Before a lithium battery can take to the air, it must pass a standardized series of safety tests known as UN38.3. It is effectively the baseline compliance document that airlines and shippers require before accepting a lithium shipment.

What UN38.3 Covers

The testing protocol subjects cells and batteries to simulated transport stresses, including altitude, temperature extremes, vibration, shock, short circuit and impact. The goal is to confirm that ordinary handling does not trigger dangerous failures. Each test recreates a realistic worst-case condition that a shipment might encounter in transit.

Why It Matters

Airlines and logistics providers rely on UN38.3 as a baseline of safety. Without it, batteries cannot be shipped by air, which makes the test a practical prerequisite for global e-commerce and export. It gives carriers confidence that a package will not present an unexpected hazard at altitude.

Cells and Packs

Testing applies at both the cell and battery-pack level, and results must be documented and traceable. For manufacturers, planning UN38.3 early in product development avoids costly delays before launch. Building testability into the design from the start smooths the path to market.