I have a MacBook Air rev B and I'm beginning to notice that my battery is draining quite a bit while in sleep mode. My PowerBook G4 NEVER dropped more than a couple of percent even if I left it unplugged in sleep for a couple of days. This leaves me with two questions: 1. Any idea what's causing this? 2. Is there a way to stop it from happening? I travel a lot for work (hence the MacBook Air); I need to get this resolved before my next trip. Thanks!