Develop Bugs

[Q] Battery life/kernel question

I am currently using CM7 RC4 and have been reading through the CM forum for tips on how to improve my battery life. I must admit that I have tried various kernels (CFS and BFS as well as SBC and non) but nothing seems to really make a difference.
I average about 6 to 8 hours of battery life with light to moderate use. The most time I spend really using the phone is for the 2+ hours when I go to the gym and use Pandora. Besides that, I send some texts, browse the web and use Facebook. I know that there are a lot of variables when it comes to interpretation over how much use of a phone is "a lot" but still.........I hate how quickly my battery drains.
In one instance, I went to bed at 1 a.m. with 99% charge (having been off the charger only 30 minutes) and when I woke up at 8:30, I was already down to 57% with high Cell Standby as well as Android System.
I have now gone through and done the change on my phone to set the radio to "CDMA Only" as well as disabling Auto Sync.
I am currently using SavageZen Kernel CFS 0.2.1 and will report back on how it does overnight but.....definitely not holding my breath.
Any helpful tips are appreciated.

BatmanCia said:
I am currently using CM7 RC4 and have been reading through the CM forum for tips on how to improve my battery life. I must admit that I have tried various kernels (CFS and BFS as well as SBC and non) but nothing seems to really make a difference.
I average about 6 to 8 hours of battery life with light to moderate use. The most time I spend really using the phone is for the 2+ hours when I go to the gym and use Pandora. Besides that, I send some texts, browse the web and use Facebook. I know that there are a lot of variables when it comes to interpretation over how much use of a phone is "a lot" but still.........I hate how quickly my battery drains.
In one instance, I went to bed at 1 a.m. with 99% charge (having been off the charger only 30 minutes) and when I woke up at 8:30, I was already down to 57% with high Cell Standby as well as Android System.
I have now gone through and done the change on my phone to set the radio to "CDMA Only" as well as disabling Auto Sync.
I am currently using SavageZen Kernel CFS 0.2.1 and will report back on how it does overnight but.....definitely not holding my breath.
Any helpful tips are appreciated.
Click to expand...
Click to collapse
First, make sure you've done this: http://forum.xda-developers.com/showthread.php?t=712990
Also, turn off your back up data to Google servers in settings > privacy.
I've had it off for a good 5 hours or so and my battery life has already drastically improved.

To be honest dude, without an extended battery man that's about the best you're going to get. I consider myself a moderate-heavy user and I work from 8am-5pm. My battery is unplugged at 7am and when I get off at 5pm its on about 20% on my way home. I've tried just about EVERY rom(aosp/sense) along with EVERY kernel combination out there. I browse web, constant text, twitter, Facebook, email, maybe a game and I've never witnessed anything greater than what I posted above. No matter what people say to you about how great their battery life is or how its been running for 18hrs its all BS(w/ reg battery). Yeah if your phone is sleeping 90% of the time then yeah its believable, but for users like us 6-8 is about the best with a normal battery. Now a buddy of mine has the sprint extended battery; dude uses the hell out of his phone and can honestly say his phone last about 17 hours of power usage.
My tip would be to invest in an extended battery if you want more than 6-8 hrs.
Sent from my PC36100 using XDA Premium App

Lol this is far from the truth. I avg 18-20 hrs with moderate use.
dirkyd3rk said:
To be honest dude, without an extended battery man that's about the best you're going to get. I consider myself a moderate-heavy user and I work from 8am-5pm. My battery is unplugged at 7am and when I get off at 5pm its on about 20% on my way home. I've tried just about EVERY rom(aosp/sense) along with EVERY kernel combination out there. I browse web, constant text, twitter, Facebook, email, maybe a game and I've never witnessed anything greater than what I posted above. No matter what people say to you about how great their battery life is or how its been running for 18hrs its all BS(w/ reg battery). Yeah if your phone is sleeping 90% of the time then yeah its believable, but for users like us 6-8 is about the best with a normal battery. Now a buddy of mine has the sprint extended battery; dude uses the hell out of his phone and can honestly say his phone last about 17 hours of power usage.
My tip would be to invest in an extended battery if you want more than 6-8 hrs.
Sent from my PC36100 using XDA Premium App
Click to expand...
Click to collapse
Sent from my HTC Evo running CM7

@swaze
Define moderate use! My screen on my evo gets turned on like every 5 or 10 mins while wifi usage sits at 40% and the screen is constantly at 50%. My phone lasts me through work with pretty moderate/heavy usage(7-9 hrs) and I'm happy with my battery simply because it's not going to get better(regular batt). Now if your display never gets passed 20% then you're not using your phone buddy.But, if you're using a REGULAR battery and you're actually getting 18 hours feel free to post pics or no one cares to hear about this make believe 18 hours. Please do share how you actually use your phone; how are you achieving such great results cause as of right now you're just one of those randoms who come in and say **** like" durrrr I get 18hrs on my phone, but I post no pics to back it up". PICS OR IT DIDN'T HAPPEN
Sent from my PC36100 using XDA Premium App

The best option I could suggest would be search E-bay for a 3500 MaH extended battery. They run about $.01 with about $9.99 shipping from China. If you need help I can send you a link to one of the auctions. Also make sure things like auto-brightness isn't enabled and that things are syncing a ridiculous amount of times per day. Good Luck.

Ive been running CM7 for a couple weeks battery life started going down hill fast.
My fix was to get new HTC battery for $7 on Ebay problem solved.

Just try turning the Google backup off.

I get from 10hrs to 15 but I turn off the day when I'm not using it and have my CPU set to run a at different speeds
Sent from my PC36100 using XDA App

Bro I bought a 3500+ battery from eBay and it lasts me about the whole day, this is with the exception with 3G on and heavy texting, moderate browsing and heavy and I mean "heavy" application use during the end of the day. On other days when I'm not texting I'm watching videos on youtube with the 4G on, this last for about 30 - 60 minutes top!. So whats my point? Say thing like you said, "My tip would be to invest in an extended battery if you want more than 6-8 hrs."
pictures Below :

Im not sure what kernels are being used that are tossing out such ruff battery life but SavagedZen-1.0.0-CFS-HAVS-WiMAX-GB-noSBC is treating me right.
Simple performance setting in CM changing governor can get the job done adding many hours of extra battery life.
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Smartass setting is great performer to say the least power packed battery saver.

Not sure if apps available but it would be nice if governor had timer settings were user could set what governor they want to run at what time automatically.
Example would be after 11pm power-save governor kicks in then returns to Smartass from 7am - 12pm etc.
If such apps available...maybe I'm missing setting in CM someone please let me know

sling said:
Not sure if apps available but it would be nice if governor had timer settings were user could set what governor they want to run at what time automatically.
Example would be after 11pm power-save governor kicks in then returns to Smartass from 7am - 12pm etc.
If apps available...maybe I'm missing such setting in CM someone please let me know
Click to expand...
Click to collapse
Closest you're going to get to that is setcpu man. It does just about everything you just mentioned. There's a donate version in the market and a free version that the dev puts up for xda users try google search you'd find it in a heartbeat.
Actually I'm feeling nice. The latest version is 2.1.1.
http://forum.xda-developers.com/showthread.php?t=505419
Sent from my PC36100 using XDA Premium App

dirkyd3rk said:
Closest you're going to get to that is setcpu man. It doesn't just about everything you just said. There's a paid version in the market an a free version that the dev puts up for xda users try Google search you'd find it in a heartbeat.
Sent from my PC36100 using XDA Premium App
Click to expand...
Click to collapse
Right on used app in the past but didn't get to deep into it.
Maybe CM will add feature stock simplifying it.

sling said:
Right on used app in the past but didn't get to deep into it.
Maybe CM will add feature stock simplifying it.
Click to expand...
Click to collapse
Actually I'd say its pretty simple enough in cm7 and I think it should probably stay that way to be user friendly to the not so savvy rooter lol. But above you stated you wanted more control of your kernel pretty much; setcpu gives you total control. You can set a diff governor profile for diff actions(plug, unplug, screen off), battery percentages, etc. I'd say give it a shot.
Sent from my PC36100 using XDA Premium App

[TIP] How I get ~24 hours of battery power from my Galaxy Nexus nearly every day!

I will defer to the xda mods if they think this thread is redundant. I have been using my Galaxy Nexus now for ~3 weeks. During that time, I have seen my daily battery life improve from ~10 hours to a little over 24 hours before needing a charge. I have listed out the power saving strategies I've developed during these 3 weeks following the screenshot [PROOF]:
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1.) Calibrate your battery using the following methods here: Battery Calibration.
2.) While on battery power, set your Nexus display's brightness level to ~30%. I've found that particular brightness level to be a sweet spot. Auto brightness does not work for me, so I hard set the level. I am able to get between ~4 to 5 hours total of screen time a day on battery power at that level. There are many Android Market apps/widgets that will allow you to set power profiles depending on your location and power draw and/or charge.
3.) Along with conservative display settings, I turn off cellular data entirely, or only use 2G (Edge) when connected to a WiFi hotspot. I have an unlocked I9250 Worldband GSM Galaxy Nexus, so I'm unable to address 4G LTE. But if I did have access to 4G LTE, I imagine the only time I would use it would be for tethering while the phone is plugged into a power source. Regardless, 3G (HSPA+) can be a significant power draw, and 4G doubly so. When on WiFi, 3G and/or cellular data is off entirely. My guesstimate is this saves me between 15 - 20% battery power throughout the day.
4.) I set application accounts to sync and updates only when on WiFi.
5.) Avoid rebooting or powering off the phone while on battery power. I've noticed a loss of between ~2 - 5% when rebooting the phone on battery.
6.) No live wallpapers, and the image I do use for a wallpaper is very dark. I set the homescreen widgets to nearly transparent and white text. I'm certain this conserves battery power, but by how much I can't say. [REFER]:
7.) During a typical day for me, I'm constantly using Twitter, Google+, Facebook, Gmail, the ICS Browser, TapTalk, and of course the homescreen widgets connected to network services. I would consider myself an average to heavy user depending on the day. All Gmail is pushed. My widgets update between 1 - 3 hour intervals. You can tell by the screenshot provided my WiFi signal is always on, my Awake and Screen On times are between 4 to 5 hours total of the 24 hours available. As you can see from the screenshot, during that 24 hour period I did not top off with a power charge during that time.
Any other tips for extending battery life are welcome. I hope this helps.

Cool. I keep my phone plugged in when I am in the car or desk and that seems enough for me without having to compromise. 4G is a real killer

Are you using Tasker to kill data when on wifi and enable it when not?
I was under the impression the OS did this automatically
Sent from my Galaxy Nexus using Tapatalk

FYI, the original poster is a HSPA+ user. Entirely different experience from a LTE user.

Err... if there is anything I take away from this thread, its: "If you want 24 hours of battery life on your Google Nexus, don't use it."
It's hard to say for certain, but it sure doesn't look like you used your phone very much over 24 hours. :|

sc4fpse said:
Err... if there is anything I take away from this thread, its: "If you want 24 hours of battery life on your Google Nexus, don't use it."
It's hard to say for certain, but it sure doesn't look like you used your phone very much over 24 hours. :|
Click to expand...
Click to collapse
Total time the screen was on was between 4 to 5 hours total out of that particular 24 hour period. Depends on your definition of "use", but I've seen definitions of moderate to heavy smartphone use defined in various forum posts throughout XDA somewhere between 3 to 6 hours of screen time on a single charge. YMMV.

zoetrope said:
Total time the screen was on was between 4 to 5 hours total out of that particular 24 hour period. Depends on your definition of "use", but I've seen definitions of moderate to heavy smartphone use defined in various forum posts throughout XDA somewhere between 3 to 6 hours of screen time on a single charge. YMMV.
Click to expand...
Click to collapse
Based on that image, there's no way you got even 3 hours of screen on time.

wonshikee said:
Based on that image, there's no way you got even 3 hours of screen on time.
Click to expand...
Click to collapse
I'm certain it was over 4 hours, I remember digging into the screen stats under the battery settings before taking a screenshot. I don't have a screenshot of the screen stat window during that 24 hour period.
Don't believe me? I don't really care. I have nothing to hide and nothing to prove. Just relaying my experience with the GN battery over a 3 week period.

I would rather keep 4g on and just charge throughout the day. Why pay a premium if you're not going to use it, but I suppose you don't have 4g so you don't care.

sc4fpse said:
Err... if there is anything I take away from this thread, its: "If you want 24 hours of battery life on your Google Nexus, don't use it."
It's hard to say for certain, but it sure doesn't look like you used your phone very much over 24 hours. :|
Click to expand...
Click to collapse
This. Doesnt look like 4-5 hours screen time because the phone isnt awake enough.
Sent from my Galaxy Nexus using xda premium

I don't see a problem with the battery life for the size of the phone.
I'm sure it would go a day and a half before needing a charge with my usage (which I consider 'normal') but I plug it in everynight while I sleep anyway.
The battery life definately improves after a few charge cycles.

I agree with sc4, you basically are saying not to use the phone. You do not have to take such extreme measures just to get good battery life. I get pretty good battery life and I don't disable anything.

Well I thought it was a nice post. Jeez. Especially if you compare to most of the crap that comes up in the general section.
I couldn't find where he said "dont use 4g der". I believe the idea he presented was to turn off 3g/4g while you're on wifi. Do you need 4g AND wifi? Easy, common sense. Thumbs up.

Just so you know: WiFi uses the same amount of power to transmit/receive data as 3G. You're not saving anything by turning off the 3G radio while on WiFi since the only thing it's being used for is phone calls and text messages.
In addition, being in WiFi all day long can *really* improve your battery life. It's easily the biggest thing on your list. Why? Because the cell radio isn't constantly trying to maintain a data signal to the 3G towers. It maintains a connection but it doesn't have to negotiate for it almost at all...saves a lot of battery life.
Oh, and that Battery Calibration post is ridiculous. When you first get a phone just discard it fully then charge it up fully. Do it once every few months for the life of the phone and you'll find you maintain great battery life. Outside of that, keep it plugged in as *OFTEN* as you can to maintain longevity.
Also, according to your screenshot, your screen was on a *maximum* of 3 hours, but most likely around 2 1/2. That means the data connection most likely wasn't used much more than that, as well. That's very light use over a 24 hour period.
---------- Post added at 08:31 PM ---------- Previous post was at 08:31 PM ----------
smot13 said:
Well I thought it was a nice post. Jeez. Especially if you compare to most of the crap that comes up in the general section.
I couldn't find where he said "dont use 4g der". I believe the idea he presented was to turn off 3g/4g while you're on wifi. Do you need 4g AND wifi? Easy, common sense. Thumbs up.
Click to expand...
Click to collapse
Well, no, you wouldn't...but it turns off the LTE radio when on WiFi anyway...so that's a moot point.

One more tip:
If you use vibrate on keyboard, shorten it to as low as possible.
This is possible using SwiftKey
Sent from my Nexus S using XDA App

hotleadsingerguy said:
In addition, being in WiFi all day long can *really* improve your battery life. It's easily the biggest thing on your list. Why? Because the cell radio isn't constantly trying to maintain a data signal to the 3G towers. It maintains a connection but it doesn't have to negotiate for it almost at all...saves a lot of battery life.
Oh, and that Battery Calibration post is ridiculous. When you first get a phone just discard it fully then charge it up fully. Do it once every few months for the life of the phone and you'll find you maintain great battery life. Outside of that, keep it plugged in as *OFTEN* as you can to maintain longevity.
Also, according to your screenshot, your screen was on a *maximum* of 3 hours, but most likely around 2 1/2. That means the data connection most likely wasn't used much more than that, as well. That's very light use over a 24 hour period.
Click to expand...
Click to collapse
@ hotleadsingerguy
I'll leave 3G running for the next couple of days, see if there's any difference. Thanks for the info. Are you saying the screen on time reported by the OS is not reliable? If not, know of any apps that do report battery stats and usage reliably?
Galaxy Nexus I9250

@rbiter said:
This. Doesnt look like 4-5 hours screen time because the phone isnt awake enough.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Agreed that is not 4-5 hours of screen time. It is blatant in the graph u provided. Look at the screen and awake times. Here is mine with only 2 hours of screen time but over an hour of voice.
Sent from my Galaxy Nexus using XDA App

To push more, set the animation etc. to 0.5x in the developer options. This should reduce the cpu usage a little bit.
And turn off auto rotate as it consume quite a lot of cpu power. Most probably this is just a bug, there has been a report in the Google code bug yracking.

zoetrope said:
@ hotleadsingerguy
I'll leave 3G running for the next couple of days, see if there's any difference. Thanks for the info. Are you saying the screen on time reported by the OS is not reliable? If not, know of any apps that do report battery stats and usage reliably?
Galaxy Nexus I9250
Click to expand...
Click to collapse
Qhen you go to battery stats tap on the screen percentage. It will tell you exactly how long screen has been on.
Sent from my Galaxy Nexus using xda premium

republitarian said:
Agreed that is not 4-5 hours of screen time. It is blatant in the graph u provided. Look at the screen and awake times. Here is mine with only 2 hours of screen time but over an hour of voice.
Click to expand...
Click to collapse
I agree. I did not get a screenshot of my screen time when I took the screen pic of the timeline graph. I was relying on memory, but after comparing republitarian's pic which has roughly the same timeline span, looks like my memory failed me. Mine is somewhere between 2 - 3 hours of screen time as well. My bad.
Galaxy Nexus I9250

[Q] How's your Galaxy Nexus battery life?

I am just curious to know what other Galaxy Nexus owners are getting out of their battery.
Let me start by sharing mine.
During my sleep or when my phone is idle or when I know I am not using it for a long period of time, I switch my phone to 2G.
Below is a screenshot of my battery usage during a long period of idle (overnight when I am sleeping)
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I only switch it to 3G when I am actively using the Internet for surfing websites, Facebooking, Youtube, uploading photos or video.
Below is a screenshot of my usage from light to moderate to heavy.

I got just over 2 days out of mine with a mixture of wifi, 3g, calls, and general use with facebook, trillian and google+

I went into the bathroom with full charge and after I did my daily deed(s) I went down to 43% with brightness turned all the way down and only running xda app. wtf gives?
Sent from my Galaxy Nexus using xda premium

pcphobic said:
I am just curious to know what other Galaxy Nexus owners are getting out of their battery.
Let me start by sharing mine.
During my sleep or when my phone is idle or when I know I am not using it for a long period of time, I switch my phone to 2G.
Below is a screenshot of my battery usage during a long period of idle (overnight when I am sleeping)
I only switch it to 3G when I am actively using the Internet for surfing websites, Facebooking, Youtube, uploading photos or video.
Below is a screenshot of my usage from light to moderate to heavy.
Click to expand...
Click to collapse
This is EXACTLY the kind of battery life that I am getting.
Quality posting. Thanks

You guys must be on the gsm versions, the only people that aren't happy are the ones on 4g

I have the lte sgn and I would say my battery life is directly related to the screen on time.
The battery is usually completely discharged once the screen on time approaches around 3 hours, regardless of the total time it has been since the last full charge.
Sometimes I can get 20+ hours total life and sometimes I can barely get 5 or 6 hours of total life. Just depends on how fast I reach the screen on time "limit" so to speak of about 3 hours or so.
Sent from my Galaxy Nexus using XDA App

I have the 4g, and ill admit, when i got it the battery life was pretty bad. In part to newphonesyndrom, but stock is pretty bad in general
Currently running peter alfonso's bugless beast 4.0.3 and francico franco's kernel #6. Battery life has gotten wayyy better; so there is a light at the end of the stock tunnel. My phone goes into cpu sleep way more than before, and on the computer side of things, its efficient to the point that the screen uses 75% of battery compared to the 50% i used to see (more battery to screen means less everything else is drawing). And turning down the brightness, i kinda like the fuzzy whites, kinda gives it a paperlike texture
And turn off wifi if you are not actively using, it will just search endlessly. Same with turning off 4g if you are going to be in a 3g area for awhile
Sent from my Galaxy Nexus Bugless Beast 4.0.3 lte +franco#6

Verizon LTE version with 4G turned off. I think i may have .... issues

AgentSmith03 said:
Verizon LTE version with 4G turned off. I think i may have .... issues
Click to expand...
Click to collapse
How high is your screen brightness?
1h45m with screen on is most likely considerably longer than the time the other posters have had their screens on for.
EDIT: I'm saying this because most people with brilliant battery life tend to have LOW screen on time.

darrendm said:
How high is your screen brightness?
1h45m with screen on is most likely considerably longer than the time the other posters have had their screens on for.
EDIT: I'm saying this because most people with brilliant battery life tend to have LOW screen on time.
Click to expand...
Click to collapse
This was at Auto Brightness. I know I had the screen on for a long time, but is this what I need to accept from now on? That after a total time of 2 hours of screen ON time, the battery will be dead? Is the only way to get good battery life to turn off 4G and not use the phone that much? I would expect the phone to be able to survive for at least 3-5 hours even if the screen was on 100%, but maybe I am just being naive.
---------- Post added at 12:59 PM ---------- Previous post was at 12:47 PM ----------
pcphobic said:
I am just curious to know what other Galaxy Nexus owners are getting out of their battery.
Let me start by sharing mine.
During my sleep or when my phone is idle or when I know I am not using it for a long period of time, I switch my phone to 2G.
Below is a screenshot of my battery usage during a long period of idle (overnight when I am sleeping)
I only switch it to 3G when I am actively using the Internet for surfing websites, Facebooking, Youtube, uploading photos or video.
Below is a screenshot of my usage from light to moderate to heavy.
Click to expand...
Click to collapse
I am curious about your battery times. I would like to know your screen "ON" time for at least the light and heavy usage that you reported.
All the battery posts I have been reading on this forum seem to directly correlate to screen "On" time. I have a theory that the battery dies after 2-3 hours of screen on time regardless of most other factors. So some people may get 16-18 hrs of battery time, but the screen was only on for 2.5 hours or so. If you get a chance I would love to see some of your battery reports with the Display on time reported next to them.

AgentSmith03 said:
This was at Auto Brightness. I know I had the screen on for a long time, but is this what I need to accept from now on? That after a total time of 2 hours of screen ON time, the battery will be dead? Is the only way to get good battery life to turn off 4G and not use the phone that much? I would expect the phone to be able to survive for at least 3-5 hours even if the screen was on 100%, but maybe I am just being naive.
Click to expand...
Click to collapse
Well, less than 3 hours is pretty awful.
That's around what I get if I play games like GTA or Shadowgun for more than an hour.
I have the GSM GN so if you did turn 4G off you should have similar times as me. Which are on average 8-12 hours of moderate use including a lot of WhatsApp-ing, some music, some Facebook, some browsing, some calls and texts.
However playing games literally will drink my battery life away, so I tend to keep 3D games to a minimal when on the go.

Sorry if I am stealing the thread. I put this to anyone else with some battery screenshots. Take a screenshot of your display "ON" time and put it next to your total battery on time.
I would love to see if anyone is getting 3-6 hours of screen "ON" time coupled with 10-20 hours of Total Battery Time. Anyone?

AgentSmith03 said:
Sorry if I am stealing the thread. I put this to anyone else with some battery screenshots. Take a screenshot of your display "ON" time and put it next to your total battery on time.
I would love to see if anyone is getting 3-6 hours of screen "ON" time coupled with 10-20 hours of Total Battery Time. Anyone?
Click to expand...
Click to collapse
I seriously doubt it. That is something I genuinely miss about my iPhone 4--I could get 8+ hours of screen on time and well over a day of standby on a single charge.

Stadsport said:
I seriously doubt it. That is something I genuinely miss about my iPhone 4--I could get 8+ hours of screen on time and well over a day of standby on a single charge.
Click to expand...
Click to collapse
OOOH, we are taking that route huh? Well one reason why these lower than average battery times don't bother me that much is because I own 4 batteries for the Galaxy Nexus (2 standard, 2 extended) and can SWAP my batteries whenever I feel like it. Can you do that with your iPhone 4??? No, didn't think so.
P.S. I know you just threw in a iPhone screenshot for the fun of things. Thanks for the laugh!

Screen on time of a little over 3 hours and my battery is in the 30% range.
I definitely agree that the screen on time is the biggest factor. The battery seems to die once 3 or 4 hours of screen on time has been reached, regardless of how long the total life has been.
Sent from my Galaxy Nexus using XDA App

russ4h said:
Screen on time of a little over 3 hours and my battery is in the 30% range.
I definitely agree that the screen on time is the biggest factor. The battery seems to die once 3 or 4 hours of screen on time has been reached, regardless of how long the total life has been.
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
At least you are getting 3-4 hours. I am barely getting 1.5 hours of screen on time before my battery is close to dead. It's alright though, I battery swap regularly and I will figure it out eventually. Just keep turning stuff off till my battery life improves a bit.

Here's mine. GSM, stock 4.0.1.
Sent from my Galaxy Nexus using xda premium

gogol said:
Here's mine. GSM, stock 4.0.1.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
I think that kind of confirms it for me. Your screen on time is in the 3 to 4 hour range and your battery is almost completely discharged.
Once the screen on time reaches the 3-4 hour range, the phone dies. It just took you 2 days to reach the 3-4 hour screen on time.
Sent from my Galaxy Nexus using XDA App

AgentSmith03 said:
OOOH, we are taking that route huh? Well one reason why these lower than average battery times don't bother me that much is because I own 4 batteries for the Galaxy Nexus (2 standard, 2 extended) and can SWAP my batteries whenever I feel like it. Can you do that with your iPhone 4??? No, didn't think so.
P.S. I know you just threw in a iPhone screenshot for the fun of things. Thanks for the laugh!
Click to expand...
Click to collapse
Whoa buddy, ease off the haterade. I wasn't trying to start an argument or anything. I sold my iPhone 4 to buy a Galaxy Nexus, and I'm very happy with my decision. But the reality is the i4 got much better battery life, and I posted a screenshot (from my device) to support that. Swapping batteries wasn't necessary, and carrying around 4 doesn't exactly help your case.
No one is attacking your mother. Chill.

Stadsport said:
Whoa buddy, ease off the haterade. I wasn't trying to start an argument or anything. I sold my iPhone 4 to buy a Galaxy Nexus, and I'm very happy with my decision. But the reality is the i4 got much better battery life, and I posted a screenshot (from my device) to support that. Swapping batteries wasn't necessary.
No one is attacking your mother. Chill.
Click to expand...
Click to collapse
If you are rooted.....install another kernel....it will improve your battery life
Sent from my 4g GUMMY Nexus

Battery Life thread

hey i know every once in a while someone post a thread *****ing about battery life but i need some serious help. i think my pictures will speak for themselves. iv calibrated battery, wiped clean phone. drained battery and recharged to 100 percent. anything anybody has posted before im almost sure i have tried to no avail
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As you can see only 18 mins off the Charger and already down to 90 percent! and thats with WIFI GPS BLUETOOTH AND 4G OFF!
my setup is on one of the pictures.
could it be a faulty battery?

I've been having this problem too, RECENTLY. used to be fine a month ago. Idk what's going on really
Sent from my SPH-D710 using xda premium

I'll bite. First off, detail your setup. modem, kernel, ROM.
Second, from your graph it doesn't look like you are in a good service area, how many bars do you usually have?
4+ in screen time. At 4% left.
Rom: calkulin 2.8.1
Kernel: rogue desperado
modem: ek02
undervolted -100mv with calk's script. Max cpu set to 1ghz

kasper19 said:
I'll bite. First off, detail your setup. modem, kernel, ROM.
Second, from your graph it doesn't look like you are in a good service area, how many bars do you usually have?
4+ in screen time. At 4% left.
Rom: calkulin 2.8.1
Kernel: rogue desperado
modem: ek02
undervolted -100mv with calk's script. Max cpu set to 1ghz
Click to expand...
Click to collapse
Sorry i could have sworn i uploaed a picture of my setup. its now the third picture.
i usually have around 3-4 bars. at that time i was at work but that is a constant drain home or anywhere else. at home i get much better signal.

Have you ever had reasonable battery life, or is this a new issue?
It's possible that your battery is bad, but I think it's unlikely unless it's been under high temps for an extended time.
Some suggestions I'd try if it was me;
- backup your sd card and reformat it
- try running calk 2.8.1 without the ics theme to see if usage improves
- run your setup without wiping/flashing for a few days and see if the phone settles in
Good luck getting it sorted.
Sent via EM waves.

When I first started, I was getting horrible battery life. Like 50% loss in 4 hours. Here are a few things you can try.
1. Turn off auto sync to google
2. Turn off facebook and sync
3. Turn off email syncing
You get the pattern. I think for me it was the fact that I was in a horrible reception area and all of the syncing made the phone constantly try to get a connection. Now i get 5-10% loss in 4 hours, which I'm happy with.
Kernel and modem are important too, so might help to tell us what you're using exactly.
Hope this helps.

EL26 and EL29 Kernels/Modems were huge battery drainers for me.

My set up is calks 2.8.1
Kernel: Desperado flashed yesterday
And modem El 36.

You ask about having strong cell signal, I guess it will drain the batter if you're going in and out of service? Just curious because on my way to and from our shop there is one spot where all phones drop service. It only lasts about 1/8 mile but it happens with every carrier I've tested.

Like someone above said turn off all syncing also keep in mind that phone batteries now dont hold the first 10% of a full charge because that damages the battery in the long run. The first 10% always goes down that fast unless you bump charge which is when you plug in to 100% then unplug and replug for 5 minutes and repeat a few times. If it continues to die like that then try underclocking with setcpu while you have it with screen off or in a phone call also you can undervolt. Turn off auto syncing and check to see what proccesses you have running that eat your battery and kill them.
Sent from my SPH-D710 using xda premium

I'll give you one solid advice. Run Blazer ROM.

Go back to stock voltages.

Mu5ic92 said:
hey i know every once in a while someone post a thread *****ing about battery life but i need some serious help. i think my pictures will speak for themselves. iv calibrated battery, wiped clean phone. drained battery and recharged to 100 percent. anything anybody has posted before im almost sure i have tried to no avail
As you can see only 18 mins off the Charger and already down to 90 percent! and thats with WIFI GPS BLUETOOTH AND 4G OFF!
my setup is on one of the pictures.
could it be a faulty battery?
Click to expand...
Click to collapse
How long does the battery last to an almost full discharge? I had the same problem when I flashed a new ROM and tried calibrating the battery as you did (deleting battery stats file). I'd unplug my phone after a full chatge and 30mins later would be down to below 90%.
Turns out that deleting the battery stats file may not do anything to our phone in terms of calibration, and the way to calibrate it is by doing a battery pull for half an hour or so. Then just using the phone, and the battery eventually calibrates itself. Can't remember the link where I read this, but after doing that and after a couple weeks of usage, the first 10% drop wasn't so dramatic. I currently get a day with an average of 3-4 hour screen on time. Using the same ROM that seemed to give me problems in the first place.
Also like someone else mentioned, phone signal is a huge factor in battery usage. One of the cell towers went down where I live, and during those 7 days (yeah, thanks sprint!), my phone would constantly jump back and forth off of roaming... battery life would tank so quickly that I turned off data/3G/4G to get any semblance of battery life.

beezar said:
How long does the battery last to an almost full discharge? I had the same problem when I flashed a new ROM and tried calibrating the battery as you did (deleting battery stats file). I'd unplug my phone after a full chatge and 30mins later would be down to below 90%.
Turns out that deleting the battery stats file may not do anything to our phone in terms of calibration, and the way to calibrate it is by doing a battery pull for half an hour or so. Then just using the phone, and the battery eventually calibrates itself. Can't remember the link where I read this, but after doing that and after a couple weeks of usage, the first 10% drop wasn't so dramatic. I currently get a day with an average of 3-4 hour screen on time. Using the same ROM that seemed to give me problems in the first place.
Also like someone else mentioned, phone signal is a huge factor in battery usage. One of the cell towers went down where I live, and during those 7 days (yeah, thanks sprint!), my phone would constantly jump back and forth off of roaming... battery life would tank so quickly that I turned off data/3G/4G to get any semblance of battery life.
Click to expand...
Click to collapse
Don't think this is the same thread you mention, but here's one on battery calibration. I might give it a try, figure it can't hurt anything.

Rom took a couple days to settle in thsn BAM! 5 HRS screen on time. Stock el29 tegrak uv 75 Strongsteve. I did flash back to eko2 modem After high battery drain on EL 29
Sent from my SPH-D710 using Tapatalk

Am I the only one who can squeeze 4 days out of their e4gt? That's with texting fairly often, emails, downloading an app or two, and checking my facebook once a day or so.

I unplug my phone at 8:30am and get home at 6:00pm and I'm at 60%. That's with 1 hr reading and some texting, compared to my Evo my S2 is a god sent.

MultiLockOn said:
Am I the only one who can squeeze 4 days out of their e4gt? That's with texting fairly often, emails, downloading an app or two, and checking my facebook once a day or so.
Click to expand...
Click to collapse
One to two days, I won't question you on that (i get 2 days on Blazer ROM easy) BUT 4 days?!!! I seriously question that.
Sent from my SPH-D710 E4GT

MultiLockOn said:
Am I the only one who can squeeze 4 days out of their e4gt? That's with texting fairly often, emails, downloading an app or two, and checking my facebook once a day or so.
Click to expand...
Click to collapse
That's awesome. Screenshots of battery life including display on time?

MultiLockOn said:
Am I the only one who can squeeze 4 days out of their e4gt? That's with texting fairly often, emails, downloading an app or two, and checking my facebook once a day or so.
Click to expand...
Click to collapse
I do not believe without some solid evidence and more info.
Sent from my SPH-D710 using Tapatalk

I love the battery life of this thing! Its unbelieveable...

The battery life is Godly on the Galaxy Nexus (Mine's a GSM model...I have no clue about the CDMA version)
With around 10 calls made, my brightness using the power control widget at "half" (I think its something like 40%), wifi on all day, data on, bluetooth&GPS off, NFC off, and almost 2 hours of onscreen time spent texting, surfing the web and gaming I got almost 22 hours on battery with 46% remaining! Pics for proof:
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For those interested in getting this type of performance, I have sync OFF and manually sync whenever I want to check something (mail, weather widget, etc)
I have not had a phone with this great of battery since the Xperia Ray. This is unbelieveable though.
Also for those interested this is what I am running for ROM:
Android version: 4.0.3
Kernel Version: 3.0.18-imoseyon-1.9.0-04417-gcef4285 [email protected] #408
Build number: Gummy-MAGURO v0.7.6
Now how should I kill off my remaining 46%? Because web browsing, playing Nintendo 64 games, Facebook, are not cutting it! LMAO

100% WiFi use and no auto-sync or background data on, that's not surprising whatsoever.

martonikaj said:
100% WiFi use and no auto-sync or background data on, that's not surprising whatsoever.
Click to expand...
Click to collapse
Its not supposed to be a "surprise". I am just saying that the battery life is great. Oh and background data is ON...yes ON!

Adreno said:
Its not supposed to be a "surprise". I am just saying that the battery life is great. Oh and background data is ON...yes ON!
Click to expand...
Click to collapse
Which doesn't matter if you don't have auto-sync lol.

martonikaj said:
Which doesn't matter if you don't have auto-sync lol.
Click to expand...
Click to collapse
Ah...yes. I seem to have fallen on my face. Please accept this cookie *gives cookie*
On another note, could you tell me if games are able to push background data with auto sync off? I've always wondered that.

For what it's worth, Samsung said this phone should have a six day standby time and twelve hour usage time...
Maybe turning all the features of the phone off will help, but then why have a phone like this if you limit it so much?

EP2008 said:
but then why have a phone like this if you limit it so much?
Click to expand...
Click to collapse
Its not really limiting it though.
If I want to see the weather, I touch the widget to sync. If I want to see if I got any mail, I go into the app and it will sync...I get my data when I choose to.
I don't own anything to hook up via blue tooth, and I will just turn GPS on when I check google maps, takes an extra 3 seconds.
I am not missing out on anything, I am literally getting 2 days between charges. But I charge every night anyways, so I can basically surf the web or do whatever on the device all day and still have a ton of juice at the end of the day.

hey man, if thats how u use your phone, then u have great battery life! everyone's uses are different! people can say "oh your bluetooth isnt on" but not everyone uses bluetooth, or needs their auto sync on, etc! some people like to check these things manually

you should update your kernel to 1.10, reports have said that it brings back battery of 1.7.4 but also ups the overall speed/smoothness of the phone

Simer03 said:
hey man, if thats how u use your phone, then u have great battery life! everyone's uses are different! people can say "oh your bluetooth isnt on" but not everyone uses bluetooth, or needs their auto sync on, etc! some people like to check these things manually
Click to expand...
Click to collapse
Yeah I mostly just call, text, websurf, and game. So it works for me.
In comparison, using my Xperia x10, Samsung Captivate, Desire Z, Desire S, Xperia Arc, Nexus S, and Xperia Ray I never got battery life like this. The Ray was close, but this is even better...considering the size of the screen this is really great in my opinion.
I just love this device so much, I am thinking I will just always stick to the Nexus line of devices for now on.

andy2na said:
you should update your kernel to 1.10, reports have said that it brings back battery of 1.7.4 but also ups the overall speed/smoothness of the phone
Click to expand...
Click to collapse
Would that give me even more battery?
I think I am just impressed with this so much because next to what I was running at stock (4.0.1) this blows it away.

Having the screen on for ~2hours is not a clear representation of it's battery life.

Adreno said:
Would that give me even more battery?
I think I am just impressed with this so much because next to what I was running at stock (4.0.1) this blows it away.
Click to expand...
Click to collapse
you are using leankernel 1.9.0, so a quick update and you can compare yourself
some reports from the thread:
http://rootzwiki.com/topic/13299-kernel-leankernel-minimalistic-kernel-1100-2912/page__st__280

You disable auto sync.. that means you have no life.. you can't call your phone as "smartphone"
Sent from my Galaxy Nexus using xda premium

I too think this phone has best battery life ive had particularly idle time. Screen on is a tad high, but all averaged together gives this phone excellent battery life.

EP2008 said:
For what it's worth, Samsung said this phone should have a six day standby time and twelve hour usage time...
Maybe turning all the features of the phone off will help, but then why have a phone like this if you limit it so much?
Click to expand...
Click to collapse
Look, Samsung has NO way to give standby times when everyone uses their phone differently. I sync differently from you. This phone WILL get six days standby. My old Vibrant is rated at 16 days standby, and you know, it just about will get that. "Standby" times aren't "my screen is off". Standby times are no data/wifi/sync and my screen is off. My mother has my unlocked Vibrant on AT&T. She doesn't have a data plan. Data/Sync is off. It's used as a PHONE. After her normal use, which is about 10 minutes of talking a day, it'll be at around 40% after 6 days. At that point, she usually charges it... and that's with evil, battery draining TouchWiz! There is no way for a manufacturer to adequately predict standby times with a device connected to a data network.
Honestly, for the life of me I can't figure out why this is an amazingly hard concept for people to grasp. Just because it's a "smart phone" doesn't mean that manufacturer's test battery life with data/wifi on. Probably because unlike the majority of people in every random battery thread on the internet, manufacturer's realize that once a data network comes into play, usage/sync WILL be different. Even power consumption can vary from tower to tower.

zephiK said:
Having the screen on for ~2hours is not a clear representation of it's battery life.
Click to expand...
Click to collapse
What do you feel is a clear representation?
I've a feeling every person has a different opinion on this.

I'm impressed
I get up at 4.30am for work
get home about 6pm
I have about 60% left
then I destroy that as its unlimited data plan inc tether is my broadband at home.

KWKSLVR said:
Look, Samsung has NO way to give standby times when everyone uses their phone differently. I sync differently from you. This phone WILL get six days standby. My old Vibrant is rated at 16 days standby, and you know, it just about will get that. "Standby" times aren't "my screen is off". Standby times are no data/wifi/sync and my screen is off. My mother has my unlocked Vibrant on AT&T. She doesn't have a data plan. Data/Sync is off. It's used as a PHONE. After her normal use, which is about 10 minutes of talking a day, it'll be at around 40% after 6 days. At that point, she usually charges it... and that's with evil, battery draining TouchWiz! There is no way for a manufacturer to adequately predict standby times with a device connected to a data network.
Honestly, for the life of me I can't figure out why this is an amazingly hard concept for people to grasp. Just because it's a "smart phone" doesn't mean that manufacturer's test battery life with data/wifi on. Probably because unlike the majority of people in every random battery thread on the internet, manufacturer's realize that once a data network comes into play, usage/sync WILL be different. Even power consumption can vary from tower to tower.
Click to expand...
Click to collapse
Perhaps you're giving Samsung too much credit. Apple lists the details of their battery tests on their site, and when they say "10 hours of use", it's not piddling around with sync off, location off, etc. it's actual use (calls, web browsing, video, music).
Look at gsmarenas battery tests http://blog.gsmarena.com/samsung-galaxy-nexus-battery-life-fully-tested-results-come-out-disappointing-test/.. Galaxy Nexus is tied for second worst and all phones were tested the same way. Maybe "real world" use will affect a single device from day to day, but when a phone is compared to close to twenty other phones under the same conditions, it makes you realize how poor the battery life is. Maybe 4.0.5 will make things better... I hope so.

Sorry for a newbie question.
I've had Auto Sync ON all day and I wonder what Auto Sync does exactly ?
Can someone light my day ? Thanks