Lithium battery mark

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Class 9 dangerous goods

The miscellaneous hazard class of the UN Model Regulations, where lithium and sodium-ion batteries sit; wet lead–acid and nickel batteries with corrosive electrolyte are Class 8 instead. Fully regulated battery consignments carry the Class 9A label — seven vertical stripes above a burning-battery symbol — alongside the separate lithium battery mark where that applies.

IATA Dangerous Goods Regulations

The airline industry’s manual for shipping dangerous goods by air, built on the ICAO Technical Instructions and reissued every year. Lithium batteries fall under packing instructions 965–967 for lithium-ion — alone, packed with or inside equipment — and 968–970 for lithium metal. Lithium-ion batteries shipped alone must be at no more than 30 % state of charge; from 2026 so must those packed with equipment above 2.7 Wh.

Section IA, IB and II

The tiers within the air packing instructions for lithium batteries. Section IA is fully regulated; Section IB covers small batteries — cells up to 20 Wh and batteries up to 100 Wh, or 1 g and 2 g of lithium metal — shipped alone; Section II relaxes the rules for such batteries packed with or inside equipment. Section II for batteries shipped alone was withdrawn in 2022.

UN numbers for batteries

The four-digit numbers that identify a battery consignment worldwide: UN 3480 for lithium-ion batteries, UN 3481 for lithium-ion packed with or contained in equipment, UN 3090 and 3091 for the same in lithium metal, UN 3551 and 3552 for sodium-ion, and UN 3536 for batteries installed in a cargo transport unit. Since 2025 battery-powered vehicles have UN 3556–3558.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. UN Manual of Tests and Criteria, Revision 8

   United Nations Economic Commission for Europe · 2023

   Topic background · Dangerous-goods classification tests; subsection 38.3 concerns battery transport testing.

2. Manual of Tests and Criteria, Revision 8, Amendment 1

   United Nations Economic Commission for Europe · 2025

   Topic background · Amendments to Revision 8, including changes to battery testing in subsection 38.3.