Sunday joy, Monday sorrow. I would not recommend it to anyone. In a week, you had to play with the USB to find the right position for it to charge because the plug at the back was not catching. After a while, even when fully charged, it would disconnect without charging

Very good. Charges everything while also functioning as a power bank, since it has built-in lithium batteries

I have had it for years from China, before it came to Greece. When I found it, I had very low expectations for the price, but it works perfectly and has served me well for a long time. Then I bought a second one. It is the charger for traveling and for the office!
It has one advantage that I did not find elsewhere:
It does not "consume" electricity for the screen, and I'm not saying this for economy, but for when I charge my batteries from a solar panel in the countryside.
There, a Nitecore with four slots, a screen, etc., charges slower than this simple one because a portion of the energy goes to the screen.

Update 06/2023
I also tried 21700 batteries (instead of the common 18650) and it fits and charges them normally

It lasted 1 year without any problems. After that, the cable connection didn't work well, resulting in sometimes not charging the batteries.