You could also count recalls as a higher quality signal: QA, people testing, how they handle the recall & replacement, etc. Way better than not hearing anything because nobody's looking. I'm skeptical Anker is doing crazy-unique things with their manufacturing, vs. an OEM manufacturer cutting corners to save pennies.
A lot of big manufacturers have had recalls (for things like laptop batteries, vehicle batteries, the infamous Hoverboards, etc) so I wonder what Anker's batting average is compared to others. It's clearly a hard problem and squeezing in the level of density that customers expect means potentially thinner safety margins.
