Setting my power button and keyboard closing to sleep mode does not work around this problem for me. It still drops down to 73 or 75% in a very short time. I had it plugged in for more than a day yesterday and hadn't used it for just as long, and when I woke it up, even though it had been plugged in (and still was plugged in) for hours and hours, it came up at 73%. And yes, the light on the plug was lit all that time. I unplugged and re-plugged it in and it was back to 100% in an hour or so.