I'm getting a little bit bored with stock 4.1.2 JB. This iteration of Android is really old, and day after day it's getting older. And there's virtually no chance for the official update. That is the reason I'm considering installation of KitKat-based ROM.
But what I'm concerned about is battery life.
I can get about 3,5 hours of the on-screen time on stock JB. I have EcoMode toggled on and CPU set at 640MHz
I want to know if custom ROMs tend to have worse battery life or rather are capable of increasing it? If I'm going to get worse battery life after installing custom ROM, then I'd rather stay on stock JB.
And what about "brick"? Can you really brick your phone so badly, that there's no chance for it to be fixed?
And the last question - what's the difference between "Optimus 4X HD Android Development" and "Optimus 4X HD Original Android Development" ?