Fake 18650 Cells drive me nuts. I consider a fake(d) cell to be any cell that has anything other than the exact capacity on or around it. So all the shit all over eBay that has 4000, 6000, 10,000mah on it doesn't exist in the real world and it's said all they are is "our" recycled cells they just rewrap or there are even reports of 18650 cells being full of sand to make them up to the correct weight. Who knows but I hope this really helps someone out there in interwebs land :)