Moving from OS X Lion 10.7.4 to OS X Mountain Lion 10.8, some users quickly noticed that the new version of the operating system significantly reduces the battery life of their Mac. For many, autonomy decreased by approximately 2 hours, and a website decided to do a series of tests to see how long Macs with OS X Lion 10.7.4 and OS X Mountain Lion 10.8/10.8.1 can be used. The table above shows the results and you can see that even the new OS XMountain Lion 10.8.1 does not return the autonomy to the value of OS X Lion, although it significantly improves the previous problems.
Considering that OS X Mountain Lion contains a suite of new functions, including the Notifications Center, there is a possibility that the decrease in autonomy is related to the functions that require more resources. The chances that the autonomy will return to the values from OS X Lion 10.7.4 are minimal, but there is a possibility that the results from now will improve to a certain extent, but more than 10% of the last value, of the table, I don't think it can adds Apple.
