@overcharge91772 you are absolutely right. Counterfeit batteries seems to be the biggest plaque out there right now. The bad thing about this is that there really is no good way in determining who is good and who is not. Which puts us all in the same predicament. Once you have a known good supplier you do want to stick with them and purchase sort of exclusively from there, just like most of us do.
Now for recommending where to purchase one from in your country, that has its own drawback. Recommendations will always be subjective. Just because I have had good experiences with a certain seller, does not guarantee that you will. so we try to stay away from that. What I do recommend, is that you see which supplier the fixers in your part of the world use. People like @tech_ni or @hellomacos might be able to speak to it. Also, try the repair cafe's in your area. Those volunteers are a great source of information as well as https://therestartproject.org/about/ Try to get in touch with them, since they are awesome in trying to tackle the climate emergency by decreasing eWaste. You may not get a definite answer but you may get a good lead.
I know it's a lot of work to do all of this. At least you can be reasonably sure that you are getting an objective answer. Thank you for caring about our planet and for being conscious of our environmental issues.
Repair is War on Entropy!