π₯ Can you bring Hand warmer / heat pack on a plane?
Chemical packs: either / electric: cabin only
As of 2026-08-24
The rule in detail
Single-use iron-oxidation heat packs are unrestricted in both the cabin and checked baggage. Rechargeable electric hand warmers contain a lithium battery, so they follow the power-bank rule: 100Wh or less, cabin only, never checked. Catalytic hand warmers that burn lighter fluid are banned from both, because the fuel is a flammable liquid.
Why the rule is written this way
It is classified as Allowed with conditions β check the rules because capacity, shape and quantity decide whether it passes, so the same object can be confiscated on one trip and not the next.
Measure it yourself before you leave, and if it is borderline ask the airline and keep the answer in writing. At the checkpoint the final call is the security officerβs.
The rules this verdict comes from
The verdict above follows from 2 Korean rules listed below, named in the original Korean because that is how they are indexed at the national law database. These are the rules themselves, not an airline summary β when screening staff disagree, this is the text that decides. Rules are amended; anything changed after the review date above follows the original.
What actually happens at the airport
- Check-in desk β this is the point of no return for your suitcase. Anything that may only travel in the cabin cannot be retrieved after this step.
- Security screening β if the X-ray flags a shape, the bag is opened. Most problem items are caught here.
- Extra check at the gate β on some routes there is one more inspection.
Confiscated items are rarely returned. If you are unsure, confirm the specification before you leave home.
Move rechargeable warmers out of your suitcase and into your carry-on
Other items in the same class
The items below are also classified as Allowed with conditions β check the rules. Quantity and volume limits differ per item, so check each rule separately.
| Item | Rule |
|---|---|
| 𧴠Liquids / gels / cosmetics | Cabin: 100ml or less / checked: no limit |
| β οΈ Cordless hair straightener (built-in battery) | Not permitted β confiscated in Japan |
| πΎ Alcohol (wine, whisky, spirits) | Checked only (5L limit for 24β70% ABV) |
| πͺ Razors / razor blades | Razor: cabin OK / loose blades: checked only |
| β½ Butane canisters / camping fuel | Banned in cabin and checked (flammable gas) |
| πͺ Scissors / utility knives | Blades under 6cm only (no utility knives) |
| πͺ« Dry-cell / spare lithium batteries | Alkaline: either / lithium: cabin only |
| ποΈ Contact lenses / lens solution | Lenses: no limit / solution: 100ml max |
| πΈ Perfume | Cabin: 100ml max / checked: 2L per person |
| π Nail polish / remover | Cabin: 100ml max / remover counts too |
| πΎ Pet / carrier | Advance booking required (cabin under 7kg) |
| πΈ Musical instrument | Small: cabin OK / large: buy a seat |
| π₯€ Water / soft drinks | Not through security (buy it airside) |
| π΄ E-scooter / self-balancing board | Banned in cabin and checked (battery too large) |
| π΅ Cash / valuables | Keep it on you (declare over USD 10,000) |
Frequently asked questions
- Hand warmer / heat pack β can I take it in the cabin?
- Chemical packs: either / electric: cabin only. Single-use iron-oxidation heat packs are unrestricted in both the cabin and checked baggage. Rechargeable electric hand warmers contain a lithium battery, so they follow the power-bank rule: 100Wh or less, cabin only, never checked. Catalytic hand warmers that burn lighter fluid are banned from both, because the fuel is a flammable liquid.
- Hand warmer / heat pack β can I put it in checked baggage?
- It depends β Chemical packs: either / electric: cabin only. Volume, quantity, shape or a declaration can change the answer, so settle that before you check the bag.
- Is there anything else to watch out for with Hand warmer / heat pack?
- Move rechargeable warmers out of your suitcase and into your carry-on