What are the BEST Fast Charging Powerbanks(20,000mAh or more mAh) costing within $75 or £50??

It depends on which "best" you're looking for. Since Qualcom QuickCharge 3 is just a cheap chip, most manufacturers won't skimp on that part. Anker is known for using good batteries. The only part of that particular power bank I don't like is the case - drop it and it will probably crack. Amazon doesn't seem to still carry Coocheer power banks, but the one I got from them a few years ago would probably withstand being driven over by a car.

But if you're careful with the Anker, I'd go for it - as I said, their batteries have always given me good performance.
 
It depends on which "best" you're looking for. Since Qualcom QuickCharge 3 is just a cheap chip, most manufacturers won't skimp on that part. Anker is known for using good batteries. The only part of that particular power bank I don't like is the case - drop it and it will probably crack. Amazon doesn't seem to still carry Coocheer power banks, but the one I got from them a few years ago would probably withstand being driven over by a car.

But if you're careful with the Anker, I'd go for it - as I said, their batteries have always given me good performance.

Does this generally go for all the Anker Powerbanks? I didn't know they were that fragile to drops.

I usually try to take care of all my electronics as much as I can. My 1999 Gameboy Color and 2002 model Game Boy Advance still turns on

Anyways, Is the one I mentioned the Anker PowerCore Plus 20100mAh USB C like that brittle too? It will not work after one accidental drop?