Just thought I would pass this along to any new people to the board. About a year ago I bought some Ultrafire 3000mah 18650's off ebay for about $3 ea shipped. They turned out to be about 2250mah but for the price I didn't complain too much. So about 6 weeks ago I ordered some more some protected and some not, 2 separate sellers on Ebay. I got out my Imax B6 charger and did some discharge tests at 1A and1400mah was the best. A couple where dead and some came in at about 70... yes 70mah. I opened them up and this is what I found. NONE of them match!
Clearly recycled, old spot welds where ground off. The unprotected batteries where not even 18650's they had some weird thick plastic cover to make them thicker.
These things could be really scary in a multi cell flashlight! I did get a full refund from both sellers, so if you get any fakes by all means ask for a refund and let other people know, these batteries are to dangerous to play around with.