Currently Being ModeratedJan 22, 2013 4:57 AM (in response to cbhiii)
I can confirm that after the EFI 2.6 upgrade my Mac wastes battery much faster than before. Before the update I had like 6-7 hours (some times even 8) of battery while browsing and subtle coding. Both the display brightness and the backlit keyboard have always been set to auto. After the upgrade, with the same settings and running applications, I get 5, maximum 6 hours of battery life ( 6 hours if the display brightness is set to low).
Hope this problem to be fixed soon.
My Macbook Air is 13 inch, 8 GB of RAM, i5 processor.