ipad cannot charge!

If you've replicated the failure with multiple cords and multiple chargers then it's opssible that the port on your iPad has gone bad. Make an appointment with the apple store or take it back where you got it (for example I took mine back to best buy when it did this, they troubleshot, replicated it and exchanged my iPad.

no promises but it's something to be checked out by the professionals

The quickest way to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter. When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge, but only when it's in sleep mode. Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.

At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes.

 Cheers, Tom 😉

If it is the USB that's bad, and the iPad is less than a year old then it should be covered under manufactuer's defects and repaired/replaced. You'll have to talk to Apple or where they bought it and go from there.