5 - 10% per hour is not normal. I've been using my touchpad since I came home from work so approximately 6 hours. It was on the charger, turned off before I came home. I have applied the kill logging patches, and all the common speed up patches, and am running the latest F4 Phantom kernel that was released today with an OC to 1.728 GHz. My WiFi is always on but my BT is not. My battery dropped 14% over that time period, or just over 2% an hour (with irregular use, not just sitting there).
Have you done all the patches in Preware and what not?
Motorola DROID RAZR HD
iPad 4G (Verizon) 64GB