When the new OS came out I was looking forward to extended battery life. I just haven't seen much of an improvement leading me to believe I may have too much junk loaded on my system. Is there any software (I know more of what may be the problem) that can analyze system performance and make recommendations to remove/reconfigure some things? I know one possible answer is to install a fresh OS and only install what I absolutely need, as I need it, but I am wondering if there is something else I can do. My system is: 2011 MBP Matte, high resolution screen 2Ghz quad-core i7 500GB SSD (samsung 840) 16GB Ram Oh, I normally get under 4 hours with a fully charged battery. That is using Safari, Aperture, Mail, Messages, Word, Excel and Calendar mostly. I don't watch movies on my laptop and I don't do much video editing. My brightness setting is about halfway.