Which type of Lithium batteries are allowed on passenger flights?

The indication that any UN number not ending in 0 is permitted on passenger flights aligns with the regulations governing the transport of lithium batteries. The UN numbers categorized for lithium batteries are structured to denote specific types and their associated risks.

In this context, lithium metal batteries, which fall under UN numbers that typically end in 0, are subject to stricter regulations due to their inherent fire hazard when damaged or improperly handled. Therefore, allowing batteries with UN numbers not ending in 0 suggests that these are specifically lithium-ion batteries, which are generally deemed safer for transport under certain conditions.

Lithium-ion batteries have different performance characteristics and safety profiles compared to lithium metal batteries. They are more widely used in consumer electronics and are often allowed in passenger aircraft because they are less prone to igniting under normal circumstances. The key regulatory focus is ensuring safety during transport, and the allowance of lithium-ion batteries on passenger flights reflects an understanding of their characteristics.

This distinction ensures that while lithium batteries pose risks, the type and classification of these batteries are critically evaluated to maintain safety and compliance with aviation regulations.