How to Pack Luggage for Air Travel | Rules That Apply Today

The safest way to pack luggage for air travel is to keep all spare batteries and power banks in your carry-on, never in checked bags.

One wrong tap sends a bag through the X-ray machine at security and you realize your power bank is buried in the wrong suitcase. The fix for a smooth flight is understanding which rules come from the FAA and which come from individual airlines. FAA rules govern battery safety on every U.S. passenger aircraft. Airline policies set size and weight limits, and they vary more than people expect. Here’s what actually applies today.

Where Do Batteries and Power Banks Go?

Lithium batteries and power banks have one legal home in your luggage: the carry-on. The FAA requires all spare lithium-ion and lithium-metal batteries, including power banks, to travel in carry-on baggage only. Checked bags cannot carry them at all.

Battery-powered devices like laptops, phones, tablets, and cameras are safest in the cabin too. If a device must go in checked baggage, it has to be completely switched off, not in sleep or hibernate mode, and protected from accidental activation and physical damage. Taping battery terminals or using original packaging prevents short circuits during the trip.

Here is the moment most people get caught: when a crowded flight forces a gate check of your carry-on. You must remove every spare battery and power bank from that bag before it goes into the hold. That includes battery charging cases and external chargers.

FAA Battery Limits: The Watt-Hour Chart

The FAA draws its line at watt-hours, not battery size. Rechargeable lithium-ion batteries up to 100 Wh travel freely in carry-on without airline approval. Batteries between 101 and 160 Wh need airline approval first. Anything over 160 Wh is forbidden on passenger aircraft.

Lithium-metal batteries follow a different measure: 2 grams of lithium per battery is the limit. Larger lithium-metal spares also require airline approval within the FAA’s chart limits, and larger lithium-ion spares are capped at two spares with approval.

Damaged, defective, or recalled batteries and the devices containing them cannot travel in either checked or carry-on baggage unless made safe or the battery is removed first. Baggage location tracking devices powered by lithium batteries are the lone checked-bag exception, allowed only when they stay under 0.3 grams of lithium metal or 2.7 Wh.

Carry-On Size Rules: What Airlines Actually Enforce

Most U.S. airlines use a common carry-on external size limit of 22 x 14 x 9 inches, including handles and wheels. That measurement is the industry standard, but it is not a universal rule.

These are airline policy examples, not FAA rules. The FAA regulates battery safety across all U.S. passenger aircraft. Your airline sets its own baggage fees and dimensional limits, so checking the carrier’s website before packing is the only reliable move. A bag that fits one airline’s sizer can fail another’s by an inch.

When you are ready to buy, comparing tested options side by side saves the guesswork — our roundup of the best bags for airplane travel measures real dimensions against airline limits.

How to Pack a Carry-On That Survives Security

Start with the TSA’s “What Can I Bring?” page as your screening reference for item-by-item rules. Then pack in this order: batteries and power banks on top where they are visible and reachable, liquids in a clear quart bag per the TSA’s 3-1-1 rule, and valuables within easy access for the bin.

For battery-powered mobility devices, the FAA allows one spare battery up to 300 Wh or two spares up to 160 Wh each in carry-on, provided you remove the batteries when required, protect the terminals, and notify the airline in advance.

Gate-checking a carry-on means one final sweep before the bag leaves your hands. Open it, remove every power bank and spare battery, and pocket them. That ten-second check is what keeps your bag out of the cargo hold with a fire risk on board.