Shortly after the launch OS X Mountain Lion some users started to complain about problems with Wi-Fi connections, but it seems that the battery life could also be affected by the new operating system. On discussion forums of Apple, many users complain about the fact that the battery life of their own Macs decreased after installing the new version of the operating system. The main cause could be an increase in the resources consumed by the operating system, but we are only talking about user assumptions and nothing concrete because Apple has not confirmed/denied the problem.
A future update of the operating system could solve the whole problem, but until then I ask you if you have encountered something similar on your Mac.
