Can I Bring It on a Plane? Carry-On & Checked Rules (2026)

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Every item has a carry-on ruling, a checked bag ruling, the limits in numbers and its sources.

Will your power bank fly?

Power banks are the item that changed most in 2026. ICAO now caps international passengers at two, and 15 of the 21 airlines we track ban using one on board.

See every airline's power bank rules

The questions people ask most

Short answers for US flights. Each links to the full rules and sources.

Can I bring a lighter on a plane?

One disposable or Zippo-type lighter in your carry-on or pocket. Torch lighters are banned in every bag. Full rules

Can I bring a power bank on a plane?

Yes, in your carry-on only, up to 100 Wh without approval. Many airlines now ban using it in flight. Full rules

How much liquid can I take?

3.4 oz (100 ml) per container, all in one quart-size bag, in US carry-ons. Medication and baby formula are exempt. Full rules

Can I bring a razor?

Disposable and cartridge razors, yes. Loose blades and straight razor blades go in checked bags. Full rules

Can I bring food?

Solid food, yes. Spreads, dips and drinks count as liquids. Customs rules apply when you land abroad. Full rules

Can I bring a vape?

In your carry-on or pocket only, never in checked bags, and you can't use or charge it on board. Full rules

Guides

The rules behind the rulings: liquids, batteries, prohibited items, food and medication.

All 12 guides

Batteries & power banks
Can I bring a power bank on a plane? Rules for 2026
Power banks go in carry-on only: up to 100 Wh is fine, 101–160 Wh needs airline approval. Plus the 2026 two-power-bank rule and airline in-flight bans.
Liquids & toiletries
How many ounces can you take on a plane? The TSA liquids rule
Carry-on liquids must be 3.4 oz (100 ml) or less per container in one quart-size bag. What counts as a liquid, exemptions and checked-bag limits.
Security rules
What can't you bring on a plane? Prohibited items by category
Items not allowed on a plane, sorted by rule: carry-on bans like knives and bats, checked-bag bans like power banks, and items banned from every bag.
Batteries & power banks
mAh to Wh: what a watt-hour is and how to convert
Convert mAh to Wh: multiply mAh by voltage, divide by 1,000. 10,000 mAh at 3.7 V is 37 Wh. Worked examples, a conversion table and why airlines use Wh.
Batteries & power banks
Lithium batteries on planes: carry-on and checked bag rules
Spare lithium batteries go in carry-on only; installed ones can be checked if the device is off. Wh and 2 g limits, AA batteries, vapes and smart bags.
Security rules
What can't go in checked luggage? Carry-on-only items explained
Power banks, spare lithium batteries, vapes and lighters must fly in the cabin. Why, the limits, laptop rules and what to do if your bag is gate-checked.