How do I get the full 7-8 hour battery life from my MacBook? I at the most at squeezed out 4-5 with activity of Using WiFi with Bluetooth turned off and possibly watching a movie on iTunes, and my MacBook is barely a month old. My battery meter also jumps up and down a lot but never reached the 7-8 hour mark. For instance meter showed 5:45 a minute ago and now its down to 4:55. Thanks!