Hello, I have an early 2011 MBP that I upgraded to Yosemite about a week ago. Battery life was superb under Mavericks, but now simply browsing on Safari the battery drops to about 70% capacity in an hour. The battery itself is not the problem; I recently had it replaced and it only has approximately 90 cycles based on coconut battery. After upgrading to Yosemite it has instantly been a night and day difference in terms of battery life from Mavericks, to the point where I always have to keep my charger around . I used to be able to get a few hours more out of my MBP. This is also using just the integrated graphics card, forced by gfxcardstatus. I haven't seen any major offenders under the energy tab in activity monitor. Has anyone else seen such drastic impact on their battery life with a similar model? Thanks.