IEC 62133: the cell safety standard behind portable applications
IEC 62133 is the safety standard for sealed portable secondary cells and the batteries built from them. Part 2 covers lithium systems, and it is the reference for portable equipment rather than for stationary or industrial installations.
| Field | What it says |
|---|---|
| What it is | IEC 62133, safety requirements for sealed portable secondary cells and batteries; Part 2 covers lithium systems |
| Applies to | Portable applications — equipment meant to be carried or moved by hand in normal use |
| Typical tests | External short circuit, overcharge, forced discharge, mechanical and thermal abuse, and abnormal charging conditions |
| What the buyer receives | A test report, often issued under the CB scheme as a CB test certificate |
| Not for | Stationary storage and industrial installations — those are covered by IEC 62619 |
| What to check | The current edition, and that the report names the cell type rather than only the finished product |
Specification basis: the standard text and its current edition. Figures and dates quoted on this page are limited to what each document states, and no certificate is claimed beyond what is held on file.
Portable is the boundary that matters
The standard is written around portable use. If the pack is going into something carried or wheeled by a person, IEC 62133 is usually the reference. If it is going into a rack, a container or a fixed installation, the applicable standard is IEC 62619 instead.
Getting this boundary wrong is a common and expensive mistake: a test report against the wrong standard does not answer the question the end customer or the insurer asked.
What the tests are really about
The test programme asks what happens when the cell is abused in the ways abuse actually occurs: shorted externally, charged past its limit, driven into discharge, heated, dropped, crushed. It is a safety floor, not a performance figure — a cell can pass IEC 62133 and still be the wrong grade for your load profile.
How it reaches a buyer
Reports are commonly issued under the IECEE CB scheme, which lets a test report be recognised across member countries. What matters to a buyer is that the report names the cell or battery type being supplied.
Before you accept a document
How to check it
- Confirm whether your application is portable or stationary before asking for a standard by name.
- Read the model designation in the report, not just the manufacturer name.
- Check which edition the report was issued against; the current edition is what an auditor will ask about.
Questions
IEC 62133 in practice
Is IEC 62133 a legal requirement?+
Is Part 1 relevant to lithium cells?+
Can it cover a pack rather than a cell?+
This page describes how each standard is applied in practice when lithium cells are bought and shipped. It is a summary for procurement, not the standard text itself, and it does not replace your carrier's acceptance check or your own compliance review.
Related
The other standards
Need to know what is held for a model?
Send the designation. The answer is which documents exist, which are on file, and which would have to be obtained.