So I have a 2011 17" MBP with Lion 10.7.2 I've noticed that my battery life has been AWFUL (averaging around three hours). I've calibrated it, PRAM reset, SMC reset, but none seemed to help. I just downloaded gfxcardstatus 2 and set the graphics to "Integrated" and now my battery life has jumped up to well over six hours. My question is, will integrated graphics be good enough for heavy photoshop use (file sizes of about 1GB)? Or would switching to discrete graphics help at all with this? I don't ever play games on my MBP, just typical CS5 work. Will Integrated by sufficient enough for this? (note: I've also upgraded to 8GB of ram).