Works very nicely with all my gadgets and enabled me to put a plethora of different "wall warts" away in a drawer. Judging by the total absence of any discernible heating, it is pretty efficient from no load to full load conditions, and there are no pointless indicator LEDs wasting energy. Only negative is that I would have preferred two C connectors. There is another version from the same manufacturer that offers this but it does not support the latest PD fast charging standard. The USB industry really does need a better way of communicating device compatibility across the appalling mess that the "standards" have got into on power over USB - I am very technical, but this purchase was largely intuition since I could not find a proper specification of the charging standard used for "any" of my devices! It is all very well warning us that this charger does not support Qualcomm QC2, but what use is that if you cannot find out whether your device needs this?