It's inevitable that with new operating systems come new bugs. One widely-reported bug has affected a noticeable chunk of laptop Mac users who've upgraded to OS X Mountain Lion: some users are reporting steep declines in battery life. A poll at Engadget shows that over 7400 of nearly 17,500 respondents who've installed Mountain Lion (42 percent) say they've noticed a definite and discernible drop in battery life. A similar poll at RazorianFly suggests that the 2011 models are disproportionately affected, but that may be sample bias.
Battery problem reports came out last year
