So I've had my MacBook for four months. Love it. I particularly have loved the battery life. Nearly four hours if I turn off bluetooth/wireless/turn monitor down (i.e. "Airplane Mode"). In other modes it's gotten about three hours. Now, since I've had this machine, I've used Coconut Battery to monitor it's capacity. After first calibrating the battery it was between 95 and 97 percent. Now, four months later, the battery life has decreased some, and Coconut Battery consistently reports a battery capacity of 86%. Is this a failed battery? Or is this normal? How much drop in capacity is too much? Anyone have a story of getting their battery replaced at the Apple Store?