IEC 62133 Battery Safety Certification Guide
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IEC 62133-2:2017 is the core safety standard for lithium cells and packs in portable electronics, usually pursued through the CB Scheme so one test report is recognized across multiple national markets. The common confusion is cell-level versus pack-level certification: a cell maker's IEC 62133 certificate does not automatically cover your finished pack, which needs its own assessment of the BMS and enclosure. Testing at an accredited Chinese lab typically runs several thousand dollars and a few weeks.
When you rely on IEC 62133, check whether the certificate is for the bare cell or the assembled pack — they are separate. We confirm the report is from a CB-recognized lab and that the tested sample matches your production configuration.
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FAQ
Does a cell's IEC 62133 certificate cover my finished pack?
No. A cell-level IEC 62133 certificate covers only the bare cell. Your assembled pack — with its BMS and enclosure — needs its own pack-level certification to be compliant.
What is the CB Scheme and why does it matter?
The CB Scheme lets one IEC 62133 test report from an accredited lab be accepted across participating countries with minimal re-testing. It saves you from paying for the same tests in every market.
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