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[Q] Would reverting to stock and re-rooting help my terrible battery life?

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Question [Q] Would reverting to stock and re-rooting help my terrible battery life?

Short version: I'm getting horrible battery life on a brand new battery with a setup that other people get much more life out of. Is it possible that there's some part of my phone that survives all the clean flashes I do and is responsible for this? Would completely taking my phone back to stock and then re-rooting and flashing a ROM wipe that part out or does regular clean flashing clear out anything that could be responsible?

Detailed version: I've had my device rooted since Day 1 and have flashed countless ROMs over the two years. Recently I noticed I was getting horrible battery life on Carbon, especially when it came to screen on time. I bought a brand new battery and it got a little better but still pretty terrible. Since then I've tried a couple different ROMs and kernels (AOSPA, Task650, kt747) and while it's been better, it usually can't make it past 6pm. At best I'm getting 1-1.5hrs screen on time. Also, the first 15% and last 25% drains so much faster than the rest. Would going completely to stock, re-rooting, and flashing a rom help?
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Nothing should remain if you wipe system, data, cache, and Dalvik.

Try installing a ROM with a CPU governor that allows your to choose the settings.
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Also try undervolting in the kernel and see if that helps

Sent from my ATT Samsung Galaxy SIII using TapaTalk
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Current Device: Samsung Galaxy SIII (SGH-I747)

ROM: Stock Touchwiz Rom

Kernel: Stock 3.0.31-2024954

Previous Devices: Motorola Droid 1, Pantech Crossover, Motorola Droid X, LG Revolution, Sony Ericsson Xperia Play (r800x)
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