There was one person who wrote deep reviews of things like chargers and battery packs (I think) on Amazon, checking for standards compliance and design safety. Does anyone remember who?
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Not on Amazon, but Ken Sherrif has dome some superb teardowns and analysis of Apple and non Apple chargers
http://www.righto.com/2012/05/apple-iphone-charger-teardown-...
http://www.righto.com/2016/03/counterfeit-macbook-charger-te...
Benson Leung? He was famous for his reviews of USB-C products.