Which UN number is assigned to Lithium Ion Batteries?

• A. UN3090 Lithium Metal Batteries
• B. UN3299 Lithium Ion Batteries
• C. UN3480 Lithium Ion Batteries
• D. UN3490 Lithium Ion Batteries

Answer: (C)

UN numbers identify the specific dangerous goods and their handling requirements. For lithium‑ion batteries, the standard designation is 3480, which covers lithium‑ion cells and batteries shipped on their own. This reflects their chemical makeup and hazard profile, primarily the risk of short circuits and thermal runaway if damaged or improperly handled.

The other numbers point to different chemistries or situations: lithium metal batteries have a different UN number, and the remaining options do not represent lithium‑ion batteries in the general sense. In practice, lithium‑ion batteries may also be listed under a related number when they are contained in or packed with equipment (but the basic UN number for standalone lithium‑ion batteries is 3480).