Ok. I have had my Macbook for almost 3 years now and I'm on my third battery. The other ones died and Apple was able to replace them for me because of my applecare. Besides that, I have a couple questions: 1. I know some people on these forums say that it is ok to keep your computer plugged in all the time but just calibrate it every month. And it is not recommended to charge and fully discharge every cycle. However, my friend has his Macbook for about 2 years and he fully discharges it everytime and he never leaves it in the charger after it is fully charged. His battery is still at 100%. Mine is at 90% now. So is it recommended to full discharge? 2. Since i am at 90% now, is there anyway that i can increase that percent up again? Please don't be sarcastic with me and tell me to search the forums, because I have. Please don't try to google it for me. I thought this place was actually useful until I saw serious people looking for help and smug people googling it for him. Personally, I think that is pretty lame. Thanks in advance for the people that actually DO help.