I'm sorry that happened to you. I've seen tempting deals on alibaba but I'm not sure I'd be brave enough to spend $16k. In this case, these Weize batteries are being sold on Amazon which presumably would honor the return policy. I was fully expecting to get a broken or fake battery and return it. I mean I see what you are saying, but I actually ordered two of them, received them, and tested them and so far so good. I think one of the main points of this forum is for us to post our actual experiences with different brands to inform the community of good or bad products and I appreciate your warning about TAICO.
In the manual, the email address
inquiry@weizeus.com is listed and the phone number (470)-300-9457. I haven't tried to contact them because I haven't had any issues whatsoever, but I don't think it's fair that since you were unhappy with your purchase from TAICO that you think this applies to all "these companies".