Does undervolting really save battery life?

TiTAN-O-One said:

Hey guys i saw this video on youtube (http://youtu.be/5nrOWZUsEEc) that explains that undervolting wont make your phone save battery life more than 2% even with EXUV. I need explanations for this as i don't really understand.

Via the Internet

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TiTAN-O-One said:

Hey guys i saw this video on youtube (http://youtu.be/5nrOWZUsEEc) that explains that undervolting wont make your phone save battery life more than 2% even with EXUV. I need explanations for this as i don't really understand.

Via the Internet

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r25txe said:

Undervolting doesn't save battery as your CPU will still try and draw the manufacturer set levels.

If it doesn't get those levels it must step down its own level which essentially means that the activity that needs processing needs more time, and consequently, more battery.

Even if you manually adjust the clock speed of your CPU down to match your new voltages, the same applies.

UC/UV is quite simply the worst voodoo that persists across these forums.

/stripped down explanation

(I didn't even watch the video)

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sir mordred said:

we can control the hardware through software so we can control the voltages and frequencies through kernel

devs can put new frequency levels as manufacturers did (like this :https://github.com/Christopher83/sa...mmit/899d5a296a43a6d32c2468bba8121c3a1915dd68)

if its not true and if this method doesnt work, Why all kernel devs on XDA trying the same thing??

https://github.com/faux123/android_kernel_oppo_n1/commit/eaa6639979e1144f28c14e6de48994d41e5d20d8

https://github.com/franciscofranco/hammerhead/commit/104890313a73dae0e7d7a13975801cc568d231ad

in summary EXUV and UV are absolutly battery-friendly

and do not forget undervoltage cant damage the hardware but overvoltage(ı mean OC) can damage the hardware

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r25txe said:

I've based my reply above on this post.

It is a much longer version of what I summarised earlier.

And, sorry, even UC/UV can damage your hardware in rare situations.

It does baffle me why people spend so much time tweaking things as you mention when the net returns are negligible, and often cancelled out.

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