Develop Bugs

Desire battery life

Any pointers for increasing battery life? I've disabled live wallpapers, picked a dark background, set friendfeed etc to update every 4 hours, and it's still not great. Phone is new, should I expect battery life to improve as battery gets used a bit?
Are task killers worth using? Seems to be some debate that they might actually cause more problems than they solve.
I've gone through forum and found lots of generic advice but would appreciate any ideas people have tried on the Desire.
Do I *really* need to wturn off wifi when I'm not using it? Isn't the phone smart enough to not use it when a known-network isn't present?
Cheers

From my experience i would advise against having a task killer running.
I used to have one running on my N1 and thought, "Great, i can free up memory". But you really don't need to do that with Android.
Having disabled it from running, I get to teh end of the day and I have between 75 and 85 battery, after having done a fair few phone calls, some net fun and data access.
I still have a task killer but I use it infrequently and dont have it running - i let it "kill" itself after running it.
I found they take up a good deal of battery life. But that's just my opinion.

isaw said:
From my experience i would advise against having a task killer running.
Click to expand...
Click to collapse
Of course!
The classic task killers kill services that are sleeping and do no eat battery.
A few minuts later, on some receivers ( connexion to internet, message or SMS received) these services will restart, and that's where they are eating battery.
If you hadn't killed them, they would have done that without eating battery.
Waking up and then going to sleep is really less battery-eater than restarting the whole service.
So, please forget about all these task killers or do that in a smart way. Only kill your game or the latest app you used!

Battery life will improve over the first weeks use. Needs a few charge cycles to achieve full capacity.
Although the battery life might not be as good as some other "imore ipopular" handsets at least you can buy a second reasonably cheap battery if you know you will be a couple of days away from a possible charge (camping etc).

zzleezz said:
Battery life will improve over the first weeks use. Needs a few charge cycles to achieve full capacity.
Although the battery life might not be as good as some other "imore ipopular" handsets at least you can buy a second reasonably cheap battery if you know you will be a couple of days away from a possible charge (camping etc).
Click to expand...
Click to collapse
You serious? I am guessing you're referring to the iPhone, the smartphone that is on charge more times than its off charge?
My Desire hands down beats an iPhone for battery life by almost 100% - only ever got 1 day of an iPhone at best - Desire is approaching nearly 2 days full usage, I am no lite user either.
For battery life the Desire is one, if not the best out there at the moment.

thank christ for that, i presume it improves after a couple of charges. mine was new on friday and the battery's pretty uninspiring so far...

landwomble said:
thank christ for that, i presume it improves after a couple of charges. mine was new on friday and the battery's pretty uninspiring so far...
Click to expand...
Click to collapse
My Desire has been up for 21.5 hours and has 3 bars left (according to the settings battery meter) but I've been driving around most of the day with spotify on listening to music, quite a bit of surfing, emailing, calls and a few texts.
I reckon it's probably got another 5+ hours to go yet.
My phone is quite new and battery life is starting to improve daily now.

Hmm... struggle to get more than 5 or 6 hours out if mine under relatively light usage, maybe 20 mins calls and 3 or 4 texts, if I use browser it flatten quicker still, the battery use status usually says Android OS itself has used most battery.
Hoping it will improve, at moment it is poor compared to my TD2 with a smaller battery
P.

had mine about 6 days and my battery is ver poor at the moment. however i remember thinking that about the G1 at first and it got better.
still was luck to get a full day from it. however i went to europe the other week (from uk) so turned all roaming data and syncing off and it lasted 4 days.
fingures crossed battery life increases on the desire, gor a car charger on orded fron fleabay so i should survive
i loved my G1, and found it hard to upgrade, first time thats ever happend, but wow this desire is differnt class, my wife has the iphone and is green and my 16 year old son is gutted he got the hero only 6 months ago.

Re: desire battery life
I've been running my desire for nearly two weeks now.
As usual WiFi & gps are the main culprits.
On average, I have exchange & GMAIL push on 3G all day with a bit of Facebook, sms & several min long calls without going past the three quarter mark by 5:30pm . However as soon as I switch on WiFi at home for browsing, reading news feeds, market etc, bang goes my battery!
Turn off 3G and sync and use it as a phone.......great battery life!
Sent from my HTC Desire using the XDA mobile application powered by Tapatalk

Yea not sure how you guys get good battery out of it. I have everything off, dark background, no synching due to having mobile network off (only thing setup to sync is email every 2 hours). I take a few phone calls maybe 30-40mins, do about 15 mins of surfing, 30 mins of music through headphones at low volume, and a game for 30 mins. That pretty much concludes my battery life for the day (is usually at around 20% left by the time I get home).
I find if I browse the market and download/install apps, my battery will go down very quickly.

Got my desire for a week now and it lasts me 2 days woth some movies, wifi and messaging. if i go even lighter, only messaging and calls it lasted me almost 4 days. it has great battery in my opinion, better than my old hd2 and even better then my old old diamond

Over in General we found an issue with the calendar app keeping the phone from going into sleep mode - That could be a cause for poor battery life.
The thread is here (remove spaces please):
h ttp:// f orum. xda-developers.com/showthread.php?t=666404

My Desire have no problem on battery so far tho, 1½ day with normal use is no problem. litle use i can use it around 2 days, but with alot off things running i would say for sure it works over a full working day.

Mine has been running for 20 hours now, I have mainly been calling, texting, surfing the net (mainly facebook), and playing a game a couple of times.
I'm not really sure whether this is good or not, I would rather it lasted longer than this, as it is due for a charge within the next few hours, and this is a bit of an awkward time to need to charge it. If I wasn't off work today I'd have a dead phone before I got home.
I don't like to charge mine before it tells me too, I like to think it'll improve the battery life over time? Is this right?

those batteries are not affected by memory effect. charging everytime you can is better than drain battery to 0%

HTC have said there is a software issue with battery levels hench the charging issues. Fix in the future they suggested.
Weather this effects the actual life of battery not sure.

I have just come from the HD2
At the beginning, everyone agreed that the battery life was god awful, and a month or so in everyone reported that the battery life was outstanding!
I can confirm this, to start with it wouldnt last me a day, by the end of it i could leave 3g and wifi on all day with everything running in the background and get a good 2 full days out of it!
I just received the desire yesterday, i gave it a full overnight charge and i must report that for the first charge the battery life looks very promising
I have used the phone VERY heavily even for me with about 100 texts, an hour talking, an hour on the internet and syncing every 15 mins or so and i have 2 bars of battery left, and i said, the battery is only going to get better!
You should look at power management tips for the HD2 as most of them apply, for example disabling 'automatic backlght' and setting it yourself because that alone can add about 30% to your battery life.

currently at 2 days 15 hours with 6/10 battery bars left.
i have gps/wifi/internet disabled and turn them on with the settings widgets when i want to use them. screen brightness at about 20%
the battery is great IMO

Guys could u please tell if I should when receiving my phone charge it directly (full charge) or it's better to empty it completely and then charge it ?
Thanx

[Q] Battery consumption: I need your help for a comparison

I found a very good program for my Motorola MB525 (Defy) for monitoring the battery draining from the market.
It's name is Batery Monitor Widget and it's free.
With 81% of battery it says only 7 hours and 16 minute left without doing anthing!!! The data is on and Wi-Fi connected to my home network.
Is it normal?? In the night in airplane mode after 9 hours it drain 8%-9% of battery. Again: is it normal???
If you can try this application and report your results...I think there is some application that drain my battery!!
Thanks!

Not really a comparison here, just a little story.
Yesterday i screwed up my Defy playing around with some rom. Nothing terrible, but i had no time to re-flash another rom, i had to go to work. So, i pickep up my old SE xperia x1.
After an entire day, 4-5 calls and several sms, that phone drained less than 10%. Then, last night i put the x1 in stand-by, well, that was a real stand-by, no power consumption at all.
Now i'm back to Defy, 2 hours, 15% drained...
All this just to say android is amazing but terribly hungry of power, even when the screen is off, even when airplane mode is on. I don't need a comparison to know about it
EDIT:
you said your wifi was left on, well android is hungry of data too. Even if you do nothing while wifi is on an amount of data still flows, sometimes i can see several mb downloaded by my Defy in a few hours, but no real usage by me. This also contributes, you should try to turn the wifi off or disable background data when you don't need it.

In standby (3g, sync only calendar and contacts) I have 1-1.5% battery consumption / hour. I think this is normal
With my normal usage i have some 20-40% left at the end of the day... also Ok.
WIFI on & connected will consume a lot of battery so I am not surprised.
BTW I also had an Xperia X1 and the consumption was roughly the same as the Defy... In fact more than 1-2 days on a charge I very rarely had on any of my smartphones with normal usage.

matrix866 said:
Is it normal?? In the night in airplane mode after 9 hours it drain 8%-9% of battery. Again: is it normal???
Click to expand...
Click to collapse
last week I was working in the forest for a few days with no signal at all, so I turned on airplane mode: I remember it going from 45% in the morning to 42% in the late afternoon!
(with everything turned off, just used it occasionally to have an idea of what time it was)

eiben_robert said:
In standby (3g, sync only calendar and contacts) I have 1-1.5% battery consumption / hour. I think this is normal
With my normal usage i have some 20-40% left at the end of the day... also Ok.
WIFI on & connected will consume a lot of battery so I am not surprised.
BTW I also had an Xperia X1 and the consumption was roughly the same as the Defy... In fact more than 1-2 days on a charge I very rarely had on any of my smartphones with normal usage.
Click to expand...
Click to collapse
It's ok to be an android fan, i like it too, as i said it is amazing. But, battery life is definitely NOT the strong point. I can compare the two phones now, at this moment. Honestly Defy's battery life is a lot shorter.

xdaid said:
It's ok to be an android fan, i like it too, as i said it is amazing. But, battery life is definitely NOT the strong point. I can compare the two phones now, at this moment. Honestly Defy's battery life is a lot shorter.
Click to expand...
Click to collapse
what's the other phone you compared?

I really don't have problem with Defy's battery life. As far as my memory serves, all cell phones I ever owned (7~8, all nokia, se, moto) could standby (just standby and don't use at all) for a week or made around 5 hours call. In my case Defy can also standby for a week or allow 5~6 hours usage.
I'm on a 2g network (probably helps alot), as I have wifi at home and at work. I have an exchange email, a gmail, 2 yahoo mails, and a weather app, all allowed to sync at default settings. I don't have facebook or twitter. GPS and bluetooth are enabled only when necessary (occasionally). I overclock Defy to 1000Mhz with SetVsel, and underclock to 300 when screen off. With conscious observation over some time, I find that 1% battery is consumed around every:
- 2 hours standby with wifi off; or
- 1 hour standby with wifi on; or
- 3~5 minutes usage (calls, emails, surfing,...)

thats some amazing battery life u got there abc ...what rom are u using?

hey guys, just a quick question. with which setting do you think i'll have longer battery life: 800MHz/58vsel or 1000MHz/56vsel? btw, i got my phone stable at 800MHz/45vsel
Sent from my MB525 using XDA App

Peglezn said:
thats some amazing battery life u got there abc ...what rom are u using?
Click to expand...
Click to collapse
I was using the orange 2.2, and am using the finland 2.2 now. Both have similar battery usage.
But I have uninstalled some stock applications which I don't use but keep running in background, like BlurHome.apk (with Launcherpro), InPocketService.apk, ToggleWidgets.apk (with ExtendedControls), WeatherWidget.apk (with FancyWidget), VSuiteApp.apk etc.

xdaid said:
It's ok to be an android fan, i like it too, as i said it is amazing. But, battery life is definitely NOT the strong point. I can compare the two phones now, at this moment. Honestly Defy's battery life is a lot shorter.
Click to expand...
Click to collapse
You may be right, I had the Xperia X1 something like 1 year ago.
I had until now FSC T830, HTC Hermes, HTC Diamond, Xperia X1, Samsung i7500 Galaxy (my first Android), Acer Liquid and now the Defy. As far as I remember I always had to charge every night (or every 2 nights at best)
Overall I think Android battery life is worse than Windows mobile was BUT I also have more background programs running now than I had in the WM days.
What I definitely don't like in Android battery life is lack of consistency. One week you get30-40 hours at a charge and suddenly 12 hours... Than you have to make detective work: look what new App might be the guilty one, check what's running in background, reboot and see if it happens again, factory reset, etc. I guess this is the price of freedom

Im on uk 2.2 and i get three days at a push i jus have a weather widget on sync every 3 hours.
Iv also undervolted 300/16 600/29 800/39 with setvsel on performance mode and up threshold on 99% and limit to vsel 1 when screen iz off
Im on three uk so im constonly on 3g and use no wifi etc etc with normal sms usage and a few calls through out off 1 charge
Sent from my MB525 using XDA App

thats the most i get out of mine =/

Peglezn said:
thats the most i get out of mine =/
Click to expand...
Click to collapse
There has to be something wrong in your case. I find that there seems no wifi/2g/3g connection. Could that be the problem?

I dont use 3g ..cuz its expensive in my country ..and I only turn wifi on when I need it
And that shouldnt be the case ...I think id loose a lot more battery if wi-fi would be on all the time

Very poor battery life?

Hey guys. I've been noticing a while that a lot of people on the forums get 12+ hours even on heavy web browsing, calling, apps, and texting. I usually can't get through a day of usage (probably 12 hours?) with my phone, and I carry 2 extra batteries with me. I calibrated my battery using the battery calibration app here on XDA and my screen is set on auto. I'm on Syndicate v. 1.1.1 and I use the stock battery.
It will usually last me 3-4 hours of 'heavy' usage (calls, games, texts) and maybe 5-7 hours of 'moderate' usage (when I'm at school, some texting, barely any internet usage, and a few calls)
Are there things that can 'harm' a battery? Some people say it's bad to charge a phone and use it at the same time, but I call people while its plugged in multiple times every day (probably a couple hours worth a day). Does that deteriorate the battery?
I'll post a screenshot of my battery usage tomorrow if that helps.
(note- I am a calling freak. So far I'm about 3/5 in my billing period and I've used 10,580 minutes. )

The charging and using not so much but letting it repeatedly drop low and get hot kills it
Sent from my Nexus S 4G using XDA Premium App

gtuansdiamm said:
The charging and using not so much but letting it repeatedly drop low and get hot kills it
Sent from my Nexus S 4G using XDA Premium App
Click to expand...
Click to collapse
Hmm. There are probably a few instances where I done that

brianhuangbh said:
Hey guys. I've been noticing a while that a lot of people on the forums get 12+ hours even on heavy web browsing, calling, apps, and texting. I usually can't get through a day of usage (probably 12 hours?) with my phone, and I carry 2 extra batteries with me. I calibrated my battery using the battery calibration app here on XDA and my screen is set on auto. I'm on Syndicate v. 1.1.1 and I use the stock battery.
It will usually last me 3-4 hours of 'heavy' usage (calls, games, texts) and maybe 5-7 hours of 'moderate' usage (when I'm at school, some texting, barely any internet usage, and a few calls)
Are there things that can 'harm' a battery? Some people say it's bad to charge a phone and use it at the same time, but I call people while its plugged in multiple times every day (probably a couple hours worth a day). Does that deteriorate the battery?
I'll post a screenshot of my battery usage tomorrow if that helps.
(note- I am a calling freak. So far I'm about 3/5 in my billing period and I've used 10,580 minutes. )
Click to expand...
Click to collapse
the one thing i would do to extend your battery life would probably be to take the screen setting off of auto and manually set it to the lowest brightness you can tolerate.
are you using the twilight zone 1.1.1 kernel? try using the genocide 1.0 seems to give me better mileage imho

I have noticed this even with my extended battery. I am actually going back to 1.1.0 with Vision kernel to test.

Phone calls kill this batter no matter what. Our specs for talk time is 4-6 hours I don't remember

So 3-4 hours on heavy usage is normal if I'm doing excessive calling?

Some days I have a 5 hour battery, some days I have a 20 hour battery - all depends on how I use the phone.
On the short days I use it a lot, I'm throwing attachments around in Gmail, files around in Dropbox, using 4G, and using my phone outdoors - read brightness up.
On the long days I'm using Juice Defender and Screen Filter - read brightness down - I'm mainly texting and powering the screen off asap, and getting in the occasional fb/tw check, and I'm hanging out in areas with stronger Sprint service.
My advice for elongating your battery - use Juice Defender and customise which the data controls by app. Use Screen Filter at about 60% and manual display brightness. Slide your finger left and right along the window shade to keep the brightness down. With the SAMOLED the more dark colours on the screen the longer the battery will last, so always pick dark themes on apps. If you're going to be in a low service area for a while toggle data off if it's an option.
Lastly, I picked a Zagg Sparq for this phone. I charge the Sparq in once or twice a week and then I plug my phone into it on the go on those days when I have trouble. Use the General port instead of the Optimized one. I played the multiple battery game with my G1..I prefer carrying around a juice box.

Have tried any of the "tricks" posted by Randomking?
http://forum.xda-developers.com/showthread.php?t=1106524
They seem to help me out a little.

Real world battery expectations

I usually get about 13 hours with light use with everything syncing, live background, and screen on for about 2-3 hours. What do you guys usually get?

I get a good 10 with heavy use, which is darn good for this type of phone.

About the same for me.
Sent from my SPH-D710 using XDA App

OK, this Android OS bug is bugging me. I haven't even used the phone at all and it's 11.30am and I already lost 55% battery life, took off charger at 5am. Guess the culprit...
I really don't want to flash some custom ROM or root yet when a stock ROM is not out or start from scratch reset but I like everything about this phone and came running into its embrace from a NS4G that I thought had a terrible battery and craptastic radio. This is absurd.
So perplexed at the moment...
Sent from my SPH-D710

im stock, and with little use like only 1 hr screen on time it was 54% after 16 hrs
Sent from my Samsung Galaxy S2

I've flashed to Starburst v1.5 and I have been getting 10+ hours with pretty heavy/frequent use.

Phone is sitting dormant really with just very little use. Has been off the charger since 6:30am and its not 2pm and I am at 88%.
just checking email and doing my fantasy football updates. Little web action to unsubscribe from some sites and that is about it. Definitely much better than yesterday. Rebooted and got my Android OS taking 30% of battery instead of 54% and got juicedefender running on aggressive. Seems like my battery is super good now.

Heavy use... About 12hrs. Live wallpaper, FB, maps, gps, 4G, games, etc...
Light use.. around 21hrs. I was still at 30% when I took that pic. I don't know maybe it could do 30hrs. Live wallpaper, FB, and text from time to time...
Running stock btw with no battery helper apps or juice defenders, and Im using the "Galaxy" live wallpaper. Still, even for heavy use this thing has lasted me. Very happy with the battery life.
Sent from my Epic 4G Touch using XDA app

tdavis42 said:
I usually get about 13 hours with light use with everything syncing, live background, and screen on for about 2-3 hours. What do you guys usually get?
Click to expand...
Click to collapse
Here's a way to calculate your expected usage. It isn't exactly precise but it will give you a decent estimate.
Gmail/contact/calendar sync on.
Battery consumption:
1) Screen off, wifi on - 0.5%-1% per hour.
2) Screen off, 3g on, good signal - 1% per hour.
3) Screen off, 3g on, bad signal - 1 - 10% per hour.
4) Screen on, minimal brightness, reading e-books - 1% per 8 minutes.
5) Screen on, minimal/medium brightness, web browsing/youtube - 1% per 4 minutes.
6) Screen on, minimal/medium brightness, games - 1% per 2 minutes.

Me today so far... I was at school thats why there wasnt much use for a while..
Sent from my SPH-D710 using XDA App

My phone can barley make it through a 7 hour day of streaming music and 3 of those hours airplane mode is on.. Absurd.
Sent from my SPH-D710 using XDA App

bman55 said:
My phone can barley make it through a 7 hour day of streaming music and 3 of those hours airplane mode is on.. Absurd.
Sent from my SPH-D710 using XDA App
Click to expand...
Click to collapse
Either your phone is defective, or ... Come on! I can get 6-7 hours of youtube. Streaming music with the screen off must use much less battery.
Something else is draining your battery in a big way.
In all likelihood, you are used to gsm phones, and not CDMA. With CDMA phones, having a weak signal result is a HEAVY battery drain.
So, if you signal is kinda weak, in an office or other place of work, you are likely to burn battery.
My Sprint signal is very weak at work. What I do to save battery is switch to roaming.
My secondary roaming provider has a much stronger signal. Their cell tower must be much closer..
So, the battery drain while roaming is almost as low as with Sprint with a good signal.
For CDMA phones, there's paid app in the market called Roam Control.
Using that app to switch to roaming and save battery is the only way I know...]
EDIT: Ok, I lied... I just thought a bit more about the issue.
There's another way.
You can flash a verizon PRL instead of a Sprint one. Verizon usually has a stronger (and less battery draining) signal in my area...

1% per hour at idle with no use (idle) here.
Goes up with use.
6 - 8 hours of medium duty use (web music ect)
4 hours of streaming netflix
overall compares very favorably with every android device i've ever used (starting with launch day moment (nov 2009)
this is with everything on 4g, bluetooth , gps ect. with no effort to save batt. usually in a marginal service area.

[Q] Whats your battery life like?

I haven't seen a battery life thread for the AT&T S3, so I'll start one.
Mine is around 13 hours with moderate use. I listen to podcasts for an hour in the morning (commute to work), read Pulse News and Facebook for about an hour at lunch, and listen to another hour of podcasts for the commute back home. By the time I get home, I'm around 13% life. I usually get the battery warning while listening to my podcast. In comparison, my GNex GSM gets 17 hours with the same use pattern. When I get home, I'm usually around 37%. Besides Samsung's and AT&T's bloatware, same apps, no widgets.
All told, I am very disappointed with battery life. I don't believe in underclocking my CPU in or disabling haptic feedback. I use the "Power Saver" mode, but only use the reduced screen power consumption feature (reduces framerates and brightness). WFI is always off (I don't have WIFI at work). I also disabled all of the Motion features. I disabled S-Voice (it monitors for the Hi Galaxy, and disabling also allows for a very responsive Home button).
I calculated my idle battery drain (unplugged when fully charged and not touch it) at around 4.4% per hour. That only gives 22.7 hours of standby! My Galaxy Nexus GSM can go at least 2 days (sometimes I forget to charge it at night on the weekends - also not used the phone).
Is it AT&T's LTE? Is it the Gsiff_daemon process? Is it TouchWiz? Or is it just my phone?
What's your battery life like?

You pretty much hit it right on the head. I had the extended battery from Samsung on my Gnex and could easily get 20 hours with moderate usage.
This phone despite using CM10 or AOKP with the JB kernel I never see battery life that good. I'm in the 14-15 hour range with about 3 hours of screen on time. That's with wifi off, and we don't have LTE yet. All in all, it isn't very good.
Sent from my SAMSUNG-SGH-I747 using xda premium

I average 32-38 hours with sleep and all. Usually around 8+ screen on time.
Sent from my SGH-I747 using XDA Premium HD app

JayRolla said:
I average 32-38 hours with sleep and all. Usually around 8+ screen on time.
Sent from my SGH-I747 using XDA Premium HD app
Click to expand...
Click to collapse
Stock? What features do you have turned off? Do you use WIFI exclusively? Do you turn off your data network (LTE/HSPA)? Did you turn off Sync?
I don't use WIFI, and I leave my data on (as it should be - just like I had it on my GNex). I also leave sync on. I understand that using these decrease battery life, but come on... not like this. The GNex faired very well, and it had a smaller battery. Besides LTE and an S4 (and the S4 should be more power efficient), there isn't much different between the GNex and the S3.
If I turn on the screen for 8 hours, there won't be enough for sleep time! It'll just die... if it even makes it to 8 hours...

20+ hrs with multiple accounts syncing at 1 to 2hr intervals, screen on time of average 4hrs. Heavy use. Wifi on all the time.

stock, rooted, debloated, super-aggressive power management I was getting maybe 12 hours with 2 hours screen time.
I saw you didn't believe in underclocking, but I started using Cpu Editor http://forum.xda-developers.com/showthread.php?t=1798765 and am loving it, can do 16 hours and 4 hours of screen time with no problems, will do the trick for me.

JayRolla said:
I average 32-38 hours with sleep and all. Usually around 8+ screen on time.
Sent from my SGH-I747 using XDA Premium HD app
Click to expand...
Click to collapse
That's nearly impossible. What's your setup? Fricken hate it when people post battery life without explaining what their setup is.
Sent from my SAMSUNG-SGH-I747 using xda premium

My battery life with stock battery sucked too. Att signal sucks where I leave and waste 30% battery in that alone everyday. I got the Hyperion extended battery and loving it. Currently at 70% when usually I would be at 45-50%.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

JayRolla said:
I average 32-38 hours with sleep and all. Usually around 8+ screen on time.
Sent from my SGH-I747 using XDA Premium HD app
Click to expand...
Click to collapse
I hate to be "that guy" but I have a hard time believing anything close to this is even possible. Can you show us a pic of your battery stats?

Just use cpu tuner, It has profiles for each level of battery life so it gradually slows down your cpu's. You can get performance and bat' life.
Check it out

my battery drains a lot when i'm on wifi even when my screen isn't on. I get on average 14 hours running 1.4 GHz

You have a faulty radio.
I consistently get 40+ hours off charger with 4-5 hours screen on time with a couple hours of browsing, 3-4 hours of music, texts, an hour of calls or so, playing casual games for another hour.
Stock. No hacks. No root. Disabled all unnecessary carrier and samsung apps and disabled GPS unless i need it. Auto brightness, 2 hours sync for weathereye, flipboard and gmail syncing all the time. I do mostly use Wifi at home because my signal at home is bad and that quickly drains my battery. At work my phone idles for eight hours at a 2-3 % loss with 3G on (i use my old SIM, i do not have an LTE plan, I am on Rogers Wireless).

phonex1 said:
You have a faulty radio.
I consistently get 40+ hours off charger with 4-5 hours screen on time with a couple hours of browsing, 3-4 hours of music, texts, an hour of calls or so, playing casual games for another hour.
Stock. No hacks. No root. Disabled all unnecessary carrier and samsung apps and disabled GPS unless i need it. Auto brightness, 2 hours sync for weathereye, flipboard and gmail syncing all the time. I do mostly use Wifi at home because my signal at home is bad and that quickly drains my battery. At work my phone idles for eight hours at a 2-3 % loss with 3G on (i use my old SIM, i do not have an LTE plan, I am on Rogers Wireless).
Click to expand...
Click to collapse
You consistently (or have ever got) get 40+ hours off charger with 4 to 5 hours of screen time? Do you have your phone hooked up to a car battery?

I just factory reset (wiped data and cache) the phone and installed the apps I need (maybe something was badly configured or something) - did that yesterday night. Charged it up for this morning, and now I got 18 hours and still have 17% left. Screen on time says 1:38 hours.
This is on the same stock rooted and deodexed ROM. No hotboots either, so gsiff_daemon didn't rear it's ugly head.
Also no CPU Sleeper or any of these underclocking apps. I'm happy now, but wondering wtf was causing the problem... and will it happen again (after all, this is only day one).

I'm getting about 13 hours with 5 and a half hours of screen time. Underclocked to 1.2ghz and I have my own screen off profile. Great battery in my opinion
Sent from my SAMSUNG-SGH-I747 using xda premium

Phone finally died. Just over 19 hours. Heavy use towards the end because I was downloading and installing the rest of my apps from Google Play & Amazon App Store. Was also setting the apps up ( accounts, settings, and notifications...). Final screen on time was about 2 hours.

It's only been two days since I've had the phone, I've gotten about 14 hrs with roughly 3.5 hrs screen on time. I hate when I see people with 2 days off the charger and ridiculous screen on time. If you put the phone in airplane mode and ran just the screen you probably wouldn't last 10 hrs unless it was on low brightness. I had the Razor Maxx and I could get around 30 hrs usage with 4-5 hrs talk and 6 hrs screen on and that's the best battery life I've ever gotten on any phone with real usage.
I would like to get better stand by and more screen time out of this phone without getting an extended battery.

TheFiveDots said:
You consistently (or have ever got) get 40+ hours off charger with 4 to 5 hours of screen time? Do you have your phone hooked up to a car battery?
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Nope. Stock battery. May be some of you have faulty batteries/radios/firmwares or run too much stuff at the same time.
jordant2 said:
It's only been two days since I've had the phone, I've gotten about 14 hrs with roughly 3.5 hrs screen on time. I hate when I see people with 2 days off the charger and ridiculous screen on time. If you put the phone in airplane mode and ran just the screen you probably wouldn't last 10 hrs unless it was on low brightness. I had the Razor Maxx and I could get around 30 hrs usage with 4-5 hrs talk and 6 hrs screen on and that's the best battery life I've ever gotten on any phone with real usage.
I would like to get better stand by and more screen time out of this phone without getting an extended battery.
Click to expand...
Click to collapse
No airplane mode. Cellular connection is always on even during the night. Only difference is at home i have wifi on instead of data.
Flipboard, weathereye and an appsales app syncing every 4 hours. Auto sync for google account and facebook. Automatic brightness. Almost all samsung and Rogers apps disabled (except for myaccount and a couple samsung apps) and motion disabled since i have no use for the gestures apart from being a novelty the first week.
No root. No hacks. I am actually amazed. This is the first android phone that has battery life on par with my iPhone 4 and the unparalleled smoothness. My HTC One X lagged, this never does even with a few apps installed now including games. I look at my iPhone and think "why do i still keep it? It is no longer relevant".

Ive got my UV tweaked just right on my ktoonez kernel and keeping my screen level as low as can be and I'm now practically making it to TWO days battery life! Plug in every second afternoon or evening after moderate use. Occasionally it doesn't last as long. Quite happy now. Oh and that's with this baby cranked to 1.809Ghz! But obviously tweaked to use that under strain otherwise using lower clocks and deep sleeping with 384mhz.
Got a 4200mah extended battery on way and can't wait to see how much I can squeeze out of it too.
Sent from my SGH-I747M using xda premium

My GS3 i747m lasts around 50-55 hours per charge cycle..
It is running stock Rogers GS3 ICS, not rooted, all stock. Battery is stock as well.
Not using LTE, using HSPA+ ("4G") with data turned ON with Sync turned OFF
(**NOTE: sometimes, the battery is drained due to poor reception, and the phone will use more power for the cellular signal.. In my case, my 3G connection in my area seems alright for the most part, about 1 bar less from full)
Power saving is turned ON. WiFi powersave is turned ON.
Moderated WiFi usage in 2.4ghz 802.11g-mode only.
Every night when I go to sleep, my flight mode is turned ON. (I sleep around 9-10 hours everyday, so the phone stays on flight mode for 9-10 hours a day)
In the morning, I turn the flight mode OFF.
Bluetooth, GPS both are turned OFF
Screen brightness turned 1/4 brightness
LED notification turned OFF
Also, I have a task killer killing ALL BACKGROUND SERVICES every half hour.
Without killing all the background apps, my RAM usage is around 600-700 MB out of 1.6 GB of RAM
Killing all the background apps brings the RAM usage to around 360 MB of 1.6 GB
Without killing background apps, my battery life is shortened even when the phone is on standby.
Do this, and your battery life is pretty good..