yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Nexus] SrTapir:
I've update the guide with the following:

Something apparent like having great number of widgets in multiple homescreens.

Widgets, 5 homescreens full of widgets updating in real time could be detrimental to the battery live, take care when adding widgets and as said in the previous paragraph, change every widget preferences to update in longer times than usually they have by default. (Great Savings if many apps with many connections).

A new section with the last updates in kernels battery life related.

Experimental

This are new tweaks that normally appear in new/advanced kernels, his use according to battery save is still not really tested or can have a detrimental on the physical conditions of the device/battery. Use them with caution or if you really know what you are doing.

[MOD][KERNEL]Battery Life eXtender (BLX), this is a tweak created by the popular Ezekeel and in his owns words: "Older types of rechargable batteries exhibited a 'memory effect' which made it neccessary to completely charge/discharge the battery when using to prevent degradation of the capacity. Modern Lithium-Ion batteries like in the Nexus S do not show this problem and thus it is not necessary to use the battery in complete (dis)charge cycles. In fact on the contrary, it is commonly accepted that both very low and very high charge states accelerate the degradation of the battery capacity (that is why you should store Li-Ion batteries at around 40% charge).

While a low charge state can be simply avoided by charging the device more often, the battery in the Nexus S by default is charged to around 95% capacity and I could not find any app or tweak to stop the charging at a lower capacity. Thus the only way was to use the manual override and pull the cable which is annoying since one had to monitor the charge state." (Unknown Savings).

Galaxy Nexus is charged by default to the 96% of this capacity, with this new tweak you can gain this 4% (don't know for sure if you can get the 101%) of battery life, in 4 hours screen time, more or less 10 minutes, but it can be detrimental on the long way to the battery physical life.

You can found this tweak in the last nightly of Franco's Kernel, and can be activated via his own app.

You can find more information in Ezekeel post here at XDA.

[MOD][KERNEL]Undervolt of IVA and CORE Voltage, new patches let undervolt the IVA (hardware media decoder) and CORE (GPU Voltage), I'vce been playing with this all the day and I've managed to undervolt a 15-20% de original frequencies. (Unknown Savings).

I understand that with this we are limiting the maximum voltage they can use, letting them to use lower ones according to GPU load. I'm not sure at this (GPU uses smartflex also ¿?) but with a descent of 20% on the voltage could result in longer battery life while playing games or seeing movies.

I'll try further undervolts, but this are my actuals on a stable system.

You can play with this voltages via the last nightly of Franco's Kernel, and via his own app.

Take care playing with this, could result in system instabilities, reboots, freezes, etc.
[Samsung Galaxy Nexus] billouetaudrey:
Very Great Guide !

Thx!
[Samsung Galaxy Nexus] myrdog:
I've been using a few of these tweaks and found that my battery kinda... sucked. I disabled the light filter sensor, and it seems things are running better once again.
[Samsung Galaxy Nexus] heo_con184:
Could someone tell me how to set up in Custom Blacklight ? I have no idea what light sensor filter and light level mean.

Any suggestion will be greatly appreciated.

Thanks.
[Samsung Galaxy Nexus] SrTapir:
The "sensor" is the physical one, modifying it you modify its behavior (times it activates, takes information from the environment, etc..)

The "levels" are the one's you modify according concrete situations, for example, if the sensor identifies dark (low value of it) I want the screen level to be low (low value of screen), high sensor values to high values of screen, etc..

With this new tweak you are allowed to modify them, adjusting them to your own requirements
[Samsung Galaxy Nexus] TyroneLT:
I've been using the settings in the link below for the light sensor levels for the past 2-3 weeks and have had decent results. I average between 4 and 4.5 hours of screen time with wifi on most of the day and sync always on, along with some 3G on the way to and from work daily.

http://androidforums.com/samsung-galaxy-nexus/526525-gnex-screen-power-consumption-study.html

This is all on a GSM GNex using AOKP B32/Franco #135. The levels might not be as bright as some people would but should still be readable.
[Samsung Galaxy Nexus] Timmyfoxeh:
I've heard AOKP isn't too great on battery life.

Anyone have any experience how it compares with other ROM's like liquid, CM9, stock etc?
[Samsung Galaxy Nexus] barondebxl:
Here is my advice to everyone who wants great battery life with their nexus: FLASH JAMES BOND KERNEL!!!!!!!
[Samsung Galaxy Nexus] ubernode54:
Thanks for a great info post. Learned a couple new things!
[Samsung Galaxy Nexus] hotrock11:
....and then what?
[Samsung Galaxy Nexus] Mikey503:
I've been using these values and they've been working great. Just bright enough to see but dim enough to help save some juice. Thanks for posting
[Samsung Galaxy Nexus] SrTapir:
Updated the first post with new CPU Undrevolt values:

Light sensor values:

And IVA and CORE values:

Thanks everyone for the comments :)
[Samsung Galaxy Nexus] a1exus:
I'm using Verizon GNex. Unrooted, I'm getting terrible life time of standard battery (about 2h of display and use of the phone about 5h, about half a day)

I'm waiting for Verizon to release update for this phone, if that won't solve it I think I'm going to root my phone and try some of those kernels.

It's there a way to do some improvements without root though?
[Samsung Galaxy Nexus] SrTapir:
You may try some of the screen/CDMA related tweaks, cause screen and LTE (in your case) are the most draining parts of the phone.

I usually play with SwitchPro Widget and the brightness, 2G/3G, GPS quick controls that I have placed at my main screen, helped me a lot to quickly enable/disable features.

Remember to have WIFI Always ON while sleep.

AUTO bright is too bright by default, play with the brightness knob of SwitchPro Widget selecting for example 0%-20%-40%-AUTO options every time you push the brightness knob.

Hope it helps a bit.
[Samsung Galaxy Nexus] myrdog:
Gonna have to give the new values a try. My battery yesterday just ate it with my current settings. Lasted 10 hours, 3 screen on. Nothing vigorous.
[Samsung Galaxy Nexus] a1exus:
I actually use Ultimate Juice Defender and that helps me a lot, but essentially what it does it turns off my data connection and turns it on periodically through the day on the good days, I can get about 12-16h (once again I'm on standard battery) but never the less about 2h of display time...
[Samsung Galaxy Nexus] diSke:
I've got a question. I figured out that different LED lights need different voltages.

Is it possible to save some battery by chosing the notification LED color that uses the least amount of voltage?

Don't know if it's worth while because I imagine the savings aren't that high... But it's worth a try?
[Samsung Galaxy Nexus] ssglackey:
AOKP b31 with 1750 mAh battery

Franco kernel 135 interactive governor with generic hotplug; no UV

custom light sensor settings

ROM Power saver on, 2g with 1h sync interval
[Samsung Galaxy Nexus] SrTapir:
I really have to give a go to this program.. :rolleyes:

I'm totally blind speaking here, but I think the voltage is the same, independent of the colors, have to search more on this.. on the other hand I think that maybe according to battery, it should be better to reduce the "light on" frequency that change the colors, to save more voltage..
[Samsung Galaxy Nexus] zapskull:
In fact the LED colour does change its voltage. In fact, a multicoloured LED is made of three mono-coloured LEDs (RGB) with a common anode. Its coulour is obtained by varying the voltages of each monocoloured leds.

Thus, i guess that if you choose only one color, the two other leds would be unlit. And if you choose a dim single color, it should be even beter. I think that led powering is peanut compared to cpu and screen consuption..

My sources are from : http://www.instructables.com/answers/How-do-multi-colored-led-lights-work/

I have a french g nexus s ( the one with a lcd). I read your pdf and I saw that energy consumption is constant whatever the pixel's color..

Does that mean that 'black themes, apps and stuffs' are useless on lcd screen??? So the only screen battery friendly setting is its brightness? Am i right?

Envoyé depuis mon Nexus S avec Tapatalk
[Samsung Galaxy Nexus] SrTapir:
Thanks for the info. :)
[Samsung Galaxy Nexus] king23adrianc:
black on lcd is not gonna save much battery... only will save battery on amoled
[Samsung Galaxy Nexus] SrTapir:
Added in the main post:

European Radio Recommended: XXKK6 (XXLA2 is giving too high "Phone Idle", resulting in drain problems)

After using the last XXLAx Radio's I've noticed a quite better receptions (3G coverage everywhere with very nice radio signal) but an incredible drain due to a too high "Phone Idle" value.

In Europe XXKK6 is by far more battery friendly.
[Samsung Galaxy Nexus] nazrin313:
Damn those light settings are pretty low..i did try the settings but was a tad too low for my liking..thanks anyways...
[Samsung Galaxy Nexus] Timmyfoxeh:
I'll give it another try. Though I've so far had great results using UGLC1 in Sweden, did an idle test the other night where I had charged it to 100% and then left it unplugged over the night when I was sleeping. In the morning (after about 7 hours) my battery was at 97%.

That's a 3% battery drain for 7 hours of constant idle which I think seems quite good. Data and sync was on, no wifi however and no other background services running.
[Samsung Galaxy Nexus] billouetaudrey:
I install XXKK6 because this morning, when I wake Up my phone, I see it use 48% on idle...

See tomorrow now ...

Thanks :)
[Samsung Galaxy Nexus] thenickisme:
http://db.tt/j7fIb7f2

:D
[Samsung Galaxy Nexus] SrTapir:
1 million thanks! :D:D
[Samsung Galaxy Nexus] RogerPodacter:
You are totally correct. On your lcd screen the color is irrelevant. Its the same power drain showing white or black. Its makes no difference. Only the backlight brightness level matters.

If you have an amoled screen, then white colors use more power than dark colors.
[Samsung Galaxy Nexus] zapskull:
Thanx, I'll try do dig up what's different between a lcd pixel and a led one..

Maybe i should explain that to european nexus s owners...

Envoyé depuis mon Nexus S avec Tapatalk
[Samsung Galaxy Nexus] SrTapir:
Updated the main post in the Connections and WIFI sections!

In the GSM version on the other part the 3G, HSPDA consumes great great great battery juice. If you are not in WIFI and are not using the data connection, a great way to save battery life is changing from HSPDA or 3G to 2G networks (this is really noticeable if you travel a lot by car or train, cause you are continuing connecting a reconnecting from different radio antennas).

There's some ROMs as Liquidsmooth that allows when you are not on WIFI and after an specified delay, to change to 2G automatically (or low consuming) networks when you have the screen off. This is a great way to save battery when you are not at home, reducing the standby drain of the phone outdoors.

.

The automatic 2G when sleep is a main function of Juice defender. Thanks to a1exus for recommendation.

In the CDMA version the LTE consumes also great great great battery juice. If you are not in WIFI and are not using the data connection, a great way to save battery life is changing from LTE to 4G networks (this is really noticeable if you travel a lot by car or train, cause you are continuing connecting a reconnecting from different radio antennas).

Thanks to thenickisme for this!

WIFI

Wifi has a crazy history on the GNex. After talking and talking, posting and posting, it has been tested that WIFI always on while sleep is the best way to achieve a longer battery life. (Medium savings).
[Samsung Galaxy Nexus] TyroneLT:
Does changing the scrolling cache on a custom ROM like AOKP have any effect on battery life?
[Samsung Galaxy Nexus] TyroneLT:
Can playing around with auto brightness and light sensor levels actually have an adverse effect on the battery or performance due to the sensor always being active?
[Samsung Galaxy Nexus] stratoox:
my gnex dosnt get deep sleep, someone know fix it?
[Samsung Galaxy Nexus] TyroneLT:
Download Better Battery Stats and check the wakelocks and processes for apps that are not being put to sleep. Chances are you'll need to clear their data, uninstall and reinstall them. If the problem still persists, just delete the apps completely or deny them background internet access.
[Samsung Galaxy Nexus] kba712:
Low brightness

Don't you guys get banding effects on such low brightness levels?
[Samsung Galaxy Nexus] lukin321:
This is very helpful. Thanks!
[Samsung Galaxy Nexus] krisnasp:
thanks for the tips... i really felt pain with battery life issue on my galaxy nexus, coz in my country the network is unstable... i really want to try this guide ASAP. :)
[Samsung Galaxy Nexus] kelkelkel:
Which kernel out there do you recommend as the most battery saving kernel? There are so many out there. Thanks for the guide.
[Samsung Galaxy Nexus] diSke:
From my personal experience I'd say trinity kernels :)

Sent from my Galaxy Nexus
[Samsung Galaxy Nexus] pmcee:
Tried em all. Sticked with James Bond kernel.

Stable and for me with heavy usage nearly double the battery than with other kernels.

-sent from my galaxy nexus
[Samsung Galaxy Nexus] keni.mardira:
a bit of a noob question, about battery life extender (by ezekeel), so if my battery is limited to 96%, then is it ok for me to keep the phone connected to the charger for a whole night?
[Samsung Galaxy Nexus] xFrozen:
Yes, generally most phones can be left on overnight. When the battery is full (or basically when it reaches 96%), the charger will stop charging it, and will power the phone instead. However, this doesn't mean you can leave it on for days. I've read somewhere that leaving it plugged in for more than 24 hours is unhealthy somehow (which is easy to avoid, since most people don't do that).
[Samsung Galaxy Nexus] jvw:
This is really a great post, very informative!
[Samsung Galaxy Nexus] evgeny9:
A draining problem

Thanks a lot for the tips!

Sorry for interfering, but I still have a problem of "Google Services" and "Browser" processes eating my battery keeping the phone awake. I opened a new thread with screenshots of the problem attached but it seems like no one's ever been there.

Any help will be very appreciated!
[Samsung Galaxy Nexus] Mach3.2:
This is horrible screen on time..

Pressed from my Maguro
[Samsung Galaxy Nexus] fernandosds1:
Personally, I'm using the stock rom JB 4.1.1 + Franco Kernel with UV 100mV at each frequency (Smaller than the GNex it restarts). use a minimum brightness and 2g only during the day.

My battery lasts around 16 hours, 3 hours with screen on.

Have any tips to improve performance?
[Samsung Galaxy Nexus] shonelli:
Only stock, nothing more. Turned off ANY location reporting - very big improvement
[Samsung Galaxy Nexus] vkamicht:
To share my experience, and I can't really comment about screen ON time because I haven't had enough time to evaluate it; I'm not a heavy user

LeanKernel, BuglessBeast JB

I have all location services turned off as well and if I turn off mobile data before bed my phone drains about 1% in 8 hours. I love seeing that flat line in the battery graph.

I have an obsession with checking my wake locks and I'm probably way more paranoid than I need to be. I'm currently upset over NFC kernel service waking my phone even though I have everything NFC related disabled. Aside from that I don't really notice any rogue processes -- except Facebook, with every single notification or background service turned off, STILL wakelocks. BBS is good for showing you things you didn't realize like when an MMS fails to send and you turn your screen off, it'll stay awake for 15-20 minutes attempting to send and draining your battery, even though it's not actually succeeding to make a connection or doing anything. Sounds like bad coding to me (MMS has the functionality to display "failed to send" but my MMS never shows this - it just keeps trying)

Location services seem to update your location periodically even if you aren't using Google Now or any active apps. It will just wake your phone up to update location for no reason. I have no need for Google Now so I have that and all locations disabled... my phone rarely wakes up with screen off.
[Samsung Galaxy Nexus] rza_bgy:
Battery Problem

I have bought a Gnex few days age, updated its official Rom(4.0.4 to 4.1), everything is stock,

I charge the battery full but after few hours usage, screen blinks and phone goes off, battery is drained! when I put it on charge,it starts charging from zero percent but at some point suddenly becomes like 40 or 50%...I let it fully charged, 100%, but after few hours of normal use it drains just by screen blinking...

I think battery never charges fully..any solutions?
[Samsung Galaxy Nexus] chrone:
thanks dude. well done in tweaking each automated update settings! almost each apps downloaded now has its own auto syncing or running in the background all the time. this guide saves some juice on me. :)
[Samsung Galaxy Nexus] kongkard:
Nice post:good:
[Samsung Galaxy Nexus] chrone:
forgot to ask, is turning the animation off from developer option helps improving battery life (small, medium, great)??
[Samsung Galaxy Nexus] chugger93:
What an amazing article... thanks OP! Really appreciate the detail in this thread.
[Samsung Galaxy Nexus] kyokeun1234:
It's simple guide, yet support effective! I didn't want to underclock my phone, cuz I was worried that it might allow down my phone badly, but I can't even notice! Also uv really made my phone cooler, which is good, cuz galaxy nexus is known for getting heated up quickly :)
[Samsung Galaxy Nexus] Ameer925:
thanks a bunch
[Samsung Galaxy Nexus] ibrahimakz:
Thanks :good: What do you think about calibrating battery after every "reset factory settings", upgrading a newer version of Android, trying a new ROM and things like that? Shell I do it after every format? And do I need to format my Nexus if I think it is misscalibrated (not using 100% of battery) ? :confused:
[Samsung Galaxy Nexus] kyokeun1234:
Can't you rest battery stat on clockworkmod?
[Samsung Galaxy Nexus] JediNinjafication:
I reset after most of my flashes. They say should flash on full charge but I do it whenever and use battery calibrator from the play store after i set everything up. I guess it's supposed to delete all the stats from previous Rom so it can get an accurate reading. Personally I think it helped
[Samsung Galaxy Nexus] TyroneLT:
Use black are darker backgrounds. AMOLED screens do not need to use power on black pixels. I should save some juice on the screen.
[Samsung Galaxy Nexus] jackfrost3821:
Thank you for this amazing guide. :good:

What Governor and I/O scheduler do you use?
[Samsung Galaxy Nexus] Controvrsy046:
Awesome tweaks! can't wait to try them
[Samsung Galaxy Nexus] sramedani:
In response to the dark themes , this is ESSENTIAL also it looks badass, I currently am using the eclipse tom 4.1.1 and am overclocked to 1350mhz, screen brightness 10% and I am getting really good battery life
[Samsung Galaxy Nexus] Some1withBalls:
black pixels do consume battery but 3x less than white ones...
[Samsung Galaxy Nexus] najaboy:
It doesn't help. It never has and never will because it's snake oil. No app can calibrate your battery. Battery stats has nothing to do with charge reporting. It is merely a list of apps that have used battery since last reboot and, as such, is cleared on reboot by the is.

The whole notion of clearing battery stats/ battery calibration has been thoroughly debunked.
[Samsung Galaxy Nexus] elnovio:
sorry for my maybe noob question, but as I have seen till now, not many Roms have automatic backlight adjustments settings? (Besides liquidsmooth) I tried Androidme, aokp, stock (always some roms of the newest 5-8 threads in development section), is there a way to install it in addition to any jb rom, like androidme light 1.3? Thanks, also for the amazing op!
[Samsung Galaxy Nexus] thumm138:
I've been cherry picking the backlight settings into my AOKP builds for a few weeks now. If you want I can post one to dropbox for you or you can search for euroskank his AOKP builds have it incorperated as well as his CM builds I believe.
[Samsung Galaxy Nexus] elnovio:
wow, thanks. If it would be possible for you to make an upload with your bl settings I would try to implement them as well. And thanks for your tip with euroskank!

P.S.: The possible implementation in AndroidMe light would be great (which has already great battery life, but with the settings of the automatic backlight it would be the best battery life solution for gnex!?)
[Samsung Galaxy Nexus] kyokeun1234:
Such a great tips... Why isn't this a sticky yet? lol
[Samsung Galaxy Nexus] Marcb:
you forgot to mention "Animations"

Go to "Developer Options", turn them ON!

Set all three animations to OFF

- Window animation scale

- Transition animation scale

- Animator duration scale

This is on Jelly Bean...
[Samsung Galaxy Nexus] Tim4828:
Lately I installed CodeNameAndroid custom rom version 3.5.0 and it has backlight adjustment settings. Performance wise is buttery smooth, you may consider installing it
[Samsung Galaxy Nexus] donsh00tmesanta:
I can't wait til its updated to sprint jb ota

-----------

Vaj tswv is the creation of people with nowhere left to turn
[Samsung Galaxy Nexus] TheCardPlayer:
?????

I am a bit confused about your results. You seem to get roughly 15 hours out of your GNex with all your battery saving tips. I have a Brand new Nexus, Stock Jellybean Stock 1750mAh Batt, and get about 1 day 10 hours on 3G with 15min updating emails - 1hr facebook - 2hr weather with medium use. I never use Wifi when i surf the web/sunc as my HSDPA is unlimited, faster and superior.

I was expecting 2 days of battery life out of this post. And what is that app in your results thats draining all your battery? some kind of game?

I will take pictures of my next discharge and post.
[Samsung Galaxy Nexus] yyz71:
:rolleyes::D:o:good:
[Samsung Galaxy Nexus] ahmadie:
nice guide
[Samsung Galaxy Nexus] Cmoore0965:
Bone stock, 4.1.2. Gsm, had at least a good hour and a half of hot spotting for the tablet last night, and 2 full rom downloads. I've found that basic battery cycle attention has been extremely rewarding with this battery.

Pink pony Gs2 i777

Pure Google Gnex i9250

Pink stallion Gs3 i747

Stock tweaked Asus tf201
[Samsung Galaxy Nexus] revolt1:
in custom settings how do no max out brightness when I'm outside I found the ones for being in the dark and dimming

but not for brightness
[Samsung Galaxy Nexus] menhaha:
Great tips! this must be one of the stickies:cowboy:
[Samsung Galaxy Nexus] chrone:
Having great battery life using this tips on stock 4.1.2 with 3g preferred all the way except when sleeping for 5 hours. :)

battery life: 1d 8h 30m

screen time: 3h 19m

Sent from my Galaxy Nexus
[Samsung Galaxy Nexus] throwback1718:
Most I do is disable my data when I'm not going to need it. Disable WiFi. Most of these times is when I text and don't need to cut on the data when im away from home (or a charger ). When I want my emails, Facebook etc. to update I just toggle the data enabler widget
[Samsung Galaxy Nexus] Winesnob:
Looks like you recharged midway through from those screenshots, making your actual battery life about 14 hours with 2.5 hours of screen on time. Those numbers are pretty normal for this device.