At least three categories: ① UN38.3 transport testing (8 tests, mandatory; without it, freight forwarders will directly refuse the shipment); ② destination market safety certification (EU IEC 62133 / EN 62133, US UL 1642 / UL 2054 / UL 1973, China GB 31241); ③ destination market complete-product compliance (EU CE including Battery Regulation (EU) 2023/1542; US FCC, exempt if no wireless function). In addition, MSDS and air/sea transport identification documents are required.
UN38.3 only proves transport safety, not product use safety—these are two different things. Many companies submit UN38.3 reports to customers as "battery certification" and are then asked to additionally provide IEC 62133.