This Instructable will show you how to take a USB Motorola Phone Charger and stick a female usb charger for charging USB devices, which in this case is an iPod.
Step 1: Disassembly
I first put the charger in vice (as pictured). I then cut the cord as close to the case as possible. After that I stuck a pair of needle nosed pliers in the hole that the cord comes out of. Then using good ol' brute strength, I pulled the pliers apart until the case broke open. The case broke very cleanly using this method.