Traveling With Electronics: What Airlines Allow in Carry-On

Electronics are among the most contentious items in luggage rules. The combination of lithium batteries, security screening requirements, and airline restrictions creates a web of rules that can catch travelers off-guard — sometimes with expensive consequences. Here is what you need to know.

Why Electronics Rules Exist

Almost all modern electronics contain lithium-ion or lithium-polymer batteries. These batteries can, in rare circumstances, overheat and catch fire — a risk that is manageable in the cabin (crew can see and respond) but potentially catastrophic in the hold, where fires may go undetected for extended periods. This is why the rules consistently push electronics and spare batteries into the cabin rather than checked baggage.

Laptops at Security

TSA Rules (United States)

The Transportation Security Administration requires passengers to remove laptops from bags and place them in a separate bin for X-ray screening. The reasoning is that laptop batteries and circuitry can obscure other items in the bag on X-ray images.

Exemptions:

• TSA PreCheck members do not need to remove laptops
• Some Trusted Traveler programs offer similar exemptions

Laptops that remain in bags through security may trigger a bag-check — the officer will pull your bag aside, open it, and screen the laptop manually. This adds time and is entirely avoidable.

EU Airport Rules

Most European airports follow similar screening requirements: laptops must be removed and placed in a separate tray. The EU's common basic standards for aviation security require that laptops and large electronics be screened separately.

Enrolled members of EU security fast-track programs (including some holders of Global Entry that also covers EU airports) may be exempt from removing laptops at participating airports.

Other Regions

Japan, South Korea, Singapore, and Australia generally follow similar laptop-removal rules. Procedures vary by airport and can change — always check current requirements for your specific departure airport.

Power Banks and Portable Chargers

Power banks are subject to the strictest carry-on rules for electronics because they are pure battery devices — no other function, just stored energy.

The Global Rule: Carry-On Only

Power banks are banned from all checked baggage worldwide. This is not just a TSA rule — it is enforced globally under IATA Dangerous Goods Regulations, which all commercial airlines must follow.

This includes:

• Power banks inside bags that are gate-checked at the last minute
• Power banks in bags that are checked at the counter
• Power banks given to airline staff for hold storage

If your carry-on is gate-checked due to overhead bin space, you must remove the power bank and keep it with you in the cabin.

Capacity Limits

Power bank capacity limits are based on watt-hours (Wh), not milliamp-hours (mAh). To convert: Wh = (mAh × voltage) ÷ 1000. Most power banks operate at 3.7V nominal voltage.

Capacity	Rules
Under 100Wh (approx. 27,000 mAh at 3.7V)	Allowed in carry-on, no limit on quantity
100Wh–160Wh	Allowed in carry-on with airline approval, maximum 2 per person
Over 160Wh	Prohibited on all commercial aircraft

Common examples:

• 10,000 mAh power bank (3.7V): ~37Wh — easily permitted
• 20,000 mAh power bank (3.7V): ~74Wh — permitted
• 26,800 mAh power bank (3.7V): ~99Wh — permitted
• 30,000 mAh power bank (3.7V): ~111Wh — requires airline approval

Most airlines will approve 100–160Wh power banks when requested in advance. Check with your specific airline before travel.

Cameras and Spare Batteries

Cameras — DSLRs, mirrorless, action cameras, film cameras — are permitted in carry-on baggage with no restrictions on the camera body or lens (subject to standard size limits).

The battery rules are the critical part:

• Camera batteries installed in cameras can travel in checked or carry-on baggage
• Spare (loose) lithium batteries must travel in carry-on only — this is the same rule as power banks
• Protect spare batteries from short-circuit: use original packaging, battery cases, or place individual batteries in separate plastic bags

There is no quantity limit on spare camera batteries under 100Wh. Professional photographers carrying 10 or 20 spare batteries are permitted to do so in carry-on.

Large Electronics: Tablets, Gaming Devices, E-Readers

Tablets, gaming consoles (Nintendo Switch, Steam Deck, etc.), and e-readers do not need to be removed separately at most security checkpoints. However:

• At some airports and under some screening procedures, officers may ask for tablets to be removed from bags — particularly iPad Pro and other large-screen tablets
• Follow officer instructions regardless of what the standard rules say
• Gaming handhelds are generally treated as personal electronics without special restrictions

Devices That Must Go in Carry-On (Not Checked Bags)

Beyond power banks, additional devices must travel in carry-on due to lithium battery content:

• E-cigarettes and vaping devices — lithium batteries, must be in carry-on (see separate guide)
• Spare laptop batteries — any lithium battery removed from a device must be in carry-on
• Smart luggage with non-removable batteries — some airlines now ban smart luggage with integrated lithium batteries that cannot be removed; always remove the battery if your bag has one
• Hoverboards and e-scooters — almost universally banned from aircraft entirely due to large lithium battery packs

TSA Rules vs EU Rules: Key Differences

Topic	TSA (US)	EU
Laptop removal at security	Required (except PreCheck)	Required
Power banks in hold	Banned	Banned
Spare batteries in hold	Banned	Banned
100ml liquid rule for electronics accessories	Not applicable	Not applicable
Smart luggage batteries	Removable required by most airlines	Removable required by most airlines
Medical electronic devices (CPAP, insulin pumps)	Exempt from some rules	Generally exempt

The rules are broadly consistent between the US and EU for electronics. The biggest practical difference is at security screening, where TSA applies more consistent rules across all US airports, while EU airports can vary in how strictly they enforce laptop removal.

Tips for Smooth Security With Electronics

Pack electronics accessibly. Keep your laptop in the top layer of your bag or in a dedicated laptop sleeve that slides out easily. Nothing slows a security line like unpacking a heavily loaded bag to retrieve a laptop.

Use a laptop backpack with a dedicated sleeve. Many travel backpacks have a separate laptop compartment that opens flat — these can sometimes go through security without removing the laptop, though this is at the officer's discretion.

Carry power bank documentation. For power banks near the 100Wh limit, carry the packaging or a screenshot showing the rated capacity in watt-hours. If questioned, you can demonstrate compliance immediately.

Label spare batteries. A small sticker or piece of tape with "SPARE — CARRY-ON ONLY" on battery cases is useful if you're travelling with checked bags and want to remind yourself what stays with you.

Charge devices before travel. Some security checkpoints — particularly on flights to the US from certain countries — may require you to power on electronic devices to prove they function. A dead device may be confiscated.

Know what's in your carry-on. X-ray operators see dense clusters of cables and batteries as potential flags. Keeping electronics organized reduces secondary screening.

The Bottom Line

The core rule for electronics travel is straightforward: lithium batteries — whether in devices or as spares — belong in your carry-on, not your checked bag. Laptops need to come out at security (unless you have PreCheck). Power banks are carry-on only, with a 100Wh free limit and a 160Wh absolute maximum. Cameras, tablets, and gaming devices travel without major restrictions beyond these battery rules.