[C4stor]

What makes you think Google chargers are any better ?

I would be surprised if there wasn't a single factory providing the same chargers with different stickers for at least a dozen of brands, including Google.

[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