In a nutshell, he just inserted two apple mini usb plugs into the outlets and tucked them back in the wall, but you could soldier the wires to the chargers if you have the skills to go that route.

Using a voltage regulator, a USB jack, an old USB charger, and a few other parts, Noise Maker built a USB charger that plugs into the power source with clips instead of a plug. After a lot of ...