Spare (uninstalled) lithium ion and lithium metal batteries, including power banks and cell phone battery charging cases, must be carried in carry-on baggage only. With airline approval, passengers may also carry up to two spare larger lithium ion batteries (101–160 Wh) or lithium metal batteries (2-8 grams).
Spare (uninstalled) lithium metal batteries and lithium ion batteries, electronic cigarettes and vaping devices are prohibited in checked baggage. They must be carried with the passenger in carry-on baggage.
Damaged, defective or recalled lithium batteries must not be carried in carry-on or checked baggage if they are likely to be a safety concern by overheating or catching on fire. When in doubt, leave it out. Check the FAA's Pack Safe website for the rules on carrying these items and other dangerous goods in baggage.
Yes, you can bring AA batteries on a plane. According to TSA regulations, dry batteries such as C, D, AAA, and AA are allowed to be packed in both carry-on and checked luggage.
Such a hazard, in fact, that the FAA has issued a new warning on the dangers such batteries could pose to aircraft, and the could on board, essentially calling for their ban. Lithium batteries present a risk of both igniting and fueling fires in aircraft cargo/baggage compartments.
When a carry-on bag is checked at the gate or at planeside, all spare lithium batteries and power banks must be removed from the bag and kept with the passenger in the aircraft cabin. The battery terminals must be protected from short circuit.
Explosives and flammable items, such as fireworks, gas, and aerosols. Poisonous and toxic substances, including pesticides and certain chemicals. Lithium batteries and other hazardous materials, as these can pose a safety risk if not handled properly.
Items subject to the 3-1-1 rule include liquid and aerosol deodorant, cologne, perfume, shampoo, conditioner, dry shampoo, lotion, sunscreen and toothpaste. Outside of your clear quart-sized bag, you can pack your solid deodorant, toothbrush (manual and electronic), tweezers and mirrors.
A flashlight that is less than 7 inches in length and is not classified as a tactical weapon can be brought on a plane through carry-on. You can bring any flashlight through checked luggage but you must carry lithium batteries with you in your carry-on bag.
Portable chargers or power banks containing a lithium ion battery must be packed in carry-on bags. For more information, see the FAA guidance on portable rechargers. For more prohibited items, please go to the 'What Can I Bring?'
Methods include: leaving the batteries in their retail packaging, covering battery terminals with tape, using a battery case, using a battery sleeve in a camera bag, or putting them snugly in a plastic bag or protective pouch.