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« Last post by Zenith on Today at 09:00:26 pm »
I bought half a dozen 18650 cells on AliExpress back in the day - 5 years or so back. They were quite cheap. The sellers had good feedback and they appeared to be, according to my charger/analyzer, perfectly good Panasonic 18650 cells. I'm still using them in flashlights.
There were a few suppliers on ebay, who seemed to know what they were selling, and didn't sell 10,000 mAh obvious rubbish. They tested what they were selling and didn't sell tat. I believe ebay got the wind up over the dangers of Li-ion cells, which they they thought were all 18650s and stopped 18650s being sold on their site, although other Li-ion cells could be sold. I haven't looked recently.
These days, if I wanted more, I'd enter "buy 18650 UK" into Google and pick a reputable looking supplier, of which there appear to be several. You can probably buy then from Farnell etc, in which case they are unlikely to be junk.