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Samsung Galaxy S Battery Drain

Hi,
im having battery drain problems the phone wont last more than 5-6 hours send 20-30 texts listen to some music, i have turned off backgroud data and live wallpapers, im using something called advanced task killer free to kill the apps that are running, but i close them the re open the task bar and stuff like music player has reopened
ive also seen a post about which batterys are better is there a better one i can buy? my batterys a G7
any ideas ?
cheers

Stop using the task kiler and you'll probably see better battery life. Task killers have been proven more harmful than helpful on the newer versions of android so using it is pointless. Also pay attention to what you have synced and how often. tons of web apps synching will drain the battery faster, as will having the gps and wifi turned on--if you're not using them, disable them.

thanks for the reply i will remove the task manager,
auto sync is turned off and i only use email by refreshing the inbox

Come here: http://forum.xda-developers.com/showthread.php?t=884816
In short: Have you recently updated via Kies to JPY version? If so, stop using your wifi. There is a bug with wifi with this newest firmware.

hi,
i update to 2.2.1 through kies

Do you use wifi?
If yes, switch to data, battery life will be better. You should be able to get around 48h of light active usage (i mean browsing and calling and what not) with 3g data on.

i dont really use the wifi, signals really good around me, i only got the phone friday, brought it of a friend,
charged the phone fully before i went out last night about 7pm by 1.30am the phone had cut off, that was only using the facebook andriod app and sending text messages.

Than there is something terribly wrong. Do a wipe and factory reset, if you didnt after getting a device from your friend.. It seems that some application misbehaves and drains battery.
You can check it by typing *#*#info#*#* in dialer
Several options there, if there is something strange you will see it. (suggest looking into Battery history, usage statistics)

i dont know how to type in dialer sorry sounds very stupid all i have are digits

liamparker89 said:
Hi,
im having battery drain problems the phone wont last more than 5-6 hours send 20-30 texts listen to some music, i have turned off backgroud data and live wallpapers, im using something called advanced task killer free to kill the apps that are running, but i close them the re open the task bar and stuff like music player has reopened
ive also seen a post about which batterys are better is there a better one i can buy? my batterys a G7
any ideas ?
cheers
Click to expand...
Click to collapse
Have you tried reconditioning your battery yet?
http://forum.xda-developers.com/showpost.php?p=10092321&postcount=11053
From the above post:
TechnicR said:
About my battery life:
Previously I was on Darky's v5, with that the phone lasted 2-3 days with normal usage.
After flashing to v7 (with 100% battery) I also got the fast drainage problem. Here is what I did:
1) Turn OFF phone
2) Charge till it says it is FULL
3) Start in RECOVERY
4) WIPE battery stats
5) RESTART android (yes, it might already be on 98% or so)
6) USE phone heavily. Don't worry if it drops too fast. Use it till the Android system turns OFF automatically (it happens when your battery is below 1% - for me the phone was on 1% for about 40 mins. This is where it heavily myscalculated
7) PLUG IN your charger, TURN ON android and wait till it is FULLY charged again. (It is better if you don't use the phone at this charging up)
Now, after you disconnect the charger, you should still have 100% for some time (I've been using the phone for 32 mins - writing this post - and it is still on a hundred percent) and with this, I got back the 2-3 days battery life with normal usage.
Also, you should set WiFi to: "Never when plugged in" and by default I disable Data Network. But my phone is using WiFi all the time so it doesn't really matter
So to summerize this method, the key is to show the phone the battery's minimal capacity too, by using it till it is on null. Because with charging to 100% than wiping or flashing only introduces the maximum capacity to the system and the minimum is only guessed. THIS gives the faulty reportes and makes us think the phone drains too fast.
Try this method, than feel free to share your results
Sent from my GT-I9000 using Tapatalk
Click to expand...
Click to collapse
This may not be the exact case you are having, but the idea is the same. Give it a shot.

nvm, 'info' stands for '4636'

You could also use titanium backup and freeze some apps from running
Sent from my SGH-T959 using XDA App

Having the same problem
Hey, I'm having the exact same issue as the OP. Have you found a solution yet? I deleted the task killer just now, but did that work for you?
Thanks.

Same problem
hi
I have the same problem. I bought it 2-3 days ago. today i charged it full while fone was off, switched on at around 8AM my usage detail was
3g was on
gmail on sync
skype on sync
5-10 min of skype calling
5 min of normal calling
5-10 min of facebook browsing through android app
30 min of chatting on skype
at 2PM the fone was at 20% battery. My wifi and gps were off all day.
is there anything i can do to get atleast 15 hours of battery with normal use
regards
harris

If you are having issues with your battery, before you try killing tasks, changing setting and what not and especially if you are running custom ROMs, then you need to recondition your battery. The same goes for anyone who is having high drain issues.
If you follow the steps I posted from someone else's post and then find that your battery is not having issues, then start looking at your modem (if using a custom ROM or you've upgraded to new firmware).

ive done a factory restore, ive found what my usage says idle 4% the display 80%
contrast is switched right down

i know im not using any custom roms im using the firmware that you download through kies

liamparker89 said:
i know im not using any custom roms im using the firmware that you download through kies
Click to expand...
Click to collapse
still should try it first

I'd suggest posting this question in the Galaxy S general forum as you'll get a lot more responses

Same here
Data network activated (2g or 3g) phone die after 11 hours.
When data network deactivated phone die after 2 days!
I installed whatsapp, gtalk and one email account with 10 mins refresh.
I never use wifi.
Drain 7 - 8 % per hour when phone idle (Phone on with 3g data but without using it)
I really don't know how to "finger pointing" suspicion app via battery history.
BR

[Q] My phone was 100% battery 4 hours ago - now it's 45% :(

My phone was 100% battery 4 hours ago - now it's 45%
I haven't even hardly used it this morning.
This is ridiculous. Any ideas ?
Froyo 2.2 (bell i9000m)

Funkadelick said:
My phone was 100% battery 4 hours ago - now it's 45%
I haven't even hardly used it this morning.
This is ridiculous. Any ideas ?
Froyo 2.2 (bell i9000m)
Click to expand...
Click to collapse
Maybe sounds silly, but do You have 3G / HSDPA full timeturned on and/or any data eating app(s) running in the background? Usually these drains my I9000 really fast. If I take care to turn stimes 3G off (only 2G allowed) and shutting down the app(s) which run in background make my phone usable for a day.

it's 100% normal to suck so much battery life if you are constantly using 3G or WiFi or long phone calls

I know how to disable HDSPA, but how to disable 3g? :S tnahks

You are using it or something in the background is using it.
Full-on use (gaming) burns about 20% per hour in my experience. Browsing might be a little less but not much because instead of using CPU/GPU power it uses data.
The screen is the major burn, how long does battery usage say the screen has been on?
My battery drain is always pretty much exactly 20%/hour screen time + 1%/hour on time. It will deviate from this if I've played alot of music (especially streaming) since it uses power but not the screen, this drain rate will depend on the player and type of music (built-in player playing from SD card is lean, Tune-in radio streaming over 3G is a hog that heats the phone up, Slacker is in between).

bandita81 said:
Maybe sounds silly, but do You have 3G / HSDPA full timeturned on and/or any data eating app(s) running in the background? Usually these drains my I9000 really fast. If I take care to turn stimes 3G off (only 2G allowed) and shutting down the app(s) which run in background make my phone usable for a day.
Click to expand...
Click to collapse
I'm sorta new - how do you turn 3G off and turn 2G on ?
I don't have hardly anything running in the background (not that I know of)

filippm said:
I know how to disable HDSPA, but how to disable 3g? :S tnahks
Click to expand...
Click to collapse
I don't know how to disable anything lol
can I still txt with this off ?

AllGamer said:
it's 100% normal to suck so much battery life if you are constantly using 3G or WiFi or long phone calls
Click to expand...
Click to collapse
didn't use wifi - didn't make 1 phone call today at all

Could be a few reasons for that. If you've recently flashed a new firmware your battery stats may be messed up. Just run down your battery down a few times and it should sort itself out.
Maybe you turned your phone on while it was plugged in. This usually stuffs up the battery stats and can show as much as 30% extra battery when turned on that way. Always remove the charger before booting.
Also, to turn off 3g/hsdpa/data go to settings/wireless & network/network mode and select gsm only (2g). You can also download the widget '2g 3g' which will take you straight there. Also, you can uncheck 'use packet data'. This will kill all data which saves battery. I turn it back on with the widget whenever I need data again. The power button menu also has that option. I'm on 2.2.1 so it may differ if you are on 2.1.
Pretty sure you can still text with data off but may want to test it. If message fails then no. However mms send/receive won't work I think.
Sent from my GT-I9000 using XDA App

haloimplant said:
Browsing might be a little less but not much because instead of using CPU/GPU power it uses data.
Click to expand...
Click to collapse
i can do 5 to 6 hours straight of 3G browsing with screen on auto before it runs dry
3G + Screen = high power eaters
if i play 3D MMO (pocket craft) then it even less time

sxi200 said:
Could be a few reasons for that. If you've recently flashed a new firmware your battery stats may be messed up. Just run down your battery down a few times and it should sort itself out.
Maybe you turned your phone on while it was plugged in. This usually stuffs up the battery stats and can show as much as 30% extra battery when turned on that way. Always remove the charger before booting.
Also, to turn off 3g/hsdpa/data go to settings/wireless & network/network mode and select gsm only (2g). You can also download the widget '2g 3g' which will take you straight there. Also, you can uncheck 'use packet data'. This will kill all data which saves battery. I turn it back on with the widget whenever I need data again. The power button menu also has that option. I'm on 2.2.1 so it may differ if you are on 2.1.
Pretty sure you can still text with data off but may want to test it. If message fails then no. However mms send/receive won't work I think.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
I just recently upgraded to 2.2 froyo
i heard there's a battery stats trick, anyone know it ?

there's no battery stats trick . its just a logfile that's stored. nothing else. the trick you're probably talking about is calibration of the battery.
drain fully, charge to full while powered off. one or two charges like this should sort it.
Sent from another GALAXY

Hey I have a bell i9000 and I have to say that I'm extremely happy with my battery life, I've been unplugged since 9 am, its 7:30 now and my battery indicator is reading 37% with above average use (some phone calls, gaming, browsing...) I would advise you to do these things:
1) install darky's rom (9.2)
2) flash speedmod kernel 13b (very good on the battery)
3) use setcpu and set with these values, max:800mhz, min:100mhz (conservative), and add a profile for screen off with min/max @ 100 mhz and 100 priority level (don't worry, your phone will still feel snappy even @ 800mhz)
4) use a black wallpaper, since black is rendered by turning off pixels on an amoled display.
You should see some improvements, hope it helps!
Sent from my GT-I9000 using XDA App

Droid 4 battery issues...unbearable.

I spent a few hours looking through other threads, but nothing seemed to quite fit my scenario.
Stock droid 4 with the latest over the air update.
I use the phone very sparingly during the day, and my battery drains very quickly...
Usually take off the charger around 8am and battery is below 20% by 2pm.
My usage is usually one or two 5 minute calls, and probably 10mins of facebook.
Is there a good smart action I could try?
I had one that turned off the 4g while the screen was off, but it made sending picture messages unbearable...
My battery use indicator blames screen, then OS, then facebook....
I feel as if it's not reporting the culprit correctly...
Any help is much appreciated.

F3M4 said:
I spent a few hours looking through other threads, but nothing seemed to quite fit my scenario.
Stock droid 4 with the latest over the air update.
I use the phone very sparingly during the day, and my battery drains very quickly...
Usually take off the charger around 8am and battery is below 20% by 2pm.
My usage is usually one or two 5 minute calls, and probably 10mins of facebook.
Is there a good smart action I could try?
I had one that turned off the 4g while the screen was off, but it made sending picture messages unbearable...
My battery use indicator blames screen, then OS, then facebook....
I feel as if it's not reporting the culprit correctly...
Any help is much appreciated.
Click to expand...
Click to collapse
I've had similar issues, not sure what I did to cause them. When I first got the phone, 16hrs+ with what I would consider moderate usage was normal. I've flashed AOKP and the battery life is back to normal (on track for 15hrs today), but the stock rom is a disaster.
I'll let you know what I turn up (if anything), but I have a feeling I'll probably be wiping everything out since I actually like the stock ROM (plus no hw accel in ICS).
Edit: Also, how did you have a smart action turn 4G on/off? I was under the impression we can't control that at all, except via system menu. Is a downside to VZW's 4G...

I believe that was actually via the app Juicedefender.
even with it on i was still only getting about 8 hours...
I am semi interested in rooting/flashing a rom etc, but my last experience there was a disaster(thanks to a ****ty droid eris)

I disabled all widgets except for facebook, being that it's the only one I use...
The only non essential apps running all the time are battery circle, and facebook(widget i guess?)
I'm now charged to 100%, gonna see where these changes take me.

What are your settings as far as Brightness, Haptic Feedback, Screen Timeout, Vibration (Incoming Message/Call or End Call). Also, I recommend just using the FB app instead of the widget as I notice most of the widgets draw power even when the screen is off.
I am currently running Eclipse 1.3.7 w/ xrjxMod, Brightness all the way down, all vibration and haptic feedback is off. Since I am rooted I also used ROM Toolbox to adjust my scan interval to the minimum. I have the screen timeout to the max, but I always turn it off manually after use. I am constantly on either FB, XDA, txt messages or the occasional game/Netflix use and with the exception of watching a full episode or movie on Netflix, I am averaging about 6 to 8 hours on a full charge.

My battery is now sitting at 46%.
Since my last post I used the phone for 18mins of phone calls and nothing else.
The breakdown is 46% voice, 23% android OS, 12% display, 9% phone idle, 8% cell standby...
The brightness is as low as possible, haptic feedback is off, phone is set to vibrate(thats the only way I get calls)
All three location settings are on....Should I turn them all off? I dont know which are important...

I agree with azreal. Check your setting. Haptic feedback sucks up juice and unless you like it is more of an annoyance imo. There is an option for it in language and keyboard as well as in the screen menu for your soft keys.
Do you have your gmail setup to constantly sync? If its not needed un-check it in you accounts menu.
Are you leaving wifi on when your not in range of a remebered router?
If you are not in a strong 4g area set it to cdma only in your wifi and networks menu.
My opinion of apps to extend battery life is a negative one. Its an app that always runs to make things stop running???? Some work ok but most do not.
If all else fails I would suggest the eclipse rom for the d4. As long as you are safestrapped and follow directions properly you can't go wrong. In the case of a bootloop shut the phone off and reboot and you will come back to the recovery screen to try it again or go back to stock. Its nearly foolproof.
You may also want to do a battery stat wipe if your still having issues. Just discharge your phone completly, then fully charge wipe stats and completly discharge again then fully charge once more, and see if you notice a difference.
I get around 15-16hrs on stock and up to 22hrs on eclipse (varies with usage) by following these few things.
Sent from my DROID4 using Tapatalk

I have wifi permanently off...
I have 4g almost all the time.
I use a gmail, but I cannot find a way to limit it's syncing...I still want it to check for emails, I guess just not as frequently.

F3M4 said:
I have wifi permanently off...
I have 4g almost all the time.
I use a gmail, but I cannot find a way to limit it's syncing...I still want it to check for emails, I guess just not as frequently.
Click to expand...
Click to collapse
I would hazard a guess that having 4G on all the time is one of the main culprits. I leave 4G off unless I am browsing the web, forums, or something else where the extra speed is nice. I use the 4G Toggle widget from the market to turn 4G on and off. I always turn it off before hitting the power button to turn off the screen. No need for it to be sucking juice when I'm not actively using my phone.
Sent from my DROID4 using XDA

I just installed the toggle switch, I'm gonna give it a go.

To turn off the gmail sync go to accounts click on you tap the account. Then uncheck the sync box.
When you want to check your email go to the gmail app hit the menu and sync. Takes about 30 seconds extra but saves some battery.
Sent from my DROID4 using Tapatalk

I'm always skeptical when people blame gmail sync or 4G on battery issues. When the phone was new on stock, and on ICS now, I have three gmail accounts, a yahoo account, and one Exchange account all syncing in the background + 4G on 24/7 and getting around 16hrs of battery life. This was the case for weeks. Then I started having trouble with Verizon's Backup Manager, did a factory reset, and now stock battery life is ~ 8hrs, with 4G OFF
I'm thinking at the very least, there is an issue with the stock battery information panel. My feeling is it hides battery use by the stock bloatware...

podspi said:
I'm always skeptical when people blame gmail sync or 4G on battery issues. When the phone was new on stock, and on ICS now, I have three gmail accounts, a yahoo account, and one Exchange account all syncing in the background + 4G on 24/7 and getting around 16hrs of battery life. This was the case for weeks. Then I started having trouble with Verizon's Backup Manager, did a factory reset, and now stock battery life is ~ 8hrs, with 4G OFF
I'm thinking at the very least, there is an issue with the stock battery information panel. My feeling is it hides battery use by the stock bloatware...
Click to expand...
Click to collapse
I agree that there is probably more to it than just 4G or syncing. Especially where people are getting only 8 hours or so battery life. I personally have noticed definite battery savings with 4G toggled off when not in use though. I can usually still go most of the day even with it toggled on all day but with 4G off, except when I actually need it, I usually get to bed with 30% - 40% battery left as opposed to 10% - 20% left with 4G on all day.
Sent from my DROID4 using XDA

I would also turn all 3 locations off. No need to run the gps when not using navigation. I keep my 4G on as I use it frequently but I am going to try the toggle as well for the extra savings on battery when not netflixing/browsing.
Sent from my DROID4 using XDA

Yep. I'm also having big issues with my Droid 4 battery. First I thought it was the firewall. But even after uninstalling the app, the drainage is absurd. The battery drains so fast, the phone gets warm.
I don't know where to look. I read something about logcat in another thread but could't find it anymore.
My Droid 4 can work about 5 hours on one battery charge. No gps, no 4g and no wifi. If I turn on wifi, it lasts about 8 hours, so I'm suspecting that some process loops when in non WIFI mode.

If you're out of options try using an app called watchdog. It let's you see if there is an app that's draining your battery unusually fast.

Thanks for the tip. But what whatchdog should I use? There are many apps called watchdog

vmu said:
Thanks for the tip. But what whatchdog should I use? There are many apps called watchdog
Click to expand...
Click to collapse
Watchdog task manager lite (free version).

I tried that this morning. Still poor battery life on stock, but watchdog doesn't flag anything. Very weird
Oh well, I would definitely recommend AOKP for anybody having battery problems.
For me today: 4 hours 55 minutes since unplug, 80% left.
Screen time on: 50 minutes (!)
That being said, I do keep my screen on pretty low. Still, you can tell I've been using it...

Watchdog couldn't help me but. My data monitor showed that motorola.services was generating a lot of data the past few days (800+ MB :O ) and responsible for the battery drainage. I blocked it with droidwall. It's better now, but sometimes it still pops up and generates data despite the fact it's blocked.
So glad that I have an unlimited internet plan or else I was really screwed

Data battery drain

Hey everyone.
The battery life on my Ace without using data is brilliant. Even using wifi and playing games etc it can last around 2 days.
When data is turned on I can see the battery % counting down when I use Facebook or use the web browser.
This has happened on a number of ROMs I've tried, even stock based ROMs. I tend to use either on demand or smartass cpu settings.
I'm currently using Democracy 3.2 and it's having the same problems.
Has anyone else experienced this or found a way to fix it?
Sent from my GT-S5830 using xda app-developers app

Some apps that have internet permissions connect every now and then. With data on, battery will drain:
-when transferring data
-when switching edge, 3g and h
-when establishing data connection if it is ever lost.
If you got lots of apps transferring data, it can be solved by installing a firewall on a rooted phone (like droidwall).
The other thing is bad network coverage, which cannot be solved (switching too often or reestablishing data connection frecuently).
Edit: either way, data is a major battery hog when actively browsing (facebook, talpatalk, browser)

If using wifi isn't an option, some users report better battery life using 2g only

I don't think 2G would be an option for me... I've tried it before and the load speeds are far too slow for a lot of my apps to be usable.
I have noticed that the battery drains a lot when trying to establish H/2G/3G connection. I usually just turn data on only when I need it. Do you think it would be better for the battery to leave data on all day so it doesn't have to reconnect when I ask it to 10 times a day?
It seems to be the Facebook app that drains it most. Email / XDA / Dolphin doesn't impact battery quite as much.
Sent from my GT-S5830 using xda app-developers app

Constantly switching data on/off drains more battery than leaving it on all day cuz it will only use battery when transferring data, and if you're on wifi, wifi has preference.
The switching and establishing of data connection drains more battery than the screen at max brightness.

dxppxd said:
The switching and establishing of data connection drains more battery than the screen at max brightness.
Click to expand...
Click to collapse
Wow... That sucks... Is that just for Ace's? My girlfriends HTC Sensation doesn't seem to be affected by switching data on/off a few dozen times a day.
I'll give it a try today. Data is on all day and I'll see if I can squeeze a bit more juice out of it. I've also installed droidwall so that everything gets wifi access but only the stuff I use gets data access.
Thanks for your suggestions, I'll let you know how it goes :victory:

I've given it a try.
Previously I'd turn data on/off when I needed it and it would use 5-10% battery establishing connection and transferring data.
With data on all day I lost 5% in the morning establishing connection but after the transferring data throughout the day impacted the battery far less. I think it really helped that I had droidwall so there wasn't anything downloading in the background that I didn't want to. I got home at night and still had around 70% battery left.
Thanks for your help and advice guys :victory:

I'm shocked, without 3G I still only manage 1 day not 2days count yourself lucky!

I have same problem
Wifi uses less battery then data
Sent from my GT-S5830 using xda premium

nevis said:
I'm shocked, without 3G I still only manage 1 day not 2days count yourself lucky!
Click to expand...
Click to collapse
Turning data on/off a few times again I'd get about a day if I was lucky.
My phone has been on for a little over 24 hours with data on and it's on 80% right now... I've only really used 3G a couple of times but I'm not a particularly heavy user. It spends a lot of it's time locked and a asleep.

Battery Drain On s3 i19305

Hi, need some help,
I got this phone a couple of days back, its an unlocked one. Battery on the phone seems to be draining faster than i expected it to. The first time i charged it, it took 3 hours in the afternoon. By night it was 20% this was after playing games and downloading through wifi, so it seemed ok. I then put it for charge overnight. The next day it still seemed to drained by 7pm only used whats app this day, so i had to put for charge again.
Once fully charged (2 hrs) I shut off wifi, bluetooth, nfc and others. Switched off smart stay options and the display is set to lowest brightness (not auto). The wallpapers is also black so it will not drain battery. Overnight without the phone being used (only thing i set was alarm) the charge went from 89% to 78%. During the day I also find the charge still dropping pretty rapidly. I have included the screen shot of the battery from the same day. Between the first pictures there is no difference in use and still drops by 3% in 20 mins or so.
Is this a problem with the battery or is that how it is?
(Stock, no changes to rom)

Not sure if this is your specific problem - but one thing I've found that kills this phone fast is bad 4G cell reception. By default the phone runs as LTE/GSM/WCDMA (Auto) in Settings->Mobile Networks . If you are in a location with patchy (or none at all) 4G Coverage, the phone wastes an inordinate amount of juice switching to high-power mode on the cell radio searching for the elusive 4G/LTE ... Just like a 3G phone will deplete its battery extremly fast in a location with no/poor 3G connectivity (inside the 'secure' datacentres I wander into occasionally that have cell blockers, I can deplete the battery in a phone in about 3 hours just due to it constantly switching to high-power 'cell search' mode as it has no details on any cells to 'hand off' to....)
The difference is palpable... inside my office, if I have the phone on the right side of my desk closest to some windows, it will receive 'patchy' 4G and I'll go through about 60% battery over about 8-10 hours with intermittent phone use (most of the battery goes to screen time as I'm a 'fiddler' whenever I leave my desk for a coffee/break/etc...) If I place it on the left side of my desk, where the reception is much worse, it'll fall back to 3G and I'll go through about 80% battery doing nothing different...
I'm now in the habit of switching the phone to WCDMA Only when I'm going to be working in the bowels of the building, as there aint no hope of 4G there...Doing this drastically improves battery life.. Likewise if I'm stuck at home over the weekend, I leave it on WCDMA, as where I live has very patchy 4G as well and I only get it if I walk outside and down the street...
Just a possible reason for the excessive drain... at least worth trying anyway... *shrug*

adr6ian said:
Not sure if this is your specific problem - but one thing I've found that kills this phone fast is bad 4G cell reception. By default the phone runs as LTE/GSM/WCDMA (Auto) in Settings->Mobile Networks . If you are in a location with patchy (or none at all) 4G Coverage, the phone wastes an inordinate amount of juice switching to high-power mode on the cell radio searching for the elusive 4G/LTE ... Just like a 3G phone will deplete its battery extremly fast in a location with no/poor 3G connectivity (inside the 'secure' datacentres I wander into occasionally that have cell blockers, I can deplete the battery in a phone in about 3 hours just due to it constantly switching to high-power 'cell search' mode as it has no details on any cells to 'hand off' to....)
The difference is palpable... inside my office, if I have the phone on the right side of my desk closest to some windows, it will receive 'patchy' 4G and I'll go through about 60% battery over about 8-10 hours with intermittent phone use (most of the battery goes to screen time as I'm a 'fiddler' whenever I leave my desk for a coffee/break/etc...) If I place it on the left side of my desk, where the reception is much worse, it'll fall back to 3G and I'll go through about 80% battery doing nothing different...
I'm now in the habit of switching the phone to WCDMA Only when I'm going to be working in the bowels of the building, as there aint no hope of 4G there...Doing this drastically improves battery life.. Likewise if I'm stuck at home over the weekend, I leave it on WCDMA, as where I live has very patchy 4G as well and I only get it if I walk outside and down the street...
Just a possible reason for the excessive drain... at least worth trying anyway... *shrug*
Click to expand...
Click to collapse
Hi thanks for the reply. My phone does not show WCDMA in settings. It just has 2g/3g/4g/ auto OR 3g in network modes under mobile networks.

varun.k said:
Hi thanks for the reply. My phone does not show WCDMA in settings. It just has 2g/3g/4g/ auto OR 3g in network modes under mobile networks.
Click to expand...
Click to collapse
I have used an app called "Radio Switcher" to activate "gsm auto (prl)", when i open the app it seems to go into "Device info". It seems to work but "Network mode" does not seem to change.

I have uploaded the screenshots

Seems as though the system is using more battery than the screen itself.

The system seems to really take up way too much battery power. Mine is at 4%.
What are your sync settings? Especially for things like Weather, stocks, news etc. If you set them to sync every hour or so, your phone will keep running on the 3G network which will end up draining your battery.
Also, switch off motion. It's a cool feature, but it's not necessary. Same with auto-rotate.
Finally, use WiFi instead of 3G where possible. That saves battery too.
If you're rooted, download noFrills CPU control and reduce your max clock frequency on days where you won't get a charge. Phone runs well enough on 800mhz, but has a tendency to keep going at 1.4Ghz for no reason.
Otherwise, get a higher capacity battery

Snowstormzzz said:
The system seems to really take up way too much battery power. Mine is at 4%.
What are your sync settings? Especially for things like Weather, stocks, news etc. If you set them to sync every hour or so, your phone will keep running on the 3G network which will end up draining your battery.
Also, switch off motion. It's a cool feature, but it's not necessary. Same with auto-rotate.
Finally, use WiFi instead of 3G where possible. That saves battery too.
If you're rooted, download noFrills CPU control and reduce your max clock frequency on days where you won't get a charge. Phone runs well enough on 800mhz, but has a tendency to keep going at 1.4Ghz for no reason.
Otherwise, get a higher capacity battery
Click to expand...
Click to collapse
My sync is off, plus i have disabled sync for everything individuality and disabled all unwanted apps. Data service is also off, only use wi-fi. under motion only smart call is on and auto rotate us off.
I have uploaded a screen shot off after ti disable all these apps.(went to bed with 35% and was 28% in the mornin, turned wifi off before)

Will upgrading (official) phone to android 4.1.2 help (current ver is 4.1.1)? Current base band version is i9305BVALI5 i got an update on kies to i9305BVALI3. I don't think this is update to 4.1.2 is it?

I have updated to 4.1.2, and applied only gsm setting in mobile network. All apps are still disabled as before. The system still seems to be suing most amount of battery, more than the screen. I do not know what is using the system.

I have stared having the same problem a couple of days ago. Though I have sync enabled 0-24 for 3 gmail accounts, motions are on, screen auto rotate is also on. I am using nova launcher, almost all Samsung apps are frozen and most of time I am on wifi.
Now, this drain has nothing to do with the stuff I just mentioned (Enabled sync, motions...). I have all that things enabled all the time, and yes MPU and GPU are OC to 1600 and 640 MHz. But I was always getting >= 24h with ~3,5 h of screen on time. As I already mentioned, problem started a couple of days ago. Only thing which comes to my mind is that I have played with freezing / defrosting apps and I probably installed a couple of apps too. Like Beautiful Widgets and that's my main candidate to blame for this at the moment.
Though I am still not sure... Better than battery stats didn't show anything what could help. Network location locator or similar is at the top of the list of partial wake locks. But the time it hold the lock (About 25 min.) can't be the reason for such a high drain.
I have switched to HD Widgets, what I was using before (With this app one can disable auto location.) removed Beautiful Widgets, and turned off'Use wireless networks' and GPS in location services hoping it will help... So we'll see...

For me it still shows that adroid system and cell standby time is using a lot battery.

I don't get why android system and OS is using so much battery, everything is disabled. Network is on only GSM setting and i have network all the time, why is that also high? Does someone else also have the same problem?

If possible, install Better Battery Stats, maybe it will help you to identify the problem... In my case it is not of much use at the moment.
Sent from my GT-I9305 using xda premium

Strange idea: download an anti-virus and let it run.
Might as well give it a shot now, especially since AV is free.

Snowstormzzz said:
Strange idea: download an anti-virus and let it run.
Might as well give it a shot now, especially since AV is free.
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Click to collapse
I was using AVG, but i removed it thinking it could drain battery.

Sv: Battery Drain On s3 i19305
varun.k said:
I was using AVG, but i removed it thinking it could drain battery.
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I think he meant that it could be a virus that drains all the battery.
Sent from my GT-I9305 using xda app-developers app

sebbe312 said:
I think he meant that it could be a virus that drains all the battery.
Sent from my GT-I9305 using xda app-developers app
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I did an upgrade using odin to 4.1.2, the issue still remains though. The screen shots i posted is with the update.
So any virus should also be wiped out right?

varun.k said:
I did an upgrade using odin to 4.1.2, the issue still remains though. The screen shots i posted is with the update.
So any virus should also be wiped out right?
Click to expand...
Click to collapse
Anyways i tried it, does not seem to work though.

!crazy said:
If possible, install Better Battery Stats, maybe it will help you to identify the problem... In my case it is not of much use at the moment.
Sent from my GT-I9305 using xda premium
Click to expand...
Click to collapse
I have installed better battery stats, and it says that battery drain is 6% an hour at idle. I have attached the screen shots. I do not have root access to access some of its functions though.