Database Users

Froyo (2.2) Increased My Battery Life

I know one of the major concerns regarding the EVO has been the battery life. It was the reason that I rooted my phone in the first place, granting me the ability to rip out bloatware to conserve battery life. It wasn't until Saturday that I got around to noticing the rooted version of the official 2.2 release. All I did was download the ROM and delete all the apks/odexes I didn't want from the zip file, load it, charge my battery. Currently, I've been going almost 70 hours and am still at 60% battery life under normal use. That's a significant increase. The best I ever got was after the rooted second OTA at about 40 hours pushing the battery down to about 10%. Have other people been seeing battery life increases like this?

No, we have not. Quit bragging..

Serious? Experiment with more use of battery life
Sent from my PC36100 using XDA App

I have noticed better battery life but not as good as you say. I've tried many different roms and kernels also.

do you actually use your phone on a daily basis? do you have any emails being synched? gmail? exchange? do you use facebook? browse the internet every 4-6 hours to see whats news on BGR or usatoday/cnn? do you text msg.. etc etc
if i leave my phone sitting i can have great battery life too, don't get me wrong i'm not trying to bash you, just trying to understand how you use phone so i can guage if this can apply to me. i know people who haven't installed one single app on their evo yet, usuage is different for everyone.....

Did you say 70 hours? Is that a typo? That's 2.916666666666666666666667 days and you've only dropped 40% battery life?

IceCreaMan said:
do you actually use your phone on a daily basis? do you have any emails being synched? gmail? exchange? do you use facebook? browse the internet every 4-6 hours to see whats news on BGR or usatoday/cnn? do you text msg.. etc etc
if i leave my phone sitting i can have great battery life too, don't get me wrong i'm not trying to bash you, just trying to understand how you use phone so i can guage if this can apply to me. i know people who haven't installed one single app on their evo yet, usuage is different for everyone.....
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I was super nervous when I suggested the evo to my aunt's family over the iphone 4. AT&T doesn't even have 3g where they live though. Asked them if they had any battery issues with their 4 evo's and they looked me like I was crazy. Then I found out that they all only had like 1 app installed. They get great battery life on their stock 2.2 phones. If I play around with my phone, and I do, I usually am riding the red line by the end of the day.
Sent from my PC36100 using XDA App

I don't use my phone that much for phone calls, actually. Several hundred texts a month, several megs of data a month. It's synched with gmail, I have a separate phone for everything else (work). At work I'm always on 3G, at home wifi. The only time it's not actively connected to a network is when I'm sleeping (sleep profile is only for the alarm). Outside of synching, I use the internet for random browsing periodically, usually sports related, or anytime I'm not at home or work and want information.
When I put this ROM on, I stripped out over 60 files from the zip file (almost 20megs) and only installed about 8 apps that I use regularly. After I configure my phone for all my settings, I remove all the widgets everywhere and setup just three screens with my widgets.
Even though I'm in Dallas, I rarely use 4G (the higher wavelength doesn't penetrate well in the urban areas I work or live in), only turn on GPS when I'm using Google Maps to drive around, and never have both wifi and 3G (Mobile) on simultaneously. I have my profiles setup so that the only time my screen brightness is above 0 is when I'm in my car or on a need basis (separate Bright profile).
I probably would have rooted my phone eventually but I did it about the third day I owned it because of the battery life. Most of the settings and ways I use the phone revolve around making sure I don't tax the battery. My real goal was being able to leave home for more than a day and not having to worry about minimizing my usage of anything, and now it seems I've easily done that.

jdh012400 said:
I know one of the major concerns regarding the EVO has been the battery life. It was the reason that I rooted my phone in the first place, granting me the ability to rip out bloatware to conserve battery life. It wasn't until Saturday that I got around to noticing the rooted version of the official 2.2 release. All I did was download the ROM and delete all the apks/odexes I didn't want from the zip file, load it, charge my battery. Currently, I've been going almost 70 hours and am still at 60% battery life under normal use. That's a significant increase. The best I ever got was after the rooted second OTA at about 40 hours pushing the battery down to about 10%. Have other people been seeing battery life increases like this?
Click to expand...
Click to collapse
Hey I did not even know you could get that much time out of a single charge.... I am going at least 17 hrs before empty but thats enough for me in a full day. Hey honestly a car charger is on $13 at Walmart.

well i tried the "shut the phone off" mod and ive been getting weeks of use out of my phone on a single charge.
http://forum.xda-developers.com/showthread.php?t=757635

JI6 update: a *serious* let-down, in my opinion

So, this post is 1/2 "rant" and 1/2 "any ideas", but the JI6 Update has been (in my opinion) a very serious letdown.
First of all, I can't be alone in thinking that the late-September update from Samsung would be a full-blown upgrade to Froyo. Obviously it's not. I guess we'll wait awhile before that's released
Secondly, I'm one of those sorry saps that had the update soft-brick my phone. It took me a few days to get around to the ODIN fix (bumping me back to "stock"), but it was still a royal pain.
Thirdly, I've already seen some issues that I didn't have before. For instance, the phone "froze" on me while sitting at home: no screen response. I had to pull the battery and power up again. Nice!
Finally, the battery life is utterly horrible for me -- and I'm not sure why. Currently at 26% battery life (now 8h 4m since unplugged). 34% of the usage is "display", which has been on for 28m total. 22% is cell standby. 15% is phone idle. 10% is voice calls (2m 10s of that). 8% is the Android System. So on and so forth. Basically, I've *hardly* used my phone today, yet the battery isn't going to last thru to the afternoon. I have 6 active applications, with none of them hitting the CPU at all currently. Best of all? The battery icon looks like I'm about 1/2 full, so evidently Samsung couldn't be bothered to make that icon accurate. I know about the battery icon mods out there (I've used 'em), but I figured Samsung would take care of that.
Sorry for the venting, folks. Is anyone else seeing similar stuff? Any ideas on the lame battery life??
Thanks,
Yip

For me Android 2.1 which samsung released in Galaxy S is exactly like Windows Vista ! No matter how many updates you release for it still will make your phone **** !
The only option is to release a full new OS which is Windows 7 = Froyo !

Better than Windows NT = 1.6

Getting your phone bricked isnt the updates fault, there are hundreds of threads out there and reading just one couldve given you signs of warning.
As for your battery life, I am willing to bet your phone screen is full of widgets. Try limiting those, as well as automated syncing. I get excellent battery life that can EASILY last me the whole day (I actually find myself running avatar/pandora at the end of the night just to drain it so I can recharge the battery).
However, I do agree that the inaccurate battery reading should have been fixed a long time ago (or at least in this update) and that froyo should have been included with the release of this phone.

Your cell standy is too high which means you have things constantly using the cell signal to pull data, thus draining your battery. Right now I'm at 72% with 67% display, 14% voice calls, and 9% cell standby. Been unplugged for 3 and a half hours.
Not great but I'm purposely trying to let it die because I'm reconditioning.

The_wolf88 said:
For me Android 2.1 which samsung released in Galaxy S is exactly like Windows Vista ! No matter how many updates you release for it still will make your phone **** !
The only option is to release a full new OS which is Windows 7 = Froyo !
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Click to collapse
Ha! You may just be right on that. Eclair seems like a fairly lame version of Android, if you ask me. Not horrible, but not great.
anthonys2r said:
Getting your phone bricked isnt the updates fault, there are hundreds of threads out there and reading just one couldve given you signs of warning.
As for your battery life, I am willing to bet your phone screen is full of widgets. Try limiting those, as well as automated syncing. I get excellent battery life that can EASILY last me the whole day (I actually find myself running avatar/pandora at the end of the night just to drain it so I can recharge the battery).
However, I do agree that the inaccurate battery reading should have been fixed a long time ago (or at least in this update) and that froyo should have been included with the release of this phone.
Click to expand...
Click to collapse
"Signs of warning" means nothing, my friend. There are folks who didn't even *root* that got soft-bricked with this update. It was (somehow) poorly handled.
As for your widgets comment, well... you would've lost the bet. I use a single screen, no widgets, no weather stuff, bluetooth off, wifi on (but currently turned off), and nothing extraneous. I run Android about as light & frothy as you can get! I prefer speed over just about everything.
Any other thoughts, though? Perhaps I should re-load Autostarts to see if there's anything strange launching at boot time...

kangxi said:
Your cell standy is too high which means you have things constantly using the cell signal to pull data, thus draining your battery. Right now I'm at 72% with 67% display, 14% voice calls, and 9% cell standby. Been unplugged for 3 and a half hours.
Not great but I'm purposely trying to let it die because I'm reconditioning.
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Interesting. Any ideas what would be pinging the cell standby so much? I'm in a high-bandwidth area (full bars), so it's not like the phone is struggling to get signal. I use Gmail and Exchange, but my Exchange sync is set to "hourly", rather than push.
Doesn't seem like I'd need to disable my 3G connectivity. I certainly have never had to before.

You should probably reflash the update. JI6 was great on my phone, no hiccups, no lag, perfect GPS.
Also, you should recalibrate your battery after the update and give it a few days to settle down. I always get horrible battery life after flashing a rom, but after a few cycles I'm back up to 24h+.
Sent from my SGH-T959 using XDA App

Honestly, I wouldn't know unless I knew your full setup. What I will say is that I do have a lot of widgets and apps running that pull from the internet but yet my cell standby isn't as high as yours. I haven't reduced any of my sync intervals either. The 3G radio can really drain battery fast, faster than even the screen so that is a problem.
Also, in JI6, they increased the strength of the radio so it drains even more battery. I am running the JI6 modem however.
You should use something like WatchDog to see what is constantly running and using CPU. That could give you an indicator of problem apps.

Well, I'm disabling some startup items: Visual Voicemail, Telenav, and Daily Briefing -- none of which I use. Maybe that'll help. I don't know...
I was really trying to run "stock" this time around -- not so much fooling and tinkering with things, but it doesn't appear to be paying off for me. Frustrating.

yipcanjo said:
Well, I'm disabling some startup items: Visual Voicemail, Telenav, and Daily Briefing -- none of which I use. Maybe that'll help. I don't know...
I was really trying to run "stock" this time around -- not so much fooling and tinkering with things, but it doesn't appear to be paying off for me. Frustrating.
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Click to collapse
Oh wow, yea definitely you need to disable all of those. That's the first thing I do. I actually uninstall Visual Voicemail, Telenav, Amazon MP3 etc. ALL of those things constantly run for some reason even without you opening them once.

You're not alone. My battery life is terrible as well after the update. I'm losing 4% an hour on standby.
That said, my phone is smooth and working great when I do use it.

Yellow C6 said:
You're not alone. My battery life is terrible as well after the update. I'm losing 4% an hour on standby.
That said, my phone is smooth and working great when I do use it.
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Click to collapse
Amen to that. Except that the GPS is still unreliable.
Sent from my SGH-T959 using XDA App

I'm having terrible battery life as well.

i'm 24 hours unplugged, sitting at 27%
all stock JI6

Again, if you didn't do so after the update, wipe battery stats and then do a few full drain/charge cycles. My battery life always sucks after flashing a new ROM, but it always goes back to normal given time.
Sent from my SGH-T959 using XDA App

after the update for me, my gps is much better, but i actually have more lag then i had stock before....
so I need to either flash a kernel, lag fix, or a rom with at least one of those.... its kind of frustrating to have lag just from opening or closing a simple app, messages, or call... I honestly cant believe a phone with these hardware specs can have lag just from somthing as simple going into the dialer and exiting out...

Battery life seems to have decreased a little but still getting a good 20+ hours. GPS is a little better with use wireless networks. Lag is an issue now though. Didn't have much before a the update. Hopefully its solved in another update or froyo.
Sent from my SGH-T959 using XDA App

So I applied the update on Tuesday through Mini Kies. First experience with this update, it's been great. My phone seems to faster, really I hardly experience any kind of lag or slowdown (and this is in comparison with my stock vibrant running OCLF). Battery life even seems to be better, but that is probably to do with conditioning. So everything has been good except for the fact that my phone has froze on me TWICE today. I'm thinking it's something to do with the apps though. I was in Layar and it was working for a bit when suddenly, it froze, I didn't have to pull the battery I just held the power button down for a good 5-10 seconds and it restarted. The other time was in a game, which kind of concerns me. I suppose I can reinstall both and see how that goes. I'm thinking it has more to do with the apps possibly being corrupted. The first thing I did was install the 2.2 market on my phone and I ran the update all function on like 15 apps that needed updating. Not a good idea imo, the market went crazy and forced closed a couple of times. I'm not entirely sure what is going but it seems like my phone is only freezing in certain apps. I hope it's not just some random freeze that can happen at anytime, that wouldn't be no good.

You guys complaining about battery life... i would Love to have your times. I got 3 hours and 8 minutes today on a fully charged battery.

Yet another battery issues thread

Yeah I know there are a lot of other battery threads out there, but just wondering if I can get some help from all you gurus.
Currently running MYN Warm 2.2 RLS3 with HTC kernel 2.6.32.15.
Have read a lot about this and done a lot of the usual optimizations (calibrate battery, turn off auto sync, 4G, etc...last test I did I was able to get about 25 hours on a charge with very little usage, which is pretty decent. So the phone seems to be sleeping the way it's supposed to.
The issue I have is that when I actually start using the phone the battery drains like crazy (about 1% every two minutes). This is with regular usage (i.e. internet browsing). If I use certain battery hog features such as Navigation or Bluetooh then it drains everything in a matter of an hour or so. Have tried playing around with SetCPU and don't really see any improvements (BTW I only get three options on SetCPU).
So the question is whether the battery drainage is a function of the Kernel I'm using? Why would it be good when it's sleeping, but as soon as I use something consumption goes through the roof. Is there anything out there that would allow you to see actual battery usage by app or service? I know Spare Parts gives you SOME info, but it's not granular enough (i.e. It says Android System includes many different pieces).

I doubt there's any magical kernel that can do more than what you are getting now.
Best you can do is to make sure the phone sleeps when the screen is off, which seems like you have already.
Max display on usage I usually get out of a charge is between 2-3 hours at about 30% brightness settings, out of about 12-15 hour per charge.
I sync google, always data on.

yo i have myn's rom as well but different kernel.. try the ones that myn added in the myn update app that came with the rom

Hmmm...so I guess 2-3 hours of actual usage is the best I can hope for then? I hear people saying how they get a lot of hours and that includes having Bluetooth on, browsing the web, Pandora, gaming, etc...If I did that with mine I don't think I would get more than 45 minutes.

suarezn said:
Hmmm...so I guess 2-3 hours of actual usage is the best I can hope for then? I hear people saying how they get a lot of hours and that includes having Bluetooth on, browsing the web, Pandora, gaming, etc...If I did that with mine I don't think I would get more than 45 minutes.
Click to expand...
Click to collapse
You probably can extend it by using wifi but what's the fun in that?

Skeptron said:
yo i have myn's rom as well but different kernel.. try the ones that myn added in the myn update app that came with the rom
Click to expand...
Click to collapse
Hmmm...Where? Are you referring to the Warm Updater app? I don't see anything about other kernels there. I haven't flashed any kernels on my phone. This is the one it came with.
What battery life do you get when you're actually using the phone?
Achllles: I get quite a bit of degradation on WI-FI as well.
I'm just trying to understand if there's a way to see what exactly is eating my battery when I use the phone. I mean I could be just sitting on the screen not doing anything and if it's on it consumes quite a bit, but as soon as I turn off the screen everything goes to sleep and consumption drops to about 1% per hour. just trying to understand this huge disparity.

Not sure. Best you can do at this point is to install current widget and see how much is being consumed, and guess what's killing your battery.
One other thing I've noticed was even at same settings, my phone often consumed around 25-30mA while screen is off, but now it hovers around 50-100mA, and I haven't made any change to the phone.
Not sure if it's effect on real life usage, but it does seem like it does.

Maybe its not software related...maybe your battery is just shot already.

I know exactly what your going through OP. This caused me to leave Myns and Cyanogen and go to Fresh ROM.
This seems to have mainly fixed the problem.

Myn was using the stock kernal, but his new rsl4 is gonna be using ziggys elite kernal.. Now is this kernal gonna be faster than other ones? No but myn told me its not about speed. Its speed that makes your battery life go down. These flashy kernals that have high quadrant speeds, suffer battery draining issues. So wait till friday for the new rom, and see how that goes.

suarezn said:
Hmmm...Where? Are you referring to the Warm Updater app? I don't see anything about other kernels there. I haven't flashed any kernels on my phone. This is the one it came with.
What battery life do you get when you're actually using the phone?
Click to expand...
Click to collapse
there are 2 kernels there.. just try to look harder, i get 12-15hrs heavy use which is more than enough for me

Was never able to find these other Kernels, but I did install Netarchy Toast. Installed versions 4.19 to try Collin's Battery Tweak, but could never get that tweak to work properly (it always has a process that uses a lot of CPU). Uninstalled that and tried version 4.2 ant that seems to be working OK (without the battery tweak).
So after a lot of testing and re-testing I've come to the conclusion that my crazy battery drain only happens whenever there's a "radio" on. CPU usage is not the main culprit in my case as even overclocking it doesn't drain it much if the radios are turned off. It doesn't matter if it's WIFI, 3G or 4G, if the phone is using any of this it drains very quickly. Thus the reason it acts good whenever is sleeping.
A perfect example of this is that I used Power Amp to play music from my music library (from my SD Card). Used it for like 4 hours and it drained the battery at a very reasonable pace, then I stopped that and started playing music using Pandora. Immediately the battery started to drain at about 1% rate every two minutes or so. I've read somewhere that using WIFI instead of 3G would save battery. Didn't seem to make a difference in my case as it drained at about the same rapid pace. Now if I have both on, then it gets even crazier.
So having found the culprits the question is whether there's anything that can be done to improve this. BTW I think I have the latest PRI (1.77_003), PRL (60671) and baseband (2.15.00.09.01) versions

For those who have bad battery life...!

Some hints:
1) Flash Bi-Winning V2. Not V3 as I found the V2 has better battery, and V3 doesn't have too many advantages.
2) Keep brightness at low or medium-low. I doubt you need to ever put it on high. If you really want to be smart, use a brightness widget. (the one from curvefish works well
3) Try to have little to no widgets on homescreen. If you must have widgets, use trusted/well-reviewed ones. I installed a clock widget and it drained my battery in 9 hours.
If the above still does not work, then continue. If you are feeling you are getting great battery life, then continue. NOTICE: One major reason why people are getting poor battery life is too much tinkering. After seeing other people are getting better battery life, they try to flash new kernels/modems/roms/etc... and it turns out the new is worse than the old. Then they go and complain. SUMMARY: If you are feeling you have good battery life, then leave it. You should only worry if you do not get at least 12 hours on VERY LIGHT usage. (5 phone calls lasting 10 minutes, Checking emain every 30 minutes. Having fetch for 10 minutes, not push. No widgets, no music, no games etc...​
4) If you still do not have good battery with biwinning v2 flash the BALI UV kernel.
5) If you still do not have good battery, try other kernels. Kernel is the one that mainly controls battery.
6) Do you live in an area with poor reception? Try a modem that has good signal-getting abilities. Searching/switching drains battery.
7) If you still do not have good battery, try other roms.
8) If you still do not have good battery, then there is something seriously wrong. Either you are using the phone too heavily (gps etc...) or your battery is worn down. Get a stock replacement.
9) If you are here then just get a extended battery. There must be something wrong with your phone, so either exchange phone or get extended battery. If you do not want buldge get a 1600 or 1650 mah battery.
10) If you are here then throw your phone of a cliff and get this:
http://marginprice.amazonwebstore.com/Nokia-3390-Himalaya-Wht-Faceplate-Back/M/B001KKZQ4Y.htm
11) If you still do not get good battery live under a rock.
NOTE: EVERYONE'S battery life will vary based on usage and other factors.
That said, I am getting 30 hours usage with 50% left. 20 minutes of gaming, 8 phone calls, checking email.

YOUR tips aren't going to work for EVERYONE else.
Everyone's phone is unique, they use it differently, at different times, it depends on what YOU do.
If your gonna use your phone for HD Graphic games 24/7 its not gonna last 10 hours its common sense.
If your so worried about your battery then you know you should turn off GPS/Blue Tooth/ Turn down Brightness.
It's all common sense.
What i don't like you did was firstly, single out ONE ROM for having the best battery, depending on your usage.
Truthfully, i get 2 days of battery on CM7. I don't use my phone to play games and **** not all the time at least, text, phone, music, news , and browsing is what i use it for.
I forgot who it was i think it was Eugene who said
If you want your battery to last, treat it like your mother, not a piss poor whore.

Could also be because bi-winning v3 is still in beta while v2 is not.

xriderx66 said:
YOUR tips aren't going to work for EVERYONE else.
Everyone's phone is unique, they use it differently, at different times, it depends on what YOU do.
If your gonna use your phone for HD Graphic games 24/7 its not gonna last 10 hours its common sense.
If your so worried about your battery then you know you should turn off GPS/Blue Tooth/ Turn down Brightness.
It's all common sense.
What i don't like you did was firstly, single out ONE ROM for having the best battery, depending on your usage.
Truthfully, i get 2 days of battery on CM7. I don't use my phone to play games and **** not all the time at least, text, phone, music, news , and browsing is what i use it for.
I forgot who it was i think it was Eugene who said
If you want your battery to last, treat it like your mother, not a piss poor whore.
Click to expand...
Click to collapse
Not starting a flame war but..
Counter-Point 1) I originally stated that results will vary.
C-P 2) Some people have bad battery even with those things turned off
That's all... Goodnight!

Seriously, battery life has to be the #1 topic or complaint on every Android forum about every ROM, Kernel,or Modem. Thx for the tips krackers and everyone else who tried to find a way to conserve battery on these life sucking smartphones we have now days. Also, you're right xriderx66 "EVERY VIBRANT IS DIFFERENT" no matter how you look at it. What works for one person won't work for the other. By now we all should know the basics of batt. conservation, like what to turn off / remove and to o/c or not to o/c and of course the biggest battery drainer which is how long the screen is on or how bright u have it.
My point that I'm trying to make and that I had made on other forums (which alot of people didn't care about) its that we have these phones that could do so much but we constantly trying to conserve battery so we take the goodness out of the damm phones. I wanna have all the widgets I want running, I wanna have my brightness to 100% so I could see it well in the sun, I wanna have my bluetooth on all the time so I dont need to pull my phone out and dirty it at work. I wanna have either my wifi or data on all day cuz ant any given moment I wanna listen to Pandora, go on you-tube, or browse the web without having to switch this **** on or off, I wanna have my phone running like 95% of other Android user who don't even know what the hell a ROM or Kernel is but don't worry about tweaking this or that like we do so they enjoy their phones even though it kills their batteries.
So how do I do it??? Simple.... I went on eBay. I got three t959 batteries for $12 total (with s&h).I got a t959 battery charger for $3.50 total. I got a wall and car charger set for my phone for $5 total. Now I got a phone charger at home,work, and car. I got a battery charger for all my batteries. I got three fully charged x-tra batteries ready to swap whenever I need to (and not the 3500mah cuz I dont like my phone fat). All that for $20.50. That is how much it cost me to stop being obsessed with my battery life and to fully enjoy my phone. I think alot of you out there should think about doing the same so you're not obsessed with battery life. ENJOY YOUR PHONE PEOPLE

[GUIDE] How I got almost 3 days of battery life on my Nexus S 4G

First and foremost this guide is based around the Sprint Nexus S 4G. If you do not have the Nexus S 4G, Than this guide will probably not help you. =)
Secondly all credit goes to the wonderful people that work endlessly to make these wonderful Roms and Kernels. Without you guys Android wouldn't be what it is today!
Third: Please make a back up and use this guide at your own risk. I don't want to bare the weight of someone turning their phone into a paperweight by using this guide.
Alright, Now lets get to the fun part.
Case you've already forgotten why you're ready this topic. This is my rough how-to guide on getting easily over 2 days out of a single charge on your phone, Very much possible to push 3 or more days depending on use and other varying factors.
What you're going to need to start:
- Rooted Nexus S 4G with a custom recovery like Clockwork mod.
- Flash the following Rom http://forum.xda-developers.com/showthread.php?t=1417499
- Flash the following Kernel http://forum.xda-developers.com/showthread.php?t=1436313
-Flash the following "KL2" Radio update http://forum.xda-developers.com/showthread.php?t=1077168
After you have flashed all the above and confirmed your phone is running stable with all the default settings. Charge your phone to 100% and reboot back into recovery, and WIPE YOUR BATTERY STATS
Now. Lets begin configuring your rom and kernel!
- Install CPU MASTER FREE from the android market https://market.android.com/details?id=com.antutu.CpuMasterFree&hl=en
Set the following on CPU Master
- CPU Speed 800 MAX and 100MIN
- CPU Governor CONSERVATIVE
- and Scheduler set to CFQ
- Make sure to click apply on boot as well
- Now Install NSTOOLS from the Android market https://market.android.com/details?id=mobi.cyann.nstools&feature=search_result
Set the following on NSTOOLS
- DEEP IDLE: ENABLED
- Backlight Dimmer: ENABLED
- Make sure Backlight Notifications are left disabled. It keeps phone from idling properly.
- Leave all other settings alone and make sure to check set on boot
- Now lastly install Antutu Battery Saver from the Android Market
https://market.android.com/details?id=com.antutu.powersaver&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5hbnR1dHUucG93ZXJzYXZlciJd
Activate Battery Saver and set to level 2 battery save. Easy as that.
Basically your done! =)
If you notice your phone has a slightly worse or little to no improvement on the battery this is due to you deleting your battery stats. As you use your phone it will write new stats and you will begin to notice a difference after a few cycles. Just make sure your battery is charged when you wipe them, Let the phone run almost completely dead. Plug it up, Let it charge back to 100%, Unplug it. Rinse and repeat. Just be sure to unplug it when you notice it's fully charged even if you don't plan on going anywhere. Just let it sit and run on battery so that it calibrates the battery stats while it's idle as well.
Now as you should already know your battery life is going to heavily depend on use and SIGNAL STRENGTH. It seems a lot of people don't realize the more signal you have the longer your battery will last. If you're in an area with very low signal it can kill your phone in a matter of hours.
I have attached a screen shot of my battery life using this above method. Other settings I will mention
- WIFI ENABLED and CONNECTED
- Bluetooth and NFC DISABLED
- Automatic backlight control enabled
- Facebook notifcations, Weather and Contacts are the only things set to SYNC on my phone.
- Usage: Light to moderate. This includes a few texts throughout the day. A few phone calls, and a brief checking of facebook every now and then.
If I'm missing anything I will update this post. That is all for now. Happy modding and may this tutorial work the same wonders for you as it did me.
Also I should state that the phone finally died at around 2Days 17hrs on battery. My goal for 3 straight days was cut short after a few 30 minute phone calls and other work I had to do on the phone.
If you have any questions. Feel free to post, or PM me. I'll be here =)

cwayn1989 said:
First and foremost this guide is based around the Sprint Nexus S 4G. If you do not have the Nexus S 4G, Than this guide will probably not help you. =)
Secondly all credit goes to the wonderful people that work endlessly to make these wonderful Roms and Kernels. Without you guys Android wouldn't be what it is today!
Third: Please make a back up and use this guide at your own risk. I don't want to bare the weight of someone turning their phone into a paperweight by using this guide.
Alright, Now lets get to the fun part.
Case you've already forgotten why you're ready this topic. This is my rough how-to guide on getting easily over 2 days out of a single charge on your phone, Very much possible to push 3 or more days depending on use and other varying factors.
What you're going to need to start:
- Rooted Nexus S 4G with a custom recovery like Clockwork mod.
- Flash the following Rom http://forum.xda-developers.com/showthread.php?t=1417499
- Flash the following Kernel http://forum.xda-developers.com/showthread.php?t=1436313
-Flash the following "KL2" Radio update http://forum.xda-developers.com/showthread.php?t=1077168
After you have flashed all the above and confirmed your phone is running stable with all the default settings. Charge your phone to 100% and reboot back into recovery, and WIPE YOUR BATTERY STATS
Now. Lets begin configuring your rom and kernel!
- Install CPU MASTER FREE from the android market https://market.android.com/details?id=com.antutu.CpuMasterFree&hl=en
Set the following on CPU Master
- CPU Speed 800 MAX and 100MIN
- CPU Governor CONSERVATIVE
- and Scheduler set to CFQ
- Make sure to click apply on boot as well
- Now Install NSTOOLS from the Android market https://market.android.com/details?id=mobi.cyann.nstools&feature=search_result
Set the following on NSTOOLS
- DEEP IDLE: ENABLED
- Backlight Dimmer: ENABLED
- Make sure Backlight Notifications are left disabled. It keeps phone from idling properly.
- Leave all other settings alone and make sure to check set on boot
- Now lastly install Antutu Battery Saver from the Android Market
https://market.android.com/details?...1bGwsMSwxLDEsImNvbS5hbnR1dHUucG93ZXJzYXZlciJd
Activate Battery Saver and set to level 2 battery save. Easy as that.
Basically your done! =)
If you notice your phone has a slightly worse or little to no improvement on the battery this is due to you deleting your battery stats. As you use your phone it will write new stats and you will begin to notice a difference after a few cycles. Just make sure your battery is charged when you wipe them, Let the phone run almost completely dead. Plug it up, Let it charge back to 100%, Unplug it. Rinse and repeat. Just be sure to unplug it when you notice it's fully charged even if you don't plan on going anywhere. Just let it sit and run on battery so that it calibrates the battery stats while it's idle as well.
Now as you should already know your battery life is going to heavily depend on use and SIGNAL STRENGTH. It seems a lot of people don't realize the more signal you have the longer your battery will last. If you're in an area with very low signal it can kill your phone in a matter of hours.
I have attached a screen shot of my battery life using this above method. Other settings I will mention
- WIFI ENABLED and CONNECTED
- Bluetooth and NFC DISABLED
- Automatic backlight control enabled
- Facebook notifcations, Weather and Contacts are the only things set to SYNC on my phone.
- Usage: Light to moderate. This includes a few texts throughout the day. A few phone calls, and a brief checking of facebook every now and then.
If I'm missing anything I will update this post. That is all for now. Happy modding and may this tutorial work the same wonders for you as it did me.
Also I should state that the phone finally died at around 2Days 17hrs on battery. My goal for 3 straight days was cut short after a few 30 minute phone calls and other work I had to do on the phone.
If you have any questions. Feel free to post, or PM me. I'll be here =)
Click to expand...
Click to collapse
I thought it was the More Bars you have the more Data Kills Your Battery... but sprints 3G sucks .. some users only experience a .5kbs to 1.0 Mbs (if your lucky) ... that being said I think that's why your battery lasts longer. But then again I'm on Wifi so my battery has lasted all day ^_^ 15% left. Nfc on , Bluetooth off , screen at 50% brightness and heavy usage. Buuuut in your screen shot below your on 3G ... the 2 days.. was it always on Wifi?
- Google

What is your screen on time?
I don't use any "power-saving" apps, just AOKP Milestone 2 with Steve Garon's 1.14 kernel to run 50hrs with nearly 4hrs of screen time.
100/1100mhz, interactive governor, standard voltage, bln/bld on, wifi used whenever available. It doesn't help that my office is in a poor signal area - battery life would be much better if the signal reception bar stayed green all the time.
Sent from my Nexus S 4G using xda premium

iGoogleNexus said:
I thought it was the More Bars you have the more Data Kills Your Battery... but sprints 3G sucks .. some users only experience a .5kbs to 1.0 Mbs (if your lucky) ... that being said I think that's why your battery lasts longer. But then again I'm on Wifi so my battery has lasted all day ^_^ 15% left. Nfc on , Bluetooth off , screen at 50% brightness and heavy usage. Buuuut in your screen shot below your on 3G ... the 2 days.. was it always on Wifi?
- Google
Click to expand...
Click to collapse
Screen time out is on 30 seconds. and Wifi was connected virutally through the entire time, exception was when I visited a friends house which is why in the screenshot it does not say it's connected, However it was still active.

Braneless said:
What is your screen on time?
I don't use any "power-saving" apps, just AOKP Milestone 2 with Steve Garon's 1.14 kernel to run 50hrs with nearly 4hrs of screen time.
100/1100mhz, interactive governor, standard voltage, bln/bld on, wifi used whenever available. It doesn't help that my office is in a poor signal area - battery life would be much better if the signal reception bar stayed green all the time.
View attachment 912363View attachment 912364View attachment 912365
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
Those are very nice stats, Question, On your battery log, What are the massive drops in battery from? low signal or just heavy use on your phone?
Also I believe I'm going to go back an retry my experiment with SmartassV2 governor and On Demand. because I recently read they are better than conservative.
By all means play around with these settings and if you report back something I can approve on I will be happy to update this post and give credit to whoever finds more tricks to improving the battery life even more =)

cwayn1989 said:
Those are very nice stats, Question, On your battery log, What are the massive drops in battery from? low signal or just heavy use on your phone?
Also I believe I'm going to go back an retry my experiment with SmartassV2 governor and On Demand. because I recently read they are better than conservative.
By all means play around with these settings and if you report back something I can approve on I will be happy to update this post and give credit to whoever finds more tricks to improving the battery life even more =)
Click to expand...
Click to collapse
They're from heavy use, probably angry birds or web browsing. The poor signal usually results in much slower drain.
Sent from my Nexus S 4G using xda premium

Braneless said:
They're from heavy use, probably angry birds or web browsing. The poor signal usually results in much slower drain.
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
Not saying you're wrong, but based on past experience when I lived in an area where my phone was constantly losing and gaining signal or especially switching between Verizon (Roaming) and Sprint to find a signal, My phone would get very warm and it would cause massive battery drain.

Also in regards to the Sprints 3G speed.
Here in town where I live now, with the new KL2 radio
Edit:
I have attached screenshots of 3G speeds. It seems today when I ran the test the speeds aren't that special, I guess it all depends on network load.

Braneless said:
What is your screen on time?
Click to expand...
Click to collapse
This ^
I can get about 4-5 hrs on screen-on time a day with a full charge before it dies. I couldn't imagine spreading that amount of time over three days unless I was travelling again or something lol
Sent from my Nexus S 4G using Tapatalk

kyouko said:
This ^
I can get about 4-5 hrs on screen-on time a day with a full charge before it dies. I couldn't imagine spreading that amount of time over three days unless I was travelling again or something lol
Sent from my Nexus S 4G using Tapatalk
Click to expand...
Click to collapse
Haha yeah sorry about that guys, That could have been helpful for me to post, but I actually just now realized you could view your screen on hours by clicking it. I feel about stupid now.
After I tweak some more settings and do this little experiment again I'll be sure to actually include that, Seeing as it would have been helpful LOL

Braneless said:
What is your screen on time?
I don't use any "power-saving" apps, just AOKP Milestone 2 with Steve Garon's 1.14 kernel to run 50hrs with nearly 4hrs of screen time.
100/1100mhz, interactive governor, standard voltage, bln/bld on, wifi used whenever available. It doesn't help that my office is in a poor signal area - battery life would be much better if the signal reception bar stayed green all the time.
View attachment 912363View attachment 912364View attachment 912365
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
How do you get your phone to idle so well? I can never get the battery stats to flatline like that. Could it be due to me having BLN turned on as the OP said that causes an idle bug?

tycruickshank said:
How do you get your phone to idle so well? I can never get the battery stats to flatline like that. Could it be due to me having BLN turned on as the OP said that causes an idle bug?
Click to expand...
Click to collapse
There's a possibly you're running an app in the background that's preventing your phone from deep idling. Also try the battery saving app I mentioned in the post as well. It works wonders for some, and others don't notice difference. There's a lot of varying factors.
Have you wiped your battery stats and calibrated your battery with the method I mentioned above? Also you can check to see if your phone is deep idling by going into NSTools and clicking Idle stats.
If you see that your idle numbs are higher than your deep idle stats, Than yes, Something is preventing you're phone from doing so, and I would recommend disabling BLN and seeing if that fixes it.
It could be an issue with BLN and it may not be. My entire post is basically the steps and settings I've figured out and tweaked on my own to achieve maximum battery. I've read around and it seems some others have used BLN without any noticeable difference in battery at all. I guess it really just depends.
Also to the other post, The main reason I run my phone unclocked is basically, in use, I prefer the CPU to be at the lowest max speed possible, while remaining smooth, and I've noticed no lag at 800max, So therefor even when I'm using my phone it's still not going to be pulling as much power as if lets say I had it set to 1000 or 1100. Overclocking is great, Don't get me wrong, but unless you're doing something heavy like gaming or a sheet ton of crazy multitasking, I don't really think it's worth it. That's just my opinion though =)

So you're at home all this time? Then why go through all this trouble and handicapping of features and performance? Why not just plug it in?

jesusice said:
So you're at home all this time? Then why go through all this trouble and handicapping of features and performance? Why not just plug it in?
Click to expand...
Click to collapse
How exactly am I handicapping? I had people asking me how I was getting my battery life and wanted me to post up details on it, so I decided I would. I run an underclocked phone because like I stated in my previous post, I don't see the point in running a overclocked phone unless you're going for benchmarks or doing a lot of heavy multitasking and then by all means, Take the 5 seconds to change your max CPU speed. If you're referring to me not running BLN, That's because for some, including me it keeps your phone from idling and will cause battery drain. It works fine for some, others it doesn't. I'm SURE it's a problem on my end, but until I get it worked out I'm just leaving it off for now.
I've been learning about rooting and modding since the Sprint HTC Hero days. I'm far from a professional and will be the first to admit I'm an amateur compared to you guys, I cannot develop, I cannot code. I'm simply wrote this guide as a reference point for people wanting to get good battery life, That's why I said tweak with the settings and have fun.
The main reason I'm so ecstatic about the battery life, is up until now I've barely been able to get a days normal use out of an android phone even running custom roms and all that good stuff. Now I can actually use my phone throughout the day, Throw it on my dresser at night, and wake up the next morning with still enough charge to use it again without having to worry about plugging it up every night.

Home or not, this info can prove to be very useful depending on an individual's circumstance. I work multiple jobs and when I get home, sometimes I'm so tired I don't even bother to fiddle with my phone's charging cable and just crash on my bed. I've gotten great battery life using similar tactics (went to bed with a 13% charge once, woke up with the thing still alive and kicking), so again, some may find this extremely helpful. Good work!

zeigan said:
Home or not, this info can prove to be very useful depending on an individual's circumstance. I work multiple jobs and when I get home, sometimes I'm so tired I don't even bother to fiddle with my phone's charging cable and just crash on my bed. I've gotten great battery life using similar tactics (went to bed with a 13% charge once, woke up with the thing still alive and kicking), so again, some may find this extremely helpful. Good work!
Click to expand...
Click to collapse
Thank you kind sir. I'm glad you were able to find this poorly formatted guide useful! =D