I've gone from getting over 6 hours on my 15" base 2010 MBP to about 4 at the most on a full charge. This is with the screen at middle brightness, little to no CPU or HD usage and integrated graphics.
I've gone from getting over 6 hours on my 15" base 2010 MBP to about 4 at the most on a full charge. This is with the screen at middle brightness, little to no CPU or HD usage and integrated graphics.