers who have been selected for enhanced screening, however, cannot opt out of the full-body scanner.

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Air travel is set to get easier with the invention of a scanner which can detect the contents in the traveller's bottle, enabling passengers to carry their own refreshments again.

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Is toothpaste considered a liquid by the TSA? Yes, toothpaste must adhere to the 3-1-1 rule for liquids and gels. Toothpaste can be brought through TSA security in your carry-on as long as it is 3.4 ounces (100 milliliters) or less and placed in a 1-quart bag.

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Most electronic devices containing batteries are allowed both in carry-on and checked baggage. Customers can bring cell phones, smartphones, electronic games, tablets, computers, cameras, calculators, etc. General airline regulations suggest that all portable electronic devices are put in your carry-on baggage.

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Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.

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Rules for Flights in the USA You can pack them in hand and checked luggage, and it doesn't matter whether they're plug-in type or wireless. The only requirement is that the wires should be securely wrapped, in case they need to be removed for additional screening.

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Yes, handbags do count as your one piece of hand luggage. The best way to get around this is to place your handbag within your cabin bag/luggage piece and remove it to use once onboard. The same rule applies to items such as laptops and items bought at the airport.

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Typically in economy, you can bring one carry-on and one personal item. If you bring two bags, one must fit underneath your seat and the other can go into the overhead bin. If you're flying in an upgraded class like business or first, you may be allowed an additional carry-on bag.

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Most airlines consider your laptop bag as a personal item, and as long as it fits under the seat in front, you're golden. But remember, even though it's a “personal item,” it's not your “personal gym.” Avoid overpacking it like a Thanksgiving turkey.

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