Fonken contacted me and stood behind their warranty; they replaced the defective devices promptly...OUTSTANDING!

Reliable and fast charging with compatible devices.

A simple statement in the product description that the unit produces 5V 1A for incompatible devices would have saved FONKEN a poor review and Amazon and me the time, inconvenience and expense of a return

Works great at fast charging the Samsung Galaxy S7 and other USB devices.

Works fine with any device capable of quick charging

I bought these for my quick charge 2.0 device and they indeed do work for those as well as 3.0 devices

Today, deep in the questions I see that it appears to put out 5V 1A for non-Qualcom 3.0 compatible devices

these look like fine chargers that are likely quite good for Qualcom 3.0 compatible devices.

These are perfect for fast charging devices like my Pixel phone and my wife's iPhone.