[Q]Severe Battery Issue - Samsung Epic 4G Touch

I need to figure out exactly what's causing this battery drain. At 7PM my battery was at 100% after installing a new radio+kernel combo. I also calibrated my battery using a method I read in the Calkulin thread for his ROM. The method was as follows: After installing a new radio, rom or kernel charge the battery to 100% then physically take the battery out for 3 minutes. Boot into recovery then wipe the battery stats and dalvik cache 3 times each. Boot into Android then charge to 100%. Download a battery calibration tool use that and discharge. Anyway, I did all of this and was done by 7PM. After light use...listening to a few songs via google music...did a search using 3g...nothing too heavy. By 8:23 my battery was down to 76%. I thought this was pretty abnormal so I downloaded some extra battery tools and app watcher tools to see exactly was draining me so bad. Over the course of about 1:30 hours my battery dropped from 76% to 46%. I froze some non essential apps after checking up on them with watchdog (social hub, yahoo finance, tts service and accuweather). Decided to do a restart to see if that would help and my battery read 17%. I just noticed that it went up to 18% and it's holding steady but this is really weird...I honestly don't know what's going on and I could really use some assistance with this issue.
I forgot to post stats for the past few hours. Before I started the battery drain quest the Battery Monitor Widget said that the estimated was around -280mA. Over the course of a few hours it ranged from that to well over -600mA. After the restart it dropped to like -2mA but now it's back up in between the -400mA to -700mA range. It's slowly dropping as I type but there's no way that this is normal.

Sometimes when doing reboots messes up the battery reading. Its done that to me before. I have noticed that on ics when I flash a kernel and modem it takes me like a full day to get good battery. After I flash it my battery is pretty bad. Search for an appstore called bettery battery stats. Its on here at xda somewhere. Use that to see if your phone is sleeping properly or if an app is wakelocking your phone. Also it depends on who u ask but wiping battery stats does absoutley nothing for me. Its been said before that it doesn't work. Hope u get it straightened out.
Sent from my SPH-D710 using xda premium

thanks for the response. I've downloaded the battery stat app but I need to read up more on it to find out what the program is telling me. In your opinion what is good battery drain? I was on facebook for a second and it skyrocketed to high -600's but now it's down to about -90mA and dropping by just sitting in front of me.

musclehead84 said:
Sometimes when doing reboots messes up the battery reading. Its done that to me before. I have noticed that on ics when I flash a kernel and modem it takes me like a full day to get good battery. After I flash it my battery is pretty bad. Search for an appstore called bettery battery stats. Its on here at xda somewhere. Use that to see if your phone is sleeping properly or if an app is wakelocking your phone. Also it depends on who u ask but wiping battery stats does absoutley nothing for me. Its been said before that it doesn't work. Hope u get it straightened out.
Sent from my SPH-D710 using xda premium
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Click to collapse
Clearing battery stats does work to wipe any info the os has on the battery. Just check your battery graph in settings, boot to cwm, wipe battery stats, then look at that graph again.
I know you know your fair share of info, so no disrespect man...
Sent from a phone with kNOw CiQ kOnane...

TeamERA said:
Clearing battery stats does work to wipe any info the os has on the battery. Jus check your battery graph in settings, boot to cwm, wipe battery stats, then look at that graph again.
I know you know your fair share of info, so no disrespect man...
Sent from a phone with kNOw CiQ kOnane...
Click to expand...
Click to collapse
I think he meant wiping does nothing to actually effect the life of the battery... Which, I agree. I've never seen any benefits when I've done it on my ET our my Moment.
Wiping just resets the OS's experience with the battery. Using your phone normally for 24 hours had the exact same effect.
Sent from my SPH-D710 using XDA

things were looking up as far as battery life goes. i got rid of some programs that were hogging the cpu and i was almost to around 12 hours on a single charge with light use. however, i did a reboot at around 6pm and my battery read 45% before hand. after the reboot it read 10%. do you think it has something to do with the kernel? this is the second time a reboot has jacked up my battery.

Guys
I have been having the same problem and try lots of things but what I did not try and just found out is that my phone has a 1500mHa instead off a 1800mHa Sprint store made a mistake and placed the wrong battery inside my phone.
Maybe some of the problems you guys are having is due to that fact.
Besides opening the phone there are several app that will actually tell you which battery you have I.E. Battery Monitor

Related

Need battery advice!! -g2

Can someone please give me some advice on what to do with my battery! Only been on for about 7 hours and I'm already at 34%!! Well 33 as of now.. This is NOT normal! Only talked for about an hour total today! I always have wifi on because I don't have a data plan! -Medium usage.
-pics enclosed!
-system info/rom/kernel info!
-please help!! Thanks!
Sent from my HTC Vision using XDA Premium App
Some advice I can shed on this is having Wifi on all the time, (by all the time you mean at least 24/7), that could be a strong point why your battery life is low. Another thing is the number of apps that require data being pulled running in the background
1. Having Wifi on for the time you state is bad if you don't have a signal. Reason why is that since there is no signal for your Wifi to obtain it will continue to search and fail, search and fail which actually drains some good amount of battery being forced to repeat such a task unlike when having a steady signal it's usage becomes minimal
2. High number of data pulling apps also works the same except then have the option to change the time they pull data which can be usually found under settings/options tab
Try these out and let us know how it goes =]
xArcane1x said:
Some advice I can shed on this is having Wifi on all the time, (by all the time you mean at least 24/7), that could be a strong point why your battery life is low. Another thing is the number of apps that require data being pulled running in the background
1. Having Wifi on for the time you state is bad if you don't have a signal. Reason why is that since there is no signal for your Wifi to obtain it will continue to search and fail, search and fail which actually drains some good amount of battery being forced to repeat such a task unlike when having a steady signal it's usage becomes minimal
2. High number of data pulling apps also works the same except then have the option to change the time they pull data which can be usually found under settings/options tab
Try these out and let us know how it goes =]
Click to expand...
Click to collapse
Thanks for the info
When I have wifi on, I am always somewhere where I have wifi. I do leave it on while driving, but that's no more that a few minutes until it reconnects.
Sent from my HTC Vision using XDA Premium App
Hmmmmm
I barely noticed that you are running a custom rom. After flashing the new rom did you wipe battery stats? If not, that can actually affect battery life as all roms run differently and different data is applied to the battery stat
There are two ways to go about wiping the stats. You can boot into recovery and Wipe Dalvik Cache under the advanced settings or you can download Battery Calibration from the marketplace which in my experience is a lot easier
Battery Calibration
The instructions are inside the app on how to implement the process
I had this rom for a while but when I flashed it, I did not wipe data or anything. I decided to wipe data to give it a try and reflashed it. I charged it completely and calibrated it. I am in the process of running the battery until it dies so I can recharge it to complete the calibration process.
Sent from my HTC Vision using XDA Premium App
Be sure to post back your results and hopefully if nothing has improved I'll try again to assist you =]
Ran it last night untill it was dead and let it charge throughout the night. Testing battery life now! Will post results when at 8 hours. Would post at 7 again but I am gooing on a college visit today and won't be using it then.
Sent from my HTC Vision using XDA Premium App
DroidCell said:
Ran it last night untill it was dead and let it charge throughout the night. Testing battery life now! Will post results when at 8 hours. Would post at 7 again but I am gooing on a college visit today and won't be using it then.
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Click to collapse
DO NOT drain the battery until it dies!!! Just down to 15-20%, then charge to full, repeat a couple times. Over-discharge is not good for Li ion batteries.
People on here keep recommending it, or saying they do it. Its NOT a good idea, and proliferating this bad advice needs to stop. Draining the battery to dead is bad for the life of the battery. Also over-discharge can possibly render the battery unable to take a charge, requiring you to buy a new battery. It doesn't happen often, but its happened to a few different people on this phone, and other phones as well.
redpoint73 said:
DO NOT drain the battery until it dies!!! Just down to 15-20%, then charge to full, repeat a couple times. Over-discharge is not good for Li ion batteries.
People on here keep recommending it, or saying they do it. Its NOT a good idea, and proliferating this bad advice needs to stop. Draining the battery to dead is bad for the life of the battery. Also over-discharge can possibly render the battery unable to take a charge, requiring you to buy a new battery. It doesn't happen often, but its happened to a few different people on this phone, and other phones as well.
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Click to collapse
You seem to know a lot so i'm gonna ask ya redpoint. People say there is a built in safety zone so even when the battery is reporting as 0 it really isn't. The batteries do not allow themselves to get below a certain threshold for the reason you are explaining. Is this not true? Lots of people who know nothing of xda or cell phones in general let there phone run the whole way out for whatever reason. I would think that cell/battery manufacturers would take that into consideration.
the reason people used to tell you to drain the battery complete was based on an older battery tech that has what you would call a "memory" it needs to "memorize" it's lowest and highest point in order to calibrate the battery. Li-ions do not need that. They actually keep track of your charge cycles.
suppose it can handle 1000 cycles. on the first day, you used up 75% of your battery and put it on the charger to max. then the next day you use another 75% and do the same thing. at this point what actually happens is that the battery will count this as 1.5 cycles rather than 2 cycles. But redpoint is right.
Do NOT drain the battery completely when it's a Li-ion battery. it's old advice for old tech battery that is legit for that type of battery but not Li-ion batteries.
To calibrate your battery, you just use your phone normally. It will figure out where it is supposed to be as you use and charge it over the course of a few days.
better battery life
Notice on the graph, the screen was not on for a while though...
Sent from my HTC Vision using XDA Premium App
xsteven77x said:
You seem to know a lot so i'm gonna ask ya redpoint. People say there is a built in safety zone so even when the battery is reporting as 0 it really isn't. The batteries do not allow themselves to get below a certain threshold for the reason you are explaining. Is this not true? Lots of people who know nothing of xda or cell phones in general let there phone run the whole way out for whatever reason. I would think that cell/battery manufacturers would take that into consideration.
Click to expand...
Click to collapse
It is true that there is a built in 'safety zone' so that the battery does not drain completely to zero.
However, it is also true that this 'safety zone' can and HAS failed for some users (including some who are on these forums)
With the way that Li-Ion batteries work, and 'calibrate', there is no added benefit to draining it completely to zero. If there is no benefit, then the risk is not worth it.
DroidCell said:
Can someone please give me some advice on what to do with my battery! Only been on for about 7 hours and I'm already at 34%!! Well 33 as of now.. This is NOT normal! Only talked for about an hour total today! I always have wifi on because I don't have a data plan! -Medium usage.
-pics enclosed!
-system info/rom/kernel info!
-please help!! Thanks!
Sent from my HTC Vision using XDA Premium App
Click to expand...
Click to collapse
These ideas ran through my mind reading your post:
I. You might want to calibrate your battery. I've run into many instruction how to do this (just google the keywords: Desire Z calibrate battery), but basically the ones that do NOT require you to drain your battery to zero first, came down to this:
0. Turn Fastboot OFF!
1. Power on your Desire then connect to your Charger and Fully charge until the LED changes Green.
2. Disconnect your phone from the charger and then power off.
3. Reconnect your phone to your charger with the power off and wait for the green LED.
4. Disconnect the phone from the charger and power it on.
5. Once the phone has fully booted / ready to use ... power off again.
6. With the power off connect the phone to the charger and wait for the green LED.
7. Disconnect from the Charger then power on and use normally.
Many people seem to have greatly increased their battery life just by following those simple steps. I am currently in the process of trying it myself, but will probably need some hours before I can verify if the overall life has significantly increased.
II. You might want to install an App like "Watchdog lite" for a longterm check if you have any apps or processes, that work as a battery eater in the background.
III. if the above tips should fail, you might want to upgrade your radio and maybe also align the radio library (RIL), to match it best with your radio and ROM. But do a lot of reading and research before actually performing that task, since this is nothing for beginners and might even make things worse. This thread might be a good point to start your research.
hope that helps,
Tronar

don't get Andida battery

Definitely perform worse than original.
do you have any stats for us or examples? How long did you give this battery?
original battery lasted me about 15hr on moderate use. With Andida, it gave me 5 hours. Not sure what was wrong with it or my phone. I'm gonna try it out for a few more days. I paid 15 bucks for and I was expecting at least 1800mah from it though it was advertised at 2250mah, but from my experience it performed worse than I expected. Packaging was very nice, I feel like I paid $10 on the packaging quality, not the product. Also, the weight on Andida is lighter than the original one. That wasn't the case when I got Anker battery for my sensation.
So did you give it one full charge and one depletion? Also do you have pictures? The more information you have the better. Maybe even a screenshot showing the usage throughout the day comparing it to your original one.
im on my second day of conditioning. i used juice offender to drain the battery quick, charged overnight to 100, wiped stats, then juice offender on my way to work then i let it charge up all day (9 hours) wiped stats again. i just took it off the charge about an hour ago and im already at 88%. im running a stock bloat free rom without syncing ANYTHING. no background syncing apps installed. im going to give this one more day of conditioning. so far no good.
so far, the battery life is about the same. off the charge at 7am and I'm at 91 by 8am. all I did was listen to music through my headphones omw to work. stick to OEM. its good to have a spare though.
Sent from my SGH-T989 using xda premium
emcn84 said:
im on my second day of conditioning. i used juice offender to drain the battery quick, charged overnight to 100, wiped stats, then juice offender on my way to work then i let it charge up all day (9 hours) wiped stats again. i just took it off the charge about an hour ago and im already at 88%. im running a stock bloat free rom without syncing ANYTHING. no background syncing apps installed. im going to give this one more day of conditioning. so far no good.
Click to expand...
Click to collapse
You know that wiping stats doesn't do anything right?
Sent from my SGH-T989 using xda premium
avarize said:
You know that wiping stats doesn't do anything right?
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
elaborate.
have you used the battery calibration app to calibrate once you hit 100%?
b0ricuaguerrero said:
have you used the battery calibration app to calibrate once you hit 100%?
Click to expand...
Click to collapse
i do but i flash so much that i forget that i have it in titanium backup (over 1,000 apps). i usually do all my configurations manually. correct me if im wrong but doesnt the app only wipe the battery stats and generates a 100% battery file?
*update on the andida battery: i have plume and facebook updating every 4 hours. beautiful widgets 3 hours and 2 push gmails 1 corporate push running. did 10 mins of ebaying. tracked 12 packages on ups app. 40% screen brightness and 20 minutes of calls since 7am today. with four hours past, i am down to 62% battery. i am running the latest juggernaut rom. thank god i bought an anker slimtalk 3200 mAH power bank! at this rate i would probably get about 9-10 hours off a charge. combined with the anker slimtalk, i can probably last a full day.
just got this bad boy in the mail. bye bye andida.
Sent from my SGH-T989 using xda premium
emcn84 said:
elaborate.
Click to expand...
Click to collapse
Directly quoted from Google engineering Google+ page
"This file [batterystats.bin] is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings. That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you. It has no impact on your battery life."
avarize said:
Directly quoted from Google engineering Google+ page
"This file [batterystats.bin] is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings. That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you. It has no impact on your battery life."
Click to expand...
Click to collapse
ok with that being stated, what if i told you that i wipe the battery stats just to clear the battery settings ui so i can see a fresh charge/discharge? sometimes when i reboot on some custom roms, the battery stats will say ive been discharging for X amount of mins/hours when they were supposed to clear on the reboot. i also know that you can easily read the slope to figure out the charge/discharge time but i always start off fresh on everything. diane does prove her fact but you have to remember that im not flashing bug-free stock roms.
i have weather update every 1 hour, facebook every 30 min, 2 gmail push, a whole lot of tune in radio (1-2 hours), which use alot of network bandwidth screen on 100% text about 50 text, about an hour of surfing (i check stock alot)
also lock my clock rate to 1.51ghz running at all time except for when off, using beastmod latest version
from 6 in the morning till 9 at night i have about 5-10% left but then again i'm using seido lol sorry just wanna brag.
screen shots to show what i mean. i defiantly did not have my cell on over night. it took till about 11pm last night for juice offender to drain my battery. after that i skipped the battery stat wipe and charged the battery with the phone off. rebooted at about 6 this morning. just thought to check the stats and this is what i got. it appears that ive been on stand by for 11 hours when actually im at 100%. the second screen shot shows the battery after i wiped the stats. this is why i wipe my stats.

Very litlle battery life on my GIO

Hello all,
Am i the only one that is having problems with the battery life on the galaxy gio?
I charged the phone today at 5 in the afternoon, by 8(3 hours after) 70% of battery, charged it with the wall charger and i rebooted it when the battery was full to close all tasks.
In 3 hours without any wifi, only 1 sms received, no calls and no other tasks was executed i lost 30%.
What can i do to improve the battery?
Are you experiencing any similar problems?
Coiso said:
Hello all,
Am i the only one that is having problems with the battery life on the galaxy gio?
I charged the phone today at 5 in the afternoon, by 8(3 hours after) 70% of battery, charged it with the wall charger and i rebooted it when the battery was full to close all tasks.
In 3 hours without any wifi, only 1 sms received, no calls and no other tasks was executed i lost 30%.
What can i do to improve the battery?
Are you experiencing any similar problems?
Click to expand...
Click to collapse
You can wipe battery stats, and turn things like gps wifi data autosync unused apps etc off, for some things you need root acces
Sent from my GT-S5660 using xda premium
What rom you have ?
I have problems with battery life too...but because i play games. Is weird because you didn't do nothing like browsing or play games and your battery was eaten.
Try a full wipe.
Also search the market for PowerTutor, it might be able to help finding what eats your battery, as what you describe this is not normal.
If you've rooted your phone you can calibrate your battery. There's an app for this in the market. It just wipes the battery stats file and creates a new one. I've head that it is good with every rom change to calibrate the battery Hope this helps! GL!
Actually it's good to flash every new ROM when you have fully charged battery. If you fail to do this you'll have to calibrate the battery and it might not be easy to do right the first time.
SO much easier to flash having full power
Battery stats wiping
IIRC google denied that battery stats wiping would actually increase the battery life: http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
I assume, you have things like WiFi, BT or GPS turned off... Then you maybe might try another launcher. Samsung's TouchWiz is quite a power eater.
nvlty said:
IIRC google denied that battery stats wiping would actually increase the battery life: http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
Click to expand...
Click to collapse
It won't increase battery life, true, but think - when you unplug the charger? When your phone says "100% charged", right? And if your battery starts are wrong the phone may say "I'm charged" when it's actually, say, 40% charged or whatever.
Wiping stats should also provide more accurate battery indicator when it gathers new stats after some usage.
JustVass said:
It won't increase battery life, true, but think - when you unplug the charger? When your phone says "100% charged", right? And if your battery starts are wrong the phone may say "I'm charged" when it's actually, say, 40% charged or whatever.
Wiping stats should also provide more accurate battery indicator when it gathers new stats after some usage.
Click to expand...
Click to collapse
In my experience the battery indicator may work a bit odd (e.g. it goes fast to 40% then stays there for ages). But it didn't keep the battery from charging to full, even when it indicated 100% it still kept charging. But to stay in the topic, clearing the stats might help the "dropping by 30% really fast" issue
Yup, that's what I was talking about - wiping stats won't improve battery life, but might fix indicator accuracy
It could be your background applications eat too much mobile data. Check out your background applications and disable them. Stick with 2G also it improves battery life a lot
if the phone and battery are ok, and you don't have Wifi/BT/3G/EDGE/max_screen_brightness/ or high CPU usage background apps, you should get something like in the attached picture:
AT least for me CM7.2 really improved battery life up to 2 (TWO) days!
Unfortunately CM9 ruined this again and brought it back for ~8h...
esilviu said:
if the phone and battery are ok, and you don't have Wifi/BT/3G/EDGE/max_screen_brightness/ or high CPU usage background apps, you should get something like in the attached picture:
Click to expand...
Click to collapse
The z stands for days??
Sent from my GT-S5660 using xda premium
voetbalremco said:
The z stands for days??
Sent from my GT-S5660 using xda premium
Click to expand...
Click to collapse
Yes, is romanian language
SilviuMik said:
Yes, is romanian language
Click to expand...
Click to collapse
Oh ok..
Z means day, sounds logically.
In dutch we call it 'dag'
Thats kinda good battery life, but also without nearly using your phone
Sent from my GT-S5660 using xda premium
You can use CM 7.2 http://forum.xda-developers.com/showthread.php?t=1381355
It is stable and saves battery better than stock rom.
Another thing to check is that Wifi is set to disable when the screen turns off or when plugged in... If not, you can loose 50% battery life in 6 hours. (Which i did once. NOT FUN.)
As well, apps that sync in the background. Ie, mail checking your inbox every hour for new mail; facebook, twitter, myspace checking for new notifications every hour; leaving apps using GPS running in the background like Navigation, My Tracks, etc. Those sorts of things can drain a battery really quickly, beacuse it has to wake up the phone, get the phone to get the required data over the cellular network then go back to sleep again, instead of just letting the phone sleep.
Another thing you can do is to make sure you kill apps. IE, don't use the home button to exit the app, use the back button. That will kill the app instead of leaving it running in the background.
Its kinda funny, this is all stuff people have mentioned already, but it seriously can be the difference between a half a day and a whole day on a battery...

Is wiping battery stats in cwm still not recomended on gs3?

Is wiping battery stats still does more harm than good?
And is there no need to do battery calibration by charging all the way and wiping stats any more with these new phones/batteries?
lviv73 said:
Is wiping battery stats still does more harm than good?
And is there no need to do battery calibration by charging all the way and wiping stats any more with these new phones/batteries?
Click to expand...
Click to collapse
I read somewhere that an actually Google Developer stated that Wiping Battery Stats does not in any way improve your Battery Life. I will try to find the source for that. As for calibration, if I am not mistaken, with the latest technology for phone batteries this is no longer necessary, but is still traditional practice for many people.
BrandonEnr7 said:
I read somewhere that an actually Google Developer stated that Wiping Battery Stats does not in any way improve your Battery Life. I will try to find the source for that. As for calibration, if I am not mistaken, with the latest technology for phone batteries this is no longer necessary, but is still traditional practice for many people.
Click to expand...
Click to collapse
Yeah I read same thing.It stated that wiping battery stats damages battery life because stats keep track of how many charges battery has left and other things.
So wipe battery stats is only use full if I'm switching batteries?
lviv73 said:
Yeah I read same thing.It stated that wiping battery stats damages battery life because stats keep track of how many charges battery has left and other things.
So wipe battery stats is only use full if I'm switching batteries?
Click to expand...
Click to collapse
Still don't wipe. There is no reason and it will automatically calibrate the battery if needed within a cycle or 2.
Sent from my SGH-I747 using Tapatalk 2
jiffy1080 said:
Still don't wipe. There is no reason and it will automatically calibrate the battery if needed within a cycle or 2.
Sent from my SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
Why is it even there,in cwm?
jiffy1080 said:
Still don't wipe. There is no reason and it will automatically calibrate the battery if needed within a cycle or 2.
Sent from my SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
Because at one point it was believe you had to do that in order to calibrate your battery. Plus when you flash a ROM you can wipe just to see what you get on the first day
Sent from my SPH-L710 using xda app-developers app
I used to wipe battery stats every time I tried a new ROM on my Epic, which for a while was weekly. I know that it quickly became a problem: the battery would never fully charge, the reported information was off by a wide margin (like saying I had 50% left but then two minutes later it shut off due to no battery left), etc. Since then I've never wiped battery stats just for fear of that happening again.
Maybe it would do no harm on a SIII... maybe I just had a bad device or battery or something back then... basically, I don't know for sure if wiping those stats was ever a real problem... but, I know I just won't do it now unless I know to a CERTAINTY it's something I NEED to do, just to be safe.
You know when you go settings battery and get that graph? Then you how that graph resets after every cycle? Every time the graph resets the battery stats are wiped
Edit: so what the guy posted above me doesn't make sense because android does it after every cycle
Sent from my SPH-L710 using xda app-developers app
fzammetti said:
I used to wipe battery stats every time I tried a new ROM on my Epic, which for a while was weekly. I know that it quickly became a problem: the battery would never fully charge, the reported information was off by a wide margin (like saying I had 50% left but then two minutes later it shut off due to no battery left), etc. Since then I've never wiped battery stats just for fear of that happening again.
Maybe it would do no harm on a SIII... maybe I just had a bad device or battery or something back then... basically, I don't know for sure if wiping those stats was ever a real problem... but, I know I just won't do it now unless I know to a CERTAINTY it's something I NEED to do, just to be safe.
Click to expand...
Click to collapse
Had same problem on my Epic Touch.Phone would have 50 percent left and after reboot only 10.But I only wiped stats once of twice so I don't think it has anything to do with that.
jamcar said:
You know when you go settings battery and get that graph? Then you how that graph resets after every cycle? Every time the graph resets the battery stats are wiped
Edit: so what the guy posted above me doesn't make sense because android does it after every cycle
Click to expand...
Click to collapse
Are you sure they're wiped every time? Are you sure there maybe isn't some cumulative stats that don't get wiped? Are you sure there isn't maybe some subset of the stats that get wiped while the rest don't (or vice-versa)?
I ask because I can't say I'm sure of that. I DO know that at least with the Epic what you describe CANNOT have been the case, otherwise any battery stat kinds of issues would have went away with a simple reboot and that just wasn't the case (and I know I was not alone in this by far). While I can completely believe that some aspect of battery stats get wiped with a reboot I have a hard time believing it's a simple as EVERYTHING getting wiped and that's that... unless this is something new with the GSIII or even ICS I suppose.
fzammetti said:
Are you sure they're wiped every time? Are you sure there maybe isn't some cumulative stats that don't get wiped? Are you sure there isn't maybe some subset of the stats that get wiped while the rest don't (or vice-versa)?
I ask because I can't say I'm sure of that. I DO know that at least with the Epic what you describe CANNOT have been the case, otherwise any battery stat kinds of issues would have went away with a simple reboot and that just wasn't the case (and I know I was not alone in this by far). While I can completely believe that some aspect of battery stats get wiped with a reboot I have a hard time believing it's a simple as EVERYTHING getting wiped and that's that... unless this is something new with the GSIII or even ICS I suppose.
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to quote a google engineer
This file [batterystats.bin] is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings. That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you. It has no impact on your battery life.
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-Diane Hackborn
Interesting. Ok, I'm sold Thanks for the info!
Interesting. I've been using the Battery Calibration app after flashing a new ROM every time.
clankfu said:
Interesting. I've been using the Battery Calibration app after flashing a new ROM every time.
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Click to collapse
Well, good news. You don't have to anymore.

Battery Issues

I started running into some battery issues earlier today. I was on AOKP without any issues and one day the battery just started draining very fast. I went from about 50% to 15% in a matter of an hour. That night I slept with my phone charging and it did to get charged passd 54%. And it's charging very slow too. I thought it might be the ROM so I flashed Slim Bean. But it is not heling at all.
Anyone have anything similar going on?
What can I do?
Try calibrating the battery and go like 2-3 charge to discharge and see what its like afterwards
Sent from my SGH-I747M using xda premium
Will do. I'll post back
Yea it takes a few rundowns to get into the sweet spot, I thought I was getting horrible battery life till someone suggested that to me now I get about 32-33 hrs on a charge. Which I think is about prefect, I don't game on it I just use everything else all the time. I have ps3, xbox360 & psp for gaming
Sent from my SGH-I747M using xda premium
Well it's been charging for about 6 hours now and it won't get past 54%
I let it charge all night and when I woke up it was finally at 100%. I left for class and unplugged my phone at 7:40. 20 minutes later it was down to 47%. Then another 2 hours later, it was at 11%. Obviously it is draining far too fast. Will AT&T replace my battery? Or does it look like I'm gonna have to buy a new one?
What I normally do is charge it to 100% then boot into recovery and wipe battery stats. Reboot and don't unplug the phone until it again says that the battery is full. Then run with it and see if it helps.
Go ask them I don't see why they wouldn't replace the battery, it does sound like its shot that kind of drain isn't normal at all
Sent from my SGH-I747M using xda premium
I had the same issues with not getting to 100%. Seems like leaving it on the charger for another couple hours (overnight) got it there.
So I went to the AT&T service shop yesterday and she took my battery and put it in a different Galaxy S III and it showed the battery was charged 97%. In my phone, it showed 23%. She told me that it had somthing to do with my phone being rooted. She said the software on my phone was being "tricked" into believing that the battery is a lot less full than it actually is. She told me to unroot my phone and flash it back to stock. So I did that yesterday and it is still no better. I don't know what to try.
Wiping battery stats doesn't help battery life... Something i learned a long time ago with my X10
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Here's a screenshot of my battery stats. Does Android System usually take up this much battery?
mrb1946 said:
Here's a screenshot of my battery stats. Does Android System usually take up this much battery?
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My Android system is almost always under 15%. Seeing it that high is alarming. I assume you've tried full wiping and changing ROMs?
Sent from my SGH-I747 using xda app-developers app
CamFlawless said:
My Android system is almost always under 15%. Seeing it that high is alarming. I assume you've tried full wiping and changing ROMs?
Sent from my SGH-I747 using xda app-developers app
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Yep. I must've flashed my phone to stock at least 10 times now. Ive tried rooting and Unrooting, clearing my flash counter, I really don't know what else to do.
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Thought I'd try installing CM10 just to see if there would be any difference. Screen Brightness shows up as my highest percentage on the battery usage and Android System is much lower on the list, but the battery is still not charging or discharging correctly.
mrb1946 said:
Thought I'd try installing CM10 just to see if there would be any difference. Screen Brightness shows up as my highest percentage on the battery usage and Android System is much lower on the list, but the battery is still not charging or discharging correctly.
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I would unroot and take everything back to stock, then go back to the AT&T store you went to before and show another service rep that the phone is messed up and see if they give you another one.
Good luck
ObiWanJacoby said:
I would unroot and take everything back to stock, then go back to the AT&T store you went to before and show another service rep that the phone is messed up and see if they give you another one.
Good luck
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Looks like this is my next course of action. Thanks for your help and I'll post back with whatever happens.
mrb1946 said:
I let it charge all night and when I woke up it was finally at 100%. I left for class and unplugged my phone at 7:40. 20 minutes later it was down to 47%. Then another 2 hours later, it was at 11%. Obviously it is draining far too fast. Will AT&T replace my battery? Or does it look like I'm gonna have to buy a new one?
Click to expand...
Click to collapse
mrb1946,
Even though your S3 is reporting percentage values as you stated....the PHYSICAL battery did not drain from a real 100% to a real 47% in 20 minutes. It can't actually physically drain that fast. It would be on FIRE! So, either the calibration of the rom/software or the battery itself somehow messed up.
Also, during that time...was the battery/S3 HOT? That physical evidence would account for some of the drain if it's coming from a rogue app or misbehaving rom component. Did you post a battery drain graph? And were you monitoring the cpu activity during these high drain periods? I mean...periodic checks to see if your CPU is stuck on HIGH freq and if you have any wakelocks shown under the battery graph.
If this problem is still occurring, here's a thread explaining a possible drain from android system. http://forum.xda-developers.com/showthread.php?t=1827087&highlight=android+system

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