Cited as a reference
Fake ebay batteries 18650
Why people recommend it
Linked as a warning example of counterfeit 18650 cells, opened up to reveal filler material around a tiny real cell.
Watch for: a caution about cheap cells from online marketplaces
In their words
It is mostly full of rice flour but it actually has a tiny real battery inside:
Audioguru on electronics.stackexchange.com, Nov 2021. CC BY-SA.
