Here's one advanced tip to noticably improve battery life on almost any Android device

Here's one advanced tip to noticably improve battery life on almost any Android device
Compared to the feature phones of old, the smartphones of today are profoundly more powerful. You know that. The industry has made incredible leaps forward, and we enjoy devices that are far more capable in all areas... but one. Battery life. A tougher nut to crack than we'd all like.

Of course, there are all kinds of tweaks you can apply to better the endurance of your device, and most of them can be taken care of by even novice users — at least so long as they know where to look. For today's lesson, however, we'll embark on an infinitely more perilous journey that simply isn't for everybody. It's not that it's incredibly hard to apply this tweak and reap noticeable savings in power consumption, but it does require root and a custom recovery, both of which are relatively simple, but still advanced, operations nowadays. For the purposes of this tutorial, we're assuming that you've got these two out of the way.

The guide here is nearly universal, and will work with most popular Android devices. In case you're curious, we'll be showing you how you can easily under-clock and under-volt your CPU (and GPU) on demand, and set a different CPU governor that ensures the most is squeezed out of your battery pack. Keep in mind that newer devices likely already include one such tweak as part of the software they come with, but most don't go as far as we're tentatively suggesting you could.

As with any modifications, there's always some risk involved when messing with your device, so we suggest that you perform a Nandroid backup of your system in case things go south. Better safe than sorry!

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53 Comments

55. Sidewinder

Posts: 515; Member since: Jan 15, 2015

On s4 international variant I use voltaqe kernel. The amazing thing about the Exynos 5410 is that title can be undervolted by upto - 100mV without any stability issues. It also helps the phone stay cooler than on stock kernel. Doesn't play nice with hotplugging though.. But ondemand governor already gives maximum savings.

47. shahrooz

Posts: 792; Member since: Sep 17, 2013

9 here, lol

44. LetThereBeLight

Posts: 117; Member since: Nov 20, 2014

At last something useful real tech stuff and not "how to change wallpaper on iphone".

37. Modest_Moze

Posts: 184; Member since: Mar 23, 2015

Unlock the phone, easy, flash the kernel, okay, no problem. We need a guide that doesn't involve unlocking the phone.

35. epdm2be

Posts: 836; Member since: Apr 20, 2012

Has any of you smart-asses the telno. of 7 of 9? :-)

33. roscuthiii

Posts: 2383; Member since: Jul 18, 2010

8 of 2? Anyone take 8 of 2 yet?

32. legiloca

Posts: 1676; Member since: Nov 11, 2014

Instructions unclear.. got my butt stuck in the toilet

28. Hexa-core

Posts: 2131; Member since: Aug 11, 2015

Yeah, bloatware drains batteries badly!

25. skymitch89

Posts: 1453; Member since: Nov 05, 2010

How about disabling/uninstalling apps that are not being used? How about turning down the display brightness from 100%? I've done, and do, both of these and my battery life is dramatically increased. Not to mention that my device speeds up a little and has a little more storage freed.

20. duartix

Posts: 311; Member since: Apr 01, 2014

I don't really know what to laugh at the most: the incoming PA lawsuits for bricked phones or trying to undervolt all but the slowest slot...

40. combatmedic870

Posts: 987; Member since: Sep 02, 2015

Actually undercoating the slowest spot increases standby time. I usually undervolt everything -75 but the top spot. Every little bit of battery you can save the better

19. nodes

Posts: 1165; Member since: Mar 06, 2014

yes, buy the most powerful Android smartphone, and then underclock it. seems like a really good idea.

42. tedkord

Posts: 17529; Member since: Jun 17, 2009

Undervolting isn't underclocking.

17. BundlePack

Posts: 23; Member since: Mar 06, 2015

Here is an even better way to extend your batery life: Turn off the WiFi connection on your phone when you aren't using it. When I do that my battery life is extended by 20-25%

10. zeeBomb

Posts: 2318; Member since: Aug 14, 2014

It's questionable if undervolting has a huge effect on battery. I have done this all the time, and instead of getting most of your chipset you can also hinder stability. Just something to keep in mind for those unfamiliar with it.

13. drifter77

Posts: 402; Member since: Jun 12, 2015

Yeah I undervolted my rooted Z3C to minimize its heating issues, but unless you spend a good chunk of time testing the min. and max. clock speeds of your CPU cores, the phone's performance will suffer.

16. tedkord

Posts: 17529; Member since: Jun 17, 2009

It's not just the voltages, you need to use a good governor. Good kernels include good choices for governor which can save power and maintain or increase performance.

23. funtikar

Posts: 25; Member since: May 05, 2012

I've given up on custom kernels and customizing it... Because just like what zeeBomb. I really don't think governors do that much... its does increase standby time but active usage time is still the same... Flashing to bare custom ROM does help though but kernel thingy are just not worth it especially if you're a power user or at the end of the day you're just the type of guy who just wants good batery life , the alarm works in the morning along with social messaging app and your browser.... Its better off to hunt for a phone with a good chipset that doesnt drain the battery as much in the first place

6. TheYellowFlash

Posts: 45; Member since: Oct 08, 2015

Get a powerbank and that's it!!

4. Proxy.from.Deep

Posts: 26; Member since: Jan 09, 2015

Well , i kinda dont trust to these custom stuff - system might become unstable /waranty iisues/etc .... anyway - i have "my own" method to save battery - use apps n sht only when needed , all other time - so called "ultra power saving" . and guess what - battery lasts full 7 days = one week :)

7. Proxy.from.Deep

Posts: 26; Member since: Jan 09, 2015

and to be clear - a pretty well know the kitchen of "custom world" - been there done that . :)

2. A.Adel

Posts: 45; Member since: Sep 01, 2014

Simple Q why the Allow & Deny box looks like IOS in pic number 4 ???

1. Finalflash

Posts: 4063; Member since: Jul 23, 2013

Yea.... There probably aren't more than 2 ppl on this site that can actually even attempt do any of that.

3. Ordinary

Posts: 2454; Member since: Apr 23, 2015

I am 1 of 2.

34. Unordinary unregistered

8 of 2

39. bambamboogy02

Posts: 842; Member since: Jun 23, 2012

∞ of ∞

5. JakeH

Posts: 89; Member since: May 01, 2014

2 of 2

8. Proxy.from.Deep

Posts: 26; Member since: Jan 09, 2015

3 of 2 but still not custom software user :p

9. natypes

Posts: 1110; Member since: Feb 02, 2015

4 of 2. This isn't 9to5 Mac

12. Proxy.from.Deep

Posts: 26; Member since: Jan 09, 2015

psst . i`m on Android ;)

* Some comments have been hidden, because they don't meet the discussions rules.

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