I bought (2) 6 aH knockoffs for my DeWalt tools in 2020. I didn't even realize they were from a Chinese vendor until I saw the preapproval on PayPal. Funny thing is, that was the only thing I saw from them. No shipping notice... and no actual payment withdrawal. I've been using them for 4 years, one has started giving me problems so I just ordered 2 more from a different vendor, which supposedly are genuine DeWalt's. We'll see when they get here.I've had good luck with off brand replacement batteries for my Dewalt tools. They are a lot cheaper and generally work ok. That's another reason to stick with the better known tool makers - it's more likely you can get off brand replacements.