It does state that the batteries are authentic, though. So there's that.It's a fake. Stated on his eBay listing for the item.
http://www.ebay.com/itm/SUREFIRE-X3...322147&hash=item25d96906ba:g:iwEAAOSwjk9ZTHoP
Key word being clone. Now personally, why you'd list it as a "clone" on eBay (and they frown upon listings like this) but not on your website... Feedback also reports items being as fake:
http://feedback.ebay.com/ws/eBayISA...=negative&interval=365&_trkparms=negative_365