Step 1: Parts.
2. Any DS
3. A Spare DS Charger
4. Soldering iron and Solder (Not needed, but highly reccomended)
5. Wire Strippers or Scissors
6. Electrical Tape
7. 10-15 minutes of time.
Step 2: Cutting and Stripping the Wires.
Take the USB connector (Type 'A') and your DS connector (Lite, DSi or Phat) and strip about an inch off each wire, DO NOT cut any thing off yet.
If some wire came off when you stripped don't worry, it should still work.
There will be 4-7 different things in your USB cable, I had: String (no idea..), Foil (shielding), shielding (shielding), Data + (Green), Data - (white), Power (Red) and Earth (Black). Remove everything EXCEPT Power (Red) and Earth (Black).
Strip about 1/2 to 3/4 of an inch off of them and put to the side.
Now take your DS cable, strip about an inch off take what looks like shielding and DO NOT cut it off, separate it and twirl it (:.
There should then be a Single Cable left in the middle, strip about 1/2 - 3/4 of an inch off of it and twirl that (:
Step 3: Connecting Up.
If not ensure that a good connection is being made.
Now that you know it works solder it together and tape it up!