Hello MacRumors, I have been doing some work on my 2010 MacBook for the past few hours with the laptop plugged in - I haven't used it on battery, at all, for the last few days. A few minutes ago I noticed that the light on the power adaptor has turned orange and OS X's battery indicator says "1:56 until full". This has happened a few times before, but I always thought I just used it on battery at some point and forgot about it. This time, however, I am absolutely certain that I haven't unplugged it for a second and that the indicator light was consistently green up to this point. "Battery Health" says that current charge is 71% and battery health is 91%, number of cycles is 252. Has this happened to anyone else? Could this be a sign of battery failure?