I am looking for some thoughts on troubleshooting a mysterious battery drain issue.
My TF-201 and dock used to hold a charge for a week or more when doing nothing. Recently my TF201 will drain the battery in less than a day even when docked. I notice this when I try to use it and it is dead. Of course, once it's dead, I can't view batter stats or use Better Battery stats to see what is causing the drain. The data is gone.
Here's what's happening. The Asus is docked and closed and will idle for a day or two and I might get a 10% drop in battery charge. Then, it just drops to zero the next day.
I am examining if there are any events that are schedule to occur that might keep Wi-Fi on or the CPU out of a deepsleep, either or both would drain the batter, but since I haven't caught it at a low enough point that shows massive drain without being completely drained, I haven't had much luck.
I haven't tried leaving it undocked to see if the problem persists (if it didn't, that indicates a problem with the keyboard/dock. It did persist, that would indicate a problem elsewhere).
Any ideas on how to proceed?
mfratto said:
I am looking for some thoughts on troubleshooting a mysterious battery drain issue.
My TF-201 and dock used to hold a charge for a week or more when doing nothing. Recently my TF201 will drain the battery in less than a day even when docked. I notice this when I try to use it and it is dead. Of course, once it's dead, I can't view batter stats or use Better Battery stats to see what is causing the drain. The data is gone.
Here's what's happening. The Asus is docked and closed and will idle for a day or two and I might get a 10% drop in battery charge. Then, it just drops to zero the next day.
I am examining if there are any events that are schedule to occur that might keep Wi-Fi on or the CPU out of a deepsleep, either or both would drain the batter, but since I haven't caught it at a low enough point that shows massive drain without being completely drained, I haven't had much luck.
I haven't tried leaving it undocked to see if the problem persists (if it didn't, that indicates a problem with the keyboard/dock. It did persist, that would indicate a problem elsewhere).
Any ideas on how to proceed?
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Hi,
If you check the battery usage you can see what app is using your battery. Maybe an app or a process running and this causing the drain. If you cannot see anything there I would do a factory reset..
Related
Been using the g tab since December and have always been impressed by its battery life. Only issue was the battery meter never seems to reflect the true battery level. I had times when it just shut off without warning with the battery meter at 100% while other times, it drained rapidly to 0% within 20 minutes.
I know the general fix is to delete battery stats with recovery (which i have been doing frequently) but that still doesn't quite solve the problem. As such, i decided to test the exact battery life of the tablet. I am quite shocked at just how good it is o.0.
I've had a (1hr 17 mins) video looping with wifi on and connected for exactly 9 hours now as i am typing this. The battery meter still reads 100% but i think it will turn off/drain rapidly soon.
I am on TNT Lite 3.1.4 btw (old but gold).
Update: Tablet just shut off after 10h and 56 minutes on video loop + wifi. Video was stored on tablet memory.
Issue: Battery meter never drained and was 100% till death (i plugged in and rebooted and it read 100%). I had just wiped battery stats before doing this experimental run. Any suggestions to deal with the battery meter issue?
I had a similar problem with another tablet after wiping the battery stats and still don't know if that was the issue or not. From my recollection, you were supposed to discharge the tablet completely and then delete the battery stats (or was it charge it completely?). Is it possible you deleted it in the wrong state, so it thinks an empty battery is full? I always wonder if I might find a similar fix for the other tablet or if the charging hardware simply failed (not a gTablet -- a flytouch2 type device).
wd5gnr said:
I had a similar problem with another tablet after wiping the battery stats and still don't know if that was the issue or not. From my recollection, you were supposed to discharge the tablet completely and then delete the battery stats (or was it charge it completely?). Is it possible you deleted it in the wrong state, so it thinks an empty battery is full? I always wonder if I might find a similar fix for the other tablet or if the charging hardware simply failed (not a gTablet -- a flytouch2 type device).
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From what I've read about calibrating the battery on other devices (specifically in the EVO forums), you're supposed to charge it until it's full, immediately wipe the battery stats, run it until it's dead without turning it off at any point, then charge it until it's full with the device off. Turn the device on and it should be properly calibrated. I'm not sure if this will fix your problem, but it's worth a try.
If that doesn't work, you could try flashing a different ROM and see if the problem persists (backup everything in clockworkmod first, so you don't lose anything if you want to go back to that ROM). If the problem goes away, it's probably an issue with TNT Lite 3.1.4. If the problem persists, it's probably an issue specific to your gTab.
Thanks guys. Ill give it a go.
Sent from my GTablet-TnT-Lite using Tapatalk
raphenucleus said:
From what I've read about calibrating the battery on other devices (specifically in the EVO forums), you're supposed to charge it until it's full, immediately wipe the battery stats, run it until it's dead without turning it off at any point, then charge it until it's full with the device off. Turn the device on and it should be properly calibrated. I'm not sure if this will fix your problem, but it's worth a try.
If that doesn't work, you could try flashing a different ROM and see if the problem persists (backup everything in clockworkmod first, so you don't lose anything if you want to go back to that ROM). If the problem goes away, it's probably an issue with TNT Lite 3.1.4. If the problem persists, it's probably an issue specific to your gTab.
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I've been having an issue where my battery show that it is discharging but then it abruptly shuts down when it hits ~50%. No warning of low battery voltage.
I'll try this calibration and report back with results.
Update...8 months on.
My G tablet is now running Flashback 10.3 (finally HC is stable enough).
Battery still does not reflect drain, stuck at 100% every time. (i've been told its a kernel issue)
On Flashback 10.3: Looping a youtube video (1hr 14 mins) with HD on, sound off, wifi on, brightness set to automatic in a dark room. Tablet died after 9hrs 21mins.
This is 1.5 hours shorter than the result i obtained when i looped a internal storage video, wifi on, brightness automatic, sound off 8 months back on TNT 3.1.4 (froyo).
I'm pretty impressed given the 3700mAh in our device (compared to most 5000mAh tablets). Anyone done any tests? Do share.
Hmm...well, this is the second time that this has happened in the 2.5 weeks that I've owned this phone. I'm currently running unNamed ROM 1.2.0 and noticed that my battery is draining quicker than usual (8%-10% drain per hour on IDLE).
Usually, my battery drain is between 1% - 2% per hour on unNamed. What I've noticed in both the instances where my battery drains rapidly is that I end up seeing 'Core Apps' (white envelope with android icon in the middle) under the Battery Usage. From what I can recall about this icon, it's the icon for the launcher. CPUSpy shows my phone at 78% deep sleep (the phone's usually around 93% - 95% deep sleep when in idle).
The first time this happened, I was away from home on business for 1 night and ended up having to power my phone off when it got down to 11%. Got home later that day and recharged my battery while the phone was off and after the phone was 100% charged, it lasted 38 hours with 7% left before I powered off and recharged. Again, the battery with light usage lasted 30 hours with 30% left.
Today, after charging (while off - seems to charge better this way) I was surprised to see that my battery was draining at ~10% per hour and I saw that 'Core Apps' was listed under Battery Usage again.
Fortunately, I am not away on business this time (yeah, my spare charger is on the way) so I can recharge teh phone at home. Is the only way to "reset" the phone's battery usage history by pulling the battery or charging the phone?
Hopefully, one of the devs can answer or provide a fix/workaround for the 'Core Apps' drain? (BTW, I leave my WiFi on all the time and my phone still lasts anywhere between 28 hours to 40 hours...just wondering why I have these sporadic glitches when the battery doesn't seem to last long.)
From my experience... this will be very hard to fix. Usually appear ramdomly, and disappear randomly.
amtrakcn said:
From my experience... this will be very hard to fix. Usually appear ramdomly, and disappear randomly.
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Yeah...the 1st time it happened, I was wondering "WTF is 'Core Apps'?"
Now that I've seen this the 2nd time, I'm stumped by it since you're right...it doesn't happen often and doesn't seem to be reproducible by any consistent method.
Hard to do a battery pull with this Neo Hybrid case (case is a PITA to remove) and I don't have my 2ndary charger yet...
Rebooting the phone does nothing since the battery history remains and even powering off for an hour and then powering the phone back on still doesn't clear out the battery history so the drain continues!
Oh well...it is what it is then I guess...I was hoping that someone smarter than I could find a way to cure this. (BetterBatteryStats doesn't show this as a wakelock (partial or full)...CPUSpy just that my deep sleep state is in the mid to upper 70% which isn't the norm.
Oh well, hopefully, this doesn't happen too often.
Wiping battery stats in CWM does reset the battery useage screen.
Adelaide. said:
Wiping battery stats in CWM does reset the battery useage screen.
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But a few have reported their phone doesn't behave right in reporting battery percentages after wiping battery stats.
Doesn't mean you can't. But no one has proven it helps.
Sent from my SAMSUNG-SGH-I777 using XDA App
I haven't had any issues that can't be directly linked to something else (like random reboots).
If all you want to do is reset your battery useage screen to zero it definitely does that. The point isn't to help anything, just to reset the screen to zero without having to wait for the phone to charge all the way.
In that case not a bad idea if you see it show up. If it's as bad of a battery drainer as it seems and still running, it should show up again pretty quick after you clear battery stats.
It'd be useful in reading the logs to know that at a certain time it was for sure running.
Sent from my SAMSUNG-SGH-I777 using XDA App
Have you checked entropy's battery drain thread for ideas?
Sent from my Toshiba THRiVE using Tapatalk
hlb3 said:
Have you checked entropy's battery drain thread for ideas?
Sent from my Toshiba THRiVE using Tapatalk
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Dunno, it's just odd...recharged my phone last night and now I'm back to 1%-2% battery drain on idle and the phone's going back into deep sleep at 93% and I haven't touched any of my settings. I just let the phone dip to 19% and powered off and put it on the charger for ~4 hours (I know, I could've pulled it sooner since it wasn't at 0% but honestly, I forgot.)
It's just the weirdest thing...whenever Core Apps appears as the envelope w/Android icon it seems to be persistent and stays in the battery usage. However, there have been times when the Core Apps appears as teh same icon as 'Contacts' and will disappear on it's own after a while. <-- This seems to be okay as the battery drain remains minimal.
I'll have to check out Entropy's battery drain thread later to see if I can gain any insights. (Haven't ever flashed any of Entropy's kernels as standalones -- I've just been flashing unNamed ROM so I know the kernels are stable builds and not the experimentals.)
Hi,
I have been facing these two weird issues:
1. Sudden drop in battery percentage: I have found that this occurs only when i reboot my phone (not every time though). So when the phone restarts, the battery is down by 20-30% or sometimes even more. And its not a one time issue. I have seen it happen at least 3-4 times in the last 5 months.
2. Sometimes when I am not charging the phone, the battery % keeps increasing slowly. This has been happening lately since the time I have rooted and flashed my phone. 2-3 occurrences that i know. I don't recall seeing this when I was on stock. Just this morning I plugged my phone off the charger at 52% and I left for work. And right now at this moment when I am writing this, the phone is at 58% charge!!
Just FYI.. I calibrate the battery every time I flash a new ROM.
Thanks,
Sam
sammy.samsung said:
Hi,
I have been facing these two weird issues:
1. Sudden drop in battery percentage: I have found that this occurs only when i reboot my phone (not every time though). So when the phone restarts, the battery is down by 20-30% or sometimes even more. And its not a one time issue. I have seen it happen at least 3-4 times in the last 5 months.
2. Sometimes when I am not charging the phone, the battery % keeps increasing slowly. This has been happening lately since the time I have rooted and flashed my phone. 2-3 occurrences that i know. I don't recall seeing this when I was on stock. Just this morning I plugged my phone off the charger at 52% and I left for work. And right now at this moment when I am writing this, the phone is at 58% charge!!
Just FYI.. I calibrate the battery every time I flash a new ROM.
Thanks,
Sam
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I think that Entropy can answer this better but I'll still give a try.
[Q] Why these sudden battery level drops after reboot?
[A] The sudden battery drops is a known 'issue'. It's not a bug, it's the way the fuel gauges are designed for i777.
[Q] How to avoid these sudden battery level drops?
[A] Try not to reboot while it's on battery if the battery level is <50%. In that case, if you need to, make sure that the phone is plugged in for charging and then do the reboot. That should prevent those random battery level drops.
[Q] Will using battery calibration apps help?
[A] No, the way the i777 fuel gauges are designed, there is no need of battery calibration apps. The best way to get accurate battery level readings is to allow the battery to go through full 100%->0% battery discharge cycles for atleast 2-3 times. After each full discharge remove the battery, keep it out for a minute or two and reinsert, recharge the phone.
PS: The weird battery charges that violate E=MC^2 law might have to do with your battery not having been through proper discharge cycles (and thus not having been properly calibrated) after flashing a new ROM.
@Mod These questions are asked many times, how about adding them to FAQs (not sure if that will help though )
@Entropy Please review this post.
Pretty close.
Calibration does nothing on our device - the fuel gauge is designed so that it will always converge towards truth instead of diverging. Also, the "wipe battery stats" method of "calibration" has been proven to do NOTHING on ANY device whatsoever - https://plus.google.com/105051985738280261832/posts/FV3LVtdVxPT - The "charge battery to full" and "discharge/recharge" battery are valid tactics on some devices, but NOT any Galaxy S or S II device (maybe the ****rocket and T989, but not the I9100 or I777.) - There's a slight chance this may change with ICS on the I9100/I777 but not likely.
The advantage of this is that it never needs funky calibration cycles other than "just wait"
The disadvantage is that the gauge will get thrown off in a few limited corner cases - and the "two" issues described are one widely documented one. The gauge gets confused and falseley reports low by heavily battery load immediately following a reset, and takes a few hours to converge back to normality (during which the estimate creeps upward, because it was lower than reality initially).
And yeah this should probably be in the FAQ. I'll work on submitting it this weekend.
Thanks guys..
So looks like the sudden battery drop issue can only be prevented but not fixed!
sammy.samsung said:
Thanks guys..
So looks like the sudden battery drop issue can only be prevented but not fixed!
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It's pretty much the characteristics of putting a battery under load and using voltage to dictate battery level. when you draw a lot of current from a battery you'll usually see the voltage level drop, more so as the battery is discharged. Booting up the phone consumes quite a bit of power, substantially more than the device at idle. So upon start up the device reads the voltage level to dictate battery level. Since the device is under a relatively high power draw, it sees a lower voltage than would be at idle. It in return thinks the battery is lower than it actually is, or would read under idle load. the battery level will actually creep back up slowly because it will read a higher voltage, than it did upon start up.
The only way i could think of to get a more accurate reading would be to delay the initial voltage reading/recording upon start up, or to use the last voltage reading to help dictate the battery level. But i have no idea if that's even possible, or if it would conflict with some sort of other operation.
I just don't get it!!!!!!!
I was playing multiplayer in bombsquad today morning wid my friend .My battery was @ 86% at that time
suddenly my battery came down to 15% then in the other moment it went to0% and mt phone got shut down. I plugged my phone in charge through the power bank and rebooted it and I saw my phone was @52 % I started using my phone and it again suddenly sut down this time without even a battery low message
it's been happening regularly wid my phone since then.
What could be the reason? And what can I do to make it right?
MY PHONE INFORMATION
MODEL:SAMSUNG GALAXY CORE GT I8262
ROM:USING STOCK ROM(ROOTED) (CWM RECOVERY INSTALLED)
avijeetpandey87 said:
MODEL:SAMSUNG GALAXY CORE GT I8262
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This is the wrong forum. Even though the thread is about a problem similar to yours, we don't know anything about your phone.
If you have a removable battery, you might try purchasing a new battery, but that's just a guess.
The forums for you phone are here.
Since Sunday my Aria has started heating up weirdly. When charging and while using, there is tremendous heating in the area right behind the optical touchpad.
Also the battery is not charging properly and discharging quickly.
I first thought it may be a battery problem, but wanted some genuine views regarding this.
Will changing my battery remove this issue? Has anyone faced anything similar?
There will always be heat around the touchpad whenever you are charging while using it. Happens to me all the time at least. Unless your battery exceeded 45 degrees Celsius, then that's abnormal.
You can track your battery stats for example, heat with apps in Market.
You said it discharges awfully quickly. Mind telling me, how long does it take for it to discharge from 100% to below 10%?
Really quickly.
For example, I charged the phone whole night from a wall charger, while switched off.
In the morning, I turn on the phone, it shows me 19% battery. I rebooted: 8%. Rebooted again: 2%. This all happened in about 5 minutes after taking the phone off the charger.
The phone used the 2% battery for about 15 minutes on standby, with no internet, before dying.
Now it does not even turn on. The battery is definitely gone, since it has bulged a bit. But I want to be sure before buying a new battery, if the new battery will face the same fate or not.
For now, I have given the phone to my brother who will test the battery in his phone. Let's see.
There's definitely a problem with the battery. It is advised you do not charge a faulty battery. It may damage your device or worse, explode depending on what the fault may be.
plade said:
But I want to be sure before buying a new battery, if the new battery will face the same fate or not.
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New battery should fix the problem. There's no reason to suspect that the phone is causing the problem.
I have been using the Pixel 6 for the last 4 months. The experience was pretty good till I faced this battery issue. All on a sudden, the battery gets drained by each percent in 2-3 seconds and consequently, it gets shut down in less than 4-5 mins. I have tried factory reset but the problem still persists. Its getting annoying day by day. What can I do now?
going to need a lot more info.
i would wipe the phone and start adding your apps back one at a time, use a battery useage monitor like accubattery or betterbatterystats or other ones.
likely something is a battery hog or you have battery issues. a battery app may tell you which.
It's likely that a badly behaving app is killing your battery. There's some useful info under Battery Usage in Setting that could tell you what's killing your battery. Or you could install Accubattery for more info. Either one may help you narrow it down.