Welcome to the Apple iPad Forum, your one stop source for all things iPad. Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
The one it came with. Also you can buy additional cords, just be sure it says IPAD not ipod.
You can get cords cheaply (several dollars) at Amazon or WalMart that work great but avoid the ones from dollar stores. My experiences is that they don't last for long.