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

[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

Battery Life

What kind of usage are you guys getting out of your SGS2's now ?
I took my phone of the charger at 7 am today & it died at 2 pm. had minimal usage - a few texts, pic message, a call, and 5 mins of GPS use.
I have bullet kernel, stock rom (GB 2.3.5)
7 hours of minimal is pretty bad. really shouldn't be the battery after only 8 months, but i will probably pick up a new one anyway

I can get up to 20 hours of battery for what i consider moderate use. What really shows the usage is the screen on time. I can get between 3.5 hours - 4 hours of screen/display on time. ( see in your system battery info). (I could not break 2.5 hours display on time on my HTC One S so I sold it)
After ICS update my battery life sucked until i master reset. Now I am back to normal.
I am running and have been running stock roms. In the past I was a flash junkie... but this phone has never needed an aftermarkey ROM. It has always run flawlessly stock.

I'm getting around 18-20 hours with moderate usage. I mostly just browse on the internet during downtime at work, which can be more than a few hours straight.
I'm was using Juggernauts v5.0 up until today. Just flashed Darkside v4. We'll see how it holds up.

motorjonny said:
I can get up to 20 hours of battery for what i consider moderate use. What really shows the usage is the screen on time. I can get between 3.5 hours - 4 hours of screen/display on time. ( see in your system battery info). (I could not break 2.5 hours display on time on my HTC One S so I sold it)
After ICS update my battery life sucked until i master reset. Now I am back to normal.
I am running and have been running stock roms. In the past I was a flash junkie... but this phone has never needed an aftermarkey ROM. It has always run flawlessly stock.
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Click to collapse
Agreed!! I tried out other ROMs when I first got my s2 but as you said, it never needed an aftermarket ROM ...I do however use Bullet kernel and notice a substantial difference on "lag free" setting
But 20 hours !?!? ...i think mb i can get that much if I don't touch my phone even once. hmm ..i guess i will give tracking the screen on time & seeing if I fall in that 4 hr range

ashens said:
I'm getting around 18-20 hours with moderate usage. I mostly just browse on the internet during downtime at work, which can be more than a few hours straight.
I'm was using Juggernauts v5.0 up until today. Just flashed Darkside v4. We'll see how it holds up.
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Click to collapse
hmm ...seems like i am getting a third of what i should be getting on minimal usage, not even moderate. had the phone 8 months & alternate batteries and even w/o doing that, the stock battery should be fine after only 8 months ...wonder why i get such poor battery life now

wrestlerkid said:
hmm ...seems like i am getting a third of what i should be getting on minimal usage, not even moderate. had the phone 8 months & alternate batteries and even w/o doing that, the stock battery should be fine after only 8 months ...wonder why i get such poor battery life now
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Click to collapse
Any luck improving your battery life?
I have the Telus version and have always had about 12 - 16 hours with minimal usage on the stock rom which is pretty bad. I recently flashed CM9-beta1 and I'm lucky to get 6-8 hours like yourself. I love cyanogenmod but this is unacceptable.

This is my results with AOKP whitehawkx kang 7/15, darkside AOKP kernel #2, CPU sleeper 2.3
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ashens said:
I'm getting around 18-20 hours with moderate usage. I mostly just browse on the internet during downtime at work, which can be more than a few hours straight.
I'm was using Juggernauts v5.0 up until today. Just flashed Darkside v4. We'll see how it holds up.
Click to expand...
Click to collapse
How much screen on time is that? People need to realize that just saying how long your phone lasts means nothing without screen on time. I will usually get around 3 hours screen on time, whether that be me using moderately for 15 hours, or heavy usage for 4 hours, screen on time will always be around 3 hours
Like today I had off and have been using my phone a lot
Now if I had worked my phone would probably be at 70 with like an hour of screen on time.
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Tapatalk 2

The problem with your battery running low quick is because you are running Gingerbread! Ice Cream Sandwich runs faster and has 70% better battery life! I have went 18 hours on moderate usage and about 14 hours on more harder use! As for light usage I have went 2 days on a full charge!
I just HIGHLY suggest that you switch over to either stock ICS or a Customized ROM!

JALStudios said:
The problem with your battery running low quick is because you are running Gingerbread! Ice Cream Sandwich runs faster and has 70% better battery life! I have went 18 hours on moderate usage and about 14 hours on more harder use! As for light usage I have went 2 days on a full charge!
I just HIGHLY suggest that you switch over to either stock ICS or a Customized ROM!
Click to expand...
Click to collapse
Like I said saying how long the battery last means nothing without screen on time. And I disagree, I had much better battery life on Gb than on Ics
Sent from my SGH-T989 using Tapatalk 2

Ugh, not another battery life thread -.- smh..
Battery life is not determined by ROM, Kernel, or usage statistics. Yes it has a general impact but not nearly as much as...
LOCATION!
When your phone switches from HSPA to EDGE or any other service type, that initialtes a wake lock, uses power to switch frequencies. Uses power to update the ROM and all apps that you are now on whatever frequency. Now it does that all the time you switch from HSPA, HSPAP, EDGE, GPRS. So if your in a place with excellent signal then yes your battery life will be much better than in a place with low to no HSPA cause then your phone is constantly switching signals.
About GB and ICS, generally speaking ICS will be better at battery handling and power consumption. When i had CM7 on my HD2 in airplane mode, running not nothing but wifi, then again on CM9, CM9 lasted about a half day longer.
But again, location is more important then screen on times and battery life lengths.

If you really care about your battery life, just get an extra battery and portable charger. Doesnt make since to get a smartphone and not use it because your worried about battery life.
Sent from my SGH-T989 using xda premium

I can usually get around 24 hours out of a charge on a normal day running AOKP.

My T-mo Note II 2 Battery issue!

The battery life on my Note II does not seem to compare near at all that of what I have heard and seem from others I am a T-Mobile user and I've seen people get atleast 24 hours or atleast 20 hours on heavy usage, check out my screen shots and see if anyone knows? The battery discharged 1% within 3 minutes!
I even have juice defender enabled which makes it even sadder!
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Lilryke said:
The battery life on my Note II does not seem to compare near at all that of what I have heard and seem from others I am a T-Mobile user and I've seen people get atleast 24 hours or atleast 20 hours on heavy usage, check out my screen shots and see if anyone knows? The battery discharged 1% within 3 minutes!
I even have juice defender enabled which makes it even sadder!
View attachment 1828953
View attachment 1828954
View attachment 1828955
Sent from my SGH-T889 using xda app-developers app
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Click to collapse
I have never got 20 hours on heavy usage. What is your screen on time?
CARBON NIGHTLY | KROZ HUE THEME | CRACK FLASHER

Ive gotten 16 before but ive seen screeshots on here of people with 20hrs and 1day and so on, but here ya go
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Lilryke said:
Ive gotten 16 before but ive seen screeshots on here of people with 20hrs and 1day and so on, but here ya go
View attachment 1829003
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Click to collapse
That is average. You may want to not use a live WP though.
CARBON NIGHTLY | KROZ HUE THEME | CRACK FLASHER

Really dont know about battery times of the Note II. But do battery cycles. Let the phone turn off by it self then recharge to 100% a couple of times. And I recommend you downloading BetterBatteryStats to see what really is eating your battery out. Post a screenshot of it and post it, let some of the BBS veterans diagnose the problem. With what I know I can help. BTW you on stock/stock (ROM/kernel)?
Sent from my SPH-L710 using xda premium

Lilryke said:
The battery life on my Note II does not seem to compare near at all that of what I have heard and seem from others I am a T-Mobile user and I've seen people get atleast 24 hours or atleast 20 hours on heavy usage, check out my screen shots and see if anyone knows? The battery discharged 1% within 3 minutes!
I even have juice defender enabled which makes it even sadder!
View attachment 1828953
View attachment 1828954
View attachment 1828955
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
Looks like you have ****ty signal most times. If you're on wifi most of the time turn off mobile data and use wifi calling if you need. If you turn off mobile data and it still dies that quick somethings wrong. Also juice defender can oftentimes have a negative effect, try it without. Also, you used your phone almost continuously. 5 hours screen time out of 8?
---------- Post added at 11:50 PM ---------- Previous post was at 11:48 PM ----------
mar.ioo said:
Really dont know about battery times of the Note II. But do battery cycles. Let the phone turn off by it self then recharge to 100% a couple of times. And I recommend you downloading BetterBatteryStats to see what really is eating your battery out. Post a screenshot of it and post it, let some of the BBS veterans diagnose the problem. With what I know I can help. BTW you on stock/stock (ROM/kernel)?
Sent from my SPH-L710 using xda premium
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Don't cycle your battery. Will only hurt your battery not help. System Tuner also works nice to tweak a few things and add some battery, Better BatteryStats is a great tool as well.

I have bbs also Im new to it but Im just not sure what im looking at but here are some SS's below
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Lilryke said:
I have bbs also Im new to it but Im just not sure what im looking at but here are some SS's below
View attachment 1829032
View attachment 1829033
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View attachment 1829037
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
Yeah juice defender is causing a ton of wakelocks. Of course, again you seem to have zero data connection or signal most times. If you use your phone almost constantly juice defender will def have a negative effect. I know from experience.

Lilryke said:
I have bbs also Im new to it but Im just not sure what im looking at but here are some SS's below
View attachment 1829032
View attachment 1829033
View attachment 1829035
View attachment 1829036
View attachment 1829037
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
Ok. First uninstall Juice Defender its only making it worse. When not using GPS turn it off. You have weak signal plus GPS on thats 3x the drain since its always looking for location. Again same with WiFi. When not in a place with it turn it off.
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Ok so its a definite that ill uninstall JD, thanks again guys for the advice ill do all of this and as u can see in my last ss's I got the update push so ill see how everything goea tomorrow and keep u updated, thanks again gunna uninstall jd and update to the new jellybean version
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Lilryke said:
Ok so its a definite that ill uninstall JD, thanks again guys for the advice ill do all of this and as u can see in my last ss's I got the update push so ill see how everything goea tomorrow and keep u updated, thanks again gunna uninstall jd and update to the new jellybean version
Sent from my SGH-T889 using xda app-developers app
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Click to collapse
Good to hear! Also screen brightness has a lot to do with screen on time.. It not the same 3h of screen on time with 100% brightness than with 30%. The less bright as possible the better buddy.
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mar.ioo said:
Good to hear! Also screen brightness has a lot to do with screen on time.. It not the same 3h of screen on time with 100% brightness than with 30%. The less bright as possible the better buddy.
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Click to collapse
+1 100% brightness is awesome but a major killer on battery when you don't really need it.

Its better than that one day however I did not begin to use it intensely until later on at night and just played a few games of ruzzle on wifi and it dropped about 15% within the 2 hours so its a so so solution as of now I ordered a gold battery with 4200mAh of power hopefully that'll show some improvement
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Lilryke said:
Its better than that one day however I did not begin to use it intensely until later on at night and just played a few games of ruzzle on wifi and it dropped about 15% within the 2 hours so its a so so solution as of now I ordered a gold battery with 4200mAh of power hopefully that'll show some improvement
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
4200mAh its a beast my friend! Enjoy!
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I'm runnng the international XXDMB6 based ROM on mine and currently, I'm at 76% with only an hour and 3 minutes of screentime?
I don't use Wi-Fi.
My LTE signal is rather poor.
My screen generally stays around 50% but it's on auto.
Of course I let my apps sync. But that's pretty much just gmail and facebook.
I have my weather set to sync once every hour.
I uninstalled the apps that are pretty much bloat (flipfonts, the hubs, the samsung live wallpapers, musicFX since I use DPSManager, Samsung's music app and that's all I can think of)
I'm running Perseus's kernel with about 200-350mV undervolts.
Is it truly the poor LTE signal that's taking such a toll on my battery life? I used to average 5-5.5 hours before my battery dies. Now I'm betting I'll only get around 4. When I had Verizon, the power draw from LTE was unnoticeable from 3G. Is it really that different on GSM phones?

I found Battery Drain Analyzer helpful. I kept it running for a couple of months and was able to determine which apps consume the most power (widgets, by far). But, after having spent weeks trying different underclocking configurations and apps without success, I ended up buying three extra batteries. It's really awesome to not have to worry about it. I just keep them in my pocket and swap them out as needed. It's not a very technologically advanced solution, but, it sure is effective. I use this Charger for the spares. It takes a long time to charge the batteries, but charges them fully to 100% and I believe that the batteries hold the charge better, whereas, charging the battery in the phone doesn't seem to work as well.
If you would rather go the tweak/underclock route, I agree with the others that Juice Defender does more harm than good. I had better luck with SetCPU.
But, as stated above, I eventually opted for high performance and extra batteries. For me, the ability to run the phone at full speed, to multitask smoothly, and generally to be able to take advantage of the device's full technological potential is worth the cost of the spares. And, not insignificantly, now that I am no longer spending time on trying to increase battery life through hacks/tweaks/apps, I have more time (and speed and processing power since I can overclock without concern) to flash, mod, tweak, and customize all the other aspects of my phone.

bellator7 said:
I found Battery Drain Analyzer helpful. I kept it running for a couple of months and was able to determine which apps consume the most power (widgets, by far). But, after having spent weeks trying different underclocking configurations and apps without success, I ended up buying three extra batteries. It's really awesome to not have to worry about it. I just keep them in my pocket and swap them out as needed. It's not a very technologically advanced solution, but, it sure is effective. I use this Charger for the spares. It takes a long time to charge the batteries, but charges them fully to 100% and I believe that the batteries hold the charge better, whereas, charging the battery in the phone doesn't seem to work as well.
If you would rather go the tweak/underclock route, I agree with the others that Juice Defender does more harm than good. I had better luck with SetCPU.
But, as stated above, I eventually opted for high performance and extra batteries. For me, the ability to run the phone at full speed, to multitask smoothly, and generally to be able to take advantage of the device's full technological potential is worth the cost of the spares. And, not insignificantly, now that I am no longer spending time on trying to increase battery life through hacks/tweaks/apps, I have more time (and speed and processing power since I can overclock without concern) to flash, mod, tweak, and customize all the other aspects of my phone.
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Click to collapse
Thanks for a good advise.
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