December 06, 2012, 5:29 PM — Here's how you can see the percentage of battery life left in your devices when connected to iTunes.
1. Open the iTunes application.
2. Make sure your devices are connected.
3. Click the Devices button in the upper right corner of iTunes.
4. A menu will appear with all of your devices listed, along with their battery status.
For more, see the original article at the link below.
The Ultimate List Of iTunes 11 Tips, Tricks And Changes | Cult of Mac