From the Manufacturer
Use an iPod FireWire Power Adapter for home, office or travel. The FireWire based adapter allows you to charge your iPod when not connected to a computer. Just plug the adapter into a wall outlet and connect either a 6-6 pin FireWire cable (iPods without dock connectors) or an iPod Dock connector to FireWire cable (iPods with dock connectors) to your iPod for recharging.
NOTE: The iPod FireWire Power Adapter is only for use with iPod. Do not plug the iPod FireWire Power Adapter into any other FireWire device. For more information on using this product, refer to the online iPod Help in iTunes.
iPod Compatibility
Product Description
Use an extra iPod Power Adapter for home, office or travel. The FireWire-based adapter allows you to charge your iPod when not connected to a computer. Just plug the adapter into a wall outlet and (depending on model) connect a 6-6 pin FireWire cable or iPod Connector to FireWire cable to your iPod for recharging.