Quote:
Originally Posted by Diverce
If you root your phone you can get great battery life. My friend has a galaxy nexus and rooted it and he was getting full days, and he used it a lot as it was a work phone as well. Think one day he told me that his phone was on for 15 hours and it was only at 50% give or take a few percent points.
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Just to clarify, rooting alone will do nothing for you, but root access allows you to install an app like SetCPU, and you can then throttle the CPU based on many parameters including battery remaining, screen being on/off etc. Rooting also allows custom firmware and kernels that control CPU voltages and do a bunch of other stuff I don't even fully understand - that's where huge gains can be found.
That said, if someone asks me how to get better battery life on their Android phone, my fist response isn't going to be root. There a ton of apps that don't require root and can give you a huge boost in battery life (depending on the phone) just by controlling the radios, how often your phone syncs data while the screen is off, etc.