Just got a 17" i5 mbp today. Anyhow, I was going through the battery calibration procedure and I'm currently at the "wait 5 hours minimum" part. My question is how can you tell if the battery has been completely utterly drained? If you hit the battery indicator button I get the 1 light that flashes. If the battery is completely drained will that not even come on or does the 1 flashing light count as the battery being "completely drained"? Yes, I know noob question BUT it's not in the guide! haha.