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Re:It's not bad to leave your laptop plugged in by grogers on Friday February 26, 2010 @01:12PM (#1153705)
Not exactly a law, but: http://en.wikipedia.org/wiki/Principle_of_least_astonishment

If your laptop battery suddenly started dropping towards zero charge when it was plugged in, you wouldn't be at all concerned? What if you needed it at full charge to take it somewhere?

Re:It's not bad to leave your laptop plugged in by Tichy on Friday February 26, 2010 @02:32PM (#1153920)
Then at least the OS should give me a little reminder icon, "you haven't discharged your battery in n weeks". I see what you mean, but it seems unlikely that is the reason?