UL 1642: lithium cell safety

UL 1642 addresses primary and secondary lithium cells as components, reducing fire and explosion risk. Pack-level products typically also need UL 2054 or an end-product standard.

Why cell recognition matters

Using recognised cells can reduce pack-level testing scope, but changes in cell supplier usually trigger re-evaluation.

Standards scope summaries only. Test reports, certifications and transport classification are different outcomes; editions and market requirements change.