Transport Regulations for Lithium Batteries

Safe, compliant transport of lithium-ion battery packs

Transporting lithium-ion battery packs requires compliance with international dangerous goods regulations. These regulations are designed to reduce risks during handling, storage and transportation, and apply across air, road, sea and rail freight networks.

This article focuses specifically on lithium-ion battery packs transported as cargo. Other battery types, including lithium metal batteries, and different configurations such as batteries contained within equipment, are subject to additional requirements that are not covered here.

For manufacturers and OEMs, transport compliance is often considered long before a battery leaves the factory. Decisions made during battery design, testing and production can all influence how a battery pack is classified, packaged and transported through the supply chain.

UN38.3: the foundation for lithium battery transport

Before a lithium-ion battery pack can be transported, it must meet the requirements of UN38.3.

UN38.3 is a United Nations testing standard that assesses whether batteries can withstand conditions encountered during transportation, including vibration, shock, temperature variation and low-pressure environments.

Air, road, sea and rail transport regulations all require compliance with UN38.3. Before batteries enter the supply chain, manufacturers must demonstrate that they have completed the relevant testing.

Battery pack manufacturers often consider UN38.3 at the earliest stages of a programme, as testing requirements can influence design decisions, validation activities and project timelines.

Transport regulations by mode

Different transport methods operate under different dangerous goods regulations. While the underlying principles remain similar, each mode sets specific requirements for packaging, documentation, handling and operational controls.

IATA DGR – Air Transport

The IATA Dangerous Goods Regulations (DGR), published by the International Air Transport Association (IATA), govern the transport of lithium batteries by air.

These regulations define requirements for battery classification, packaging, labelling, documentation and quantity limits. Aviation authorities apply particularly stringent controls because of the operating environment and safety demands of aircraft.

For battery manufacturers supplying global markets, air transport requirements often shape packaging, documentation and shipment preparation processes.

UNECE ADR – Road Transport

ADR (the European Agreement concerning the International Carriage of Dangerous Goods by Road), administered by the United Nations Economic Commission for Europe (UNECE), governs the transport of dangerous goods by road across Europe and neighbouring countries.

ADR sets requirements for classifying, packaging, marking and documenting lithium-ion battery shipments, alongside operational requirements for carriers and vehicles.

Road transport plays a central role in many battery supply chains, connecting manufacturers, distribution centres and end users across multiple territories.

IMO IMDG – Sea Transport

The International Maritime Dangerous Goods (IMDG) Code, published by the International Maritime Organization (IMO), governs the transport of dangerous goods by sea.

The IMDG Code sets requirements for packaging, marking, labelling, documentation and stowage. It also includes segregation requirements that reduce risk during long-distance maritime transport.

Where manufacturers build battery packs in one region and deploy them in another, IMDG compliance becomes an important part of logistics planning.

OTIF RID – Rail Transport

RID (the Regulations concerning the International Carriage of Dangerous Goods by Rail), administered by the Intergovernmental Organisation for International Carriage by Rail (OTIF), governs the transport of dangerous goods by rail.

RID aligns closely with other international dangerous goods regulations and covers classification, packaging, marking, labelling and transport documentation.

Rail continues to play an important role in international freight networks, particularly when goods move between manufacturing centres, ports and distribution hubs.

Core requirements for transporting lithium-ion battery packs

Although each transport mode has its own regulations, several requirements apply across all forms of transport.

Lithium-ion battery packs must be correctly classified before shipment. Classification determines packaging, labelling and documentation requirements and ensures organisations apply the correct transport controls throughout the supply chain.

Battery classification

Accurate classification starts with a clear understanding of battery design, chemistry and configuration.

Packaging

Packaging must protect batteries from damage during transport and prevent accidental short circuits or movement within the package.

Shippers must select packaging that meets the relevant transport regulations and suits the battery’s size, weight and transport route.

Marking and labelling

Packages containing lithium-ion batteries must display the correct transport markings and hazard labels.

These markings provide essential information for freight operators, handlers and regulatory authorities, helping them manage batteries appropriately throughout transit.

Documentation

Transport documentation must accurately describe the shipment and demonstrate compliance with the relevant regulations.

Depending on the transport mode, documentation may include dangerous goods declarations, shipping papers and supporting test records.

Manufacturers who maintain accurate records throughout development, testing and production can more easily produce the documentation required for shipment.

Transport compliance through the battery lifecycle

Transport compliance starts long before shipment. The way a battery pack is designed, validated, manufactured and prepared for delivery affects how it must be classified, packaged and transported.

At Alexander Battery Technologies, we consider transport requirements alongside performance, safety and application requirements during battery pack development. We support customers by designing and manufacturing battery packs with applicable transport requirements in mind, and by providing relevant testing evidence, documentation and manufacturing records to support compliant shipment through global supply chains.