# Fuel cells containing flammable gases or water-reactive material — Postal shipping restrictions by item category

For Fuel cells containing flammable gases or water-reactive material, carrier 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 category:** Fuel cells containing flammable gases or water-reactive material _(verified: appears in the quote below)_
- **Carrier:** 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. _(verified: appears in the quote below)_

## What the source says

> 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/printable-chart

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).