I try and keep my laptop plugged as much as I can to keep my battery in good condition for when I have to take my laptop out of my home and away from any power sockets. I've recently downloaded Lion and have noticed that the lock screen always says it's 97-99% charged even though the desktop says it's 100% charged. Is my laptop secretly leaking out power and therefore constantly being charged or is this just a visual bug? I have MBP 13" 2011 Thanks!!