I just installed Lion today on my Early 2011 Macbook Pro 2.2ghz 15". When I unplug my machine and let it sit idle for about 5 mins half brightness and I check the battery life I am getting around 4 hours. The laptop is one month old with 19 charge cycles. Could there be something wrong? Or is this something I can fix in the settings? I have did the search and couldn't find anything about this model. Thanks!