Is UN38.3 a safety certificate for the battery?

No. UN38.3 is a transport test that shows the cell or pack survives the physical stresses of shipping: altitude, thermal cycling, vibration, shock, short circuit, impact, overcharge and forced discharge. Product safety certifications such as IEC 62619 or UL 1973 are separate approvals and answer a different question: whether the battery is safe to install and operate.

What is the difference between UN3480 and UN3481?

UN3480 covers lithium-ion batteries shipped on their own. UN3481 covers batteries packed with equipment or contained inside equipment. The classification changes which packing instruction applies, how the package is marked, and in air freight whether the shipment is accepted at all on passenger aircraft.

Which documents should arrive with the shipment?

Four items travel together: the UN38.3 Test Summary, the safety data sheet, the dangerous goods declaration for the specific mode, and the packaging certificate showing UN-specification packaging was used. Model numbers and the consignor name must match across all four, since mismatched paperwork is the most common reason a lithium shipment is held.

UN38.3 and Lithium Battery Shipping: What Importers Actually Need

Q: Why do airlines require 30% state of charge?

A lithium-ion cell at a lower state of charge releases less energy if it fails, so IATA limits UN3480 cells and batteries to no more than 30% state of charge for air transport. A pack shipped at full charge can be refused at acceptance or offloaded, regardless of whether the UN38.3 paperwork is complete.

Lithium batteries are Class 9 dangerous goods. That single fact drives every rule that follows, and it is also the reason shipments get held: not because the paperwork is missing, but because one document disagrees with another. UN38.3 sits at the center of it, and it is widely misunderstood as a product safety approval. It is not. It answers whether the battery survives being shipped.

What the eight tests cover

UN38.3 requires cells and batteries to pass a fixed sequence: T1 altitude simulation, T2 thermal test, T3 vibration, T4 shock, T5 external short circuit, T6 impact or crush, T7 overcharge, and T8 forced discharge. Together they simulate pressure changes in an aircraft hold, temperature cycling, road and air vibration, mechanical shock, electrical abuse and forced discharge. Cells and battery packs are tested separately, so a pack built from certified cells still needs its own pack-level test.

The tests are performed once per design and stay valid while the design is unchanged. Change the cell supplier, the pack layout, or the BMS and the original report no longer describes what you are shipping. That is the most common way a valid certificate quietly becomes invalid.

The Test Summary is mandatory, not optional

Since 1 January 2020, manufacturers and distributors must make a UN38.3 Test Summary available. It is a short document naming the cell and pack, the testing laboratory, the test report number, and the edition of the manual the tests were run against. Carriers and consignees ask for it because it is the fastest way to confirm a specific model was actually tested.

Treat the Test Summary as part of the commercial document set, not as a lab curiosity. When a buyer asks for it before ordering, they are checking that a real test exists behind the claim.

UN3480 versus UN3481 changes the rules

UN3480 applies to lithium-ion batteries shipped alone. UN3481 applies when batteries are packed with equipment or installed inside it. The distinction decides which packing instruction applies, how the package is marked, and — for air freight — whether the shipment is accepted on a passenger aircraft at all. Misdeclaring a UN3480 shipment as UN3481 is a documentation error that surfaces at acceptance, when re-packing is most expensive.

Air, sea and road follow different rulebooks

Air freight follows the IATA Dangerous Goods Regulations, which are the strictest of the three. Lithium-ion cells and batteries under UN3480 are limited to no more than 30% state of charge for air transport: a partially charged cell releases less energy in a failure, so the rule reduces worst-case severity. A pack presented at full charge can be refused outright.

Sea freight follows the IMDG Code, which is more permissive on state of charge but stricter on stowage, segregation and container packing declarations. Road and rail in most of Europe follow ADR. The practical consequence: a shipment that is legal by sea can be illegal by air, so confirm the mode before the battery is charged and packed.

Packaging, marking and the document pack

Lithium shipments use UN-specification packaging appropriate to the packing instruction, carry the Class 9 lithium battery mark, and require the correct handling label. Packages are declared as dangerous goods on the transport document for the specific mode.

Four documents should arrive together: the UN38.3 Test Summary, the safety data sheet, the dangerous goods declaration, and the packaging certificate. Model numbers and the consignor name must match across all four. When a lithium container is held, mismatched paperwork is a more common cause than missing paperwork — the documents exist, but they describe three different products.

A short pre-shipment checklist

Confirm the state of charge against the mode of transport. Confirm the UN number matches how the battery is packed. Confirm the model number on the Test Summary matches the packing list. Confirm the consignor name on every document matches the entity on the bill of lading. Four checks, and most holds disappear.