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Root best battery life?

Pretty late response here but..

Just my personal experience of course, but I've gotten the very best battery life out of PSX ([ROM] [AOSP] [4.3] [JWR66Y+JSS15R] [PSX] [v7] [9/24/2013] Pure Speed X - xda-developers). It's pretty low on features but really optimized and tweaked for performance and battery.

Throw a good kernel under it (I use Trinity with the clock max at 1026) and it'll help for sure. Faux is extremely battery friendly, just a bit sluggish for my taste. Other than that, try LBE Security to keep programs from opening in the background and it'll help keep things pretty optimized. I get really solid battery life with those combined.

Good luck!
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