So my SGS2 is about a month old and lately, it has been draining rather quickly. I decided to take out the battery and reinsert it. I noticed my battery level had dropped about 20%, but it fixed the problem for a couple of days. Now, I have to take out the battery every day in order to get it to last past 8 hours and the percentage of battery left drops about 20% every time (i.e. before taking the battery out, I'll have 80%, when I reinsert it a minute later, I suddenly have 60% or so). Do you think this is a faulty battery or faulty phone issue? Also, I have not done any software updates on the phone if that makes any difference.
maybe be faulty hardware.... BUT
have you installed any new apps lately? check out the general section for common causes of rouge apps causing battery drain. also its the fuel gauge for our phone. entrophy has mentioned countless times that random percentage drops are due to it
Please use search.
There are lot of threads talking about
- BetterBatteryStats
- CPU Spy
- fuel gage
- fuel gauge
- drops
- battery
- battery level
- reboot
Search for these and you shall find your answer.
Sent from myphone.
Related
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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Click to collapse
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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Click to collapse
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.
Hello,
So my problem is that the battery is charging & discharging very fast. Charging takes about 1.5 hour from ~0% to 100%, so 1%=1min. It isn't normal, I've had this problems some times. For the last time I'm charging it every time I can, so I don't care if the battery is low. You think this is the reason. I've already did the calibration but didn't help. For now my only idea is to charge it only when the battery is almost empty. Did You had such a problem already?How did You solve it?
PS. Happens on every ROM now
I had that exact problem with my g/f's x10i. Normally it was because of an app that was misbehaving and I'd just uninstall it. Just check ur battery info and see what the culprit is. Ideally you should have like screen as top process, cell standby and phone idle most likely following (in general that is). I still hav some problems from time to time but worst case the battery gives me a full day. You can also wipe battery stats in recovery and try the "manual recalibration" that is letting it un completely down (not even vibrating when you try to power on) and then charge to full, then repeat. Did wonders for me on the x10i and my xperia play. Really hope this helps man, I know how frustrating it can be.
Hit thanks if I helped!!
Just read that it happens on every rom. Battery may be bad but still try the battery wipe from xrec and charge with it off. Calibration never hurts. GL
Jakuburban, have you checked if there is not any software causing memory or CPU huge consumption present? Remember we have solved it in your another thread... but to ensure for it
Also, there might be two another problems:
1.) battery lost its capacity rapidly (might cause after e.g. 2 years of huge usage)
2.) hardware issue - there might be present "parasitive resistance" somewhere on the battery pads or on PCB traces. Which can drain battery everytime.
No, none of the programs is battery unfriendly. It's not gettong hot and the screen usage is on the top as You say.
@HeliumX10 I remember that problem but it's different now. CPU usage is allright. It's just charging and discharging to fast. E.G. my brothers SGS2 is charging about 4 hours to full and he can use it all day long. My battery is charging in less than 2 hours and I can only use it for 1/2 of a day. It's like it is charging only half of the battery ( capacity) and it shows that it is full.
Sent from my X10i using XDA
I ended up buying 2 extra batteries and an external charger off of Amazon for $12. I never plug it in.
Sent from my SGH-I727R using xda premium
I have a battery reading issue on my Motorola RAZR. Whenever I use a ROM with one percent battery mod, two things happen:
a) It stops charging at 95-96 % (says "full") Not really an issue, if I leave it longer it eventually goes to 100.
b) Dramatic 10 percent(ish) drop. One second it'll be on 27% and then it'll drop to say, 19. It only does this once per charge, and I don't think it's ever at the same level when it does it.
Why does this happen? Is it common? Web search had no answers.
And please don't tell me to calibrate my battery. Not only is that a debunked myth, but I've tried it several times (through an app, and manually through recovery) and it hasn't worked.
Responses are appreciated
Anyone?
Sent from my Nexus 7 running CM10
Strange battery readings are not unusual after flashing a new rom. I've seen sudden big drops. I've also seen increases in my battery percentage. Eventually after several charging/discharging cycles you should get more accurate battery readings and you shouldn't see such strange behavior.
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.