The black 5500mah ones? There was some discussion recently in the HKJ review thread about them- I didn’t quite understand it, but you can read for yourself. There’s a link to the aliexpress Shockli store too.
I saw an ad for these on banggood yesterday, 2 for $12 vs 2 for $18 on AE.
Not sure about the banggood ones after reading about the various 30q fakes. Someone else will know more