yashsingh1/xdaforums huggingface dataset:
[Nexus S General] leyvatron:
Just because you listen to music and text doesn't mean your email, twitter, facebook, weather, news, etc... etc..etc... aren't refreshing every 15 minutes. Check ALL of your apps refresh settings. Make sure the email isn't trying to send over and over and over... I had this happen. It gets in a loop of sending and just stays in my outbox.

Edit: It also looks like your Yahoo email is running in the background.
[Nexus S General] mishkasf:
The only refresh setting I found was in the Facebook app, it was set to 2hrs, so I set it to "never". I have a GMail and Y! Mail apps installed and those are 'push' clients, and that's why I like them -- if I have to tell it to never refresh, then what's the point of having a smartphone??? Might as well wait till you're near a PC and check the stuff then :)
[Nexus S General] leyvatron:
and push is constantly refreshing.

Just set it to every time you go in Yahoo it refreshes.

I don't use Yahoo mail because it drained my battery too. you can use the stock email app and set it to refresh every hour, thats what I use.
[Nexus S General] mishkasf:
what about Gmail app?
[Nexus S General] leyvatron:
Gmail also syncs constantly....Make sure your sync isn't always on.. turn it on when u want to check your email... and turn it off when you are done.
[Nexus S General] mishkasf:
Darn... but the whole beauty of a smartphone to me is that it will let me know when I have a new email... It can't be using *that* much juice to sync up email, can it? How does the iPhone manage to do it?
[Nexus S General] ryan562:
x2 i can go for two full days if i wanted to with mines
[Nexus S General] mishkasf:
Are you making any calls? Using GMaps? Using Internet? If I don't use the thing, it'll standby for a day or two as well, but as soon as I start using it, it dies pretty quickly
[Nexus S General] leyvatron:
I have used 14 hours on my phone and it is still at 41%.

Voice 22%

Dispay 20%

Music 13% - over 30min used under 45min.

Android System 11%

MediaServer 8%

Cell Standby 7%

Android OS 5%

TiKL 4%

Phone idle 3%

XDA 3%

Dialer 2%
[Nexus S General] zorak950:
There's a difference between apps that use push notifications and apps that ping the network for updates. An app that relies on pinging the network is going to run in the background, and periodically check the server for updates. This drains power. Apps that make use of push notifications rely on the server to notify them when there is an update. A well-designed push notification system will use almost no power, because the app itself doesn't do anything at all, and no network queries are required. Thus, the app doesn't waste resources and battery constantly looking for new messages/mail/whatever when there aren't any.
[Nexus S General] mishkasf:
This is telling me that something is not right with either my phone or my battery... I have an almost similar usage pattern (from the photo attached earlier on), yet after <3hrs I lost over half of my battery... Would you agree?
[Nexus S General] kenvan19:
I have to agree with the poster who said this phone has the best battery of the android phones I've owned (mytouch, epic and evo). What a company says about battery life and how it actually performs are two different things. With a custom rom, file system and kernel I could get max 28 hours on my epic. On the evo if I got on xda for five minutes I'd lose between 5&7%. I've been flashing roms like crazy all day today and I'm still over 30%. This phone is awesome.

Sent from my Nexus S
[Nexus S General] rashad1:
My first Nexus S had poor battery life, drained about 10% per hour, with barely any useage. I could be because of the fact that I didn't let the battery die when I first got the phone. I exchanged the phone and let the battery die and what not, and I got 16 hours of use on the first cycle. It ranged from 14 hours to 23 hours ever since.
[Nexus S General] zorak950:
The whole "full discharge" thing is a holdover from nickel-based batteries. Lithium-based batteries don't have the same physical properties and don't require that they are drained in order to take a full charge over time. Draining them doesn't do any major harm, but it's not necessary nor is it a part of routine maintenance to keep them running efficiently as it was for nickel batteries. There are still a lot of people who don't know the difference, though, (including the guys at Best Buy who sold me my Nexus S) and who will tell you to drain them. In reality, it doesn't make any difference. Of course, the performance of any rechargeable battery will decline with time and use, so if you keep your phone long enough, you'll need to replace the battery eventually no matter what.
[Nexus S General] zorak950:
Yeah, cell standby can murder your battery if it's having trouble keeping connected, like if you're going in and out of range a lot or live/work/hang out at a location where reception is poor. Some phones (never tried this with my Nexus S) will eat their batteries just searching for a network if you leave them on when you're out of range. Different phones seem to react differently to those various situations, but you'll see a marked decline in battery life to some extent pretty much no matter what phone you use if you keep it on and not in Airplane Mode when you're in a place where you get less than a couple bars for a significant period of time.
[Nexus S General] baolongn:
You might have an app running crazy in the background. Have you tired enabling USB debugging? Get watchdog and put options to show phone processes and put the threshold low to see what uses ur CPU. My android os sits at 4% after 14 hrs of medium usage.
[Nexus S General] predation:
I'm with OP.

switching out my phone tomorrow.

Battery life on my particular unit is horrendous.

after unplug from full charge and 10-20 min of light use, i get down into the 80's.

i'm pretty good about stuff running in the back round too.

we'll see how the next unit works out. :mad:
[Nexus S General] mishkasf:
That's EXACTLY what is happening with me!
[Nexus S General] rocketragz:
guess i got lucky because my ns battery life is outstanding. coming from a vibrant i'd buy the ns just for the battery life improvement.
[Nexus S General] KidCold:
hmmm i guess i should turn it on airplane mode then >.> kinda sucks really

it ate like 30% of my battery in about 1 and a half hours. And during this time i didnt even use it :p
[Nexus S General] RogerPodacter:
the reason for poor battery life on most all android phones is because the OS keeps an always on data session no matter what. other OS's like symbian (and i believe iOS) only open the data session when you actually do something that needs data, i.e. open the web browser and the data session turns on.

so as a test i turned off mobile data one day, and sure enough after 8 hours, with 1 full hour of screen-on time, my battery was still at 80%.

of course we dont all want to turn off our data connections, so you can eithe ruse juice defender, which does this automatically, and at intervals will turn on data, do all the checking, then turn it off. or just do what i do, for days when i know i need it to last, i turn off my data, and turn it on once in a while for example on a break, all my email and stuff comes in, then turn it off. just keep manually turning it on/off as you need it.

that is only in extreme cases. i understand we want the advantage of these super phones. after an 8 hour work day my battery is around 20%. the iphone i dont believe handles the always-on data connection like android does, unless its set up for push mail as well etc. but in general, i dont think so.

google wants this "always connected" idea of a phone. for example if you press the search button and speak voice your search, the result must go to google's servers to interpretate, etc. they want the data session to always be on hand ready to go, and that's my opinion why android just drains so quickly.

you can try the test yourself. i was shocked how long my phone lasted. it could go for 2 days easy with that usage method. but we have to take the trade off of having an always connected device for the poor battery life.
[Nexus S General] predation:
so an update.

i haven't exchanged my unit yet.

today i've unplugged my phone at 7am ish.

20 min ride to work with pandora.....

didn't realize i had 2g on until like an hour/1.5 hr ago (flipped 3g on).

listened to pandora again for about 20 min.

4h 11m 21s shows:

27% display

24% pandora

13% media server

9% kik

7% wifi

6% cell standby

4%voice calls

battery @ 72%

11am now.

seems to be better.

when i had posted about my "horrendous" battery life.

i had posted it after i had gotten back from NY.

so i believe my bad battery life is due to GPS (not being able to lock--damn ny city) and moving in and out of the subway (cell standby).

i'm going to keep an eye on it and see how it goes.

i still think i will exchange because the damn screen is soo bright (even at low settings--is this normal?))
[Nexus S General] distortedloop:
I don't know why, but all my Android phones use massive amount of juice if I listen to music...anywhere between 5-10% per hour.

Your percentage hit seems a bit too much for your activity, but I've got no specific ideas to check that haven't been mentioned in this and other threads already.

I will add that I also think the Nexus S has the most amazing battery life out of the box of any Android I've owned. Seems to be not as good the last couple of days as it was the first four weeks, but I can still easily make it through a full 18 hour day with much heavier usage than you're reporting.

Are you rooted? Did you try wiping batterystats.bin file?
[Nexus S General] predation:
distorted, you referring to me or OP???

i'm stock rom and non rooted.

also, i wanted to add....

maybe someone can answer this.

sometimes my phone says 100% or "charged"

what is the difference between the two?
[Nexus S General] mishkasf:
Battery life culprit???

So, after installing Watchdog, it's been pestering me with the alert that some 'init: Linux Process' has been taking between 60% and 99% of my CPU, as you can see in the photo below

Restarting the phone seems to only temporarily solve the issue. The only thing I can find about Linux Init is off of the Wikipedia entry for Linux.

What is going on? Is anyone lese experiencing this?
[Nexus S General] hah2110:
Hmmm... Dialer usage

I'm confused. So I just installed CM7 nightly and I'm doing some testing on what causes bad battery life. I am on my second stage so last night I left the phone unplugged after being fully charged (~97% or whatever it is). This morning, roughly 9 hours later, I was at 89% (not bad) and hadn't used the phone. For some reason, Dialer was at the top of my Battery Use at 47% BUT the stats inside it registered at 0 for everything (confirming no usage). What gives? I don't get it.
[Nexus S General] hah2110:
May have found the fix:

http://android.modaco.com/content/zte-blade-blade-modaco-com/328933/battery-consumption-and-dialer/

Testing
[Nexus S General] ykphuah:
Juice defender claimed that they cannot control mobile data on gingerbread yet.
[Nexus S General] NAZology:
Haven't read this entire thread but all I can say is that mine has been completely inconsistent. Observation from today. Plugged it in sat down to watch football and didn't even use the phone. I was at 20% in 3 hours flat. The thing just drained.

The battery and phone were also very very hot at the time, 3 hours and drained seems crazy.
[Nexus S General] hah2110:
Ok I didn't have that setting on. Any ideas?
[Nexus S General] RogerPodacter:
i bet you had wifi on for those 9 hours, no? if it had been on 3g data then it may have drained much more. wifi is infinitely better for sure! curious to hear...
[Nexus S General] knytphal:
Leaving wifi on is definitely the way to go, especially if you're normally in a wifi zone. For the past few weeks I have never even turned wifi off and I regularly get 15+ hours of battery life from my device, with over 3-3.5 hours of display on time. Even when I do plug it in for the night I usually still have about 30 percent of my battery left.

My Nexus S has some stellar battery life.
[Nexus S General] kenvan19:
My wife experienced a very strange battery related issue today that I, for the life of me, have not been able to come up with a reasonable response for:

So she plugged it in last night before we went to bed and then she woke up and used it (plugged in) for a few minutes and it said it was fully charged (Circle Battery Widget read 100%) then she unplugged it. Now, I am more than aware of the issue of losing up to 10% when taken off the charger, but her phone IMMEDIATELY dropped to 48%. I was later able to get her phone to charge up to 70% before we had to go somewhere but since it hasn't drained excessively. It was on wifi all night. The display used 41% of the battery and cell standby was at 38% (we have terrible service in our bedroom, not surprising).

She's running CM7 stock kernel and has been for a few days and this hasn't happened before. I'm just baffled.
[Nexus S General] ykphuah:
Hmm, it sucks a bit to not be able to use latitude! It was running quite well on my previous htc magic without sucking battery big time. Anyone that managed to fix it and run latitude at the same time? I am thinking of removing the 5.0.0 altogether since I have bruts anyway.

Or is there any automatic ways to login/logout latittude like every hour?
[Nexus S General] onthecouchagain:
Is "Voice Dialer" the same as Google Voice? I see that all the time in my cached list.
[Nexus S General] distortedloop:
Take a look at the app called Tasker. Seems to be the best/most flexible, but there are similar ones out there.
[Nexus S General] knytphal:
No, "Voice Dialer" can be used to control the phone with voice commands (send texts, open apps, etc). "Google Voice" is google's universal phone number...more or less.
[Nexus S General] RogerPodacter:
these weird reports are so much sounding like issues with voltage drops and whatnot. no way should anything drop from 100% to 48%, but just saying, something aint right and it seems to be related to that.

today i unplugged my phone, and it stayed at 100% until 15 minutes when it went to 99%. just like normal for the last year. so i dunno....
[Nexus S General] kenvan19:
See, I'm aware of the issue of the drop but I rarely experience it with more than a 1 or 2% drop. I can find no reason why the phone would drop from 100% to 48% literally on unplug. I ran her phone down to 5% last night and then used a different charger and when she unplugged it, it stayed at 100%. I'm hoping it was a faulty charger (though the same charger had been used for a few days and that had never happened). I'm still completely baffled. I can't remember the exact voltage her phone was at but I do remember it was somewhere around 3100mV (I think..?) when I checked after her phone dropped like that whereas mine at 91% is currently reading 4050mV.
[Nexus S General] RogerPodacter:
looking at the nexus s batt driver, shut down voltage is 3.4029 volts, and full is 4.176 volts.

the only thing i can think is some temporary glitch happened that stopped the phone from charging while still connected, so the phone "thought" it was full charge and never removed from the plug, but really it had been dropping for all those hours down to 48%. soon as it was unplugged the percent corrected itself.

that makes no sense though and i dont see how it could even happen.
[Nexus S General] kenvan19:
That's the thing I keep coming back to...what could possibly cause it?! So I 'calibrated' her battery (I'm aware that you can't calibrate a LiPo battery and of course mean that I just made sure it was at full charge then reset battery stats) and I'll have to see what sort of performance/charging she gets over the next few days.
[Nexus S General] jlevy73:
My numbers make no sense but here they are:

100% = 4121mv

Took the charger off and got:

96% = 4175mv

Crazy
[Nexus S General] sinatosk:
I have similar results... I remember someone saying something about a volt table... have a search on the xda... it's a basic explanation to as why this is happening
[Nexus S General] RogerPodacter:
yeah that voltage INCREASE just has me completely scratching my head.

however i did find something in the driver history, i think this is the problem. check it out:

http://android.git.kernel.org/?p=ke...it;h=f7ba01b3b0c31750ab0cf5516d6914be52060144

seems like the percent is being reported as 100 when the full charge flag is set. but that is not necessarily meaning it was totally full, because if you look at this table from the driver, it could be "full" but not at max voltage:

so if it hits 4.1 volts while charging, BATT_FULL becomes true. at line 194 is the exact place:

if (chg->bat_info.batt_is_full)
val->intval = 100;

http://android.git.kernel.org/?p=ke...b7538ce298e3b4a0f3e73b58784e503720139;hb=HEAD

someone needs to comment out that line 194, compile, and see what happens. i bet that is what is going on here.
[Nexus S General] RogerPodacter:
really weird. i think it all is related to that change i linked above. very strange.

however there is a "recharge volt" condition somewhere in that code, i think it's 4.1. so perhaps when you plug in at night, it charges to full, then slowly drops till it triggers the recharge, and tops off again back up. and depending on when unplugged could be in the middle of that cycle.

still doesnt explain why volt went up when unplugged. unless it is just random regular variations. my voltage often bounces up and down from min to min under load. its just the nature of batteries.
[Nexus S General] jlevy73:
That makes logical sense since I did have it charged overnight. And the 4.175 reading I got is closer to the theoretical max than the 4.121. Interesting stuff
[Nexus S General] ykphuah:
Hmm, I have signed out of Google Latitude, but Google Maps still tops my Battery Usage chart!
[Nexus S General] rhca50:
I've turned off my gps, but am still logged in to latitude... I'm going to run like that for a day or so to see what happens with the maps battery usage.
[Nexus S General] jlevy73:
Getting the same behavior again where charge is defined as anywhere between 4.1 and 4.176. It was at 4.125 at 100% and 4.175 @ 95% when the charger was removed. Unlike the Nexus One though, the NS won't die until it approaches 0%. Last night for example it powered down at 2%.
[Nexus S General] kenvan19:
That's interesting, I like to get my phones low before charging them just out of old habit and last night I got the NS down to 1% before I noticed how low I was and popped it on the charger. I didn't think to check the voltage because I was exhausted so fail me.
[Nexus S General] SooSpecial:
As mentioned earlier in this thread. Turning off background data boosts your battery life, a lot. But that's not what we all bought the NS for right?

There seems to be a bug with Exchange account. I've set mine to check every 15 mins instead of Push and still the emails are pushed instantely to the phone.

I deleted the exchange account and now the battery life is much better.

Looks like I'll be back to the iPhone soon. The battery of the Nexus S is a deal breaker for me. Especially the forever charging time.
[Nexus S General] flameinthefire:
Brand new nexus s battery drains ..

I bought brand new nexus s. ive heard that the battery life is really good on this phone. i loose like 7 to 9 percent in an hour just sitting there nothing doing anything on the phone... :(. is it my phone? should i go replace it?
[Nexus S General] RogerPodacter:
That's in the ballpark of normal for android, maybe a little high. It's all the data services going on in the background like gmail, market, talk, etc. As a test turn off mobile data for 1 hour and see the difference. If yes then at least you narrow it down a bit.
[Nexus S General] flameinthefire:
i tried that still no difference
[Nexus S General] brmayhem:
Settings>Applications>Battery use

Check it out. Maybe you have an out of control app sucking all of your battery juice.
[Nexus S General] Jonathon Grigg:
I have recently noticed that at night, when my Tasker battery saving profile is working, Maps is the second highest battery user (about 22%, just behind screen at 25%). The thing is, I rarely open Maps, and I didn't at all yesterday, but it's still using battery. The process isn't running AFAIK, so why would it be using battery?

Does Maps serve as like the location service or something? Anyone have any ideas? It doesn't really bother me, battery life is fine, but I'm just curious :confused:
[Nexus S General] ykphuah:
I realized this, when I sign in of Latitude, Maps will be the top 2 battery sucker. No matter I use ATK to kill it every hour, it still starts off and suck the battery. Once i signed out of latitude everything is fine back. This sucks as I don't experience this in my previous 2.2/2.1 phone.
[Nexus S General] Jonathon Grigg:
I don't know if I have ever even opened Latitude :confused: I will see however, maybe that will work. I don't even have any use for it, so maybe I should remove it all together...
[Nexus S General] robstunner:
Give it a week. battery life sill improve. 7-9% perhour is not normal for me, not even in bad reception.
[Nexus S General] Exlipse:
Yea, I would check the battery usage under 'about phone'. When I got my nexus s fired up the 2nd day i was having major battery issues, I checked into it and G voice was using 70%!! My battery literally drained in under 3 hrs.. turns out t-mobile screwed up my data plan and it wasn't activated, so G voice was on a loop req data and getting denied.. anyhow got it fixed and now running smooth :D

_____________

Nexus S:___________Nexus 1:

Bionix 1.2___________stolen..__:mad:

Trinity 13 v2.1.4

CWM 3.0.0.5
[Nexus S General] flameinthefire:
does it really get better? whats you avg day like?
[Nexus S General] jlevy73:
Download watchdog from the market. This app will monitor all your apps and help determine which apps you have that are rogue. Not only does it monitor apps but also system processes.
[Nexus S General] Bry5on:
My battery life was awful for the first few days that I had mine, I actually went back to Best Buy to return it as it couldn't make it through a half day. Charging was also painfully slow. They recommended that I give it a day or two as there have been similar troubles. Three weeks later, I'm proud to report that I can make it almost two full days without a recharge with light/medium use.

Give it a week and see if that does it..
[Nexus S General] blacktangodown:
Moderate User Battery Stats.

I don't have an picture of my battery use stats but I just wanted to share my experience with the Nexus S battery life.

With 3G and Background data on: average about 16-18 (highest 22) hours.

With 2G and Background data on: average about 24-32 (highest 36)hours.

Battery life is easier to preserve with the Nexus S if you are willing to turn features off when not in use. I usually turn my 2G and Background data off during work because it just isn't necessary in my field of work. Once I'm off I turn my 3G on and the other features on.

From my observations, the background data kills a lot of juice. Note: I've tried 3G on and Background data off and there is a significant improvement on longevity of a charge.

Average daily use my phone for: moderate texting (50), 2 hours of talktime,30 minutes of internet browsing, check email 2-3 times a day, moderate app use.
[Nexus S General] MO3iusONE:
I also hope it improves. my phone berarly last a work shift.. 8hrs.. I really need to get an extended batter or something.
[Nexus S General] shrivelfig:
When you first get the phone, charge it completely. Then use the phone normally until the battery drops to 10%-20%. This is just to calibrate the battery meter. Charge and use the phone normally for a week to let the battery settle in properly.

When you take the phone off the charger, it's normal that it immediately drops to 95%.

Whatever you do, don't use any task killers.
[Nexus S General] moon-unit:
I agree that to start with the battery seems to drain pretty quick, however after a few weeks I can go two days easy on one charge with light/medium use.

I took it off charge yesterday morning and at 7pm I was still at 71%.