Develop Bugs

Galaxy Nexus Battery Fix

Hi,
I just got my Galaxy Nexus, flashed with AOKP build 18 and i gotta say that the battery life is unacceptable. It drops 10% in less then 1h while the phone is sitting there doing nothing. Wifi, bluetooth, location services, GPS are off. All background apps closed.
It lasts about half the time my iPhone 4 does and it is a year and half old.
I see some people showing examples of how their battery last for more then 20h but all these are BS tests as they leave the phone on standby all day or have some very light usage.
Is there a real fix for this? Am i forced to drop another 50$ and buy Samsung's 2100mh extended battery?
btw i tried setCPU also to lower CPU to minimum when in standby but doesnt do much. I want a solution that will enable me to use my phone, not something that makes it last 40h in standby and then kills it in 2h when i use it.
please help!

So everyone that posts four hours of screen on time is bullshitting? Did you know the first 10% isn't even that accurate? If you're on Verizon turn off LTE. If you're on GSM and you don't get three hours of screen on time you have an app that is killing your battery. It is as simple as that.
Sent from my Galaxy Nexus using xda premium

Try toggling Bluetooth on and then off, then grab CpuSpy from the market and check out if the CPU is pegged at a certain speed.
Some builds of ALL the custom ROMs have had issues where the phone wont sleep correctly, high %-age of Android System process, etc.
I disagree that its silly to talk about idle time on battery, because idle time is the closest we can all get to apples to apples comparison. We all USE our phones differently, the closest we come to using them the same is when they are just sitting there idle (not quite exact because some people sync data, some people only have 3G, etc, but a lot closer than person A playing games for 3 hours at a clip vs person B browsing for 3 hours)
I *still* havent seen anyone come up with a template like setup to report battery life. Like you said it does me no good to know someone dropped 3% "overnight" without knowing how long "overnight" is, if they had 3g/4g/Wifi enabled or even disabled completely, sync on/off, etc.
Personally, Ive seen 1.5%/hr drop with my phone idle. Running AOKP b19, LeanKernel, interactivex governor, undervolted (-75 mA at each level from 180 mhz to 1200 mhz), 4G on, BT on, GPS on, sync on (1 gmail account).
I imagine with all that stuff running 1.5%/hr isnt half bad. Screen on time isnt incredible but its not bad, but again my screen on activities can (and probably will) be different than your screen on activities so take that with several grains of salt.

joshnichols189 said:
So everyone that posts four hours of screen on time is bullshitting? Did you know the first 10% isn't even that accurate? If you're on Verizon turn off LTE. If you're on GSM and you don't get three hours of screen on time you have an app that is killing your battery. It is as simple as that.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
It's not the first 10%, it's all the time.. it drops for about 10% or more every hour. Less then 3h of screen time.
I'll give cpuspy a try and see if some app is killing my battery.
I used AOKP rom because most of the people in the thread were saying that rom fixed their battery issue but for me it made no difference.

angeluszero said:
It's not the first 10%, it's all the time.. it drops for about 10% or more every hour. Less then 3h of screen time.
I'll give cpuspy a try and see if some app is killing my battery.
I used AOKP rom because most of the people in the thread were saying that rom fixed their battery issue but for me it made no difference.
Click to expand...
Click to collapse
Yea somethings not right. Off charge at 8am and its 4:30pm now. Got 61% left at time of this writing and been using it quite alot. Typically have about 75% left about this time.
I just use an AOKP like yourself and a custom kernel. I'm on the phone like every 15min reading emails, SMS, word feud, twitter news, Facebook, Gmail.
LTE EX Galaxy Nexus - AOSP KANG
Asus Transformer - 3.2.1 OC/UV

It's actually 2000 mAh not 2100 mAh.
You can use a custom kernel such as Franco Kernel. New version came out today and includes more battery improvements (according to changelog!)

My phone essentially sits idle unless my screen is on...
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
As you can see, if my screen is on the graph drops, when it's off the graph flattens out and the battery barely moves. I used to be sick to my stomach of the battery life until I realized it was because I wouldn't put the phone down and always had the screen on thus killing the battery.
Sent from my Galaxy Nexus using XDA App

Powell730 said:
My phone essentially sits idle unless my screen is on...
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
Just a word of advice. Whites consume more power on AMOLED screens. You'd probably maximize your battery a lot more if you went back to a "Ice Cream Sandwich" feel or at least apply a black themed MIUI.

angeluszero said:
It's not the first 10%, it's all the time.. it drops for about 10% or more every hour. Less then 3h of screen time.
I'll give cpuspy a try and see if some app is killing my battery.
I used AOKP rom because most of the people in the thread were saying that rom fixed their battery issue but for me it made no difference.
Click to expand...
Click to collapse
I had something similar and it was recommended to me on these forums that I log out of Gtalk.
Before people come out and say it makes no sense - it doesn't really matter if it does or not - it worked for me. I get a full day out of a charge now, which doesn't really matter because as someone said above it's all relative. What DOES matter is that my phone is now sleeping properly, so the battery doesn't drain when the phone is idle. That's the part that wasn't working on my phone.
If you feel so inclined, give this a try and see if it works for you. Just log out of all Google talk accounts and see how your battery life is - you'll know within a day if it's helping.

Have you flashed the new radios yet?
You can also try different kernels and see which one works best for you.

zephiK said:
Just a word of advice. Whites consume more power on AMOLED screens. You'd probably maximize your battery a lot more if you went back to a "Ice Cream Sandwich" feel or at least apply a black themed MIUI.
Click to expand...
Click to collapse
Yeah I just installed this today, giving it a trial run. It's OK so far.. I think just growing pains so far. Also, I don't think themes work just yet.. At least last I saw.
Sent from my Galaxy Nexus using XDA App

Powell730 said:
Yeah I just installed this today, giving it a trial run. It's OK so far.. I think just growing pains so far. Also, I don't think themes work just yet.. At least last I saw.
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
Ah okay.
I think MIUI is pretty much at the same state as CM9. Just lots of work needing to be done since ICS revamped Android in so many ways.

zephiK said:
It's actually 2000 mAh not 2100 mAh.
You can use a custom kernel such as Franco Kernel. New version came out today and includes more battery improvements (according to changelog!)
Click to expand...
Click to collapse
not quite.
can i preface by saying that there are two types of Gnexus's out there? the SCH-i515 (CDMA/LTE Verizon) and the GT-i9250 (HSPA+, AT&T).
The 2000mAh is for the HSPA+ version
The 2100mAh is for the LTE version.
i see a LOT of bad advice on these forums here.
my best advice to you (from one Verizon Nexus owner to another), is to keep at stock 4.0.2. Root it, and apply a custom kernel. Only apply custom kernel if you feel that you're still not getting decent battery life for a whole day on 4G stock ROM/kernel.
As far as I know, Verizon Nexus owners' max on-screen time with 4G enabled all day is about 3 hours MAX, and thats if you disable everything else but LTE, with very low brightness settings, and on extended battery.
imo, the next 4.0.3 or 4.0.4 update hopefully will mitigate some battery consumption issues.

aohus said:
As far as I know, Verizon Nexus owners' max on-screen time with 4G enabled all day is about 3 hours MAX, and thats if you disable everything else but LTE, with very low brightness settings, and on extended battery.
Click to expand...
Click to collapse
Are you talking about 3 hours MAX browsing or just being POWERED ON?
If you are talking about just being on for 3 hours, you are GROSSLY incorrect.

angeluszero said:
Hi,
I just got my Galaxy Nexus, flashed with AOKP build 18 and i gotta say that the battery life is unacceptable. It drops 10% in less then 1h while the phone is sitting there doing nothing. Wifi, bluetooth, location services, GPS are off. All background apps closed.
It lasts about half the time my iPhone 4 does and it is a year and half old.
I see some people showing examples of how their battery last for more then 20h but all these are BS tests as they leave the phone on standby all day or have some very light usage.
Is there a real fix for this? Am i forced to drop another 50$ and buy Samsung's 2100mh extended battery?
btw i tried setCPU also to lower CPU to minimum when in standby but doesnt do much. I want a solution that will enable me to use my phone, not something that makes it last 40h in standby and then kills it in 2h when i use it.
please help!
Click to expand...
Click to collapse
See my screen on time?
4 hours screen on time including 21 minutes using gps for Sygic Navigation is not bull****. Stand by for up to 61 hours, easy.
And I was using the phone extensively for web browsing, facebook, gplus, xda, games, etc.
All with stock rom and stock kernel, extended battery 2000mAh, gsm.
No BS
Sent from my Galaxy Nexus using xda premium

gogol said:
See my screen on time?
4 hours screen on time including 21 minutes using gps for Sygic Navigation is not bull****. Stand by for up to 61 hours, easy.
And I was using the phone extensively for web browsing, facebook, gplus, xda, games, etc.
All with stock rom and stock kernel, extended battery 2000mAh, gsm.
No BS
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
You were on wifi the entire day.
You are using the HSPA+ version of the Nexus. HSPA+ version gets better battery life.
Try being on HSPA+ the entire day with wifi disabled. you will not be getting 4 hours of battery life on-screen time.
z06mike said:
Are you talking about 3 hours MAX browsing or just being POWERED ON?
If you are talking about just being on for 3 hours, you are GROSSLY incorrect.
Click to expand...
Click to collapse
Please reread what i wrote. MAX ON-SCREEN TIME.
it is not possible to go 4 hours of on-screen time with LTE enabled all day.

aohus said:
You were on wifi the entire day.
You are using the HSPA+ version of the Nexus. HSPA+ version gets better battery life.
Try being on HSPA+ the entire day with wifi disabled. you will not be getting 4 hours of battery life on-screen time.
Please reread what i wrote. MAX ON-SCREEN TIME.
it is not possible to go 4 hours of on-screen time with LTE enabled all day.
Click to expand...
Click to collapse
Most of the time I was on wifi, but not all.
But fair enough, I will test on 100% without WiFi. However, we don't have HSDPA+ unfortunately. Only HSDPA or 3G.
Sent from my Galaxy Nexus using xda premium

aohus said:
You were on wifi the entire day.
You are using the HSPA+ version of the Nexus. HSPA+ version gets better battery life.
Try being on HSPA+ the entire day with wifi disabled. you will not be getting 4 hours of battery life on-screen time.
Please reread what i wrote. MAX ON-SCREEN TIME.
it is not possible to go 4 hours of on-screen time with LTE enabled all day.
Click to expand...
Click to collapse
I went 13 hours yesterday with LTE on all day and had almost 4 hours of screen on time. I'm running stock ICS unrooted and all of my sync stuff is enabled. I'm also using the extended battery.
Sent from my Galaxy Nexus

johnbibbs said:
I went 13 hours yesterday with LTE on all day and had almost 4 hours of screen on time. I'm running stock ICS unrooted and all of my sync stuff is enabled. I'm also using the extended battery.
Sent from my Galaxy Nexus
Click to expand...
Click to collapse
would like proof. afaik, its impossible to get 4 hours of battery life with LTE enabled all day.
sounds dumb, but are you sure you have Verizon's GNexus? Your profile shows an AT&T carrier... otherwise you should probably update it.

player911 said:
Yea somethings not right. Off charge at 8am and its 4:30pm now. Got 61% left at time of this writing and been using it quite alot. Typically have about 75% left about this time.
I just use an AOKP like yourself and a custom kernel. I'm on the phone like every 15min reading emails, SMS, word feud, twitter news, Facebook, Gmail.
LTE EX Galaxy Nexus - AOSP KANG
Asus Transformer - 3.2.1 OC/UV
Click to expand...
Click to collapse
I think the Kernel is what makes the difference. It seems to be the only difference i see between myself and the people like you have a reasonable battery life.
which one do you recommend? And i'm a noob at this so could you point me to a thread the explains how to flash it? If u cant its ok im sure i can figure it out.

My guide for 18 hours battery life on Jelly Bean

I am here to share my experience to get 18 (around 5-8 hours screen time depend on your usage) hours normal usage, browsing chatting, facebook and calls.
2 days if you are not touching your phone at all, standby.
follow my guide, I think it's all about the Kernel but I shared the rom I used too just in case.
this guide is for GSM, might work on others just download the proper rom and kernel.
Optional, you can underclock to 1ghz but I didn't and got 18 means more if you underclock it.
http://nexus-hacks.blogspot.com/2012/08/how-to-increase-galaxy-nexus-battery.html

How many screen hours?
Sent from my GT-P3113 using xda app-developers app

Which Trinity kernel and AndroidMe rom version have you been using?
TNP1536-307-JB-STABLE35
TNP1420-307-JB-STABLE35
TNP1344-307-JB-STABLE35. Do you think this one would be a good choice to save battery?
Thanks.

wissamidrissi said:
I am here to share my experience to get 18 hours normal usage, browsing chatting, facebook and calls.
2 days if you are not touching your phone at all, standby.
follow my guide, I think it's all about the Kernel but I shared the rom I used too just in case.
this guide is for GSM, might work on others just download the proper rom and kernel.
Optional, you can undervolt to 1ghz but I didn't and got 18 means more if you undervolt.
http://nexus-hacks.blogspot.com/2012/08/how-to-increase-galaxy-nexus-battery.html
Click to expand...
Click to collapse
point 1: when you go to 1GHz , it's called underclocking. undervolting is when you lower the voltage for the corresponding processor frequencies.
point 2: 18h , but what about screen ON ? how much is the "normal usage" equivalent to, in terms of screen ON and the stuff that you're running on your phone.
it's nice to see you trying to contribute and thumbs up for the effort, and i really don't want to sound like an a-hole, but this is not a guide. flashing a custom rom + kernel, and letting the battery go through a few cycles cannot be considered as a guide with battery saving tips. Cheers mate.

shinydesert said:
which trinity kernel and androidme rom version have you been using?
Tnp1536-307-jb-stable35
tnp1420-307-jb-stable35
tnp1344-307-jb-stable35. Do you think this one would be a good choice to save battery?
Thanks.
Click to expand...
Click to collapse
tnp1536-307-jb-stable35
rayiskon said:
point 1: when you go to 1GHz , it's called underclocking. undervolting is when you lower the voltage for the corresponding processor frequencies.
point 2: 18h , but what about screen ON ? how much is the "normal usage" equivalent to, in terms of screen ON and the stuff that you're running on your phone.
it's nice to see you trying to contribute and thumbs up for the effort, and i really don't want to sound like an a-hole, but this is not a guide. flashing a custom rom + kernel, and letting the battery go through a few cycles cannot be considered as a guide with battery saving tips. Cheers mate.
Click to expand...
Click to collapse
You are right, but I learned now ^^
well around 8 hours normal usage of screen time (screen awake), and when I am on a phone call and the screen is off it toke 1% every 10mins
pardon my English

delete this reply cuz I don't find how.

Yah I hate to be that guy but where's the guide? Everyone uses their phone different. You should at least show your battery usage screen shot so we can see screen time etc.

What? Are you telling me that you get 8hrs of screen on time? Is this trolling or just a language barrier?
wissamidrissi said:
tnp1536-307-jb-stable35
You are right, but I learned now ^^
well around 8 hours normal usage of screen time (screen awake), and when I am on a phone call and the screen is off it toke 1% every 10mins
pardon my English
Click to expand...
Click to collapse

lightsout said:
Yah I hate to be that guy but where's the guide? Everyone uses their phone different. You should at least show your battery usage screen shot so we can see screen time etc.
Click to expand...
Click to collapse
sorry, I wiped stats but you can study this.
just look at my charge time compared to the times I am using phone, and because it last longer I don't care when its red and low, I was in 5% from 9pm to 11pm chatting from time to time and facebook, and btw my wifi is always on.
and pardon me I am new Xd I am just sharing something not an expert or something but next time I will make sure : it's called underclocking <- I though both are same, and post screenshot and screen on time
EDIT: I think I should charge it to 100% and make it drain then share pics with you guys, that's the proper way for screenshot right Xd? cuz mine looks like a mess XD

My guide for 18+ hours:
Stock.
Sent from my Nexus 7 using xda premium

El Daddy said:
My guide for 18+ hours:
Stock.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Nice XD but I love messing around my phone stock is just... normal XD

Your phone was plugged in multiple times throughout your screenshots. So yes, you should redo screen shots from 100% and include display on time.
It doesn't really matter though, as no one will see your same results unless they use their phone the exact same way.
And under clocking is unnecessary on the nexus, it doesn't spend hardly any time at 1200mhz anyway. I use mine for a lot of game play and still don't spend much time over 691mhz (Trinity kernel). So if my phone decides it does need to ramp up to 1190mhz to remain buttery smooth I'm not going to interfere.
Sent from my SGH-T959V using xda premium

Nice. Will check this out.. I run my phone down pretty quick these days heh

I'm not understanding why you prefer 1.5 trinity kernel and 307 gpu. What benefit are you seeing versus the other trinity kernels with higher gpu and lower overclock limits? Are you running your phone at 1.5?
Sent from my Galaxy Nexus using Tapatalk 2

El Daddy said:
My guide for 18+ hours:
Stock.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Same here. I have no problem getting 18 hours out of my stock battery using the stock ROM and kernel, including just shy of 6 hours of screen on time.

I dont know that I would call this a guide. Its saying to use a certain rom and kernel and to charge the phone. . . . .

hey thanks for the write up... i used it alone to change the colors! now my screen isn't yellow.
question though... when I adjust my colors manually, when I go to 0 percent brightness, everything goes like super green... like crazy looking lol.. but at 3 percent it's fine again... any idea why this happens and how I can fix it to get true 0 percent? thanks!
Sent from my Galaxy Nexus using Tapatalk 2

I'm using a stock one and all I can say is: Just dont use Nexus as a videogame.
I got 3 days and some hours of battery talking some minutes and using wifi for some time (probably 4 hours overall).
Playing sucks up the battery life. At least for me.
A normal day of use, with wifi active, many calls, auto bright and SetCPU profiles gives me 'bout 18-24 hours of use.
A intense play day gives me 8 hours. And I think its generous.
:victory:

jayochs said:
hey thanks for the write up... i used it alone to change the colors! now my screen isn't yellow.
question though... when I adjust my colors manually, when I go to 0 percent brightness, everything goes like super green... like crazy looking lol.. but at 3 percent it's fine again... any idea why this happens and how I can fix it to get true 0 percent? thanks!
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
Finally I helped one person, thanks man I love you XD
and this guide is just experience, because most people are wondering what is best rom and kernel combination, well this was best for me at least.

full stock

Poor Battery Life

Hi All,
My Gnex 9250 has a poor battery life, My brother has the same phone and his battery last much longer(with 3g) than mine. Please help.
1130 AM - Battery 100%
1 and half hour Music(Player Pro) - Not much screen activity(with 2G enabled)
2G on for 6 hours, Pretty long texting.
about 45 Minutes of Browsing(2g)
10 Mins on Voice calls.
No Widgets.Background apps = Swiftkey,Go launcher(No theme),Profile scheduler.
By 12am battery was 20%
Screen brigntness is VERY low so its not that, Its about 20%.
Phone is about a month old.
Thanks in advance.
EDIT - 4.1.1(No available updates)

The fact your battery goes over 12hrs seems it's not too bad with moderate use. And who knows if your bro uses his as much as he says? If you want to compare then look at his battery stats in settings next to yours.
Try a different ROM? Kernel?
Sent from my Galaxy Nexus using Tapatalk 2

untruestory said:
The fact your battery goes over 12hrs seems it's not too bad with moderate use. And who knows if your bro uses his as much as he says? If you want to compare then look at his battery stats in settings next to yours.
Try a different ROM? Kernel?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
Thanks for your reply.My brother does use as he said, Ive seen his battery stats, uptime was 1 day 9 hours(14% then). He doesnt text half as much as I do, but his voice calls are much more than mine. Also hes on 3g thats a bigger battery hog than 2g. Not too keen on changing the Kernel/Rom.
Could it be SwiftKey and Go launcher? He doesnt use either of them.
Thanks again.

sl4y3r88 said:
Hi All,
My Gnex 9250 has a poor battery life, My brother has the same phone and his battery last much longer(with 3g) than mine. Please help.
1130 AM - Battery 100%
1 and half hour Music(Player Pro) - Not much screen activity(with 2G enabled)
2G on for 6 hours, Pretty long texting.
about 45 Minutes of Browsing(2g)
10 Mins on Voice calls.
No Widgets.Background apps = Swiftkey,Go launcher(No theme),Profile scheduler.
By 12am battery was 20%
Screen brigntness is VERY low so its not that, Its about 20%.
Phone is about a month old.
Thanks in advance.
EDIT - 4.1.1(No available updates)
Click to expand...
Click to collapse
there are lots of thing that can affect your battery life one of it is the kernel ur using.
I already have this problem before.
i've tried lots of custom rom. the only custom rom that solve this battery issues is from Android Revolution HD 7.0.0
from this: http://forum.xda-developers.com/showthread.php?t=1361348

imo the best battery/performance kernel out there is franco's. try it, battery will be 2x to 3x longer.
if you like to fool around with what's chewing battery you can get better battery stats and it will tell you what keeps your phone from going to sleep. sometimes nothing, sometimes crappy app that messes things up
good luck!

Thanks to all for your replies.
Guess that 12 hours is not bad afterall right? Seems like that from the first reply I got.
Unfortunatly I have no time to re-flash a differnt ROM/Kernel. But thanks for all reccomendations.

sl4y3r88 said:
Thanks to all for your replies.
Guess that 12 hours is not bad afterall right? Seems like that from the first reply I got.
Unfortunatly I have no time to re-flash a differnt ROM/Kernel. But thanks for all reccomendations.
Click to expand...
Click to collapse
its a smartphone 12 hours is good imo

Buy the Samsung extended battery. It helps a lot.
http://www.ebay.com/itm/Genuine-Sam...462058?pt=PDA_Accessories&hash=item1c222d0cea
http://www.ebay.com/itm/150802739042?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

sl4y3r88 said:
Thanks for your reply.My brother does use as he said, Ive seen his battery stats, uptime was 1 day 9 hours(14% then). He doesnt text half as much as I do, but his voice calls are much more than mine. Also hes on 3g thats a bigger battery hog than 2g. Not too keen on changing the Kernel/Rom.
Could it be SwiftKey and Go launcher? He doesnt use either of them.
Thanks again.
Click to expand...
Click to collapse
You say that your brother doesn't text as much as you but he uses voice calls more. Remember that when you're texting the screen is on and that has a big impact on battery life.

There's not a kernel, ROM, or flying saucer out there that can triple battery life Just saying. People get fanatical about certain ROM/kernel combos. The usual suspects are leaving on things you don't need and on occasion an app. People claim that different things work better on different phones but I think it's a bunch of crap. Much of what you hear is placebo.
I'm a fan of Trinity myself
Sent from my Galaxy Nexus using Tapatalk 2

whpsnp said:
You say that your brother doesn't text as much as you but he uses voice calls more. Remember that when you're texting the screen is on and that has a big impact on battery life.
Click to expand...
Click to collapse
untruestory said:
There's not a kernel, ROM, or flying saucer out there that can triple battery life Just saying. People get fanatical about certain ROM/kernel combos. The usual suspects are leaving on things you don't need and on occasion an app. People claim that different things work better on different phones but I think it's a bunch of crap. Much of what you hear is placebo.
I'm a fan of Trinity myself
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
Both valid points.
Sent from my i9250

battery life

I recently bought a used nitro hd and unlocked it for use on t-mobile. I lose about 4% battery life per hour while in standby. bluetooth, gps, wifi are all off. cell radio is the only thing on. phonearena reports a 259 hour standby life, and at this rate I will get about 25 hours of standby time. and perish forbid I use the phone, when I can literally watch the battery percentage drop before my eyes. I lose about 1% every 2-3 minutes when using it. I have tried v20c and CM10 stable.
does this sound like a problem that can be dealt with somehow, or am I looking at a new battery? thanks.

reebokhcfr said:
I recently bought a used nitro hd and unlocked it for use on t-mobile. I lose about 4% battery life per hour while in standby. bluetooth, gps, wifi are all off. cell radio is the only thing on. phonearena reports a 259 hour standby life, and at this rate I will get about 25 hours of standby time. and perish forbid I use the phone, when I can literally watch the battery percentage drop before my eyes. I lose about 1% every 2-3 minutes when using it. I have tried v20c and CM10 stable.
does this sound like a problem that can be dealt with somehow, or am I looking at a new battery? thanks.
Click to expand...
Click to collapse
Habe you tried disabling LTE? It may be because your phone is constantly searching for an LTE signal that it's wasting so much battery.
CM10 and V20c are not particularly great with battery life. You might try CM9 if you want to see if it makes a difference.

thank drumist. I forgot to mention I also downclocked the processor to 1ghz with cm10 with not much noticeable effect. in cm10, under preferred network mode, gsm/wwcdma preferred is checked. lte is not.I also lost a full 1% just checking that.

reebokhcfr said:
thank drumist. I forgot to mention I also downclocked the processor to 1ghz with cm10 with not much noticeable effect. in cm10, under preferred network mode, gsm/wwcdma preferred is checked. lte is not.I also lost a full 1% just checking that.
Click to expand...
Click to collapse
While in that same screen you selected gsm/wcdma, if you go to Access Point Names and switch it from ATT LTE to ATT you might see some improvement. Also, HO!NO!s Full Throttle seems to be quite good on battery life. It's CM9 based and it's pretty snappy. I've got it overclocked to 1728mhz and have been playing with mine almost constantly for about 5 hours so far today and I'm at 66% left.

lordcheeto03 said:
While in that same screen you selected gsm/wcdma, if you go to Access Point Names and switch it from ATT LTE to ATT you might see some improvement. Also, HO!NO!s Full Throttle seems to be quite good on battery life. It's CM9 based and it's pretty snappy. I've got it overclocked to 1728mhz and have been playing with mine almost constantly for about 5 hours so far today and I'm at 66% left.
Click to expand...
Click to collapse
You went back form pA 2.5x, eh? I'm currently running 1d 6hrs with 2hrs+ screen on time and at 14% bat life on FT.
Sent from my LG-P930 using xda app-developers app

X0dus said:
You went back form pA 2.5x, eh? I'm currently running 1d 6hrs with 2hrs+ screen on time and at 14% bat life on FT.
Sent from my LG-P930 using xda app-developers app
Click to expand...
Click to collapse
That's why I've been playing with it so long today lol. After reading what you said the other day I had to give it another try. I do miss phablet mode though! What all have you done to it to get such ridiculous stats?
Also, I do tend to ROM hop a pretty good bit. I've tried every ROM in the Dev section except Liquid Nitro; PA just seems to be my fallback.

lordcheeto03 said:
That's why I've been playing with it so long today lol. After reading what you said the other day I had to give it another try. I do miss phablet mode though! What all have you done to it to get such ridiculous stats?
Also, I do tend to ROM hop a pretty good bit. I've tried every ROM in the Dev section except Liquid Nitro; PA just seems to be my fallback.
Click to expand...
Click to collapse
Left the OC at 1728. Left the GPU OC as is. I under volted -75 from 192mhz to 1026, then -50 up to 1512 and -25 above that. I leave sync off. Only have wifi on constantly when plugged in. I freeze Google Maps until I need it (constantly runs). Diplay-automatic backlight enabled-sample intervel 5s. Performance-memory management-allow purging of assets checked. And follow this guide for calibration: http://forum.xda-developers.com/showthread.php?t=1616598 ... I think that's about it. Oh, I also let it settle in for a few days before judging life of the battery.
EDIT: I also ROM hop often. Liquid Nitro is the only one I haven't tried, too. I love pA JB but the battery life drives me nuts (have a backup though). I'm lucky to get 8hrs out of a charge. I can't wait for thomas.raines to finish is LZ JB kernel. That's gonna improve things quite a bit.

X0dus said:
Left the OC at 1728. Left the GPU OC as is. I under volted -75 from 192mhz to 1026, then -50 up to 1512 and -25 above that. I leave sync off. Only have wifi on constantly when plugged in. I freeze Google Maps until I need it (constantly runs). Diplay-automatic backlight enabled-sample intervel 5s. Performance-memory management-allow purging of assets checked. And follow this guide for calibration: http://forum.xda-developers.com/showthread.php?t=1616598 ... I think that's about it. Oh, I also let it settle in for a few days before judging life of the battery.
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Click to collapse
Where do you set the uv settings? I swear I've read the entire FT thread but I must have missed it.

lordcheeto03 said:
Where do you set the uv settings? I swear I've read the entire FT thread but I must have missed it.
Click to expand...
Click to collapse
/ect/init.d/99ocvoltcontrol
/ect/init.d/99GPUoverclock if you wanna oc the GPU more which I've done but caused overheating.

thanks for the responses. I am trying FT and it seems better, but I lost 50% of battery with the phone off between yesterday and today. 50% with it off! what the heck?

reebokhcfr said:
thanks for the responses. I am trying FT and it seems better, but I lost 50% of battery with the phone off between yesterday and today. 50% with it off! what the heck?
Click to expand...
Click to collapse
Try this: http://forum.xda-developers.com/showthread.php?t=1616598

[Q] Hows the Battery Life?

Hi everyone.. im currently using ATT s3 and get onscreen time of max 4hrs on wifi and 2hours-ish on 4g. Im thinking of switching to note 2. hows the battery life on the phone considering the 3100 mA battery
thanks

Lots of threads on it, but here is mine from yesterday:
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

I can get about 2 days off a charge.
Min talk. I don't talk alot
Excessive txt
Excessive web
Min streaming
I use wifi where avaliable
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Battery
moinsheriff said:
Hi everyone.. im currently using ATT s3 and get onscreen time of max 4hrs on wifi and 2hours-ish on 4g. Im thinking of switching to note 2. hows the battery life on the phone considering the 3100 mA battery
thanks
Click to expand...
Click to collapse
Excellent! with heavy use of ~ 200 emails a day 1h on internet and about 30min looking up news and 1-2h of calls i get 12-16h.

I tried the best I knew how and I couldnt kill the battery for 2 days. I ran everything at once (not truly everything) and it just wouldn't die.
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

Battery is ridiculous. After diagnosing my wifi wakelock issue and installing jedi rom I get 4 hoursish per 1% when it goes into sleep, and that's in a basement mostly with horrible reception.

im getting worse battery life ever since the multiwindow update. not sure if anyone else has the same issue, but it seems like tmobile users are complaining about the same thing. it might be due to lack of battery calibration.

Well, here's a visual. Just achieved this impressive feat. 81 HOURS on pure battery! Almost 3.5 hours of screen-on time. I choose to not utilize my phone much over the holiday weekend, so that explains the low screen-on time. Regardless, I think these results are more than impressive. Nothing was restricted on my device. Live wallpaper going the whole time, auto screen brightness (usually a high setting), WiFi going, auto-syncing from emails to Facebook to Twitter, watched a bit of "The Dark Knight Rises" in full-1080p HD, made a bunch of miscellaneous phone calls. I am more than amazed at this phone and its battery. Haven't seen anything close to this in more than five years or so. These results are after updating to 4.1.2 with multi-window, and these are the best results I've ever gotten on this device.
On a side note, if anyone is getting results like the first poster with 8+ hours of screen-on time, it would really help if you described what you typically do with your phone and what you may have done to your phone. Just posting a screenshot tells nothing. You could be web browsing all day with your screen set to 20% brightness, and nothing more. What are you doing? Watching movies? Listening to music? Emailing? Texting? And if you're rooted that makes a ton of difference, so the results wouldn't be exactly truthful or accurate I should say.

Dr. Evo said:
Well, here's a visual. Just achieved this impressive feat. 81 HOURS on pure battery! Almost 3.5 hours of screen-on time. I choose to not utilize my phone much over the holiday weekend, so that explains the low screen-on time. Regardless, I think these results are more than impressive. Nothing was restricted on my device. Live wallpaper going the whole time, auto screen brightness (usually a high setting), WiFi going, auto-syncing from emails to Facebook to Twitter, watched a bit of "The Dark Knight Rises" in full-1080p HD, made a bunch of miscellaneous phone calls. I am more than amazed at this phone and its battery. Haven't seen anything close to this in more than five years or so. These results are after updating to 4.1.2 with multi-window, and these are the best results I've ever gotten on this device.
On a side note, if anyone is getting results like the first poster with 8+ hours of screen-on time, it would really help if you described what you typically do with your phone and what you may have done to your phone. Just posting a screenshot tells nothing. You could be web browsing all day with your screen set to 20% brightness, and nothing more. What are you doing? Watching movies? Listening to music? Emailing? Texting? And if you're rooted that makes a ton of difference, so the results wouldn't be exactly truthful or accurate I should say.
Click to expand...
Click to collapse
Sorry for the lack of detail, I should have included that. I was browsing the net on wifi, playing Words, emailing/texting, various phone calls, watching youtube videos, and spending time on the XDA app. (of course)
I'm rooted and using clean rom 3.5. Auto brightness is on and I'm about 50% on the slider.
Here is where I sit today: (not much youtube though)
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

^^^ Thanks. So, that does change things, since you're rooted. The reason why I'm making a big deal about it, is because your results (and anyone else rooted) aren't typical results of someone stock. So a person not knowing any better would assuming they'd get your battery results from stock.

How is that possible? I use my note for about 5hrs of screen time and it's at like 3%. I am on an international rom and I undervolted along with perseus 1.8ghz kernel. Even when I did not have perse us, I never got above 6hrs? What settings do you use? I'm on wifi all day with the brightness All the way down. Please let me know! I really want to get that 8hrs of screen on time!
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

UrbanLagoon said:
How is that possible? I use my note for about 5hrs of screen time and it's at like 3%. I am on an international rom and I undervolted along with perseus 1.8ghz kernel. Even when I did not have perse us, I never got above 6hrs? What settings do you use? I'm on wifi all day with the brightness All the way down. Please let me know! I really want to get that 8hrs of screen on time!
Sent from my SAMSUNG-SGH-I317 using xda app-developers app
Click to expand...
Click to collapse
Clean Rom 3.5, I also make sure and close out of anything I'm not using. I also use the ES Task Manager widget to clear my ram before I power down for any period of time.
That's about it, besides not having a ton of widgets running.
I didn't get much over six hours of screen time with my Jedi Rom, but in fairness to it, it was my first rom and I don't think I did it quite right, installing other things with it that probably weren't compatible.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app
---------- Post added at 09:14 PM ---------- Previous post was at 09:09 PM ----------
Dr. Evo said:
^^^ Thanks. So, that does change things, since you're rooted. The reason why I'm making a big deal about it, is because your results (and anyone else rooted) aren't typical results of someone stock. So a person not knowing any better would assuming they'd get your battery results from stock.
Click to expand...
Click to collapse
Like Dr. Evo points out, one of the great things about custom roms is they get rid of all the bloatware from ATT and other carriers. Stock I was lucky to have 1gb of free ram at any time, now I'm always around 1.1-1.2gb free without much effort on my part.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app