What is the maximum package weight allowed for CAO (Cargo Aircraft Only) UN3090 Lithium Metal Battery shipments?

What is the maximum package weight allowed for CAO (Cargo Aircraft Only) UN3090 Lithium Metal Battery shipments?

• A. 1 kg
• B. 2.5 kg
• C. 5 kg
• D. 10 kg

Answer: (B)

The key point is the per-package weight limit for CAO (Cargo Aircraft Only) shipments of lithium metal batteries (UN 3090). For air transport on cargo aircraft, a single package containing these batteries may not exceed a net weight of 2.5 kilograms. This strict limit helps reduce the risk of fire or thermal runaway in air cargo, given the higher hazard profile of lithium metal batteries when not installed in equipment. This limit applies to standalone lithium metal batteries (not contained in equipment). Other configurations, such as batteries contained in equipment (UN 3091) or different packaging setups, have separate rules and limits. The other weight options exceed (or don’t reflect) the maximum for this CAO UN 3090 scenario, or are simply not the maximum value being tested.

The key point is the per-package weight limit for CAO (Cargo Aircraft Only) shipments of lithium metal batteries (UN 3090). For air transport on cargo aircraft, a single package containing these batteries may not exceed a net weight of 2.5 kilograms. This strict limit helps reduce the risk of fire or thermal runaway in air cargo, given the higher hazard profile of lithium metal batteries when not installed in equipment.

This limit applies to standalone lithium metal batteries (not contained in equipment). Other configurations, such as batteries contained in equipment (UN 3091) or different packaging setups, have separate rules and limits. The other weight options exceed (or don’t reflect) the maximum for this CAO UN 3090 scenario, or are simply not the maximum value being tested.