Learn how to determine if the iPod AC adapter is functioning correctly:
When your iPod is connected to an electrical outlet using the iPod AC adapter, an animated battery icon with a lightning bolt should be visible in the center of the iPod's screen. If you do not see this icon and suspect that the AC adapter is not charging iPod's battery, connect your iPod to your computer's built-in FireWire or high-powered USB port. You should see an animated battery icon with a lightning bolt appear in the upper right corner of iPod's screen. This icon indicates the battery is charging.
If the animated battery icon appears when connected to the computer, leave iPod connected for several hours to charge the battery. Note: iPod will not charge when connected to a computer that is turned off, or is in sleep mode.
If the animated battery icon does not appear when connected to your computer, See: "iPod: Does Not Charge" for further assistance. | 
