Some Mac OS X 10.8 Mountain Lion users have been reporting that the operating system upgrade has lead to a noticeable drop in battery life on their MacBooks, and it now appears that Apple has been calling those affected to investigate the problem, reports “Macworld UK” (

An Engadget poll ( shows that more than 8,000 (43%) of the 18,939 respondents that had downloaded OS X 10.8 Mountain Lion noticed a difference in battery life right away. A second poll from Razorianfly ( showed that 77% of respondents are experiencing shorter battery life with Mountain Lion. The poll also revealed that the problem is most common on 2011 MacBook Pro models.

A thread ( on Apple’s Support Communities now has over 450 replies and 27,000 views. This indicates that the problem is widespread notes “Macworld UK.”