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UN38.3 Certification
UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Chapter 38.3- UN38.3 Certification.
To ensure the safety of air transportation and meet the transportation needs of customers for goods containing lithium batteries, according to the relevant provisions of the International Air Transport Association's Dangerous Goods Regulations, a rechargeable lithium battery operation specification, UN38.3 (UNDOT) testing, has been developed.
According to civil aviation regulations, airlines and airport cargo collection departments should conduct a transport document review of lithium batteries, with the most important being the UN38.3 safety inspection report for each type of lithium battery. This report can be provided by third-party testing agencies designated by civil aviation (such as Dephua Testing) or by battery manufacturers with testing capabilities. If this test report cannot be provided, civil aviation will prohibit the transportation of lithium batteries by air.
UN38.3 refers to Section 38.3 of the United Nations Manual of Tests and Standards for the Transport of Dangerous Goods, which requires that lithium batteries must undergo high simulation, high and low temperature cycling, vibration testing, impact testing, 55 ℃ external short circuit, impact testing, overcharge testing, and forced discharge testing before transportation to ensure the safety of lithium battery transportation. If the lithium battery is not installed together with the device, it must also pass a 1.2-meter free fall test.
UN38.3 certification mark

UN38.3 Certification Product Scope
- Various types of lithium secondary batteries (such as power car batteries, electric road vehicle batteries, electric tool batteries, hybrid vehicle batteries, etc.)
- Various types of phone batteries (such as lithium ion batteries, lithium polymer batteries, etc.)
- Various types of small secondary batteries (such as laptop computer batteries, digital camera batteries, camera batteries, various cylindrical batteries, wireless communication batteries, portable DVD batteries, CD and MP3 player batteries, etc.)
- Various types of primary batteries (such as lithium manganese batteries, etc.)
UN38.3 Certification Test Items
- T.1 Height simulation test
- T.2 Thermal test
- T.3 Vibration test
- T.4 Impact test
- T.5 External short circuit test
- T.6 Collision test
- T.7 Overcharge test
- T.8 Forced discharge test
Criteria for Determining Test Qualification
- a. T.1-T.4No mass loss, no leakage, no exhaust, no disassembly, no rupture, no ignition, open circuit voltage not lower than 90% before testing
- b. T.5-T.6 The surface temperature should not exceed 170 ℃, and there should be no disintegration, rupture, or ignition within 6 hours of testing
- c. T.7-T.8 No disassembly or ignition within 7 days of testing
Packaging Requirements and Condition Limitations
If the lithium battery and lithium battery group meet all the following conditions, they can be transported as non-restricted items (non-dangerous goods). If any of the following conditions cannot be met, the dangerous goods transportation requirements of UN3090 or UN3091 should be followed:
Restrictions on Lithium Content
- 1. For metal lithium or lithium alloy primary batteries, the lithium content shall not exceed 1g; for lithium ion primary batteries, the rated watt-hours shall not exceed 20Wh.
- Note: Primary batteries are also known as battery cells.
- 2. For metal lithium or lithium alloy batteries, the total lithium content shall not exceed 2g; for lithium ion batteries, the rated watt-hours shall not exceed 100Wh.
- Note: The "lithium content" referred to above means the amount of metallic lithium on the anode of the lithium metal or lithium alloy battery.
- For metal lithium or lithium alloy primary batteries or batteries, the "lithium equivalent content" is calculated by multiplying 0.3 by the rated capacity in ampere-hours. For example, the "lithium equivalent content" of a certain mobile phone lithium ion battery with a rated capacity of 800mah (800 milliampere-hours) is: 0.3 X 0.8 (ampere-hours) = 0.24 grams.
Compliance with UN Test Requirements
Each type of primary battery and battery has been tested and proven to comply with all the requirements of Annex III, Part 38.3 of the United Nations Dangerous Goods Transport Regulations.
Packaging Requirements
- 1、 Unless installed in devices such as mobile phones, cameras, walkie talkies, laptops, etc., batteries and primary batteries must be individually packaged to prevent short circuits and placed in sturdy outer packaging.
- 2、 Unless installed in equipment, each package containing more than 24 primary batteries or 12 batteries must also meet the following requirements:
- 1) Each package must be marked to indicate the presence of lithium batteries and the special measures to be taken when the package is damaged.
- 2) Each shipment must have a random document explaining the presence of lithium batteries in the packaging and the special measures to be taken when the packaging is damaged.
- Each package must be able to withstand a 1.2m drop test in any orientation without damaging the batteries or cells inside the package, without changing the position of the batteries to the point where they come into contact with each other (or primary batteries to primary batteries), and without any leakage of batteries from the package.
- If the battery is transported separately, the gross weight of each package shall not exceed 10kg
UN38.3 Test Revision to Eighth Edition
The United Nations TDG Regulations, Revision 23, formally introduced dedicated entries for sodium ion batteries and related equipment: UN3551 and UN3552. Similar to lithium batteries, sodium ion batteries also need to pass the UN38.3 test before transportation. Therefore, the United Nations Test and Standard Handbook, Eighth Revision, also revised Chapter 38.3, adding Section 38.3.3.2 "Testing of Sodium Ion Batteries and Battery Packs," and specified detailed testing requirements for sodium ion batteries.
38.3.3.2 Testing of Sodium Ion Batteries and Battery Packs
When testing sodium ion batteries and battery packs, the following steps must be followed:
(a) Testing of rechargeable sodium ion batteries and battery packs according to test T1 to T5, the number of batteries to be tested shall be determined by the test instructions.
- 1. Five batteries in their fully charged state after the first charge and discharge cycle;
- 2. Five batteries in their fully charged state after the 25th charge and discharge cycle;
- 3. Four small battery packs in their fully charged state after the first charge and discharge cycle;
- 4. Four small battery packs in their fully charged state after the 25th charge and discharge cycle;
- 5. Two large battery packs in their fully charged state after the first charge and discharge cycle;
- 6. Two large battery packs in their fully charged state after the 25th charge and discharge cycle.