Develop Bugs

[Q] Battery issue?

Here's a screenie from my battery screen, I know the battery is a common problem, but when I see shots from others battery screen their screen and OS percentages seem much lower. My screens set at about 20-30%. Just wondering if I'm doing something wrong, or any suggested apps/roms you have. Rooted CDMA.
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Sent from my Galaxy Nexus using Tapatalk

Te longer you have the screen ON and are using the device then the more power it uses over a period of time

Tap on the screen % to see your screen on time. This device currently sucks a lot of power through the high pixel display. You can switch to manually adjusting seen brightness to save some battery.

irb123 said:
Here's a screenie from my battery screen, I know the battery is a common problem, but when I see shots from others battery screen their screen and OS percentages seem much lower. My screens set at about 20-30%. Just wondering if I'm doing something wrong, or any suggested apps/roms you have. Rooted CDMA.
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Looks fine to me. My android os is usually around 15% or so depending on how much I use the phone and I get great battery life.
Sent from my Galaxy Nexus using xda premium

@rbiter I am curious how long has your Galaxy Nexus been running before it turns off? I have gotten about 8.5-9 hours the one time i ran mine all the way down. That is with auto brightness on and lots of browsing and no games and some calls.
Frankly I have been disappointed with the battery performance so far. I love the phone of course, but just wished they would come out with replacement stock batteries so I can go as long
as i need, without having to swap out the backs etc.

@rbiter I am curious how long has your Galaxy Nexus been running before it turns off? I have gotten about 8.5-9 hours the one time i ran mine all the way down. That is with auto brightness on and lots of browsing and no games and some calls.
Frankly I have been disappointed with the battery performance so far. I love the phone of course, but just wished they would come out with replacement stock batteries so I can go as long
as i need, without having to swap out the backs etc.
Click to expand...
Click to collapse
You could always just use the extended battery w/ the extended battery back cover. That cover works also fits pretty well with the stock battery.

Nexus battery issue

Hi all. I have a gnex that has horrible battery life. I have tried using the stock battery and the OEM extended battery however I will only get about eight hours of use. I am running cm10 with lean kernel. I have overclocked, under clocked, and undervolted but has made no difference. I am including some screenshots so someone can try to help me or at least tell me I'm not alone lol.
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Sent from my Galaxy Nexus using xda app-developers app

How much screen time? Press screen in the battery option.
Sent from my SPH-D710 using xda app-developers app

1. Don't overclock
2. Don't use LTE
3. Keep your screen as dim as possible
4. CM isn't really known as a battery saver rom. Its more of a performance with stability type rom
5. Test out other kernels.
6. Check your apps to make sure you don't have one that's killing your battery
7. GPS should be off
8. Turning sync off will help too
Oh ya and questions go in the Q and A forum
Sent from my Galaxy Nexus

If you're constantly in areas with low signal and data on, your battery will drain from trying to get a signal.
Sent from my Galaxy Nexus using xda premium

Well it seems like you're using the phone pretty hard on LTE with a 1.6ghz overclock... Sounds about right.

martonikaj said:
Well it seems like you're using the phone pretty hard on LTE with a 1.6ghz overclock... Sounds about right.
Click to expand...
Click to collapse
Yes, way overclocked. Is your phone actually using that frequency and is it stable. Lean exp. 5 can under clock on the low side to 180. Try that.
Actually your battery life seems quite normal.
Some folks are saying that Diet kernel gives great battery life. I haven't tried it yet. I'm wondering if it will slow my phone down too much. I'm loving the speed and stability of Lean kernel.
Sent from my Galaxy Nexus using Tapatalk 2

GSM vs CDMA - HUGE difference in battery life?

I recently switched from AT&T to Sprint and have the Galaxy Nexus on both services.
My signal for Sprint is better than AT&T at my house and I just ran my first battery test to find that with 2 hours of screen time I got roughly 4 hours of battery life on the Sprint phone verses the AT&T phone which I could easily get at least a day out of it...
Is there really that huge of a difference between the AT&T version versus the Sprint version in regards to battery life?
If this is the case, and the battery life on the Sprint version is this bad, I don't know what to do because there's no way I can only go 4 hours without having to plug it in.
Any and all help is greatly appreciated!
Sent from my Galaxy Nexus using xda app-developers app

Yep pretty big difference.
LTE on the GN is a separate radio, so you have two radios running at once. Battery killer bigtime.

adrynalyne said:
Yep pretty big difference.
LTE on the GN is a separate radio, so you have two radios running at once. Battery killer bigtime.
Click to expand...
Click to collapse
True but you can disable the LTE radio in advances network settings. That being said, there's still a huge difference. I can only get 3 hours screen on and thats only if I unplug at 100% and use my phone nonstop til it dies. Realistically I get 2 hours screen on a day.

I have the Verizon gnex and I get about 1.25 hours of screen time and at least 10-13 hours of life. Of course I can't live without having certain accounts syncing so I just had to suck it up and live with it. I tried many roms and different methods of trying to get more screen time and lasting the whole day... just not going to happen. Seeing that sprint is also CDMA, the likelihood of getting a impressive battery life is slim.
If you haven't yet, try rooting and putting a custom ROM. I'm running cm10 and I really like it.
Sent from my Nexus 7 using xda premium

Sprint, stock OTA. 2100mah OEM battery free courtesy of Sprint.
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Sent from my AOSP Android 4.1.1 Galaxy Nexus.

On wifi, naturally.

I need to get me one of those batteries! I guess I'll have to talk to Sprint tomorrow. Barely touched the phone today and didn't even last till the sun went down...
Thank you all for the input!
Sent from my Galaxy Nexus using xda app-developers app

mister2quick said:
I need to get me one of those batteries! I guess I'll have to talk to Sprint tomorrow. Barely touched the phone today and didn't even last till the sun went down...
Thank you all for the input!
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Ya just call their customer service. Theres a thread over at the accessories forum about it.
And if you turn off 4g while using at least half the battery on wifi, you might get 2 hr screen time. Thats my experience on big red
Sent from a Galaxy far far away

Battery Drain vs Frequency

Question: I've noticed that my battery drain will often exceed -1000mA at low cpu frequencies, e.g. 350mHz.
This usually happens when wifi or 3g is on and I assume something is syncing. What is the mechanism behind high drain under low cpu load?
Details:
Codename Android 3.8.0
Samurai 10/10 kernel, -25mV undervolt
350/1200 mHz, dyninteractive gov
Sent from my Galaxy Nexus using Tapatalk 2

Anybody? This really has me puzzled - cpu is currently running at 350mHz but is pulling 1300mA and is draining the battery at the rate of -56%/hr. 3G is on,with relatively good signal.
Sent from my Galaxy Nexus using Tapatalk 2

Maybe you have a wakelock?

i'm puzzled as well. i know that underclocking can cause battery drain from the cpu actually having to cycle more for certain tasks at lower clock speeds than it would at a higher clock speed, but that's about all i can add to the discussion and i'm not sure it really pertains here.
what is your screen off max freq?

a 1A drain is telling me something is either wrong, or everything is active on the phone (screen brightness, nfc, bt, wifi, 3g, gps) etc etc. Need more info

Darunion said:
a 1A drain is telling me something is either wrong, or everything is active on the phone (screen brightness, nfc, bt, wifi, 3g, gps) etc etc. Need more info
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Click to collapse
I'm a battery freak, so nfc, GPS, and bt are always off and brightness is usually at 4%. I use push Exchange and manually sync my other accounts.
This has been a consistent issue with this phone. It typically drains at -30 to -600mA, but will sometimes spike to -1000+. My battery will last 10+ hrs with 5+ hrs of screen time, but I'd like more.
Sent from my Galaxy Nexus using Tapatalk 2

Esterra said:
Maybe you have a wakelock?
Click to expand...
Click to collapse
No wakelock issues...this happens when the screen is on.
Sent from my Galaxy Nexus using Tapatalk 2

BMW screen cap of the high drain:
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[Q] Best rom for battery life?

Please my phone litterally died in 3 hours from full charge with 1hour screen on time
Running FINAL SOurcery and Faux 29u kernel underclocked at 1000 mhz with intelli demand

First things first, don't ask "best" type questions on xda. Everybody has different experiences.:good:
That being said, I am personally always running the latest AOSPA (Paranoid Android) and latest AK kernel. Great ROM, and absolutely perfect kernel. I usually get around 3 hours on screen time with that combo.
Of course, you have to remember that there are many many factors that impact battery life. For example, if you have data turned on (either 3g or 4g), gps on, or brightness high, your battery will suffer. Search the forums for various ways to improve battery life.

I always have the best results running stock for battery life.
Sent from my Galaxy Nexus using Xparent Skyblue Tapatalk 2

Slim ROM + Fancy Kernal

Maybe you should look into purchasing a new battery.
Sent from my Galaxy Nexus

Beezer80 said:
Maybe you should look into purchasing a new battery.
Sent from my Galaxy Nexus
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^^^This. If you are having that crappy of battery life, its most likely the battery itself. No ROM or kernel is going to help you.

Mine too and i have baked +Franco.
Sent from my Nexus 7 using xda premium

Buy extended, cost me 5$ with case! XD
This is heavy use (3G only, no WiFi) also I'm with wind so having a crappy network signal kills it even more, yours will most likely look better.
Running latest CM 10.1 nightly and Franco kernel r378
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The drop here was me playing a game called shadow gun dead zone, with Bluetooth active to connect six axis controller.
Sent from my GNEX

Best ROM threads aren't allowed.
Thread closed.