What it signals
A quick, universal cue to handlers that the carton holds Class 9 miscellaneous dangerous goods — lithium batteries — that need to be handled and separated accordingly.
Guide
Class 9 Label & Lithium Battery Mark Explained
Two marks turn up on almost every lithium battery carton and are constantly mixed up: the diamond-shaped Class 9 label and the rectangular lithium battery mark. Here is what each one does, when it is required, and why the wrong marking is one of the quickest ways to get an air shipment from China turned back at the warehouse door.
By the Cargo163 operations team · Updated 30 September 2026 · 7 min read
Under the UN Model Regulations, dangerous goods are sorted into nine classes, and Class 9 is the miscellaneous class — articles that present a hazard in transport but do not fit neatly into any of the other eight categories. Lithium batteries sit here because their core danger is not a flammable liquid, a gas or an explosive in the ordinary sense. The risk starts inside a single cell: an internal short circuit, mechanical damage or abuse can trigger overheating that escalates into fire and, in the worst case, thermal runaway.
That classification drives what you stick on the outside of the box. Because the hazard usually begins in one cell and then spreads, the rules lean heavily on clearly identifying and declaring every battery package, so anyone handling it — from the packing line in Shenzhen to the ramp at the destination airport — knows exactly what is in front of them.
Two marks carry most of that responsibility, and they are not interchangeable.
The label
The Class 9 lithium battery label
The Class 9 label is the black-and-white diamond-shaped hazard label. Along the bottom point it shows the number 9, and for lithium batteries a dedicated version is used that carries battery symbols on the upper face. It is applied per package and it declares the hazard class of the goods inside.
Where it goes
On each package offered as fully regulated dangerous goods, placed where it is visible and not hidden by tape, straps or other labels.
When it applies
Required for consignments shipping as fully regulated Class 9 batteries; smaller Section II packages of batteries packed with or in equipment may instead use the lithium battery mark below.
The mark
The lithium battery mark
The lithium battery mark is a different object again. It is a rectangular label — wider than it is tall — that carries three things on one face: an indication that the contents are lithium batteries, at least one UN number from the battery family, and a telephone number to contact if there is a problem with the shipment. That contact number is a real requirement: the person reachable on it should be able to answer questions about the consignment.
Where the diamond label declares a hazard class, the mark identifies the cargo as lithium batteries and provides a direct line of contact for the airline and for emergency responders. You see it most often on batteries packed with, or contained in, equipment — the UN3481 and UN3091 type shipments — especially those handled under the lighter Section II provisions.
Marking rules move with the regulation edition, the transport mode and the battery configuration, so follow the current requirement, not last year's habit.
Class 9 label vs lithium battery mark
- Class 9 label — a diamond; declares the hazard class of the package.
- Lithium battery mark — a rectangle; identifies the battery UN number and a contact phone number.
- Many consignments need both — the exact mix depends on configuration and section.
One is about the hazard, the other about the product and a phone call.
Rejections
Marking mistakes that cause rejection
Acceptance staff check the outside of a shipment in seconds, and a marking error is one of the most common reasons a battery air shipment from China never makes the plane.
The label itself
- No Class 9 label on a fully regulated package
- Generic Class 9 diamond used where a dedicated lithium battery label is expected
- Labels faded, peeling, or covered by tape, straps or other stickers
The mark itself
- A lithium battery mark with no UN number, or the wrong one
- No contact number, or a number that never reaches anyone
- Mark applied only to the overwrap, or on the wrong boxes so part of the pallet is unmarked
Our process
How Cargo163 checks marking before booking
Marking is cheap to fix at the warehouse and expensive to fix on the ramp, so we treat it as a pre-booking step.
Match the mark to the goods
We read your UN number, configuration and Wh or lithium content, then confirm whether each package needs the Class 9 label, the lithium battery mark, or both.
Inspect every carton
Not just the sample box — every package in the pallet gets the right, legible marking, placed where acceptance can see it at a glance.
Confirm before we book
We photograph the marked cargo and cross-check it against the paperwork so the shipment clears dangerous-goods acceptance the first time.
Not sure your cartons are marked right?
Send us photos of your packaging and your battery specs — we confirm the correct Class 9 label and lithium battery mark before your cargo risks rejection at acceptance.
Related reading: Battery Shipping from China · UN3480 vs UN3481 · UN38.3 Test Explained · How to Ship Lithium Batteries by Air · All guides
Note: Labelling and marking requirements vary by chemistry, configuration, transport mode, regulation edition, destination and carrier, and change over time. This guide is general logistics information and does not replace the applicable dangerous-goods regulations; Cargo163 reviews each shipment's markings and documents before confirming a solution.