Macbook Pro Retina Battery Life
Hi, I have a new 15" Macbook Pro Retina running OSX 10.8.2 and am getting very poor battery life (circa 2.5 hours) and its also running quite hot. Out of the box restored from a old, dead, iMac via TIme Machine so assumed to be a few hangovers from that.
I've tried a number of suggestions found on this site but nothing seemed to work.
Following one suggestion I logged in as a guest which seemed to be getting much longer battery life estimates so I ran a manual comparison of processes running against my account and guest to see if there was anything obvious - nothing found. I went back to my account and estimated battery life dropped right back down - at this point I realised that the desktop on my account was set to change the picture from my iPhoto library every 5 seconds - I extended this change to every minute and estimated battery life increased and continued to increase with every incremental change in this setting to the point that no changes in picture were made. However, the best I could achieve using one of my own images from iPhoto was circa 5 hours.
What I have now found is that if I adopt the default Apple Galaxy image rather than one or more of my own then the battery life is up where I expect it(currently have 65% battery with estimated 6.09 hours remaining). The machine is also running much cooler now.
Could something as simple as the desktop picture and using a static image from Apple rather than one or more of my own photos really have this much impact or am I missing something? If so why?
Thanks,
Dave.
MacBook Pro (Retina, Mid 2012), OS X Mountain Lion (10.8.2)