Shipping lithium batteries has become a critical topic as industries such as electric vehicles, e-bikes, robotics, and portable electronics rely heavily on lithium-ion technology. However, their high energy density makes them prone to overheating, short-circuiting, or even catching fire if mishandled during transport.
To safely ship lithium batteries, companies must follow international transport regulations, use certified packaging, ensure proper labeling and documentation, and comply with testing standards such as UN38.3.
Understanding the correct procedures not only protects people and cargo but also ensures compliance with global logistics regulations and avoids costly shipment delays.
Understanding Lithium Batteries and Their Classifications
Lithium batteries fall into two main categories: lithium-ion (rechargeable, used in laptops and EVs) and lithium-metal (non-rechargeable, common in watches and medical devices). They are classified as Class 9 miscellaneous dangerous goods under United Nations (UN) numbers:
- UN 3480: Lithium-ion batteries (standalone).
- UN 3481: Lithium-ion batteries packed with or contained in equipment.
- UN 3090: Lithium-metal batteries (standalone).
- UN 3091: Lithium-metal batteries packed with or contained in equipment.
- UN 3171: Battery-powered vehicles.
- UN 3536: Lithium batteries installed in cargo transport units.
Size matters for regulations. For lithium-ion, “small” cells are ≤20 Wh and batteries ≤100 Wh; for lithium-metal, cells ≤1 g lithium content and batteries ≤2 g. Larger ones are fully regulated, while smaller ones may qualify for exceptions if properly packaged.
New in 20261: Sodium-ion batteries (an emerging alternative) have their own UN numbers, like UN 3551 (standalone) and UN 3552 (packed with equipment), with similar rules.
Step-by-Step Guide to Safe Lithium Battery Shipping
1. Classify and Test Your Batteries
Determine the UN number, type (ion or metal), and configuration (standalone, packed with, or contained in equipment). All batteries must pass UN Manual of Tests and Criteria (Subsection 38.3) for safety, with a test summary available upon request. Exceptions exist for prototypes or low-production runs with approvals.
2. Prepare the State of Charge
For air shipments, charge batteries to ≤30% of rated capacity to reduce fire risk. This is mandatory for more categories in 2026. Use a voltmeter or charger to verify.
3. Package Securely
Prevent short circuits by insulating terminals (e.g., with tape) and using non-conductive inner packaging like plastic bags or blister packs. For fully regulated batteries, use UN-specification outer packaging (e.g., fiberboard boxes meeting Packing Group II tests). Smaller batteries need strong outer packaging that withstands a 1.2m drop test, with a gross weight ≤30 kg.
For batteries packed with equipment, secure spares to avoid activation. In vehicles, fasten batteries and protect from damage. Avoid mixing with other dangerous goods like flammables or oxidizers.
4. Label and Mark the Package
Apply the Class 9 Lithium Battery hazard label for fully regulated shipments. For smaller batteries, use the Lithium Battery Mark (a rectangle with red hatching, UN number, and optional phone number—phased out by December 31, 2026). Add “Cargo Aircraft Only” for air-restricted items. Include shipper/consignee details and overpack markings if applicable.
5. Prepare Documentation
Fully regulated shipments require a Hazardous Materials Shipping Paper with emergency contact info. For air, include a Shipper’s Declaration for Dangerous Goods. Smaller batteries often need no papers, but indicate compliance on air waybills. FedEx and UPS may require additional approvals for certain items.
6. Choose Shipping Method and Carrier
- Air: Limited to 35 kg net weight per package for cargo; forbidden on passenger planes for standalone batteries.
- Ground: Fewer limits; UPS and FedEx accept in the U.S. with restrictions on damaged items.
- Sea: Similar to air but with vessel-specific stowage rules.
Train employees handling shipments per DOT/IATA requirements.
Required Labels and Documentation
Lithium battery shipments must include specific labels and documentation.
Common mandatory labels include:
- Lithium battery handling label
- UN number label (e.g., UN3480, UN3481)
- Class 9 hazardous material label for certain shipments
Typical documentation may include:
- Shipper’s Declaration for Dangerous Goods
- UN38.3 test summary
- Safety Data Sheet (SDS)
- Packing list and commercial invoice
Conclusion
Safely shipping lithium batteries requires strict adherence to international transport regulations, proper packaging, clear labeling, and complete documentation. By following standards such as UN38.3 testing and transport rules from IATA, IMDG, and ADR, manufacturers can minimize risks and ensure smooth global distribution.
As the demand for lithium batteries continues to grow in sectors such as electric mobility, robotics, and energy storage, understanding safe shipping practices is essential for manufacturers, distributors, and logistics providers.
Reference
- IATA Guidance Document for Lithium Batteries and Sodium Ion Batteries – 2026. Available at: https://www.iata.org/contentassets/05e6d8742b0047259bf3a700bc9d42b9/lithium-battery-guidance-document.pdf ↩︎
