What UN number corresponds to lithium metal batteries shipped loose?

• A. UN3480
• B. UN3090
• C. UN3481
• D. UN3091

Answer: (B)

Shippers must use the UN designation that matches how the batteries are packaged. Lithium metal batteries are non-rechargeable, and the number differs based on whether they’re loose or contained in/packed with equipment. When you’re shipping them as standalone, loose batteries, the correct UN designation is the one assigned to lithium metal batteries shipped loose, which is 3090. This signals the need for specific handling and packaging rules to prevent short circuits and fires during transport. If the batteries are contained in equipment or packed with equipment, a different UN designation applies (3091). For contrast, lithium ion batteries use 3480, with 3481 used when packed with equipment.