Hello All, I got a late 2011 MacBook Pro 15 (quad core 2.4 Ghz i7, 8 GB & 6770m) in October. I've noticed since the day I got it that if I encode video with handbrake or play Civ 5 that the battery will actually discharge while plugged in. Using iStats I can see that the power supplied to the system is negative. I assume that this simply means that the system is using more than the 85w adatper can supply. If this is true, this is a HORRIBLY designed system. I've had 8 laptops over the years, including other MBPs, Dells, IBMs, Toshibas and Acers and this would be the first time that I've ever seen this. The other thing that is bothersome is that the while the system and plugged in and the battery is discharging, the little LED on the mega-safe is green, not orange. If I didn't know what was going on, I would have no clue this was happening. At this point though I've learned that "If I hear the fan, the battery is discharging". I keep wondering what happens when the battery dies, will the system throttle down or crash? Does anyone know if is common to all MBP 15s or is my system defiective?