🔋 Batteries & Electronic Devices

• Spare (uninstalled) lithium batteries of any size — banned in checked (carry-on only; protect terminals).
• Power banks / portable chargers / battery charging cases — banned in checked (carry-on only).
• E-cigarettes & vaping devices — banned in checked (carry-on only; prevent accidental activation).

Devices with batteries installed (e.g., laptops) are generally allowed in checked, but it’s safer to carry them on.

💥 Explosives & Incendiaries

• Fireworks, flares, blasting caps, dynamite, gunpowder, plastic explosives — banned in checked and carry-on.
• Realistic replicas of explosives/incendiaries — banned in checked and carry-on.

🔥 Flammables & Fuels

• Alcohol over 70% (140 proof) — banned in checked and carry-on.
• Gasoline, lighter fluid, butane/propane, torch lighters — banned in checked (many are banned in carry-on, too).
• Large quantities of aerosols outside “medicinal/toiletry” limits — banned in checked.

Medicinal/toiletry aerosols have FAA quantity limits in checked bags (aggregate ≤ 2 kg/2 L; per container ≤ 0.5 kg/500 ml).

🧯 Compressed Gases

• Compressed gas cylinders — banned in checked unless completely empty (visually verifiable).
• CO₂ cartridges alone — banned in checked; exception: a life vest may include up to two installed + two spare (special instructions).

🔫 Weapons & Deterrents

• Loaded firearms — banned in checked (firearms must be unloaded, locked hard-sided case, declared).
• Self-defense sprays (mace/pepper spray) — generally limited to one ≤ 4 fl oz with safety mechanism; sprays with > 2% tear gas are banned in checked.

Ammunition may be allowed in checked if securely packed per airline/TSA rules; check your carrier.

🔥 Matches & Lighters

• All matches — banned in checked (one book of safety matches allowed in carry-on).
• Lighters with fuel — generally banned in checked (except up to two in a DOT-approved case). Torch lighters: banned.