Some bit of software within Mountain Lion indeed appears to noticeably reduce battery life for Apple’s portable Macs. Following on numerous reports lodged in Apple’s support forums, we did some additional testing using our Retina MacBook Pro review unit, which seemed to lose approximately 38 percent of its previous 8-hour runtime after installing Mountain Lion. Apple support technicians are continuing to gather evidence from users reporting problems, though at least one user has been told that an update from the Mac App Store should address the issue. Read the full story at ARS Technica.