I purchased my 15", 2.4GHz SR MBP on June 2007. Since then on, I barely get over 2hrs of battery life. I have calibrated the battery several times. I get far less battery time if I am using bluetooth, wi-fi, and internal speakers. So I just wanted to see if anyone is getting anything close to the advertised 6 hours of battery life. Also, it would be helpful if you could post the conditions under which you clocked the battery time (such as state of wifi, bluetooth, brightness, charge cycles, etc.) Thanks! EDIT: My battery has 56 cycles.