iPod car chargers do the exact same thing a wall charger does, except in your car.  Typically, it plugs into your cigarette lighter and chargers your iPod while you are on the go.  However, iPod car chargers can also act as stationary docks which means they can be used and charge at the same time through your car stereo.  Car chargers do not come standard with an iPod purchase; they must be purchased separately and come in different types, bundles and sizes.  Depending on your needs, you might find it easier to buy an accessory pack with everything you need for your iPod than buying the car charger on its own.

iPod car chargers can usually be found anywhere the Apple iPod is sold.  You may not have much of a selection or be forced to buy a bundle pack of accessories, though.  If you visit an Apple-authorized retailer or Apple Store, you will find specific products to meet your car charging needs.  You want to decide if you want your iPod to do more than just be charged on the go; if you want to listen to it in the car, you need a dock, too, and that can be messy with the wires and devices everywhere.  Some car chargers act as docks as well.  They connect through your car stereo so you can listen to the music on your iPod when driving.  Many bundle packages of iPod accessories also come with a car charger.

Generally, iPod car chargers can be found at major retailers, like Best Buy, Wal-Mart and Target.  They can be found at Apple Stores, along with online via web sites like Amazon.com and others that carry iPod-based products.  It may take some time to find the right car charger for you, and if you want more from it, you may be set on getting an accessory pack, car dock or something fancier while you are using your iPod in the car.