Yes, but the answer changes with the battery. Can I bring batteries on a plane? For ordinary AA and AAA batteries, the answer is a flat yes in either bag.
A loose lithium battery or a power bank is a different story. It can go in a carry-on. It cannot go in a checked bag, and it carries a watt hour limit.
A car battery gets refused outright. That holds in either bag.
Why Can I Bring Batteries on a Plane Depends on the Battery
Every battery rule at the airport comes down to two questions. What is the battery made of. Is it loose or installed inside a device.
Alkaline batteries do not carry the fire risk that lithium batteries do. Regulators leave them alone.
A lithium battery can short circuit and heat up fast. Where it can travel depends on whether a crew member could reach it.
A loose lithium battery cannot go in the hold. Nobody is back there to catch a problem early. The same battery installed in a laptop or camera can usually ride in a checked bag switched off.
Alkaline AA, AAA, and Button Cell Batteries
Standard dry batteries, meaning A, AA, AAA, C, D, and button cells, are allowed in a carry-on bag. They are also fine in a checked bag, per the FAA’s guidance. Just keep them from touching loose metal that could short them out.
This is the answer most people actually need when they ask can I bring batteries on a plane. A pack of AAs for a headlamp travels with zero paperwork. So does a spare set for a kid’s toy or a box of button cells for a watch.
Hearing aid batteries are button cells too. The same unrestricted rule covers them.
Lithium Ion and Lithium Metal: Cabin Only, With Limits
Rechargeable lithium ion batteries follow a stricter rule. So do non rechargeable lithium metal batteries. A loose spare of either type must travel in a carry-on, never in a checked bag.
Capacity decides what happens next for lithium ion. A battery at or under 100 watt hours needs no airline approval. There is no set quantity limit for personal use at that size.
From 101 to 160 watt hours, the battery needs the airline’s approval first. Spares are capped at two per person at that size.
Anything over 160 watt hours cannot fly on a passenger plane at all. That is true in either bag.
Lithium metal batteries are the non rechargeable kind used in some cameras and flashlights. They follow a gram limit instead of a watt hour figure. The cap is 2 grams of lithium content per battery, and spares stay in the carry-on.
A wheelchair or mobility scooter battery gets its own carve out from the FAA. One spare up to 300 watt hours is allowed, or two spares up to 160 watt hours each. That is a higher ceiling than the standard lithium tiers above, since the device itself needs the power.
A detailed rundown of the hold already lives on our checked baggage page. The short version for batteries: loose lithium batteries and power banks are banned from the hold. Installed batteries in powered off devices are fine there, and alkaline batteries never cared about this rule at all.
| Battery type | Carry-on | Checked bag |
|---|---|---|
| Alkaline AA, AAA, C, D, button cell | Yes | Yes |
| Lithium, installed in a device, powered off | Yes | Yes |
| Lithium, loose spare, up to 100Wh or 2g | Yes | No |
| Lithium ion, loose spare, 101 to 160Wh | Yes, airline approval | No |
| Lithium ion, over 160Wh | No | No |
| Car or lead acid battery | No | No |
The table above answers can I bring batteries on a plane for every common type side by side. A removable battery pack rated over 160 watt hours counts as the loose spare row above.
Terminal Protection and How Many Spares to Pack
A loose battery can short circuit if the metal ends touch a coin or a key. The same goes for contact with another battery. Cover the terminals with tape, or leave the battery in its retail packaging.
A small battery case built for this job works too. Pack each spare on its own, not loose in a bag pocket full of cables. Our packing guide covers the rest of that pocket.
Installed Batteries in Your Devices
A phone, laptop, or camera with its battery installed is a different case. Powered off, it can generally go in either a carry-on or a checked bag.
Airlines still prefer electronics in the cabin. A device that gets crushed or switched on by accident is easier to handle next to a flight attendant. Check the full electronics category for rules on specific gadgets.
Car Batteries and Other Batteries That Get Refused
A standard car battery is a wet cell, lead acid battery. It holds acid that can spill. Airlines refuse it as both carry-on and checked baggage.
The TSA’s own guidance on non spillable batteries only covers small gel cell batteries used in electronics. It does not cover vehicle batteries. A genuine car battery needs to ship as air cargo, not passenger baggage.
A TSA officer has the final say on any battery at the checkpoint. That discretion is why an oversized or homemade battery pack can get pulled aside no matter what the label says.
International and Duty Free Differences
Most countries follow the same dangerous goods framework the FAA uses. It traces back to shared international aviation safety standards. The watt hour tiers stay roughly the same on a flight out of London or Tokyo.
Some airlines and countries, especially across the EU and parts of Asia, set a lower spare battery cap. Some ask for original retail packaging too. A duty free power bank still has to fly home in the cabin, not the checked bag.
The Bottom Line
Can I bring batteries on a plane comes down to what kind you are holding. Alkaline AA, AAA, and button cells travel free in either bag. Lithium batteries stay in the cabin, sized by watt hours, and a car battery does not fly as baggage at all.
When in doubt about a specific pack or power station, run it through the packing list screener. Do that before you reach the security checkpoint.