Did a search, but no answer to my specific question. Maybe my search capability isn't good enough, but here goes: what type of usage is best for longevity of my iPad battery? Should I leave it plugged in until I need to go mobile, or should I simply use it off the grid and recharge when it runs out of oomph? I did find something on the Apple web site saying that you need to run it completely down about once per month---but this is merely to keep the battery charge indicator calibrated. Can anyone shed light on this issue? Thanks.