I saw my first 18650 battery in the Tomtom Go 710-910 series of GPS units which came out around 2007. I have seen some units recently with what appear to still have their original battery and it still holds a charge to some extent. Changing that battery requires patience and some skill.
They tested 700ma on hobby charger. When cut I was disappointed not to find a miniature cell or white powder, just a plain low capacity cell. No matter how hard I shook it, the other missing 3300ma were never found along with vent or PTC. Over and under charge protection were also clearly printed on wrapper in engrish, lol.
@ Pilchman; Do you not have battery disposal stations at schools or big box stores like Lowes or across the pond equivalent?
Maybe even those that know these cells can't be real at 4000mAh 4800mAh 5800mAh, still hope for 3000mAh or something. Vent and protection circuit are like on different plane.
If your 18650s don’t weight 47-48 grams then you probably should toss them out. Thats the average weight of a legit 18650 cell, bet the ultraultrafires is like 20 grams
WRT Amazon destrying counterfeit inventory from their fulfillment centres it might get a bit interesting if they try to destroy Lion cells supplied by some fraudster or other.