16 hours in a day of moderate use I don't really consider "good". In any event my point is that's my normal battery life before I even flashed this kernel so it hasn't seemed to make a difference so far. I'll give it a few days and see how it goes.
Sent from my Nexus 7 using xda app-developers app
Honestly, a day is 16hour awake, 8hours sleep (standard day). Which means you have a full day charge which is more than you can really ask for. But what are you looking for really?
Gains depend heavily on type of use, individual devices, apps, ROMs. It is known that kernel tweaks can really be YMMV. Also the "measurements" are really subjective. It depends on network load, precise use, how much movement, day of the week (seriously), was more apps open in the background or not, if autobrightness was on was the usage under the same light.
Today I stayed at home and just browsed mostly, I got 5h20 screen on. Tomorrow I will be in my car a bit, go in a building that connection can be spotty and also DLNA 2-3 TV shows off my phone while browsing. I don't expect to get 5h.
What you might think was no gain today could be some gains that you just didn't notice because your usage was slightly different (yes it was, it always is). But you can't really know, maybe you would have had 7h to 50% today.