i5(Ivy bridge), 9cell internal, slice battery, ssd, 16gb ram. The internal is one year old, the slice is two or three months. I have it set to always drain the

i5(Ivy bridge), 9cell internal, slice battery, ssd, 16gb ram. The internal is one year old, the slice is two or three months. I have it set to always drain the slice first, which maintains the internal battery well, but shortens the long-term life of the slices. I can get 4ish(?) hours on the slice alone. 13ish hours is my number from a few weeks ago on top of Mt. Diablo. I was running a VM, making decent use of my 4g connection, and doing otherwise reasonably intensive tasks with the screen brightness all the way up. I've never done a video-loop at 75% brightness type test, so I can't give you an apples to apples comparison.