# Fuel cells containing flammable gases or water-reactive material · FAA (air transport) — Flying with restricted items: FAA, TSA and IATA baggage and air cargo rules

For Fuel cells containing flammable gases or water-reactive material, authority is FAA (air transport); restriction type is restricted; scope is carry-on only; not allowed in checked bags; conditions is Each fuel cell must be marked 'Approved for carriage in aircraft cabin only'; each cartridge must be marked with the maximum quantity and type of fuel, recorded from its source on 2026-08-10.

- **Item or substance:** Fuel cells containing flammable gases or water-reactive material _(verified: appears in the quote below)_
- **Authority:** FAA (air transport) _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** carry-on only; not allowed in checked bags _(our reading, not quoted from the source)_
- **Conditions:** Each fuel cell must be marked 'Approved for carriage in aircraft cabin only'; each cartridge must be marked with the maximum quantity and type of fuel.

## What the source says

> Fuel Cells Containing Flammable Gases or Water-Reactive Material Quantity limits: No limit on devices. Two spare fuel cell cartridges may be carried. Fuel cell cartridges may be changed out in the device but empty fuel cells and fuel cell cartridges may not be refilled with fuel while on the aircraft. Each fuel cell must also be marked "Approved for carriage in aircraft cabin only". Each fuel cell cartridge (not the electronic device) must be marked with the maximum quantity and type of fuel in the cartridge.

## Source

- https://www.faa.gov/hazmat/packsafe/fuels

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Flying with restricted items: FAA, TSA and IATA baggage and air cargo rules](https://referencesource.org/air-travel-item-restrictions/).