I am going on a vacation overseas, and will not be taking my iPad with me, for security reasons. I'm going to turn the iPad off when I leave. I don't want to leave it plugged into a power source, even an UPS. I live in an area where storms and lightening are too common. I don't want my iPad getting toasted from a power surge. However, if the battery does run dry, is there any risk to the iPad, will I lose apps or information if this happens?