Lithium Battery Certifications Explained: UN38.3, IEC62133, UL, CE and More
Which certificates does your battery actually need to ship and sell? A plain-English map of transport, product-safety and regional certifications — and how to plan them.
Two kinds of certification
Which certifications do I need?
Transport: UN38.3 (non-negotiable)
Product safety: by application
| Standard | Scope |
|---|---|
| IEC62133 / IEC62133-2 | Portable sealed secondary cells & batteries (global baseline) |
| UL2054 / UL1642 | North-America household & commercial batteries / cells |
| IEC62619 / UL1973 | Industrial & stationary energy-storage cells & systems |
| IEC60601-1 | Medical electrical equipment (device-level) |
| UL9540 / UL9540A | Energy-storage systems & thermal-runaway fire testing |
Regional market access
| Market | Mark / scheme |
|---|---|
| European Union | CE (often via IEC62133) |
| United Kingdom | UKCA |
| South Korea | KC |
| Japan | PSE |
| India | BIS |
| Global scheme | CB (IECEE — eases multi-country acceptance) |
How to verify a supplier's certificates
- Ask for the actual test report, not just a logo — UN38.3 has a Test Summary; product-safety marks have certificate numbers.
- Check the certificate covers your exact cell/pack model, not a similar one.
- Confirm the issuing lab is accredited (e.g. an IEC CB-scheme NCB or a recognised test house).
- For stationary storage, ask specifically about IEC62619 / UL1973 and UL9540A fire testing.
Frequently asked questions
Is UN38.3 mandatory?+
Effectively yes for shipping. UN38.3 is required to transport lithium cells and batteries by air and for most sea and road freight. Without it you generally cannot legally air-freight the product.
What's the difference between UN38.3 and IEC62133?+
UN38.3 is a transport-safety standard (is it safe to ship?). IEC62133 is a product-safety standard for portable batteries (is it safe to use?). Most products need both — they're separate tests.
Do home energy-storage batteries need special certification?+
Yes. Beyond UN38.3, stationary storage typically targets IEC62619 or UL1973 for the cells/system, and increasingly UL9540 / UL9540A for system safety and thermal-runaway fire testing.
How do I confirm a battery is really certified?+
Ask for the test report and certificate number (not just a logo), check it covers your exact model, and confirm the issuing lab is accredited. Reputable manufacturers provide this documentation on request.
