I made a purchase with them. Later I looked them up on WHOIS only to find they set up this website Jan 2015, just 2 weeks before my order in Feb. WHOIS says they are in New York, but PayPal showed the money goes to China. This website is a clone of laptopbattery-fan.co.uk which also has a mountain of bad reviews.
Update: After filing a dispute with PayPal, they contacted me with an email in broken English saying my order was shipped. This was 3 weeks after ordering it. It had a tracking number. When I checked the tracking number on USPS I found it wasn't actually shipped. It was just a label that had been printed. Three days after the label was printed, the package was received by USPS. They claimed USPS has a 3 day delay in their reporting of tracking shipments, which is BS. It eventually arrived 3 days after that.
I will never use them again. They are slow and they outright lied about it being shipped. If I had known they were really in China to begin with I never would have ordered from them in the first place. The product was OK though.