Develop Bugs

Getting GREAT battery life with new ROM (Lost just 20% in 16 hours)

See here: http://forum.xda-developers.com/showthread.php?t=1361108
Lost just 20% in 16 hours. This is of course with JuiceDefender and airplane mode scheduled to run over night. But it's still impressive as we used to get battery drains even at times phone was supopsed to sleep and AirPlane mode on.
My baseband is UGKK7, but that's not what cured it, I had this baseband installed days earlier and battery drain was awful.
In my case it appears all battery problems are cured:
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What's your standby current draw? In my HD2 android, I had about 4-9ma. But in Galaxy Nexus it's about 19-40ma which is pretty high. Judging from your screenshot, yours is 16ma in standby?

Possibly, I have no idea. Nexus is known from high default cpu voltage, maybe thats that or maybe it's my apps waking phone every now and then to check things, for example LED light notification app or Juice Defender.
Anyway, I'm pretty happy now, might tweak it some more when I have time, but it's now at the same level as my old SGS2, I'd say a bit better (I think I had 5% night drop on AirPlane mode on SGS2, but again it depends on apps).

luffyp said:
What's your standby current draw? In my HD2 android, I had about 4-9ma.
Click to expand...
Click to collapse
Just checked: it was constant -5mA throughout the night.

Have you, knowing you want to see good results, un-knowingly played less with your phone on this rom?
Sent from my Galaxy Nexus using xda premium

Tjotte said:
Have you, knowing you want to see good results, un-knowingly played less with your phone on this rom?
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
That's not it, I know battery will go down when I actively use it. What I noticed is that I get great results when phone is idle. This didn't happen before, you would see battery drain even when idle at night in AirPlane mode. This means light use should also give better battery performance than before, I will be testing that.
Sent from Galaxy Nexus using Tapatalk

This is with Google+ and Facebook signed in. I just disabled all notifications from these apps and they appear to function properly, do not keep awake when not run.

schriss said:
This is with Google+ and Facebook signed in. I just disabled all notifications from these apps and they appear to function properly, do not keep awake when not run.
Click to expand...
Click to collapse
I dont know what I did but while IDLe, I get about 1% drain per hour, thats on 3G, sync on (gmail, google+, etc), no juicedefender or airplane mode.
I only tested it overnight, when Im sleeping, notice the ZERO wake locks and crappy signal; unbelievable!
Disclaimer: this was while I was sleeping, NO usage. Battery obviously goes down much quicker once the screen is on, but for idle time, I am content!

schriss said:
That's not it, I know battery will go down when I actively use it. What I noticed is that I get great results when phone is idle. This didn't happen before, you would see battery drain even when idle at night in AirPlane mode. This means light use should also give better battery performance than before, I will be testing that.
Sent from Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
ok, thank you keep on testing and keep us informed, always nice to get some info! Merry X-mas!
Sent from my Galaxy Nexus using xda premium

thats great to see how long it lasts while youre not using the phone... but how about while youre actually using it?

voxigenboy said:
thats great to see how long it lasts while youre not using the phone... but how about while youre actually using it?
Click to expand...
Click to collapse
For real... All these people posting up 15-20 hours of battery by putting it on airplane mode overnight is just useless info. Especially when most people put it on the charger overnight
Sent from my Galaxy Nexus using XDA App

Happy! said:
For real... All these people posting up 15-20 hours of battery by putting it on airplane mode overnight is just useless info. Especially when most people put it on the charger overnight
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
It is not useless info. Previously, when putting in AirPlane mode and not using the phone at all we would see big battery drain. Now we don't. This is to proove that now the phone actually goes to sleep whenever I don't use it. This is proper testing before and after applying one change.

voxigenboy said:
thats great to see how long it lasts while youre not using the phone... but how about while youre actually using it?
Click to expand...
Click to collapse
I will know next time I go to work. But since I never use it for all these 8-10 hours straight, I should have better battery, because whenever I will put the phone away, even for another 15mins, battery will stop dropping like it used to.
In other words, it will most likely still drop as usual while actively using the phone, but in overall I should get more battery because of much more efficient idle times.

3% battery drain every 5 min. normal?

I know this is another battery topic, but specifically I am getting a drain of about 3% every 5 minutes while browsing the web on data. I am getting this drain at both 50% and 20% brightness. This drain seems high to me. I mean, during that 5 minutes, I am mostly just browsing one long page, so there is not much data activity going on in any case. Bluetooth, gps, and wifi are all off. I would like to hear other folks' experience.
Edit: my old hd2 with a small 1250 battery is running android and is only losing 1% every five minutes while doing the same thing!!

Possibly. Screen white or black factor. Type and speed of connection. Background processes. Battery temp. But that is a little higher.
Sent from my Galaxy Nexus using xda premium

If your on LTE that's your problem. Try to use wifi as much as possible.
Sent from my Galaxy Nexus using XDA App

Same for me. I'm not on LTE, I'm on 3g in Sweden. Just tried it myself and it drained 3% in 5 min of surfing with the stock browser.
And 2% more while writing this reply, that took 2 minutes.
Sent from my Galaxy Nexus using Tapatalk

The battery seems to drain ridiculously fast when you're using the device.

X-Ter said:
The battery seems to drain ridiculously fast when you're using the device.
Click to expand...
Click to collapse
Well the solution here is obvious

jauffRINDIR said:
Well the solution here is obvious
Click to expand...
Click to collapse
I went out to do some Boxing Day shopping in the morning and used the phone quite a lot. Came back with 48% battery about 2 hours ago, haven't used the phone since and it still has 48% battery lol.

X-Ter said:
The battery seems to drain ridiculously fast when you're using the device.
Click to expand...
Click to collapse
Your not supposed to use it, just keep it in your pocket.

Its probably down to bad battery calibration. This is a lot less to do with 'conditioning' the battery - which you don't need on Lithium based batteries - and more to do with Android understanding what level is 100%, 99%, 98% 50% and 0% etc.
Until you've been through a few real cycles from full to empty, the % is pretty inaccurate. Most people recharge at around 20 to 40% just because a charger is near by or its bed time, and that usually results in the levels being even more inaccurate at the higher end.
For example my battery will drop from 100% to 70% very quickly, the next 30% even slower and the last 40% seems to last forever :/
If you're rooted wipe your battery stats, do a full charge and let it drain to 0. The type of usage probably isn't that important, so play a game for 4 hours if you want . If you're not rooted, doing the same will still help make it more accurate, but of course previous usage will mess with those results.
---------- Post added at 04:05 PM ---------- Previous post was at 04:02 PM ----------
EDIT: In fact try this.. turn off the screen timeout temporarily, and leave it on the web page. Check the % every 5 minutes and keep a note of them. You should see that its not 3% over 5 minutes once you get past the first 10 to 20% of the battery.

Here is my overnight battery drain test. My phone was idle the whole time. Only on 2G mode and no wifi, no gps and no bluetooth.
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Try uninstalling Facebook for Android app and also Sign into Latitude, select Do Not Report My Location, and then sign out of Latitude.

Smokeey said:
If your on LTE that's your problem. Try to use wifi as much as possible.
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
Should have mentioned that its a GSM model.
Sent from my Galaxy Nexus using xda premium

Silly GSM users commenting on LTE device. tsk tsk... they just don't understand the immense power + battery drain of LTE.
LTE drains battery much much faster then GSM/3G. That's how it is on ALL LTE phones & the fact that the GN also has the biggest screen helps rape the battery. Sadly, what you are experiencing is normal for LTE. Im on my 2nd Nexus & calibrated both of the ones i had. Same exact issue as you and regardless of what apps/settings you adjust/disable, it's not going to help with battery much at all unless you turn off "mobile data"/LTE(or go into airplane mode).
When i have LTE on and am actually using the phone it seems like it's going through 1% battery every 1-2 minutes.... yet if i turn "mobile data" off it goes through 1% every 8 - 10 minutes instead. oh and all you weirdo "look how long my battery lasted NOT using my phone!" freaks... if i activate "airplane mode" & turn off the screen the battery will last 2 days. wee!!.. (why even have a phone lol)

voxigenboy said:
Silly GSM users commenting on LTE device. tsk tsk... they just don't understand the immense power + battery drain of LTE.
LTE drains battery much much faster then GSM/3G. That's how it is on ALL LTE phones & the fact that the GN also has the biggest screen helps rape the battery. Sadly, what you are experiencing is normal for LTE. Im on my 2nd Nexus & calibrated both of the ones i had. Same exact issue as you and regardless of what apps/settings you adjust/disable, it's not going to help with battery much at all unless you turn off "mobile data"/LTE(or go into airplane mode).
When i have LTE on and am actually using the phone it seems like it's going through 1% battery every 1-2 minutes.... yet if i turn "mobile data" off it goes through 1% every 8 - 10 minutes instead. oh and all you weirdo "look how long my battery lasted NOT using my phone!" freaks... if i activate "airplane mode" & turn off the screen the battery will last 2 days. wee!!.. (why even have a phone lol)
Click to expand...
Click to collapse
I had both the LTE and GSM models. While both are terrible on battery, they lasted about the same. I did have the extended battery in the LTE, so I take that in consideration when saying they lasted about the same. No huge difference on the LTE.

Have you managed to get over a day of battery life?

The phone is great but the battery really bothers me.
If I use my phone a bit it doesn't get me through the day. Sometimes i get as low as 8 hours of use with tops of 20 or so hours.
How do you manage it?

Fking1 said:
The phone is great but the battery really bothers me.
If I use my phone a bit it doesn't get me through the day. Sometimes i get as low as 8 hours of use with tops of 20 or so hours.
How do you manage it?
Click to expand...
Click to collapse
I use an Apex kernel and a 2000mah extended battery

Mines been great. Yesterday I was at 17+hrs which included over 3hrs of screen time and 1 hr of voice calls. I've only had my phone for less than a week, and have twice gotten over 4hrs of onscreen time (all with stock battery).
Running AOKP Milestone2 ROM with stock kernel.

I about a day and a half nearly 2 with stock and moderate use.
Batteries pretty damn good, you must have something installed that's eating it up. There's a good battery guide somewhere on these forums, usually helps track down the cause.

I usually get about 3 hours of screen time before I need to recharge. That should be normal.
Sent from my Galaxy Nexus

AOKP + Franco kernel + 2000 mAh

Got two days of battery life just now (1 day 20 hours, to be exact). That's with 2h18m of screen time and 4h2m of voice calls. Screen time is mostly due to text messaging, Facebook, Foursquare, Twitter and Google Currents, so I guess... light to moderate usage?
WiFi is always on, Data is off, Sync is on (except for FB sync), location services off. Didn't sign out of Talk, but did sign out of Latitude.
Also, since I installed Facebook, when you run it for the first time, it downloads a lot of background data, regardless of sync settings. I let it do its thing while it's still charging, and it was all good after that.
Using AOKP b20, Franco 13.1, and stock battery.

36 hours is the most I've gotten out of the phone, but I did screenshot this not too long ago.
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I never get more than a day, but i use my phone very much because studying without my gnex is boring. I have the original gsm battery.

Fking1 said:
The phone is great but the battery really bothers me.
If I use my phone a bit it doesn't get me through the day. Sometimes i get as low as 8 hours of use with tops of 20 or so hours.
How do you manage it?
Click to expand...
Click to collapse
I would say the stock battery is borderline adequate. I find that on the stock system, if I use the screen for more than 3hrs, and have all my services sync'd, bluetooth, a few calls once in a while... I would have a hard time struggling to get to the end of the day without the phone giving me a battery warning.
How I've managed it is to get the samsung 2000mah extended battery. It's not a dramatic difference, but enough to make it noticable.
As well, I've kept the screen to about 40%, used a dark wall paper, loaded franco kernal and tweaked some of the settings to be more battery efficient.
Overall, I think it's acceptable right now. At least for how I use it.
I also find that my battery drains quite a bit where I work as the cell signal is on the borderline between no signal and 1-2 bars. That's why I keep a charger at work as well as in my car to give it some extra juice.

I find the battery is actually quite good.
I upgraded from a blackberry tour, and with similar moderate use the nexus actually gets me more battery use. However both phones being idle the blackberry lasted for days.
Overall i'm never away from a power source i can charge my phone, so as long as it lasts me roughly 1 day i'm good

Stock battery
Rom: aosp self-built from aosp master branch
Kernel: at the time, franco's nightly #8 or #11, can't remember exactly
Usage: light (3h screen on)
Went almost 3 days on one charge.

Nerfsuperball said:
I find the battery is actually quite good.
I upgraded from a blackberry tour, and with similar moderate use the nexus actually gets me more battery use. However both phones being idle the blackberry lasted for days.
Click to expand...
Click to collapse
If you can't get days while idle with your GN, then something is definitely wrong.

vapotrini said:
If you can't get days while idle with your GN, then something is definitely wrong.
Click to expand...
Click to collapse
Honestly I can't say I've let my gn be idle for days. Its far more useful then my bb was.
Sent from my Galaxy Nexus using XDA App

I don't have a nexus yet but would like to know if switching to 3g only improves the battery length significantly?
Sent from my R800x using Tapatalk

two days. Medium use.
Sent from my Galaxy Nexus using xda premium

I got my nexus 4 days ago.. Since then im harassing my phone.. Literally.. Im constantly installing application, customizing the homepages, making icons, widgets etc, surfing on web, exploring the market. 100% of time, Wifi or mobile data is in use (although i got unlimited data plan here (with speed of 4 mbits and 1 mbit upload), my wifi is more faster than mobile data.).
So i havent had a day with "normal" or "moderate" use on my GN.. And, battery lasts for over 24 hours.. And, autosync is always on, brightness is on 40% aprox, screen sleep 45 seconds (basicly its not sleeping cause im harassing it all the time )
Im all stock to the bone, just unlocked bootloader and rooted..
Im wondering what will happend when i start using my phone with moderate usage ..

Hmmm there are some interesting answers on this thread. The battery and the low sound have been the sole disappointments for me on the GN.
I get about 3.5 hours screen time before i have to recharge.
I guess if i turned everything off i could get better performance battery wise. But why would i spend almost $300 on a phone only to not use it? I am complete stock at the moment because i don't want to void the warranty but while i waiting for 4.0.3 i will be regularly using the hell out of my phone with a spare stock battery.

batteries have yet to perform at the level of the rest of the hardware, it's a fact. bear with it like the rest of us. of course we bought the phone to use it.
if you need battery life above all, turn off sync, it will do wonders.
personal pref: for more available resources, uninstall that widget crap, homescreens full of that i dont know whats the point of using them, even multiple homescreens, i rather have really important stuff on the launcher and just one homescren, black bg, no widgets. these are cpu and memory hogs, as well as 3rd party task killers, system monitors... keep it simple. less is more.

I assume no more than a day on my gn, but, as stupid as it sounds if you turn off the 3g and only enable 2g you improve your juice a lot. Most of the time we only need 2g.

[Q] Pathetic Battery Life, even with 3800mah extended battery. WTF?!?

This is irritating me immensely...my Galaxy Nexus has yet to last me a full day on a charge. I bought a Hyperion 3800mah battery and I believe it really did extend my battery life. On Sunday, I was home all day and my phone was connected to wifi. I used it quite a bit and the thing had 80% when I went to bed.
Today and yesterday, going to school, my phone is just about dead when I get home, at 2:30. I did use my phone, but not heavy at all. Spent the most of the day in my pocket. I had nothing on both days. No bluetooth, GPS, I had sync off when I went to school today, then I turned it on around 1 o clock or so. I used full screen brightness when I was outside for a few minutes, otherwise it was on low. The thing is warm to the touch like its been running frantically. I'm lead to believe that its something to do with the LTE radio. But what??
Took some screen shots of my battery page, had 4% left.
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Please please please help me. I've read people getting 2 days on a charge with a 3800mah battery...I'm drooling for that ability.
Thanks!

It looks like your spending lots of time in area's with bad reception. I'm using the sedio 3800mah and I have no problem going several days on one charge. Only time it drops faster is when I have crappy reception and the radio's are pulling more juice. On heavy days I have wireless tether running all day, and a couple hours of games and still have 40+ percent at the end of the day.

there is also some crap app installed that keep ur phone awake..
ur phone should be awake only when the screen is on (or so)..

your high % of cell standby should give it away.

look at your signal the red is all the times with no signal meaning that whole time the phone is searching for signal. plus 49 %of screen on time that looks to be half of 7:49 so almost 4 hours of scren time is good just need to fix your signal problem plus draw something kills your battery as well

lordgodgeneral said:
It looks like your spending lots of time in area's with bad reception. I'm using the sedio 3800mah and I have no problem going several days on one charge. Only time it drops faster is when I have crappy reception and the radio's are pulling more juice. On heavy days I have wireless tether running all day, and a couple hours of games and still have 40+ percent at the end of the day.
Click to expand...
Click to collapse
+1 to signal causing drain
Sent from my ADR6425LVW using XDA

dco717 said:
plus 49 %of screen on time that looks to be half of 7:49 so almost 4 hours of scren time
Click to expand...
Click to collapse
is not like that..49 % is the power consumption of the screen in relation to the other things that drained the battery..with easy word, you cant know the screen on time if he doesn't say u

True...well he needs to do a factory reset and see if it helps
Sent from my Galaxy Nexus using XDA

Wow, poor to no reception, high awake times, high screen on times...it's a miracle your battery lasted as long as it did.

dco717 said:
True...well he needs to do a factory reset and see if it helps
Sent from my Galaxy Nexus using XDA
Click to expand...
Click to collapse
Factory reset doesn't help bad signal...lol.
Turn off LTE, bad signal will drain you fast but bad signal on LTE will drain you twice as fast.

Looks like you have a rogue app. See how much your phone is awake when the screen is off? That combined with bad signal=dead phone.

I see what you guys mean about awake mode. Yea my phone feels like a warm coal all day. I uninstalled "Words Free" because I've heard bad thing about battery, I stopped using the beautiful widgets weather app, stopped sync with soundcloud, and I got an airplane mode widget for the bad reception area. We'll see how long I can stretch my battery tomorrow.
I read up on how Light Flow light might drain the battery. The LED light has remained stuck on a lot, so I uninstalled it. I'll post a battery stat tomorrow night. Fingers crossed.

I can vouch for bad reception draining the battery.. that should clear up your problem.
Sent from my Galaxy Nexus using xda premium

I had the same problem but get this app called "2X Battery", my batter lasts the whole day now! Get the PRO version, its actually worth it and it works wonders!
I have the extended battery also

yep bad reception... once time i left my phone one in my bag while on an airplane... not in airplane mode or anything... battery went dead in about 2 hours due to no signal

Pretty sure the bigger problem is the phone waking up while the screen is off. You should run your phone for another day and look at the list of apps that are draining your battery.
A few good things to look for? Google + or other programs constantly checking for messages your location, or updates, e-mail being pushed to your phone automatically, Wifi on while in sleep, and widgets.

My battery is **** also on GSM version my galaxy s2 would have 2-3% drain per hour most time less Nexus seems to drain 2-3% in 15mins its terrible wish i never changed.

how is my battery life?

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I don't know how to read this. I'm new to rooting

With only 2hrs screen on, not really... I usually do twice that.
Sent from my SGH-T999 using xda premium

DinoSoup said:
With only 2hrs screen on, not really... I usually do twice that.
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
not really what?
is the battery life good or bad?
im running cm10

track 1 said:
not really what?
is the battery life good or bad?
im running cm10
Click to expand...
Click to collapse
I'd say your battery life is pretty poor.

My battery is a little bit better. I don't have any screen shots right now, but it's usually around 3 - 3.5 hours on screen. Around 7-8 hours battery usage total.

what app keeping your phone to stay awake?? 'cause that one hella awake phone.

x1tyme said:
what app keeping your phone to stay awake?? 'cause that one hella awake phone.
Click to expand...
Click to collapse
i dont know....i dont use a lot of apps. i use my phone quite a lot during the day though.

track 1 said:
i dont know....i dont use a lot of apps. i use my phone quite a lot during the day though.
Click to expand...
Click to collapse
Try downloading Gsam or watchdog from the playstore. Watchdog will tell you if there's a rogue app draining your battery and Gsam will tell you what's taking up the most power.

let your phone do a 3-4 recharge discharge cycles..then it would stabilize.

zeushvk said:
let your phone do a 3-4 recharge discharge cycles..then it would stabilize.
Click to expand...
Click to collapse
what is a recharge discharge?

charge it to 100% then let it discharge(1 cycle of rechrge of discharge) although there maybe a better word to represent that(noob in complex english )..

track 1 said:
i dont know....i dont use a lot of apps. i use my phone quite a lot during the day though.
Click to expand...
Click to collapse
With 2 hours screen on time over an 8 hour period and your steady curve on that graph, I would say you have some app, or some service eating CPU cycles constantly (these are called wake locks)...
Do this:
Download an app called CPU spy
Charge your device all the way
Pull it off charger
Open CPU spy
Then just hit the back button to close it.
Let your device sit for about a half hour. Don't touch it as much as possible. Leave the screen off.
Open CPU spy... post a picture of what your CPU stats say according to that app. Majority of your times should be in deep sleep mode.
Also, your battery shouldn't drain anymore than 1 to 1.5% each hour at idle. Unless you live in an area where there is poor reception (scanning for signal chews it up as well).
EDIT** ALSO...is your screen brightness on auto or is it manually adjusted a little brighter? If it on auto, then your battery life according to those graphs is absolutely awful. I have mine set pretty bright and I still see about 3 hours of screen on time

Give it a few hours of "normal" use and then come back here with a Betterbatterystats screen shot with Partial Wakelocks/Since Unplugged and Processes/Since Unplugged. That way we can see what is eating your battery. With only 4% gone, we can't see anything (too small of a window). Make sure you don't plug it in and use normally.
I have seen your other posts and I am wondering what it is that you really want out of your battery. If you think that you can get 3-4 days out of a charge, that is not going to happen. 1.5-2 days is a reasonable expectation and I think that you can get that, but you have to look at your usage habits. No kernel is going to fix that. No ROM is either.
If you are polling notifications (Facebook, G+. Twitter) or Google Locations (Maps, some app that requires location) or believe it or not using the XDA/Tapatalk app a bunch, then those will drain your battery quite fast. I use the Tapatalk app quite a bit and that and Google Now are my #1/2 battery drainers. Could I get rid of Google Now? Sure. It is more of a novelty at this point. I still get 1 -2 days of charge on my phone wihtout worrying about where a plug is.
Like I said, come back at the end of the day or tomorrow morning and post the Partial Wakelocks/Since Unplugged and Processes/Since Unplugged and we'll see what is draining your battery.

Another thing to note is that it seems your mobile network is typically pretty patchy. This can really drain your battery too.
I've been chasing wakelocks since I got my device and think I'm at a pretty good place. I get 2.5-3hrs of screen on time (about 20% screen brightness) across about 25hrs of standby time. Does anyone else get a lot of mmc1_detect and mmc0_detect wakelocks?

thanks woodrube. I will post my stats at the end of the day. I don't have a facebook or google + or any app that have notifications or updates by itself. I have the screen set to 20% brightness

how do I delete that dmux wake lock?