What UN38.3 Tests For
The UN38.3 test protocol validates that a lithium battery can withstand altitude simulation, thermal cycling, vibration, shock, and short-circuit conditions without posing a transport safety hazard.
Why It Blocks Shipments Without It
Freight carriers and customs authorities require UN38.3 test summary documentation before accepting lithium battery-containing cargo — a missing certificate is one of the most common causes of shipment delays for wearables, trackers and other battery-powered electronics.