Hey all! I have my MBA mirrored to my television in my dorm room for use as a desktop when not out and about. I've noticed that it drains battery quite faster than it normally would. I also use a bluetooth mouse and keyboard. I am sure that all of that would drain the battery quicker than normal and is normal. Although, in sleep mode I still feel that the battery depletes quicker than it should. I leave the HDMi-Thunderbolt cord plugged in when I shut the lid. Could that be it? Any ideas?