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 Make an iPhone Screenshot
Want to take a screenshot of something on your iPhone or iPod touch? Press the Home button and Power button briefly at the same time, and an image of your screen will be saved to the Photos app (and will sync with iPhoto when you next connect). Don't hold the buttons too long or your device will either power down or reboot.
- ExtraBITS for 2 April 2012 (02 Apr 12)
Dan Frakes Explains iPad Charging Issues at Macworld