Step 1: Things Needed
Materials: you'll need a car charger that has an output of 5v. find one that has the same diameter cord as your usb cable. the little collar will go on easier.
You also a usb extension cord. if you can find just the female end thats fine cause its all you'll need.
Step 2: Dissasembly
remove the board inside and identify the positive and negative wires. mine are red and black. red is positive and black/white is negative. sometimes they are labeled. If not you can use a volt meter but i didn't cause i do not own one.
De-solder the positive and negative wires from the back. (the green side)
make sure that the solder doesn't touch anything it was not touching before. the holes need to be open for your new wires to go into.
Step 3: Prepare the Usb Cable
push on the little collar from the other cable. sometimes it can be hard if the collar is long so i imagine you could use some oil but you will have to wash off the oil.
strip about 3/4 to and inch off the usb end.
the green and white wires are data send/receive so you can cut those ones off.
Step 4: Putting the Two Together
trim any excess copper wire off with your wire cutters.
add a drop of super glue to the end of the plastic coating on the usb cable and slide the little collar up so that it gets glued into place. you may not need to put any super glue on yours but i did.