Okay, first I'll admit that I'm "old school". I can't seem to break the habit of "battery memory phobia" which is a fear that unless you run your battery way down then fully charge you are running a risk of teaching your battery bad habits. As a result, I don't charge my iPad until sometime after I get the low battery warning at 20%. I've come across posts from people who charge every night ... even if they're at 80% or more. So my questions are, (1) is it okay to charge regardless of present charge or should I continue my present practice? (2) Is it harmful to overcharge? i.e., can I leave it plugged in for hours after it reaches 100%? Any other charging comments will be appreciated.