[microtherion]

Ken Shirriff's charger teardowns show that there can be vast differences in quality and safety between different brands: http://www.righto.com/2012/10/a-dozen-usb-chargers-in-lab-ap...

[henriklied]

Also check out Lygte Info[1], the site of a Dane who checks chargers and batteries usually bought from the Chinese sites like Banggood and AliExpress. Spoiler: Not all of them are bad.

[1] https://lygte-info.dk/info/indexUSB%20UK.html