I almost forgot... I don't know if anyone else already confirmed this, but I ordered batteries from fasttech.com and they seem legit. (far, far earlier in the thread we were speculating whether they were selling the real deal, as they are in china) My best friend got a Cera, and instead of ordering batteries from one of the usual US sources or thermovape, I ordered a pair of NCR18650PD from
http://www.fasttech.com/products/1420/10001980/1233700-panasonic-ncr18650pd-18650-36v-2900mah-rechargeabl
for approximately $14.50 shipped. Before I ordered I did some research on the website, and it turns out this site is commonly mentioned on flashlight forums (where they discuss batteries a LOT), and according to them the cells are the real deal. I don't know how I would prove conclusively that they are authentic cells, but the batteries I got for my friend perform exactly as I would expect them to from everything I have read (as compared to my CGR18650CH's).
So, basically if you don't mind ordering from china, and want your batteries for cheap, I highly recommend buying from fasttech.com because while shipping might take a few days longer than ordering from the USA (mine took 5 or 6 days), the price is about 44% cheaper than the least expensive online source I could find here (Obtronic- I paid $25 shipped for a pair of CGR18650CH versus $14 from fasttech, who were unfortunately sold out of them at the time)
Hopefully this info helps someone else save some cash.
Edit: forgot to add the link for CGR18650CH batteries:
http://www.fasttech.com/products/14...anasonic-cgr18650ch-rechargeable-2250mah-3-7v