This is for rooted users only.

We all want to squeeze every last little bit of juice out of our devices that we can, and if you happen to have a rooted HTC EVO 4G running an AOSP kernel (such as the one that ships with CyanogenMod), then XDA member -viperboy- just made your life a little bit better. Thanks to him, there is now an easy to way to undervolt your kernel, by way of four flashable .zip files.

Generally speaking, AOSP kernels are volted to support several different devices, so it stands to reason that some devices could handle lower voltages. With that thought in mind, -viperboy- set out to create scripts that could lower both the minimum and maximum voltages of the kernel, without compromising stability. The end result was four incremental scripts ranging from -25mV to -100mV (that's the undervolt amount), which should provide a working solution for everyone.

-Viperboy- noted that while everyone should be able to use the -25mV or -50mV scripts without an issue, the -75mV and -100mV scripts are fairly extreme and may send your device into boot loops. Fortunately, he also created a reset script which sets all voltage values back to stock. If you plan on giving this a shot, make sure you download the reset scrip and put it on your SD card along with the other scripts, just in case you encounter any problems.

As always, it's recommended that you make a backup before attempting any drastic mods and if you have any problems, hit the source thread for more info.

Source: XDA

Cameron Summerson
Cameron is a self-made geek, Android enthusiast, horror movie fanatic, musician, and cyclist. When he's not pounding keys here at AP, you can find him spending time with his wife and kids, plucking away on the 6-string, spinning on the streets, or watching The Texas Chainsaw Massacre on repeat.

  • http://www.ericcamil.com Eric

    As I discuss why the extended 3500mAh batteries are a must for the EVO 4G, I am alerted to this posting. Thanks for reading my mind (and all EVO users needs) Android Police. Cannot wait to order one of those new shirts.

  • Dave

    Why is an extended battery a must? I get about 20 hours of life out of my evo with moderate use. And I like to be able to keep my phone in my pocket.

  • http://www.zeegol.com AndresL

    An extra battery is not necessary, If you use tasker or Juice defencer, configure your phone to swith off 3G,4G and WIFI every time you turn off your screen and turn them on(I don't even use 4G) automatically when you turn the screen on.
    Before doing that my battery would last around 9 hours, now it goes for the entire day easily. With no use I get 7 hours and the battery decreases only 5%