Good chance they are LGF1 3350mAh 4.8A cells. Looks just like them, 4 posts and all. The LGF1 is commonly used in powerbanks and various battery packs. In bulk, they cost well under a dollar each.
If they just market the cells as what they really are then there would be no problems and probably have a lot of happy customers. They appear to be way better than xxxFires and also suitable for low drain applications. Then again almost anything is better than xxxFires, excluding Windyfire and maybe a few others.
They can do it this way and make way more profit without facing consequences. Honestly the majority of their customers probably don’t even know (or want to know) that the cells they received are counterfeit.
However, we still do not know what sort of cell is that. Could you please completely unwrap and carefully photograph one of the cells, Coman? So we can see its actual flat top clearly, and the cylinder markings if present.
What makes you think the protection circuit failed to open? I am pretty sure it opened up.
What happened there is the original cell wrap got torn below the cathode to anode nickel strip, causing a short-circuit. That's all folks.
Cells protected with P-channel MOSFETs do not have this problem. It has to do with the way cells are because the whole can body apart from the inner flat top is at cathode potential.
This Liitokala fraud is unacceptable. Should this forum ban all Liitokala ads and sales here? I think it’s not similar to fake lumens number of flashlight. This is misleading buyers into believing there are genuine branded cells under Liitokala wrapping.