I have brand new Macbook Pro (15", i5 2.4GHz, 4Gb RAM) purchased at the end of May 2010 and Apple advertises up to 7 hours of wireless web battery life, however I consistently getting only about 4 hours when I use it normally, i.e. WiFi is turned on and quite a few apps are running, but nothing too resource hungry like games or Photoshop. I tried to figure out if my settings are incorrect or if I'm using some apps that really drain the battery, but can't find any obvious issues, so I wonder what other MBP owners typically get from their batteries? Is 4 hours a typical or I need to replace my battery or do something with my setup? OrWhen Apple just givesstates up to 8-9 hours when, must you turn off all wireless, dim your screen to the minimum and perhaps the only app running is thebe Terminal?