08-06-2015, 11:26 PM
BernDog wrote:
Isn't this one the same for $2 less?
http://www.amazon.com/gp/aw/d/B00GTGETFG..._2?ie=UTF8&refRID=14E2H46M6ACNJBYN44CK
According to this chart, the one for $20 is more energy efficient (the $18 model is 3rd, the $20 model is 4th).

The model selling for $18 is still a great charger, though.