Watch out for cheap USB chargers. They can be a safety risk. Google "cheap usb charger teardown". For example http://www.righto.com/2012/10/a-dozen-usb-chargers

Watch out for cheap USB chargers. They can be a safety risk. Google "cheap usb charger teardown". For example 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...