Wow, the booklet or the internet doesn't even tell me to charge my macbook to 100% before it's first use! That's pretty dumb, you have to go on mac 101 or whatever and then they'll tell ya. PCs or any other electronics usually have first time instructions that tell you to charge And then, they don't even tell you that you have to CALIBRATE the first time you use the macbook! I charged my macbook to 100% and started using it. Then I saw the calibration instructions where it tells you that you should calibrate on your first use of the macbook! It says that you should keep the adapter plugged in for 2 hours AFTER it's charged to 100%. I charged the macbook to 100%, then immediately took out the adapter. Now I just completely drained the battery to 0, then I let it sleep over night for 5+ hours. Now I'm recharging it to 100% before using it. Should I recalibrate because I didn't properly charge it on the first time. I charged it to 100%, then immediately pulled the plug; I was supposed to keep it plugged in an extra 2 hours before pulling the plug..