I have this app gravity clock that I use as my alarm since someone at apple had the great idea of leaving the clock.app out. So normally I set the alarm and turn off the screen, but I am really loving the clock itself. So I wanna put in the charger cable, open the app and have the gravity clock showing all night long, every single night. Will this drastically mess up the ipad's battery, or should I be fine having it on during night 365 days a year (well, that's only for one year since I'm buying the new iPad next summer hehe). Hope someone with some good knowledge on batteries can help me out..