Hi there avk111!
I have some articles here that will provide some information about batteries in our iOS devices. These will help you understand a little more about your battery and the way the operating system reports the battery's status. These articles are mostly referencing the batteries installed in iPods instead of iPads, but the advice and information is still relevant to the iPad. The first article I can provide can be found here, and is an FAQ about batteries:
iPod battery frequently asked questions (FAQ)
http://support.apple.com/kb/TA26689
There is also an article that can help you extend your battery life in your iOS device, and can be found here:
iPod: How to extend battery life
http://support.apple.com/kb/ht1726
Take care, and thanks for visiting the Apple Support Communities.
-Braden