IATA: Corrosives Limitations

Battery-powered wheelchairs and similar mobility aids with spillable batteries that are for use by passengers with a disability or temporary mobility problem may be permitted as checked baggage with operator approval as long they meet certain criteria:

• If the device can be loaded, stowed, secured, and unloaded in an upright position, the battery can remain installed.
• The operator must ensure that the battery terminals are protected from short circuits, the battery is securely attached to the wheelchair or mobility aid, and that it is protected from being damaged by moving cargo.
• If the device cannot be loaded, stowed, secured, and unloaded in an upright position, then the battery must be removed, and the wheelchair or mobility aid can be checked as baggage without further restrictions.
• In order to check the battery, it must be carried in strong, rigid packaging that is leak-tight, secured in the cargo compartment, and protected against short circuits.
• In addition, the packaging must be marked "BATTERY, WET, WITH WHEELCHAIR" and labeled with a corrosive label and package orientation label.
• The pilot-in-command must be notified that the wheelchair, mobility aid, or battery is onboard, along with its location.

A mercury barometer or thermometer may be permitted as carry-on baggage if it is being carried by a representative of a government weather bureau or similar official agency. The device must be packed in strong outer packaging with a sealed inner liner or other leak- and puncture-proof material. The pilot-in-command must be notified of the location of the barometer or thermometer.

One small medical or clinical thermometer that contains mercury may be permitted without operator approval as long as it is in its protective case.

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