I have an hP laptop with an Lithium battery and once a month I do a battery check. If the report says the battery is ok I leave it. If it tells me that the battery needs calibrating then I do that. I have been using Lithium batteries in devices since the late 90's and every device I have used needs calibrating on a regular basis. If you do not do that then you will get inaccurate readings. It is not just Microsoft, it is other devices as well. Although I must admit I have never calibrated the battery in my IPad 2 and quite frankly do not know if I need to.You aren't understanding what I'm saying. It has everything to do with Microsoft and Windows as other operating systems are touting "ease" and "just working" (Apple-esque) and you're advocating asking users to calibrate their batteries monthly.