While I appreciate you posting new battery sources, I am not going to list every ebay seller of batteries out there. First of all, we have no idea if they are real or fake. Second, they provide very little information about the batteries and Third, they advertise inflated capacity. Both cells you linked look like they have protection, but no mention is made in the description (unless I missed it). For both of these, I sent an email to the seller asking them:
What is the underlying cell manufacturer (under the wrapper)?
How as 5000mAh cell capacity determined? Do you have test data?
Does this cell have a protection circuit?
I am getting to the point where I want to start boycotting anyone that sells fakes, including DX, DD or anyone else we find doing it, and I think we should start calling them out when we catch them. ebay is especially notorious as a source of counterfeits, trouble is, there is no way to really call them out - just too numerous.
I think it would be easier to bold, highlight or asterisk those vendors whose cells actually DO meet claimed specs. That seems easier to manage than trying to corral all the new fraud sellers that seem to pop up every week... IMHO of course.
Got my Keygos 26650s in 11 days, not bad at all. They definitely are protected, the first one had a 4.0V charge and fit in my Xtar WP II to charge with no problem.
Curious... was that 3.3V measured with a meter or the voltage display on the charger? I am just wondering because my charger is .15V off from my Fluke. So the charger will cut the discharge at 3V but it actually is more like 3.15V.
Oh OK then... It probably wouldn't hurt to meter the voltage just to double check. If your 3.3V is more like 3.45 (like it is with my charger) then the protection circuit is not really letting the cell run to its fully discharged capacity. So... it could be a 4-4.5Ah cell, with a 3Ah protection circuit.
I've cycled the first cell 3 1/2 times, once at 1A charge/discharge for ~860mah. I switched to 0.5A charge/discharge for 2nd and 3rd cycles. 4th charge I got ~1350mah in. Running discharge now.
Going to try the other two cells tomorrow and if they're all like that I might have to talk to the seller...