Yosemite battery drain solution found?
As so many of us here, I experienced fast battery drain (and, oddly, charge) under Yosemite. The battery used to last 6+ hours for light work under Mavericks, but only 2-3 hours after I installed Yosemite. There were no cpu-hungry processes, PRAM and SMC reset wouldn't do anything. The battery would still last 2-3 hours only.
Not any more. I'm back on 5-6 hours. What happened?
Two days ago, I opened my Macbook Pro to clean out the fans. Careful as I am, I disconnected the battery cable from the logic board. I unexpectedly had to go away, so the cable was left unplugged for an hour or so. Later, I finished the job and put all back together. To my surprise, my battery appears to be fine after that! I've drained it to zero twice since that – it lasted much longer than it ever has under Yosemite.
Maybe someone else suffering from a bad battery might want to try this...
MacBook Pro (17-inch Early 2011), OS X Yosemite (10.10.1)