How can I show the battery as a percentage on my iPod Touch? On the iPhone, to show the percentage of battery left, I can go into Settings &gt; General &gt; Usage and toggle "Battery Percentage" on.

My daughter's iPod touch doesn't have a Usage category.  Is there a way on the iPod touch to display the battery percentage?
No iPod Touches can show the battery percentage at the top of the screen (unless you jailbreak them). There are apps in the App Store that will show the battery percentage when you run them, but obviously not all the time. 

There's a discussion thread here: http://forums.macrumors.com/showthread.php?t=1013295