Develop Bugs

Battery life discovery on reboot - a WTF moment.

I'm wondering if some if the perceived battery life issue is just that- perception vs. reality...
Could the phone's reporting of battery life be off? A bug?
Check this screen capture I took this weekend. I rebooted my phone, and instantly went from "plenty of battery" to "critical", and my camera flash wouldn't work... A real kick in the pants, since I was at a party:
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I had to plug the phone in on the drive home.
note, however, it was creeping up prior to plug-in, almost as though correcting for itself...?
Why would this happen?
Could this be partly why people are having (or thinking they are having) inconsistent battery performance?
Faulty or bug in battery reporting?
Note I'm on a stock (not rooted) phone, stock kernel.
Sent from my SPH-D710 using XDA App

you need to calibrate your battery. Have you gone from 100% to 0, then back to 100%?

Yep, first day I got my phone I did that.
I've plugged in nightly since, we're not talking a month since. Something is up with this.
Sent from my SPH-D710 using XDA App

geolemon said:
Yep, first day I got my phone I did that.
I've plugged in nightly since, we're not talking a month since. Something is up with this.
Sent from my SPH-D710 using XDA App
Click to expand...
Click to collapse
Have you switched kernel or ROM since calibrating? I do it every time I make one of those changes...lots of baked in unknown tweaks you know..
Sent from my SPH-D710 using xda premium

Might not be the same thing we're talking about, but it happens to me when I charge the phone while its off..
Sent from my GT-I9100 using xda premium

No- as stated above: stock phone, stock kernel, not rooted.
If I'm having this issue, as a fairly experienced Android user (including 2 prior phones that I did root, replace kernels, install custom bootloader and ROMs, without these "one click root" tools... "back in the day" on my old G1 when these luxuries didn't exist, you young'uns lol), i'm suspecting others may also find their systems report incorrect battery stats, might not be apparent if it didn't materialize via a reboot event, as I happened to do.
Sent from my SPH-D710 using XDA App

bruflot said:
It happens when you charge the phone while its off..
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
I don't think I have, save for momentarily once or twice... A battery animation appears, showing charge level... I suspect using those same stats.
This is the first I experienced this type of materialization of incorrect battery stats, and would assume the above to be true, so I didn't take note if the charge % roughly matched at those times.
Would you expect the phone to handle power-off charging differently (other than quicker, for less resources in the background)?
Sent from my SPH-D710 using XDA App

geolemon said:
No- as stated above: stock phone, stock kernel, not rooted.
If I'm having this issue, as a fairly experienced Android user (including 2 prior phones that I did root, replace kernels, install custom bootloader and ROMs, without these "one click root" tools... "back in the day" on my old G1 when these luxuries didn't exist, you young'uns lol), i'm suspecting others may also find their systems report incorrect battery stats, might not be apparent if it didn't materialize via a reboot event, as I happened to do.
Sent from my SPH-D710 using XDA App
Click to expand...
Click to collapse
I had the same problem. Try rooting and getting the battery calibration app. I calibrated and now I can pull my battery whenever and it doesnt drop even 1%.

jermzz said:
I had the same problem. Try rooting and getting the battery calibration app. I calibrated and now I can pull my battery whenever and it doesnt drop even 1%.
Click to expand...
Click to collapse
Well, I've been intentionally not rooting, which is why I'm stock... with my prior phones, I've never been through an official update cycle... I'd like to see how that's pulled off actually. And form opinions of each - experience.
And also, I want to be (and stay) stable. For now at least.
This seems simply like a bug... not something that Samsung would advise to 'root to resolve' - trust me, someday my willpower won't be so strong, but I'm curious how to resolve this issue via "official means". It's a bug.
Is my only "stock" option to drive the phone through a full discharge/recharge cycle again?

I have this problem too
I calibrated battery with several apps, didn't help at all.
But it only happens when I reboot with the battery around 70% or below

justwonder said:
I have this problem too
I calibrated battery with several apps, didn't help at all.
But it only happens when I reboot with the battery around 70% or below
Click to expand...
Click to collapse
Interesting... That's EXACTLY what I'm seeing too.
I rebooted a couple times at work today to see, I hadn't even used 10% or 15% charge yet, the phone rebooted right back to where it was.
I just went to dinner with about 50% left, rebooted, and look what I got:
Note I drove home with navigation on intentionally trying to burn battery if that's my only option, you can see on the plot.
Sent from my SPH-D710 using XDA App

This has happened to me too but usually when the battery is below 30%. When I reboot the battery level drops to critical (around 5%). Gotta be a software bug.

Well.. Continuation of the above, I drained my battery until the phone shut off to effect a reset of stats:
Then plugged in, powered back up, and let the phone charge from 0% to 100% overnight while I slept in an "on" condition, since someone suggested charging while powered off may be part of the bug.
It'll be significant if this resolves the issue, as well as if it doesn't.
Sent from my SPH-D710 using XDA App

How do you calibrate your battery and what is The benefit form this?
Sent from my SPH-D710 using XDA Premium App

jprovan1 said:
How do you calibrate your battery and what is The benefit form this?
Sent from my SPH-D710 using XDA Premium App
Click to expand...
Click to collapse
It is supposed to calibrate the battery stats so your charge indicator displays an accurate charge state, but my evidence below shows we've got a bug here...
Sent from my SPH-D710 using XDA App

AFTER the above resetting of the battery stats:
Even more interesting...
Yesterday's full-discharge, full-recharge didn't seem to have much effect on this symptom:
That dropoff to the right corresponds to a reboot.
Anyone else experiencing this?
Try to reboot at about 40%-50% charge, and see if your phone reports a different charge level on reboot.
Appears to be a bug with the way the stock phone handles battery stats.
Sent from my SPH-D710 using XDA App

I had this happen a few times off and on over the past week - but NOT every time I rebooted, which seems weird. I woke up the other day with 60-something percent battery, and had to reboot for whatever reason. When it came back on 20 seconds later, I was sitting at around 8%.
I've also been having an issue where the phone doesn't charge while turned on and plugged in - Sprint is ordering me a new battery, so hopefully that fixes the charging part. Basically the battery overheats and stops charging after 15 minutes or so. I still suspect that may be a glitch in the software too, and not the battery considering I ws getting close to 30 hours of battery life a week or two ago...
As far as the sudden drop part, I'm hoping it doesn't happen again and that it was simply some kind of glitch. Obviously, if its happening after every single reboot, then it's probably software related.

Galaxy Nexus won't charge past 89%

Hey guys,
I've tried Googling this problem but haven't found any real info or a solution. I have a Verizon Galaxy Nexus with the official 210o mAh battery. For the life of me, I can't get it to charge anywhere close to 100%, not even 95%. It seems to stop right at 89%. I'll leave it on the charger at night and when I wake up, it's always showing 89%. If I go into the battery info , it will say 89% not charging. Is there any way I can get it to charge into the 90's? I'm sure it's not a software issue since I've seen this on AOKP b40 and M6 as well as Jelly Belly 3.4 and 3.9.

Wipe battery stats, re calibrate the battery, it could be a kernel problem, completly drain battery and recharge to full with phone turned off. These would be my course of actions. If all else fails maybe replace the battery.

phatmanxxl said:
Wipe battery stats, re calibrate the battery, it could be a kernel problem, drain battery and recharge to full with phone turned off. These would be my course of actions.
Click to expand...
Click to collapse
Thanks. I've tried different kernels (faux, franco, trinity, lean) and I still see the problem. I haven't tried wiping battery stats/recalibrating since I've read it doesn't really do anything, but I guess it's worth a shot.

johnan2112 said:
Thanks. I've tried different kernels (faux, franco, trinity, lean) and I still see the problem. I haven't tried wiping battery stats/recalibrating since I've read it doesn't really do anything, but I guess it's worth a shot.
Click to expand...
Click to collapse
If this phone is anything like the SGS2 wiping stats does nothing.
Sent from my Galaxy Nexus using xda premium

johnan2112 said:
Thanks. I've tried different kernels (faux, franco, trinity, lean) and I still see the problem. I haven't tried wiping battery stats/recalibrating since I've read it doesn't really do anything, but I guess it's worth a shot.
Click to expand...
Click to collapse
It might just be the battery itself, I wouldn't know what else to do

phatmanxxl said:
It might just be the battery itself, I wouldn't know what else to do
Click to expand...
Click to collapse
It might be. I might put in the standard battery tonight, charge it up and see if it hits 100% (or as close as it will get to 100%) when I wake up in the morning.

You can't calibrate a battery and wiping stats does nothing...
I wish people would stop spreading this false info

crixley said:
You can't calibrate a battery and wiping stats does nothing...
I wish people would stop spreading this false info
Click to expand...
Click to collapse
This, battery is faulty, get a new one
Sent from my Galaxy Nexus using xda app-developers app

try a different charger?

OK, so I'm seeing the same issue with the standard 1850 mAh battery. Stuck at 89% on the charger and the battery stats says "not charging" while it's on the charger. I've tried the standard Gnex OEM charger, my wife's SGS3 charger and my old Droid X charger and all say the same thing. So strange...

johnan2112 said:
OK, so I'm seeing the same issue with the standard 1850 mAh battery. Stuck at 89% on the charger and the battery stats says "not charging" while it's on the charger. I've tried the standard Gnex OEM charger, my wife's SGS3 charger and my old Droid X charger and all say the same thing. So strange...
Click to expand...
Click to collapse
Maybe an issue with the connect port? Do you just rip the cord out?

No, of course not. Plus, if it was an issue with the micro USB connection, wouldn't it simply not charge altogether?

johnan2112 said:
No, of course not. Plus, if it was an issue with the micro USB connection, wouldn't it simply not charge altogether?
Click to expand...
Click to collapse
I had an old Droid X that wouldnt charge past a certain point but I could fully charge my battery in my girlfriends X with the same charger so i dunno

Tested on different phones
Here's my issue I got since I rooted and flashed JRO03C Jelly Bean Rom.
Since then I've tried many roms, battery calibration (that I learned, does nothing), tried many "fixes" like disabling everything while charging, realingning the usb pins...
The fact is that : My battery is actually charged 100%, but shows from 74% to 86% (depending on the rom).
If I take my battery and put it in another Galaxy Nexus that hasn't been rooted, it gets 100%.
If I take a 100% battery from that unrooted Galaxy Nexus and put it in mine, it shows only 74% to 86%.
Sometimes, the battery gains % while I use it (It's a 74% when It's not charging anymore, half an hour later it shows 76%)
I don't seem to have lost any life time, but here's the problem as I see it.
Either my phone cannot properly analyse de output of the battery, or there is sont slack connectors inside the phone that actually dont get 100% output from the battery.

Take it to Verizon, show them, and they will give you a replacement.

I'm having the same issue as the OP, my battery was fine until about a few weeks ago. Nothing changed as far as ROM or kernel go. I have the Seidio 3800 though. My phone just refuses to charge completely even when turned off and charging. The animation for charging that last little bit literally stays on forever. I left it on the charger for almost 8 hours after this really started to bug me, and upon turning it on I was greeted with 88% and it quickly dropped to the mid 70%'s where it floats out for a long while. This is my second battery from Seidio, the first didn't work with NFC and charged too 100% just fine. The OEM battery will no longer charge completely either.

]
incrediblecub said:
I'm having the same issue as the OP, my battery was fine until about a few weeks ago. Nothing changed as far as ROM or kernel go. I have the Seidio 3800 though. My phone just refuses to charge completely even when turned off and charging. The animation for charging that last little bit literally stays on forever. I left it on the charger for almost 8 hours after this really started to bug me, and upon turning it on I was greeted with 88% and it quickly dropped to the mid 70%'s where it floats out for a long while. This is my second battery from Seidio, the first didn't work with NFC and charged too 100% just fine. The OEM battery will no longer charge completely either.
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Click to collapse
You used a non-nfc battery in your phone? HUGE no no.
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http://www.talkandroid.com/77193-nf...s-battery-secure-tokens-may-cause-nfc-issues/
http://www.galaxynexusforum.com/for...-interchangeable-between-hspa-lte-models.html
http://androidforums.com/samsung-galaxy-s2-t/430774-non-oem-battery-upgrade.html

JediNinjafication said:
]
You used a non-nfc battery in your phone? HUGE no no.
Click to expand...
Click to collapse
Yeah, as relevant as your post is, no. My batteries have all been NFC capable, one was defective and didn't work. I don't even know why you posted all of that, the last two links weren't even relevant to your point. I think the whole NFC token thing is fooey anyway.
The issue at hand here is my battery life being miserable and reported very incorrectly for virtually no reason at all.

Relevant because it also has to do with chargers used if they don't have same voltage as original or it messes up the nfc. Just saying the batteries, phones, and chargers have to be the ones they can with. Also same info on Samsung site, fine print at bottom. Anyway, just trying to help because I had same problem and don't anymore.

JediNinjafication said:
Relevant because it also has to do with chargers used if they don't have same voltage as original or it messes up the nfc. Just saying the batteries, phones, and chargers have to be the ones they can with. Also same info on Samsung site, fine print at bottom. Anyway, just trying to help because I had same problem and don't anymore.
Click to expand...
Click to collapse
I'm using the OEM charger and cable, always have.
Your first link goes to a Verizon image talking about a possible less than stellar experience with NFC on the Gnex with using other batteries. The second link talks about compatibility of batteries between the GSM and CDMA version of the Gnex. The last link isn't even about the Galaxy Nexus, it's the GSII. None of them mention chargers/voltages/messing up NFC.
Edit: Back to the task at hand, I was just wondering if the OP ever got his battery life figured out, or if he just replaced the thing.

Phone coming, 24 hours charge?

Hello, one question, I've always tried to charge my new phones a whole day before using, I've been told that by doing that, you improve battery's performance, my Samsung galaxy S3 is coming today, and I'd like to know once and for all, is this true? Do I really need to give it a 24 hours charge to make it work the best? To be honest, I do not believe it, but I've been doing it with all my phones so far, just to stay on the safe side, hahaha, anyway, please let me know...thanks in advanced!

Not necessary, just a waste of electricity
Sent from my SGH-T999 using Tapatalk 2

24 hour charge? Sure, blow up your battery. /joke
Overcharging your battery is NEVER good.
Once it's at 100%, unplug it.

Anything over what it takes to reach 100% is always going to be overkill.
Sent from my SGH-T999

theexel said:
24 hour charge? Sure, blow up your battery. /joke
Overcharging your battery is NEVER good.
Once it's at 100%, unplug it.
Click to expand...
Click to collapse
These phones aren't smart enough to stop drawing current? Even my iPad 2 is......

psykhotic said:
These phones aren't smart enough to stop drawing current? Even my iPad 2 is......
Click to expand...
Click to collapse
I believe there's a kernel tweak floating around that allows charging up to a certain amount of percentage, but I'm not sure it stops drawing current.
I don't believe so.

Of course the phone stops drawing current when it's at 100%
Sometimes I can't believe the ignorance on xda.
You can leave it plugged in forever, nothing bad will happen.

ingenious247 said:
Of course the phone stops drawing current when it's at 100%
Sometimes I can't believe the ignorance on xda.
You can leave it plugged in forever, nothing bad will happen.
Click to expand...
Click to collapse
Oh yeah? So why can't you leave a laptop plugged in all the time with no Ill effects? Of course there are steps taken to prevent overcharging but you can't leave in plugged in forever without ill effect.
Sent from my SGH-T999

The 24hour charged was on old phones, before lithium ion battery came around so your good
Sent from my SGH-T999 using Tapatalk 2

joshnichols189 said:
Oh yeah?
Click to expand...
Click to collapse
Yeah.
joshnichols189 said:
So why can't you leave a laptop plugged in all the time with no Ill effects?
Click to expand...
Click to collapse
I don't know, maybe because you have an OLD laptop?
joshnichols189 said:
Of course there are steps taken to prevent overcharging but you can't leave in plugged in forever without ill effect
Click to expand...
Click to collapse
Even if that were true, I believe the OP said 24 hours.. Hardly what I would consider "forever"
I leave my phone plugged in all night while I sleep and until I leave for work the next morning, every night, which is at least 5-8 hours depending on how much sleep I get that night. Been doing that since my MyTouch 4G, which I still have, as well as my GS2, and now my GS3. All of them work great and still get the same battery life they always did.
The most important factor in charging your device is the temperature the battery stays at. If, for some reason it is in a heightened temperature state, such as leaving it plugged in all night while downloading a ****load of torrents, then yeah it could damage the battery since you're prolonging the time the battery stays warm.
Otherwise you're fine.

He's not asking if it will hurt the phone, he's asking if it's necessary, and the answer is no
Sent from my SGH-T999 using Tapatalk 2

psykhotic said:
These phones aren't smart enough to stop drawing current? Even my iPad 2 is......
Click to expand...
Click to collapse
ingenious247 said:
Of course the phone stops drawing current when it's at 100%
Sometimes I can't believe the ignorance on xda.
You can leave it plugged in forever, nothing bad will happen.
Click to expand...
Click to collapse
No need to call anyone ignorant nor impy that.
This certain topic about the effects of battery charging, usage, etc. have been discussed all over the forum.
I was simply stating what I have read and researched.
As you may have I read, I said I wasn't sure.
Overcharging Lithium-ion
Lithium-ion operates safely within the designated operating voltages; however, the battery becomes unstable if inadvertently charged to a higher than specified voltage. Prolonged charging above 4.30V forms plating of metallic lithium on the anode, while the cathode material becomes an oxidizing agent, loses stability and produces carbon dioxide (CO2). The cell pressure rises, and if charging is allowed to continue the current interrupt device (CID) responsible for cell safety disconnects the current at 1,380kPa (200psi).
Should the pressure rise further, a safety membrane bursts open at 3,450kPa (500psi) and the cell might eventually vent with flame. The thermal runaway moves lower when the battery is fully charged; for Li-cobalt this threshold is between 130–150C°C (266–302°F), nickel-manganese-cobalt (NMC) is 170–180°C (338–356°F), and manganese is 250°C (482°F). Li-phosphate enjoys similar and better temperature stabilities than manganese.
Lithium-ion is not the only battery that is a safety hazard if overcharged. Lead- and nickel-based batteries are also known to melt down and cause fire if improperly handled. Nickel-based batteries have also been recalled for safety concerns. Properly designed charging equipment is paramount for all battery systems.
Click to expand...
Click to collapse
And I totally respect your reply and if you're correct, then I learned something new today.
If this is something that the Android kernel has built in, a "safety charge limit" sort-to-speak, then great.

The information you're posting there is what would happen IF there were no safeguards in place
But, alas, there are.
And you're right, my apologies for the hot headed comment. Sometimes when I see people posting misinformation and then being downright adamant about it when someone is asking for real advice, it irritates me.
And although you are right, it is NOT necessary, I do believe I have seen instructions to do so from a couple of phone instructional or "quick start" booklets, including the GS2
I'll have to check it later to see (I still have all the original guides/paperwork)
---------- Post added at 12:25 PM ---------- Previous post was at 12:21 PM ----------
Matter of fact, I just ran a quick Google search, and yes - it's true.
Many phone mfg's tell you to charge it for 24 hours on the initial charge..

ingenious247 said:
Yeah.
I don't know, maybe because you have an OLD laptop?
Even if that were true, I believe the OP said 24 hours.. Hardly what I would consider "forever"
I leave my phone plugged in all night while I sleep and until I leave for work the next morning, every night, which is at least 5-8 hours depending on how much sleep I get that night. Been doing that since my MyTouch 4G, which I still have, as well as my GS2, and now my GS3. All of them work great and still get the same battery life they always did.
The most important factor in charging your device is the temperature the battery stays at. If, for some reason it is in a heightened temperature state, such as leaving it plugged in all night while downloading a ****load of torrents, then yeah it could damage the battery since you're prolonging the time the battery stays warm.
Otherwise you're fine.
Click to expand...
Click to collapse
Of course leaving it plugged in over night won't hurt, but I highly doubt leaving it plugged in for extended periods of time will have no ill effects. Also I don't consider a laptop from 2011 to be very old..
Sent from my SGH-T999

ingenious247 said:
The information you're posting there is what would happen IF there were no safeguards in place
But, alas, there are.
And you're right, my apologies for the hot headed comment. Sometimes when I see people posting misinformation and then being downright adamant about it when someone is asking for real advice, it irritates me.
And although you are right, it is NOT necessary, I do believe I have seen instructions to do so from a couple of phone instructional or "quick start" booklets, including the GS2
I'll have to check it later to see (I still have all the original guides/paperwork)
---------- Post added at 12:25 PM ---------- Previous post was at 12:21 PM ----------
Matter of fact, I just ran a quick Google search, and yes - it's true.
Many phone mfg's tell you to charge it for 24 hours on the initial charge..
Click to expand...
Click to collapse
Ah, gotcha.. nice find. Thanks, bud. :highfive:
So I guess it's not necessary nor required, but often recommended. :good:

joshnichols189 said:
Oh yeah? So why can't you leave a laptop plugged in all the time with no Ill effects? Of course there are steps taken to prevent overcharging but you can't leave in plugged in forever without ill effect.
Sent from my SGH-T999
Click to expand...
Click to collapse
I have my 3yr old laptop charged / plugged in 24/7. Battery still lasts ~ 3-4 hours on performance mode. This is a 9-cell. So no I don't believe there are any ill effects with modern batteries. I've always left my phones plugged in over night and I know it stays plugged in after 100% for hours before I unplug it. Battery life is always the same. It's only ever bad depending on the rom/kernel I use.

no need however
saman0suke1 said:
Hello, one question, I've always tried to charge my new phones a whole day before using, I've been told that by doing that, you improve battery's performance, my Samsung galaxy S3 is coming today, and I'd like to know once and for all, is this true? Do I really need to give it a 24 hours charge to make it work the best? To be honest, I do not believe it, but I've been doing it with all my phones so far, just to stay on the safe side, hahaha, anyway, please let me know...thanks in advanced!
Click to expand...
Click to collapse
U don't have to leave pluggled that long but one thing is tru that before u plug ur phone for the 1st time u have to drain the battery to zero and the charge it fully...

Mr_Jay_jay said:
U don't have to leave pluggled that long but one thing is tru that before u plug ur phone for the 1st time u have to drain the battery to zero and the charge it fully...
Click to expand...
Click to collapse
That's not actually true either
http://en.m.wikipedia.org/wiki/Lithium-ion_battery#Charge_and_discharge
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Sent from my SGH-T999 using Tapatalk 2

So, let's say it's not recommeded since the benefits are none, right? should I fully charge it and the use it or use it until it discharges, and the charge it for the first time? thanks for all the comments!!

I got a powerbook in 05 and left it plugged in for 4 years with no problems.. my MBP has been plugged in since 09 with no problems.

Battery Failure Issues

As stated in the title, my device is having battery issues. I tried posting in the dev thread for the rom I *was* running, thinking it was a problem with the ROM but it turns out it isn't. I'm seeing the battery randomly report 0% and the phone instantly shutting down. I am then able to reboot, and every reboot will show a gradually increasing battery level, from 0% to 70%. I am currently running the P.A.C. rom, but I was running the CM10 port by dman. I was originally told this issue could be from a misbehaving 3rd party app, but I am running brand new P.A.C. without any 3rd party apps installed.
Here's a picture of my battery stats from CM10. PAC is the second one.
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I've read that it may be a mis-calibrated battery meter, but I've done multiple charge cycles since this issue has begun. If anyone can shed some light on this, I'd really appreciate it. This device is my daily driver, despite running development roms.

I myself have noticed my battery is losing its charge on its own. I charge it to 100% then remove it from the phone and put it back in 6 hours later and it is down to 90%. I bought some other batteries from ebay and they keep their charge when not in use so I think my original battery is dieing. I recommend you do the same test and see if it could be your battery.

I'm thinking my battery may be faulty but the weirdest part is that it rarely fails outside of school. Whenever I'm home it lasts hours on end, but the moment I get to school it starts freaking out. It's probably just coincidence, which is why I didn't mention it in the OP. Just wondering, dudejb, when did you get your phone? Mines under a year old.
EDIT: Uh... well, the phone was acting odd, with the screen blacking out, so I pulled the battery, and the phone was running without a battery (plugged in) for about 40 seconds, and it didn't detect the battery was removed. Then it crashed. I'm seeing weirder and weirder things happening with this phone... D:
EDIT 2: Well, it crashed, rebooted by itself, and has now been stuck in a boot loop for the past 20 minutes. :I And I still have 2 years until I can upgrade my phone...

Last year around this time December. DO you have bad reception at school. this can effect the battery as it keeps looking for a signal.

dudejb said:
Last year around this time December. DO you have bad reception at school. this can effect the battery as it keeps looking for a signal.
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Click to collapse
In some areas, but none of those areas are where it dies. Actually, you can see in the battery stats picture (the PACman rom one) That I have a good signal when it drops. The mobile signal bar is green when it drops.
Well, I've managed to cause it to reboot itself while streaming the logcat to my desktop via ADB, and the original error is completely blown out of the buffer before I can cancel the output. :/

Well, simply as an update, I rarely used my device today, and I had 0 battery issues. I had the clockspeed gov set to conservative, and only lightly used the phone (calulator, calendar, etc.). Battery was 60% when I got home after approx 8 hours off charge, instead of needing to be recharged after 5 hours. I don't know what I did, but it seems my specific phone is just unstable under heavy use. :/

Hello.
I have exactly the same problem. Everything is ok if I don't use the phone, but if I listen music, play a game or surf the battery indicator can go instantly from a XX % to 0%. This issue started with the coming of cold here, maybe the battery is dead ?
It is impossible to restart the phone after, unless I plug it. When I reboot it, some time it indicate 0%, sometimes the same XX% before it shutdown.
Sometimes when I plug it, during a short time, the XX% decrease (!!!) instead of increase.
I tried to recalibrate the battery with CWM : no change.
Edit 14 January 2013
I just got my new battery, everything is ok now.

Same problem here as well. I'm planning on getting a replacement battery to see if it will fix anything.
Sent from my SGH-I927 using xda app-developers app

I'm blaming the prob at the battery! my wife's phone is having the dame prob, switched batteries to mine and now I have the issue!!
she would never let the phone fully charge, it would go till maybe 5 to 10% then she'd charge it to 50% and go again! I'm thinking that broke the battery! mine lives on the charger at night. usually last me all day sometimes it's only at 40 to 50% by the end of the day, when I get ready to sleep, it goes on the charger!! done all my phones this way and they last! never had to replace a battery!.
Of course this is only the 2nd half computer half phone I've had!

The battery is the issue I just bought a new hyperion battery 3500hz and its fixed my issue
---------- Post added at 04:54 PM ---------- Previous post was at 04:51 PM ----------
The damn phone kept saying it was still good and I just couldn't figure it out but that damn battery was the issue after all... so just buy her a new battery, I got this one for about $18.00 and its already doing so much better and charging like it would normally

hazard1nc said:
The battery is the issue I just bought a new hyperion battery 3500hz and its fixed my issue
---------- Post added at 04:54 PM ---------- Previous post was at 04:51 PM ----------
The damn phone kept saying it was still good and I just couldn't figure it out but that damn battery was the issue after all... so just buy her a new battery, I got this one for about $18.00 and its already doing so much better and charging like it would normally
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Click to collapse
How's it charging the extended batteries? I'm looking at a pair of 3800ma batteries on eBay going for about $18. The come with new back covers too!
Thanks
Sent from my SGH-I927 using Tapatalk 2

dbrannon79 said:
How's it charging the extended batteries? I'm looking at a pair of 3800ma batteries on eBay going for about $18. The come with new back covers too!
Thanks
Sent from my SGH-I927 using Tapatalk 2
Click to expand...
Click to collapse
Its using the same charger I had to begin with it just takes a longer time, I charged last night and was on facebook all night forgot to close out, made several calls and been online and only down to 64% right now. The size of the backplate makes the slide out keyboard easier to use as well, my big hands find using it easier now.

doode2011 said:
Same problem here as well. I'm planning on getting a replacement battery to see if it will fix anything.
Sent from my SGH-I927 using xda app-developers app
Click to expand...
Click to collapse
I had the same behavior and it was in fact specific to my battery. I have three batteries, so it took me a while to single it out but after worrying it was the rom(s) I found that it was just the one battery, which was an OEM and not one of my cheap chinese ebay ones. I would give a new battery a try for sure.

SillyB said:
I had the same behavior and it was in fact specific to my battery. I have three batteries, so it took me a while to single it out but after worrying it was the rom(s) I found that it was just the one battery, which was an OEM and not one of my cheap chinese ebay ones. I would give a new battery a try for sure.
Click to expand...
Click to collapse
Exactly. It is unusual that the battery status seems off by ics or gingerbread.. it was concerning until I zeroed in on the problem.
It is likely the battery.

My wife's phone just began having this exact same problem. She is running the newest ATT ROM, no mods, no root, nothing. It began about a week ago. The battery will be at 65%, then all of a sudden, 0%. Leave it off for a bit, turn it back on, and it's at 30%. I've also noticed it's draining really fast. Went from 90% to 50% in the span of half an hour.
I was going to try a calibration or even a hard reset, but from what I'm reading here, this is a battery issue? She doesn't want an extended battery, and still has six months until her upgrade. Any suggestions for a fairly cheap aftermarket? No way I'm getting an OEM replacement with the original having this problem. Sounds like the control circuit is fried.

I can confirm that it is the battery. I had to replace mine and I was one month past my warranty.
My battery was swollen. Take the battery out and put it on a wooden desk. Spin it like you would as a bottle (spin the bottle game type spinning). If it spins, yours is too. At&t will replace (for free) it as its a common issue if you're under warranty. If not, you will have to buy one yourself.
Sent from my SGH-I927 using xda premium

Mine was one month past too. Easy solution: went to the retailer we originally got it from, bought one (a Glide) outright, swapped the battery, and returned it (the Glide). By the time this battery fails, she'll have an upgrade.

Same issue some months later with my new official battery.
In the same time, screen is gone crazy like it was being controlled by other people than myself...
I will order an extended battery on eBay now...

another battery life issue

I'm sure this question has been asked before. But I'm coming from an iPhone so Neff help with this.
As soon as I start using the phone in the morning when it's connected to WiFi. Within a second of using it or 2 minutes if we're being realistic. The phone loses 2%. Is this normal ? Coming from an iPhone where 100% would last at least 20-30 mjnutes. I can't seem to find anything draining my phone either !

I think a longer observation period (a full day / through the night) will give a better idea of how your battery performs. Use the default power settings or other batter monitoring application like GSam Battery Monitor and compare it against other users here.

myth1001 said:
I think a longer observation period (a full day / through the night) will give a better idea of how your battery performs. Use the default power settings or other batter monitoring application like GSam Battery Monitor and compare it against other users here.
Click to expand...
Click to collapse
If did that across the whole day yesterday let me show you the result. I usually charge when the phone gets to around 35-40%
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muzia22 said:
I'm sure this question has been asked before. But I'm coming from an iPhone so Neff help with this.
As soon as I start using the phone in the morning when it's connected to WiFi. Within a second of using it or 2 minutes if we're being realistic. The phone loses 2%. Is this normal ? Coming from an iPhone where 100% would last at least 20-30 mjnutes. I can't seem to find anything draining my phone either !
Click to expand...
Click to collapse
I just got my phone & I'm having the same issue, I read online that after a few charging cycles we should have alot better battery life

MyNameIsRamo said:
I just got my phone & I'm having the same issue, I read online that after a few charging cycles we should have alot better battery life
Click to expand...
Click to collapse
Had about 3-4 days worth this end will keep an update here. So far not bad been intense usage for about 2-3 hours lost about 25 percent. Could be worse

muzia22 said:
Had about 3-4 days worth this end will keep an update here. So far not bad been intense usage for about 2-3 hours lost about 25 percent. Could be worse
Click to expand...
Click to collapse
Well that's alot better than what i'm currently getting so there's hope

muzia22 said:
If did that across the whole day yesterday let me show you the result. I usually charge when the phone gets to around 35-40%
[/IMG]
Click to expand...
Click to collapse
Well that's 3.5 hours of screen on time and you're at 45%. That doesn't look bad to me.
Sent from my HTC One_M8 using XDA Free mobile app

myth1001 said:
Well that's 3.5 hours of screen on time and you're at 45%. That doesn't look bad to me.
Sent from my HTC One_M8 using XDA Free mobile app
Click to expand...
Click to collapse
Okay just making sure I'm getting the full potential of the phone Lolz reviews kept saying 6 hours but that's assuming they let it get to zero

muzia22 said:
Okay just making sure I'm getting the full potential of the phone Lolz reviews kept saying 6 hours but that's assuming they let it get to zero
Click to expand...
Click to collapse
Any update?

Got nearly 20 hours off charge with moderate usage throughout the day with a mixture of WiFi and 4G. Turning power saver at 50. Phone had 33 per cent left by end of day.

MyNameIsRamo said:
Any update?
Click to expand...
Click to collapse
Look above

MyNameIsRamo said:
I just got my phone & I'm having the same issue, I read online that after a few charging cycles we should have alot better battery life
Click to expand...
Click to collapse
Urban myths and old wives tales. Cycling the battery doesn't "improve" battery life on a Li ion battery. What you are possibly doing is making the battery meter more accurate (placement of the "high" and "low" flags that correlate voltage with "full" and "empty"). But its just a means of measurement, and this doesn't affect the battery life itself. Meaning, it doesn't "improve" battery life any more than messing with the fuel gauge in your car would increase or decrease the amount of gas in the tank.
---------- Post added at 12:18 PM ---------- Previous post was at 12:15 PM ----------
muzia22 said:
As soon as I start using the phone in the morning when it's connected to WiFi. Within a second of using it or 2 minutes if we're being realistic. The phone loses 2%. Is this normal ? Coming from an iPhone where 100% would last at least 20-30 mjnutes.
Click to expand...
Click to collapse
This doesn't mean anything. The battery % is just an estimation based on battery voltage remaining versus how the phone "thinks" you are going to use it. Comparing 98% on Android versus 100% on iOS is apples to oranges. There is no standard for this, or reason to believe they are in anyway comparable.
As previously noted, 3.5 hours screen-on time with 55% drain (45% remaining) is very normal, even good. A lot of things affect battery life, not least of which is how you use your phone, and cell reception in your area. You will see a wide array of variance in the battery life people get. And since yours seems actually pretty good, I wouldn't worry about it.

redpoint73 said:
Urban myths and old wives tales. Cycling the battery doesn't "improve" battery life on a Li ion battery. What you are possibly doing is making the battery meter more accurate (placement of the "high" and "low" flags that correlate voltage with "full" and "empty"). But its just a means of measurement, and this doesn't affect the battery life itself. Meaning, it doesn't "improve" battery life any more than messing with the fuel gauge in your car would increase or decrease the amount of gas in the tank.
---------- Post added at 12:18 PM ---------- Previous post was at 12:15 PM ----------
This doesn't mean anything. The battery % is just an estimation based on battery voltage remaining versus how the phone "thinks" you are going to use it. Comparing 98% on Android versus 100% on iOS is apples to oranges. There is no standard for this, or reason to believe they are in anyway comparable.
As previously noted, 3.5 hours screen-on time with 55% drain (45% remaining) is very normal, even good. A lot of things affect battery life, not least of which is how you use your phone, and cell reception in your area. You will see a wide array of variance in the battery life people get. And since yours seems actually pretty good, I wouldn't worry about it.
Click to expand...
Click to collapse
Thanks [emoji3] it was actually &37 percent but that's still pretty good with the battery save g options available I should be able to exceed a full day in the event of an unplanned night out !

To be fair, I feel like Apple designs their phone where their first 20% will take forever to drop but as soon as it passed that point it falls to 0. And yes I've seen it shut down at 10, turned it back on it's at 2. Where as this phone's last 15% seems to take forever to drop.
Sent from my HTC One_M8 using XDA Free mobile app

id say thats pretty good life outta the battery. the more you use it the more its gonna drain. and those getting like 6 hours of screen on time are strictly on wifi at an office or something. if your out roaming with LTE and the such your probably not going to get 6 hours...

Intense usage on 4g with lots of camera usage and uploads music and a few phone calls. So far so good! Had more than enough when I got home to leave without changing I case I needed it

Teo032 said:
To be fair, I feel like Apple designs their phone where their first 20% will take forever to drop but as soon as it passed that point it falls to 0. And yes I've seen it shut down at 10, turned it back on it's at 2. Where as this phone's last 15% seems to take forever to drop.
Click to expand...
Click to collapse
I feel the M8, and my past Android phones take a disproportionate amount of time to drop the first few % as well. Maybe not as much as what you are mentioning for the iPhone (couldn't personally comment). May have to do with the saturation charge that occurs when the battery nears full (in fact, you should actually leave your phone on charge for some time after it says full).
Also, the battery meter on any phone is far from accurate. It often can't really be trusted with be within 5 or even 10%. So that would explain why you saw it "jump" down 8%.

Yeah my point was that all these phones' measure battery differently and not exactly accurate so you shouldn't compare Apple to oranges. Oh and the jump in percentages was referring to the iPhones. If anything Android tends to jump up when turned back on lol.
Sent from my HTC One_M8 using XDA Free mobile app