Their 20,000 mah battery charger works exactly as advertised, has exactly the charge we expect, keeps working few years after purchase just as new.
So, to end suspense - what are actually high end manufacturer(s) in this area? I don't mean gucci-style appearance or some useless branding inflating the price, I mean actual internals.
I now love and trust Anker.
I showed that when the SmartQ q7 tablet computer was plugged into my PC's USB port using the cable my PC threw a warning about excess power drain, but when another cable was used, it did not throw an error. I proved that by recording a cell phone video.
I might have also used a USB power meter but I do not remember.
Here is more on the ancient tablet: https://www.engadget.com/2009-05-27-smart-q7-reviewed-deemed...