Radio Frequency Testing

UN38.3 certification is the fundamental safety compliance requirement for transporting lithium batteries by air, sea, and land. This guide focuses specifically on the transport compliance aspects of UN38.3, covering regulatory frameworks, Test Summary requirements, packaging specifications, and documentation needed for global battery logistics.

UN38.3 in the Context of Global Transport Regulations

UN38.3 is not a standalone certification — it sits within a complex web of international transport regulations that govern lithium battery shipping worldwide:

• IATA DGR（Dangerous Goods Regulations）— governs air transport, updated annually. Current edition: 67th Edition (2026)

• IMDG Code（International Maritime Dangerous Goods Code）— governs sea transport, Amendment 42-24 effective since January 2026

• ADR（European Agreement concerning the International Carriage of Dangerous Goods by Road）— governs European road transport

All three regulatory frameworks require that lithium batteries have passed UN38.3 testing before being offered for transport. Without a valid UN38.3 test report, carriers will refuse to accept lithium battery shipments.

The UN38.3 Test Summary Requirement

Since January 1, 2023, the UN Manual of Tests and Criteria requires manufacturers to provide a Test Summary for lithium batteries offered for transport. This is one of the most significant recent changes affecting battery logistics.

The Test Summary must include the following information as specified in Section 38.3.2.2 of the UN Manual:

• Name of cell/battery manufacturer

• Cell/battery identification (model number)

• List of tests passed and reference to the testing laboratory

• Name and signature of the responsible person

• Date of issue

The Test Summary must be made available upon request to regulators, carriers, and other parties in the supply chain. Testing partners such as GTG Group can issue the Test Summary alongside the full UN38.3 test report to ensure complete transport compliance documentation.

Packaging and Labeling Requirements for Transport

Even after obtaining UN38.3 certification, batteries must be packaged and labeled according to the specific transport mode regulations:

UN Number Classification

• UN3480 — Lithium ion batteries (shipped standalone)

• UN3481 — Lithium ion batteries packed with equipment

• UN3481 — Lithium ion batteries contained in equipment

Key Packaging Rules

• Batteries must be packed to prevent short circuits (individual protection of terminals)

• Inner packaging must prevent movement and contact between batteries

• Outer packaging must meet UN performance standards (drop test, stacking test)

• Lithium battery handling label (hatched edge border) must be displayed on outer packaging

Air Transport Specific Restrictions

Air transport of lithium batteries faces the most stringent restrictions among all transport modes:

• Passenger aircraft:UN3480 standalone lithium ion batteries are PROHIBITED on passenger aircraft (IATA PI 965, Section IA/IB must ship on cargo aircraft only)

• State of charge limit:For UN3480 Section II shipments (≤20Wh cells / ≤100Wh batteries), state of charge must not exceed 30% for air transport

• Quantity limits per package:Vary by Section (IA, IB, II) and transport mode

• Damaged/defective batteries:Prohibited from air transport entirely under any circumstances

Maintaining Transport Compliance for Design Changes

A frequently overlooked aspect of UN38.3 compliance is the impact of product design changes on transport certification validity:

• Material changes:Changing electrolyte composition, separator material, or cathode chemistry may require retesting

• Capacity changes:Significant capacity increases (typically >20%) require new UN38.3 testing

• BMS modifications:Changes to the battery management system protection thresholds must be evaluated for impact on UN38.3 test results

Establishing a change management process that includes UN38.3 impact assessment for all product modifications is essential. GTG Group provides re-evaluation services to determine whether design changes necessitate partial or full retesting under UN38.3.

This article is AI-assisted and for reference only. It does not constitute any certification commitment or legal advice. Please refer to the latest official regulations.

Contact: 13925591357 | net04@gtggroup.com