Database Users

My battery solution

I've had a very sudden and dramatic improvement in battery life and I thought that I'd post what seems to have worked for me.
I installed setCPU and set it for
768/254 on demand - main
245/245 performance screen off
368/368 performance - battery<41%
battery<101% 768/245 on demand
I installed Ultimate JuiceDefender and set it for extreme - blocking all connectivity except for a white-list
I decided that I could do a better job than the auto screen, so I installed Brightness level and I keep it generally at about 20% and then flick it up a bit if I need it.
I disabled auto rotation and now toggle the screen with a widget.
I've taken phone calls, recorded phone calls, checked email a few times, tweeted - very often using wifi which I operate using a toggle widget
I had the phone on charge all night switched off.
Disconnected it at 8.00 this morning and at 6.30 this evening, the JD widget tells me that there is still 12hrs and 28 mins of battery time left.
Considering the size of the screen and what this phone does. And considering the very poor battery life - 8hrs max I was getting before, I am far happier and the phone now becomes a practical item to have.

Whats your percentage battery left?

seems to be saying 72%
I also noticed that for the first time screen usage is less than running usage.
Screen consumption has always been the big factor on phone - and I see that is what people say on the forum, so I'm very pleased to have reduced it so well.
The Brightness level app allows a variable control whereas all the other screen controllers have seen allow you only to rotate through three or four preset brightness levels.
Brightness Level lets you do that with a widget but it also has a slide bar, which is what I was looking for

So basically you've downgraded the DHD to a level of a Nokia S40 device imo As this has been covered by many others in many other battery life related threads I'm just saying this short and simple. Just use the device as it is supposed to, enjoy the awesome features it provides at the full potential and don't get fixated on the battery life, it'll get you through the day no problem (doesn't include playing angry birds for three hours straight ) and just plug it in when you have the chance.

About battery, some tips, my battery life is around 2 days with normal usage of phone, only i dont use 3g only wi-fi:
Brightness - between 25% and 50%
When you on the internet and use native explorer for android go to "Menu-more-settings-enable plugins" and set it to "On demand"
Tupe *#*#4636*#*# - "Phone information" and set "Preffered network type" to "GSM Auto Prl"
Android Revolution HD 2.15 rom

lejars1 said:
I've had a very sudden and dramatic improvement in battery life and I thought that I'd post what seems to have worked for me.
I installed setCPU and set it for
768/254 on demand - main
245/245 performance screen off
368/368 performance - battery<41%
battery<101% 768/245 on demand
I installed Ultimate JuiceDefender and set it for extreme - blocking all connectivity except for a white-list
I decided that I could do a better job than the auto screen, so I installed Brightness level and I keep it generally at about 20% and then flick it up a bit if I need it.
I disabled auto rotation and now toggle the screen with a widget.
I've taken phone calls, recorded phone calls, checked email a few times, tweeted - very often using wifi which I operate using a toggle widget
I had the phone on charge all night switched off.
Disconnected it at 8.00 this morning and at 6.30 this evening, the JD widget tells me that there is still 12hrs and 28 mins of battery time left.
Considering the size of the screen and what this phone does. And considering the very poor battery life - 8hrs max I was getting before, I am far happier and the phone now becomes a practical item to have.
Click to expand...
Click to collapse
your on stock rom mate?
i can see that you can charge your phone while its turnd off..
i think on customized ROM like ARHD LD CORE cm7 and etc cannot charge their phone while its off because iT will BOOTup to recovery mode

Doesn't performance mode just keep the CPU clock on it's maximum? It would rather shorten the battery life than prolong it.

Why buy a smartphone and use it like a landline lol i hammer my phone and still get 10-14 hours out of it, thats fine for me, i only get 3hrs out of my laptop lol
Sent from my Desire HD using Tapatalk

Mate there is something eating your battery if u only get 8 hours battery life.
These adjustments you made are unnecessary if you find the culprit that is eating your battery, why get a phone like the dhd and run it on 20% brightness and lower the cpu to such a level.
Have you used spare parts to check your battery usage?
Im currently on 40% and my phone has been unplugged since 27 hours and I don't even have setcpu installed.
Maybe you should post details on your barret usage!
Swyped from my sexy galaxy tab

But I'm not compromising anything now. I'm completely happy with the way that the phone works for me now.
I'm actually operating the screen at 12% for most of the time - when I am not outside and it doesn't present any difficulty for me.
Obviously I would always like better battery life and I'll look for more ways to improve it.
Doesn't performance mode just keep the CPU clock on it's maximum? It would rather shorten the battery life than prolong it.
Click to expand...
Click to collapse
According to setCPU, if you set it to on demand, it will keep on scanning for required power level. Performance automatically goes to the max. Apparently on demand uses slightly more power so they advice to use performance when possible. So I set the same max/min figure and use a performance governor.

i would actually consider rooting the phone as an alternative, or getting a bigger battery. i have alot of issue with the battery life previously, but after switching rom, it actually help alot

Well it is rooted to enable JD and setcpu to work. But I haven't dared go further because I am still trying to understand the entire process - and also the way back!
I probably will eventually.
I've ordered a 1500 Mugen - and if that actually exists and if it is an improvement on the stock battery then that will advance things as well.
I'm very pleased with the improvement I have achieved so far because at least I'm able to take the thing off the tit for a full working day and use it as a real mobile phone!!

lampz said:
your on stock rom mate?
i can see that you can charge your phone while its turnd off..
i think on customized ROM like ARHD LD CORE cm7 and etc cannot charge their phone while its off because iT will BOOTup to recovery mode
Click to expand...
Click to collapse
this is only true if you're using CMW Recovery 3.x.x.x

redlinux said:
this is only true if you're using CMW Recovery 3.x.x.x
Click to expand...
Click to collapse
No, its on all versions of cwm, you can still charge your phone though, even in recovery
Sent from my Desire HD using Tapatalk

AndroHero said:
No, its on all versions of cwm, you can still charge your phone though, even in recovery
Sent from my Desire HD using Tapatalk
Click to expand...
Click to collapse
Yup2x, it's true that we can charge it very well while in recovery mode. I was referring to the situation wherein the printer reboots to recovery as soon as you plug in the charger to your DHD. Some users have reported that and they are all using 3.x.x.x.

lejars1 said:
So I set the same max/min figure and use a performance governor.
Click to expand...
Click to collapse
As far as I've understood, you will always have max frequency when performance is applied. So there is no use setting min value really as it doesn't matter.
Sent from my %s using XDA Premium App, pardon my typos.

Vispe85 said:
So basically you've downgraded the DHD to a level of a Nokia S40 device imo As this has been covered by many others in many other battery life related threads I'm just saying this short and simple. Just use the device as it is supposed to, enjoy the awesome features it provides at the full potential and don't get fixated on the battery life, it'll get you through the day no problem (doesn't include playing angry birds for three hours straight ) and just plug it in when you have the chance.
Click to expand...
Click to collapse
By far the most excellent advice. I totally agree with you.

[CM9 beta] Battery Optimization Discussion

Battery Optimization Discussion Thread
CM9 beta: Android 4.0.3 for Samsung Epic 4G​
This thread is ONLY to discuss issues related to power management and battery life on CM9 on the Epic 4G. Battery tips are regularly summarized in the official Battery Optimization Guide. Please read the guide before posting to this thread.
CM9 Discussion Threads
User Support, Questions & Answers Thread
Battery Optimization Discussion Thread
Tips & Customization Discussion Thread
Development Discussion Thread

its good practice to save battery to turn refresh interval for apps that access the web for updates such as social media, new readers, etc to manual to help save battery life as most of these apps refresh on a pretty regular interval and defiantly eat up alot of battery

If you notice especially high battery drain and recently used your GPS or Camera they can occasionally stay on with no visible signs. Also please remember the battery stats is HIGHLY inaccurate. A Phone reboot usually fixes this.
Never keep apps like Skype, IRC, etc that stay running and keep your CPU on they drain battery especially fast!
One big battery saver is to not wake your phone to just check the time. Let the CPU stay in deep-sleep as long as possible to preserve power until you actually need your phone for something.
One MAJOR thing to save power is DO NOT MESS WITH CPU SETTINGS!
Do not use 3rd party apps like Voltage Control or SetCPU or even the built in Performance settings as modifying the settings will increase the minimum clock to 200MHz which will greatly reduce battery life than NOT messing with them. This is a known issue and will be addressed in a future release!

dyehya said:
One MAJOR thing to save power is DO NOT MESS WITH CPU SETTINGS!
Do not use 3rd party apps like Voltage Control or SetCPU or even the built in Performance settings as modifying the settings will increase the minimum clock to 200MHz which will greatly reduce battery life than NOT messing with them. This is a known issue and will be addressed in a future release!
Click to expand...
Click to collapse
If you DO decide to run a custom kernel, (NOT, I repeat NOT recommended or supported by CM9 devs) I'd suggest Control Freak. I ended up with a 200mhz min, and with that app managed to get deep sleep and 100mhz back. WITH uv and some minor oc. My battery life is great.
Head on over to the app thread here: http://forum.xda-developers.com/showthread.php?t=1072403
Another thing that can save battery, Screen Filter from the Market (Play Store now I guess) can dim our screens lower than the lowest stock increment. Useful for dark environments. (Movies, night outside etc.)
This should be obvious, and has been stated already, but it bears repeating: TURN OFF DATA AND ALL OTHER MODEMS if you're not using them.
Thanks to all the devs and everyone who contributes.

YES!!! It seems a little bit more snappy or is it just me?
And thanks for the advice not to run custom kernels...

Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it.
I simply cannot believe the difference. Makes me think I'm gonna have to go out and get Juice Defender, and let it turn off data when I put the phone to sleep, it is just that dramatic.
I can call text, and play hours of games, and still have the battery have more juice remaining than it did over the same timeframe with just a call or two for usage with the data on.

tabormeister said:
Another thing that can save battery, Screen Filter from the Market (Play Store now I guess) can dim our screens lower than the lowest stock increment. Useful for dark environments. (Movies, night outside etc.)
Click to expand...
Click to collapse
Rather than installing an additional app to control brightness, why not just tweak the settings yourself?
System Settings / Display / Automatic Backlight
Check "Use custom" and set a lower Screen dim level. Use "Edit other levels..." to adjust the steps for auto brightness if you use that feature.
This is a fantastic feature if you use the phone in low light conditions.

DCRocks said:
Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it.
I simply cannot believe the difference. Makes me think I'm gonna have to go out and get Juice Defender, and let it turn off data when I put the phone to sleep, it is just that dramatic.
I can call text, and play hours of games, and still have the battery have more juice remaining than it did over the same timeframe with just a call or two for usage with the data on.
Click to expand...
Click to collapse
This first and foremost for me.
I took my phone to a basketball game the other night and turned data off. From when I left work to when I got home was about 7 hours, and I didn't plug in for another few hours later and still had some juice. Compare this to last night when I went to class and had my phone in my pocket with 4g on for a few hours, I arrived home and my phone died 15 minutes later. Total time elapsed, 3 hours 46 minutes.
Particularly 4G data is offensive in it's battery consumption.
I have also found that putting the display on Auto Brightness saps my battery. I just adjust it whenever I need to, keeping it on the lowest setting most of the day since I'm inside a lot.

The mmc_delayed_work and deleted_wake_locks are driving me crazy. I know they've been reported as "false blames," but something, whether MMC or otherwise, definitely causes seemingly unnecessary wake locks, and there is a very clear pattern between high report percentage and battery drain.
I don't mean to take away from the optimizations suggested; they're definitely useful if you're looking to stretch the battery life out longer than typical stock capability. But for many of us, something wakes the phone a little too often, and it's very difficult to debug without disabling every single application and testing one at a time.
I guess the point is, has anyone else found a better way to figure out these wake locks?

Why is awake time in Android OS always more than double the display on time? That sounds like serious wake locks. What can I do to reduce that?
Sent from my SPH-D700 using xda premium

Don't overlook the AudioOut_1 wakelock. Its my number one offender at the moment.
Minimize it by turning off screen selection sounds... System Settings / Sound / Touch sounds.
We need to figure out what the problem is with that.
On the good side, my mmc and deleted wake locks are negligible so far on beta.

Liner81 said:
Don't overlook the AudioOut_1 wakelock. Its my number one offender at the moment.
Minimize it by turning off screen selection sounds... System Settings / Sound / Touch sounds.
We need to figure out what the problem is with that.
On the good side, my mmc and deleted wake locks are negligible so far on beta.
Click to expand...
Click to collapse
Same for me. Think due to notification sounds mostly.

muyoso said:
Same for me. Think due to notification sounds mostly.
Click to expand...
Click to collapse
That's probably right. The only time I ever see that is playing music without headphones. I almost always have my phone on vibrate
Sent from my SPH-D700 using xda premium

I get 39 minutes for vbus_present in the 6 hours since unplugged.
Sent from my SPH-D700 using xda premium

Just want to say THANK YOU for this thread, and THANK YOU for such am awesome rom.
If I might be so bold to suggest, put a section on your page for "If you get worse battery life on this rom than your last rom, it may not be because of a problem with this rom, it may just be that way and there may be nothing that can be done about it because that's just the way it is."
I have had no problems with battery life, fwiw.
Sent from my SPH-D700 using XDA

"Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it."
Agreed... Right now 25%, 8 days 8 hours, 3 h 37 m awake, screen on 1 h 43 m

XXCoder said:
"Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it."
Agreed... Right now 25%, 8 days 8 hours, 3 h 37 m awake, screen on 1 h 43 m
Click to expand...
Click to collapse
8 days? Airplane mode? Or is your battery over 9000....mah?
Sent from my SPH-D700 using xda premium

XXCoder said:
"Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it."
Agreed... Right now 25%, 8 days 8 hours, 3 h 37 m awake, screen on 1 h 43 m
Click to expand...
Click to collapse
Pics or it didn't happen! And here's a battery tip. Don't install facebook or messenger. Ever.
Sent from my SPH-D700 using Tapatalk

Just spend a day with CM9 Beta 0. It's a great rom with lots of promise. Great feel and look, very fast, ICS is fantastic.
That said, the battery life is not there yet. I basically set it up the same way I set up the stock rom. Email on Exchange push notification, EVERYTHING ELSE on manual sync. On a stock rom I usually am at about 40% after 12 hours of moderate use. About 5% drop an hour. On this rom I was at 75% after 2 hours. About 12% an hour. This is with the "stock" 1800 mAh battery.
If the devs can match the battery life of stock GB I'll be back. It really is a great rom, I just can't recharge twice a day, and I'm not carrying around a 3500mAh battery in my pocket either.
Seriously, great work to all the devs who have taken it this far. Looking forward to the next couple releases.

DCRocks said:
Without a doubt, the biggest battery saver for me, is to turn off data until I want to use it.
I simply cannot believe the difference. Makes me think I'm gonna have to go out and get Juice Defender, and let it turn off data when I put the phone to sleep, it is just that dramatic.
I can call text, and play hours of games, and still have the battery have more juice remaining than it did over the same timeframe with just a call or two for usage with the data on.
Click to expand...
Click to collapse
I use JD for this and run it in extreme mode, which disables data until you physically enable it yourself (and after you enable it, it will disable again when the screen is off). Using it, I get a huge improvement in battery life, especially on CM9. It's kind of annoying having to enable it everytime you turn the screen back on, especially since it takes 4-5 seconds before data works again, but if it can give me the type of battery life it does, I am all for it. Other than the slightly noticeable lag I get compared to CM7 and other ROMs such as CleanGB (I know I can install supercharger, but I am talking pure stock CM9 here), I have no problems at all. Major props to all the developers involved for breathing new life into our OG Epics.

How to get epic battery life?

Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!

harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
Because you use the phone and the others no! I have similar battery life. I get 3 hours screen on time.
Try cyanogenmod. For me is the best rom.

Heres a few things that help me:
make sure if your on a ROM that has it to disable cell broadcasts in wireless & network settings.
In Google sync settings, uncheck everything you don't use or can manually sync. The only things I leave checked are gmail, contacts & calendar.
If you've opened maps, make sure to back all the way out of it & swipe it away from your recent tasks screen. Better yet, if you don't need it, uninstall it or use an alternative like mapquest app.
If you don't use Google talk, open it and sign out or uninstall it.
Try not to overdo it with widgets on your home screens. I mean a few is cool, but when u have 5 screens all jam packed with various widgets constantly running & syncing...
I know you said you've tried various kernels, but I honestly found that I got the best screen on time with Franco r86 kernel (just over 4hrs). I'm not a huge kernel fan so I haven't really tried others, but I was only getting just over 3 hrs on stock.
Sent from my Nexus 4 using xda app-developers app

harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
I use the greenify app to hibernate facebook and words with friends it helps somewhat on battery life

I recently discovered that if I reduce the brightness down to 50% (which is still very BRIGHT), I can get an extra 30% battery life.
Simple, and yet, effective

Turn the brightness down - even 10pct is plenty bright indoors.
Sent from my Nexus 4 using xda app-developers app

Flash matrix kernel
Sent from my 3rd Nexus 4 using Tapatalk 2

lowrider262 said:
Heres a few things that help me:
make sure if your on a ROM that has it to disable cell broadcasts in wireless & network settings.
In Google sync settings, uncheck everything you don't use or can manually sync. The only things I leave checked are gmail, contacts & calendar.
If you've opened maps, make sure to back all the way out of it & swipe it away from your recent tasks screen. Better yet, if you don't need it, uninstall it or use an alternative like mapquest app.
If you don't use Google talk, open it and sign out or uninstall it.
Try not to overdo it with widgets on your home screens. I mean a few is cool, but when u have 5 screens all jam packed with various widgets constantly running & syncing...
I know you said you've tried various kernels, but I honestly found that I got the best screen on time with Franco r86 kernel (just over 4hrs). I'm not a huge kernel fan so I haven't really tried others, but I was only getting just over 3 hrs on stock.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Thanks, I have now signed out of google talk. I only have one widget at the moment and that's the clock widget. It's annoying that everyone can get 3 or 4 hours screen on time and I only get 2

harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
Try Eugene's CPU Sleeper from the market. It turns off all but one of your cores while the screen is off to minimize cpu usage. On CM nightly with stock kernel I got 34 hours with 17% remaining and 2.5 hours screen on time til I ended up charging my phone. I run my CPU at 1350 max / 384 min.
Make sure under sound settings all the sound on touch, keypad, etc are all turned off. Each time your phone ticks a sound it uses battery. Also bright display backgrounds will use more battery.
I only sync chrome, calendar and instant upload
good luck

harro3 said:
Hey guys,
I see some people here have AMAZING battery life. Some people are getting 4+ hours screen on time with a single charge.
I only get around 2 - 2.5 hours screen on time. Which is good, but not as good as other people.
I am using the latest Paranoid Android ROM, and I have tried many different kernels but battery life is the same with all of them. I tried undervolting, still the same battery life.
All location/gps settings are OFF. The only syncing I have is Facebook syncing every 4 hours. I checked the battery stats, and everything is normal. I checked Better Battery Stats and everything is normal too, no unusual wakelocks or anything like that.
I checked my cpu bin in terminal, and it has been binned as a 'FASTER' cpu.
I have very good signal all the time. Always use WiFi, never mobile data. Bluetooth, NFC are OFF, and brightness is autobrightness.
So after all this, why am I not getting amazing battery life like others?
Thank you!
Click to expand...
Click to collapse
Clock down your device
Use conservative cpu governor or something like that,
Undervolt if necessary
Have a low brightness screen if it's possible
Sent from my Nexus 4

Flash Franco's kernel.
http://forum.xda-developers.com/showthread.php?t=2002782
Sent from my Nexus 4 using xda premium

You can also try this, it takes a few days to "learn" your routine then it supposedly starts saving battery. I'm currently in day 2 of learning mode so I don't know for sure how well it works. But it seems to be getting good reviews so far...
https://play.google.com/store/apps/details?id=com.xiam.snapdragon.app
Sent from my Nexus 4 using xda app-developers app

lowrider262 said:
You can also try this, it takes a few days to "learn" your routine then it supposedly starts saving battery. I'm currently in day 2 of learning mode so I don't know for sure how well it works. But it seems to be getting good reviews so far...
https://play.google.com/store/apps/details?id=com.xiam.snapdragon.app
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
I've read the the battery guru app does nothing for your phone whatsoever...

mrjoeltan said:
I've read the the battery guru app does nothing for your phone whatsoever...
Click to expand...
Click to collapse
It just turns radios off and shuts down syncing, nothing you can't do by yourself.
Sent from my Nexus 4 using xda app-developers app

mrjoeltan said:
I've read the the battery guru app does nothing for your phone whatsoever...
Click to expand...
Click to collapse
Well it basically learns your routines and changes your sync settings, turns WiFi on/off when needed, and various other things you could do yourself but might forget. Kinda like tasker for lazy people so in theory yes it could save you some battery.
Sent from my Nexus 4 using xda app-developers app

VoiD_Dweller said:
Try Eugene's CPU Sleeper from the market. It turns off all but one of your cores while the screen is off to minimize cpu usage. On CM nightly with stock kernel I got 34 hours with 17% remaining and 2.5 hours screen on time til I ended up charging my phone. I run my CPU at 1350 max / 384 min.
Make sure under sound settings all the sound on touch, keypad, etc are all turned off. Each time your phone ticks a sound it uses battery. Also bright display backgrounds will use more battery.
I only sync chrome, calendar and instant upload
good luck
Click to expand...
Click to collapse
All those sounds are already off, that's the first thing I do
Thanks for that app, I'll try it to see if it helps.
curtzxion said:
Clock down your device
Use conservative cpu governor or something like that,
Undervolt if necessary
Have a low brightness screen if it's possible
Sent from my Nexus 4
Click to expand...
Click to collapse
I undervolted the hell out of my phone, at one time it was a -150mv undervolt.
Brightness was on auto, I've now switched to controlling it manually to see if that helps
gravitysandwich said:
Flash Franco's kernel.
http://forum.xda-developers.com/showthread.php?t=2002782
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Tried his kernel already a few weeks ago. No real change in battery.

That seems weird
I am completely stock, and set things more or less the same with you (not syncing, no gps unless needed, on wifi all the time) and I could get over 4 hours screen on time on an 18 hours battery life. I believe this phone (chipset?) is really efficient on standby. Does your phone show that it's being kept awake much using the cpu spy app?

Same here... I'm on stock and the best i got was pretty impressive i think. 49 hours with 4 hours screen on time. I waited till the phone turned off by itself Even though i don't get that with heavier use, it's still enough to take me through a whole day which is better then my old phone
My battery saving tips:
-turn off everything you're not using (wi-fi when not at home or office/school, bluetooth, gps, low brightness indoors)
-swype away apps after you exit from them
-turn off the screen when you put it down/in your pocket etc.
-turn off google now
That is everything that i do. No sync disabling, undervolting, underclocking or other tricks

Install greenify app from playstore
Sent from my Nexus 4 using XDA Premium HD app

drbrainsol said:
My battery saving tips:
-swype away apps after you exit from them
Click to expand...
Click to collapse
That doesn't do anything. Android as a native app killer. On the other side, this would lead to more battery consumption as Android would have to initalize data the next time you open that app. IMHO leave the apps as they are, Android would take care of them and kill them when required.
lowrider262 said:
Kinda like tasker for lazy people so in theory yes it could save you some battery.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
IMO it's isn't as powerful as tasker, but it's giving some extra juice.

Poor battery life

http://i.imgur.com/HuW8tQu.png
I hardly used my device at all and in three days the battery had been reduced down to this.
I'm running stock and I'm using mkernel. What's the operating system doing when my device is idle to consume all that battery life?

Most likely location based services such as Google Now.
Sent from my Galaxy Nexus using Tapatalk 2

Battery life looks pretty good to me. Idle is not off. If you want better battery life, turn the nexus off when not in use.
Sent from my Nexus 7 using xda app-developers app

Would installing set cpu benefit me even though I run m kernel?

Macmee said:
Would installing set cpu benefit me even though I run m kernel?
Click to expand...
Click to collapse
No, and it's not recommended for this kernel. You probably have some application using the CPU. And keep in mind, that's over 3.5 days, so it's not too be worried about.
Sent from my SGH-I777 using xda premium

Not really sure what you are looking for.
Your tablet is configured differently (read: installed apps & their settings, never mind ROM & kernel differences) than the next person's, and those configuration changes alter the activity on the device and therefore the amount of power it consumes vs time. If what you observe is unacceptable to you, you need to drill down into the details to try and optimize things. But it really is impossible for anybody to guess (from a completely blind position on the other side of the internet) what might be the cause; if that is indeed anomalous consumption compared to some benchmark (pure stock, no market apps installed & a dormant gmail account?), the cause could be due to an unlimited number of different causes.
Perhaps you want to use that app BetterBatteryStats ($2.89) to find out about wake lock usage.
FWIW, my rooted stock 4.2.2 N7 grouper tab seems to discharge about 4% "overnight". Call that 10 hrs or so, so maybe I should expect 10% discharge per day while idle and unplugged. Your result seems to suggest 16%/day; but I've made no effort to dig in to things on my end of things - and besides: my results are irrelevant to yours as I no doubt use a different collection of apps than you and possibly different settings for the stock apps, too.
In my case the idle drain rate isn't a very compelling use case - I use the tablet every day, and when it is idle it is plugged into its' charger. If it should happen that it sat idle for a couple days, it's gonna be at 100% when I decide to use it.

Sv: Poor battery life
Macmee said:
http://i.imgur.com/HuW8tQu.png
I hardly used my device at all and in three days the battery had been reduced down to this.
I'm running stock and I'm using mkernel. What's the operating system doing when my device is idle to consume all that battery life?
Click to expand...
Click to collapse
And the problem is?
Around 6 days of standby, and you want to improve that?
If you want to improve that, turn off your tablet. I'm sure u can spare those 60 sec two times a day you turn on your tablet to check mail.

Keep WiFi off when not in use and you should see a great improvement. I use stock kernel and over that same time period my battery is about the same with about 3 hours screen on time. I only turn WiFi on when I'm actually using it as anything I need synced goes to my phone.
Sent from my Nexus 7 using xda premium

Try better battery stats and see what keeps your cpu from going to sleep state..With this way you can examine what drains your battery my friend.,.

Try turning off auto-sync. (Data usage settings)
Never keep wifi on when sleep (you will lose notification to chat programs, social network app notifications when sleeping)
Use wifi powersafe mode.(Wifi advance settings)
Turn off/disable unneeded background update/apps/extensions/services and flash a rom with minimal google stock apps)
Of course, check for apps that are currently consuming power if any. (App settings, internal application setting)
M kernel also defaults cpu max to 1500Mhz ; stock is 1200. M kernel also sets gpu to 446Mhz ; stock 416Mhz. Altho this numbers might seem minimal, it can affect your battery life considerably shall there be background processing or even right after you start using your device again despite minimally in your case. (Use n download trickstermod)
These might or might not help you in getting more standby time, try and experiment =>
If you are also looking for more screen on time and if you know and accept the risks, you can try undervolting the cpu, gpu and ram in trickstermod, you can also use rootdim to go lower the screen backlight further, but do not go lower than value 4/255 as that is 'off'. thankfully you can set it to not go below 4 in the in app settings before you play with it. My configuration pushed to 8hrs+ screen time without any gaming =>
Do note that li-ion/poly batteries need to drain over time for batt health reasons. They generally last longer if kept in the 20-80% range. Room temp can also affevt battery drain significantly, cold < 26C room drains the batt real fast; and so does hot rooms >34c due to temp & conductivity relationships (batt needs to suply more due to less conductivity in the circuits when hot)

Nexus 4 battery the first week

Hey guys. I'm wondering how much better the battery has gotten since the first week y'all got it, to now.
For me I'm satisfied with the battery and I've had it for 4 days. I get about 2-2.5 hours screen on time with fairly heavy internet usage, texting, etc.

Beerad875 said:
Hey guys. I'm wondering how much better the battery has gotten since the first week y'all got it, to now.
For me I'm satisfied with the battery and I've had it for 4 days. I get about 2-2.5 hours screen on time with fairly heavy internet usage, texting, etc.
Click to expand...
Click to collapse
Are you taking any measures to save battery life, like certain screen brightness, disabling of certain features or radios, undervolting or CPU/Governor changes, etc?
First thing I installed on mine ( haven't had mine a week yet ) was Battery Monitor Widger Pro, since I've used that on my past devices when I was testing out generic batteries (speaking of which the 8$ ebay 3800mAh on my Desire-Z is still kicking strong after a year).
Problem with estimates, is that they are basically just that, and the difference between browsing on mobile vs browsing on wifi or mix, and your reception quality can also have an impact on your battery. (in the end, your screen is the biggest impact).
Mine lately, say if I had it charged at 100% , it'll take about 2 hours on mobile to get to 91%, with the screen being on about 25%-35% of that time (auto-brightness), receive/send text, take out of pocket to check email or facebook notifications, and so forth. Which would normally show as screen 30%, Google services 13%, Wifi 9% (when I had it on between house and destination). Phone idle 8%, Android OS 7% etc.
The widget I mentioned earlier can basically monitor your draw from time to time and if the screen was off or on and such during those times (default interval on it if using a widget is around 10 minutes on the logging, shorter may actually impact the battery it's monitoring oddly enough)
PS: The other day when I actually drained it down to 0% it took about 5-6 hours

Beerad875 said:
Hey guys. I'm wondering how much better the battery has gotten since the first week y'all got it, to now.
For me I'm satisfied with the battery and I've had it for 4 days. I get about 2-2.5 hours screen on time with fairly heavy internet usage, texting, etc.
Click to expand...
Click to collapse
I had about 3-4.5 hours of screen time other moderate to heavy usage on my first week as I was testing it's battery life. As that I just used my phone under light to moderate usage. My brightness level is always at it's lowest but when I'm outside I turn it up to about 50%. I rarely play games on my device. I read a lot on my phone. I use my phone to record lectures in class and do a bit of homework on it. 7 months later and I'm pretty much doing the same. I have a custom kernel installed and I'm really confidence about it. I carry a external battery pack with me all the time but I hardly use. After having a custom kernel for the past 7 months I can say battery life has been relativity the same screen time wise. I learned how to manage my apps so they won't prevent my phone from sleeping to save power. Your mileage will vary depending on what you're doing on your phone and how you manage your device. Cell service is crucial to the phone. If you're in area with little to no service your device will use up more power to stay connected. This is when "Airplane mode" comes in handy.

kbeezie said:
Are you taking any measures to save battery life, like certain screen brightness, disabling of certain features or radios, undervolting or CPU/Governor changes, etc?
First thing I installed on mine ( haven't had mine a week yet ) was Battery Monitor Widger Pro, since I've used that on my past devices when I was testing out generic batteries (speaking of which the 8$ ebay 3800mAh on my Desire-Z is still kicking strong after a year).
Problem with estimates, is that they are basically just that, and the difference between browsing on mobile vs browsing on wifi or mix, and your reception quality can also have an impact on your battery. (in the end, your screen is the biggest impact).
Mine lately, say if I had it charged at 100% , it'll take about 2 hours on mobile to get to 91%, with the screen being on about 25%-35% of that time (auto-brightness), receive/send text, take out of pocket to check email or facebook notifications, and so forth. Which would normally show as screen 30%, Google services 13%, Wifi 9% (when I had it on between house and destination). Phone idle 8%, Android OS 7% etc.
The widget I mentioned earlier can basically monitor your draw from time to time and if the screen was off or on and such during those times (default interval on it if using a widget is around 10 minutes on the logging, shorter may actually impact the battery it's monitoring oddly enough)
PS: The other day when I actually drained it down to 0% it took about 5-6 hours
Click to expand...
Click to collapse
Nah. All stock, not rooted yet, auto-brightness, No auto sync. I don't get very good service at my work and I was about 28% without service during the time I was there. I would get on facebook and message people on facebook and text, surf the internet etc because it was slow. I had maybe 2 hours screen time and 8% battery life when I left work. It was probably 9 hours off the charger. Here. I'll post a screen shot after this post (On my computer right now)

Sent from my Nexus 4 using xda premium

Beerad875 said:
Nah. All stock, not rooted yet, auto-brightness, No auto sync. I don't get very good service at my work and I was about 28% without service during the time I was there. I would get on facebook and message people on facebook and text, surf the internet etc because it was slow. I had maybe 2 hours screen time and 8% battery life when I left work. It was probably 9 hours off the charger. Here. I'll post a screen shot after this post (On my computer right now)
Click to expand...
Click to collapse
One of the benefits to custom roms (though 'stock' on a nexus is well AOSP so...) is the ability to tweak that stuff to finer details, top it off with a custom kernel and can optimize even further. Just a matter of how far you want to take it.
I have a history of immediately rooting anything I get my hands on, so I tend to have very little experience with stock. But the Nexus devices are probably the only ones I could survive having stock (but rooted) as opposed to say touchWhiz on samsung.

I can say that this phone charges FAAAAAAST.

kbeezie said:
One of the benefits to custom roms (though 'stock' on a nexus is well AOSP so...) is the ability to tweak that stuff to finer details, top it off with a custom kernel and can optimize even further. Just a matter of how far you want to take it.
I have a history of immediately rooting anything I get my hands on, so I tend to have very little experience with stock. But the Nexus devices are probably the only ones I could survive having stock (but rooted) as opposed to say touchWhiz on samsung.
Click to expand...
Click to collapse
Coming from the the backflip's motoblur to the Captivate's touchwiz then onto One X's sense to AOSP.. I'm going to stay android purist from now on. I'm in love with AOSP

Beerad875 said:
Coming from the the backflip's motoblur to the Captivate's touchwiz then onto One X's sense to AOSP.. I'm going to stay android purist from now on. I'm in love with AOSP
Click to expand...
Click to collapse
At least all the available kernels work just fine with AOSP. (Francos seems to be pretty popular for battery, I prefer bricked though on both my N4 and N7).

kbeezie said:
At least all the available kernels work just fine with AOSP. (Francos seems to be pretty popular for battery, I prefer bricked though on both my N4 and N7).
Click to expand...
Click to collapse
Why do you prefer them?
So with battery monitor widget pro do I just let it run and collect data?

kbeezie said:
At least all the available kernels work just fine with AOSP. (Francos seems to be pretty popular for battery, I prefer bricked though on both my N4 and N7).
Click to expand...
Click to collapse
Guess tonight I'm going to work on getting it drained down to 0% just remembered it was my N7 that I did a full cycle on with monitoring, I haven't done so yet to the N4.
PS: I usually do a dual-graph (mV and mA), but in this screenshot you can see generally speaking with my current configuration, I tend to drain around 200-300 mA screen on, and around -20-50 with it off.
PS#2 : It only went up to the -400 or so mA on the top right because I had changed my screen brightness to about half instead of autobrightness.

Beerad875 said:
Why do you prefer them?
Click to expand...
Click to collapse
Additional options. Take for example the Bricked kernel for the N4 in my signature. This is it's feature list, it's not aimed for hardcore overclockers or such but gives you some options (The one for the Nexus 7 is a bit more configurable during the installation).
* Based upon Googles msm 3.4 source
* Various other fixes (look @ github)
* Compiled with gcc4.7.2 toolchain (linaro 09.12)
* -O3 optimized
* Snapdragon S4 & CortexA15 optimizations
* Sweep2wake
* 192Mhz min clock
* replaced qcoms hotplug binary with msm_mpdecision (IN-KERNEL, better battery life + performance)
* Extensive sysfs interface for mpdecision with all the tuneables you want (/sys/kernel/msm_mpdecision/)
* replaced the thermald binary with my IN-KERNEL solution. (/sys/kernel/msm_thermal/)
* export krait version to: /sys/kernel/debug/krait_variant
* modified ondemand governor
* Allow OC up to 1,83Ghz, faux123 (from a thermal point of view that is now SAFE)
* Fixed min cpufreq resets
* Undervolting (faux123)
* Default clocks: 384min & 1512max
Click to expand...
Click to collapse
Sweep2Wake is kind of nice too, you just slide accross the screen to turn it on without having to touch the power button (And yes your phone is still asleep doing this, it just works off interupts.)
other kernels can be a bit more involved, such as being aimed towards overclocking the CPU or GPU, or adding in extra features not normally found in stock, and so forth. I've had the best luck with Bricked and Francos'
Beerad875 said:
So with battery monitor widget pro do I just let it run and collect data?
Click to expand...
Click to collapse
Yep, if you have a widget on the home screen (I usually do 2x1 size) it'll collect every 10 mins by default. If you don't use a widget you'd have to check a box in preference to monitor without widget or it won't log times (note for example the missing 'blocks' from my history log).
---------- Post added at 11:29 PM ---------- Previous post was at 11:22 PM ----------
Speaking of battery, anyone ever gotten more than say 800mA charge on their N4? Cuz even on my old Desire-Z if I plugged it into a 2.1A charger it would actually charge up around 1300-1500mA, but with the Nexus 4 seems that even on a 2.1A port it rarely charges more than 500-600mA.
It'll probably become more accurate once I actually drain it down to 0% and have the widget record it's history from 0% to 100% since it bases a lot of it's mA estimates off that (ie: off the rate of decrease of the battery's mv since batteries typically have a certain voltage once they hit near 0% and when they're at 100%, comebine that with what it knows the battery's mA to be it can determine the charge/discharge based off that).

kbeezie said:
[/COLOR]Speaking of battery, anyone ever gotten more than say 800mA charge on their N4? Cuz even on my old Desire-Z if I plugged it into a 2.1A charger it would actually charge up around 1300-1500mA, but with the Nexus 4 seems that even on a 2.1A port it rarely charges more than 500-600mA.
It'll probably become more accurate once I actually drain it down to 0% and have the widget record it's history from 0% to 100% since it bases a lot of it's mA estimates off that (ie: off the rate of decrease of the battery's mv since batteries typically have a certain voltage once they hit near 0% and when they're at 100%, comebine that with what it knows the battery's mA to be it can determine the charge/discharge based off that).
Click to expand...
Click to collapse
I can get back to you when I figure this app out more and start using it.
What'd you say your screen on time usually was?

Beerad875 said:
I can get back to you when I figure this app out more and start using it.
What'd you say your screen on time usually was?
Click to expand...
Click to collapse
Just in the last 2 hours or so, probably 30-45 minutes. I was in the car so it wasn't coming on all that often. Since I actually have the widget on my home screen now, I'll just post an update again probably in the morning as I play with the phone some more, maybe play a game or two (I'll set a Market in the battery history before I start and after I end it).
Far as figuring it out, it's pretty easy since most of it is already set up by default once you open it. You can basically just pop a 2x1 widget on the home screen and just leave it.

My battery life has improved drastically by just sticking with one setup and letting the phone get used to it. That means keep the same rom and kernel so the phone settles in and gets used to it. After a few cycles your usage should increase.
I recommend straight CM 10.1 with Franco kernel.
Also use 2g instead of HSPA+ when you're not using data to save power.
If you're using touch control, don't, it drains more power for sure.
Undervolting helps too.
Sent from my Nexus 4 using xda app-developers app

nyyankees1237 said:
If you're using touch control, don't, it drains more power for sure.
Click to expand...
Click to collapse
Can you clarify on this, other than the power/volume there's not much else to actually control the phone with.

kbeezie said:
Can you clarify on this, other than the power/volume there's not much else to actually control the phone with.
Click to expand...
Click to collapse
The app 'touch control' , many nexus 4 owners use it to wake and lock the phone using touch gestures in place of the traditional power button. In my usage it definitely drains the battery quicker.
Sent from my GT-N5110 using xda app-developers app

nyyankees1237 said:
The app 'touch control' , many nexus 4 owners use it to wake and lock the phone using touch gestures in place of the traditional power button. In my usage it definitely drains the battery quicker.
Sent from my GT-N5110 using xda app-developers app
Click to expand...
Click to collapse
Oh you mean like Sweep2Wake in the Bricked Kernel I'm using, except that doesn't use any battery cuz that's in the kernel using interrupts rather than an app that would keep the phone awake. (course that's all it does too, wake, nothing more sophisticated than that).
But yea I didn't know about that app.

kbeezie said:
Just in the last 2 hours or so, probably 30-45 minutes. I was in the car so it wasn't coming on all that often. Since I actually have the widget on my home screen now, I'll just post an update again probably in the morning as I play with the phone some more, maybe play a game or two (I'll set a Market in the battery history before I start and after I end it).
Far as figuring it out, it's pretty easy since most of it is already set up by default once you open it. You can basically just pop a 2x1 widget on the home screen and just leave it.
Click to expand...
Click to collapse
So yeah. You should drain it then report with some screenshots.

It's at 44% right now
Sent from my Nexus 4 using XDA Premium HD app