EU: CE certification, ROHS certification, 206/66/EC
United States: FCC certification, UL certification, this can only be aimed at one model (different models need separate certification), and the price is relatively expensive.
Japan: PSE certification
Korea: KC certification
Taiwan Province province: BSMI certification.
Considering safety, some customers will do IEC62 133, which is a safety test.
UN38.3+MSDS is required for transportation, and both of them are required for sea and air transportation, especially now that battery control is more and more strict.