I wrote about a Samsung cube charger here: http://www.righto.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html http://www.righto.com/2012/10/a-dozen-usb-cha

I wrote about a Samsung cube charger here: http://www.righto.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html http://www.righto.com/2012/10/a-dozen-usb-chargers-in-lab-ap... The short answer is it is slightly less complex than the Apple charger, with a completely different internal design, and it performs about the same.