My wife's iPad 2 is suddenly losing its charge way too quickly. The push settings are set to once every 30 minutes while the brightness is pretty low. Also, her notifications are off and the auto-lock is set to 1 minute. Basically, everything except WiFi has been turned off on her iPad, it will not stop draining. At first I thought it may be the app she is running (iAnnotate), but some of her classmates are running the same program on the same iPad model and their batteries are just fine. Any idea why it cannot keep a charge? Thanks in advance guys.