Which UN number corresponds to lithium ion batteries contained in equipment?

• A. UN 3480
• B. UN 3481
• C. UN 3090
• D. UN 3091

Answer: (B)

The main idea here is how batteries are classified for transport based on whether they are built into or installed in a device. When a lithium ion battery is contained in the equipment, the shipment is evaluated and labeled under the designation that indicates it is inside the device itself. This distinction matters because the way packaging, handling, and safety measures are applied changes depending on whether the battery is inside a device or shipped separately.

Why this is the best fit: the designation for lithium ion batteries that are inside the equipment directly communicates that the battery is not being shipped as a loose, standalone item but as part of the device. That status affects the regulatory requirements, including packaging and labeling, and aligns with the safety protections provided by the device itself.

In contrast, other designations cover different scenarios, such as lithium ion batteries that are not contained in equipment (shipped separately) and lithium metal batteries, which have their own separate rules. Understanding this distinction helps ensure you apply the correct rules for how the shipment is prepared and transported.