I'm trying to get a company approved to sell portable batteries on Amazon and it is pretty strict. Amazon requires testing reports that meet the UL 2056(?) cert

I'm trying to get a company approved to sell portable batteries on Amazon and it is pretty strict. Amazon requires testing reports that meet the UL 2056(?) certification or something. I don't know whether they require this for all electronics but as an Amazon seller, it seems to me they are very intense about quality and customer satisfaction. Another example is that I helped someone with a product launch for headphones that ended up having a little over 6% return rate. It was flagged by Amazon within a week. However, what I have also learned is that there are many Chinese sellers that have also learned how to game the system.