Why do you take your laptop out at airport security?

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.



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Cabin-friendly suitcases with a separate laptop compartment are the perfect solution, providing a designated space specifically designed to protect your computer.

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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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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.

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Depending on the type of machine, ionizing radiation is used to identify objects that may be hidden by passengers and to create images of what is in luggage. Backscatter passenger scanners are used to detect threats such as weapons or explosives that a person could be carrying under their clothing.

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It's recommended to put your laptop in a padded laptop bag that fits within the personal carry-on bag. This way, you can place your laptop in an easily accessible location and keep an eye on it.

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TSA Laptop Rules If you're traveling with a computer in your carry on bag, the TSA asks you to “remove the computer from your carry-on bag and place it in a separate bin for X-ray screening.” If, however, you have TSA PreCheck, you do not need to remove your laptop during security screening.

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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.

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You'll want to pack your laptop so that it has some cushioning to protect it from bumps and vibrations. While traveling, you should always carry your laptop on your person. Never put it in your checked bag. Baggage handlers could throw it around, drop it, and cause damage.

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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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In Standard Screening Lane
  • Remove the 3-1-1 liquids bag and place it in the bin.
  • Ensure pockets are empty (keys, tissues, currency, wallets, cell phones, etc.) and remove bulky jewelry (valuable items can be placed in carry-on).
  • Remove your shoes and place them directly on the X-ray belt.


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Taking liquids through security
  • all drinks, including water.
  • liquid or semi-liquid foods, for example soup, jam, honey and syrups.
  • cosmetics and toiletries, including creams, lotions, oils, perfumes, mascara and lip gloss.
  • sprays, including shaving foam, hairspray and spray deodorants.
  • pastes, including toothpaste.


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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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Individuals who refuse to be scanned will be offered an alternative screening method, involving at least an enhanced hand search in private. Any refusal of the body scanner or an enhanced search will result in the passenger unable to fly.

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As you approach airport security, the first checkpoint you will reach is the passport and boarding pass check. To progress through this part of security, you must produce a valid passport and boarding pass. Try to ensure you have these documents in hand as you reach the passport control queue.

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TSA officers swab your hands with a cotton cloth to collect explosives residue for testing in an Ion-Mobility Spectrometer (IMS), the machine they put the cloth in that determines if you go to your gate or to a private security screening for a pat down and metal detector.

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