When buyers ask which certifications a lithium polymer battery needs, they often expect a short list: UN 38.3, IEC 62133-2, UL, CE, RoHS, and perhaps a country-specific mark.The problem is that these names do not serve the same purpose.
Choosing a custom LiPo battery manufacturer is not simply a matter of comparing capacity, price, and lead time. A battery that looks suitable on a quotation may still create problems during device integration, compliance testing, pilot production, or long-term supply.
A li-polymer battery needs more than a suitable voltage and capacity. Its protection system must also match the cell chemistry, series count, load current, charging method, operating temperature, and the information required by the host device.