Use an old cell phone charger and a usb socket extention cable to make a wall charger ( this does not come boxed with the zen micro and costs Â£30 ). This is very easy to do.
Step 1: Get a cell phone charger, one that will charge at 5 volts ( the usb voltage ) it should say this on the charger. I use one from a Sagem myV-55. Cut off phone input socket and expose the wires.