In this article at Macworld, now updated for the third-generation iPad, Dan Frakes runs down all the possibilities for charging an iPad — wall chargers, high-power USB ports, and low-power USB ports. If your iPad takes longer to charge than you think it should, make sure you’re using the right port and giving it sufficient time. follow link
How to Know Your iPod Model
If you have an old iPod but aren't sure exactly which model it is, check the info at the Web page linked below. You'll find lots of photos and information that will help you determine exactly which model you have.
Visit Identifying iPod Models
- ExtraBITS for 2 April 2012 (02 Apr 12)
Dan Frakes Explains iPad Charging Issues at Macworld