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My original device always seems to take forever to go below 100%, and I just got a new device that has the opposite issue - it never goes above 94%. So I did some further tests, tonight.
My 94% device goes down fairly steadily once unplugged. But, the device at 100% does not. Also, when the 100% device is drained and I recharge it, it still says it's charging when its at 100% - so what does this mean?
I think that the battery calibration is off, as we already assumed. So, my 94% device is really 100% and I suspect that it would survive beyond 0% as it probably still has 6% juice left in reality. And, in the case of the 100% device, it's probably mis-calibrated to 105 or 110% (or more?). Since the UI can't show you 105%, it just shows the max of 100% until it goes below 100% which can take some time. I also suspect that the device would cut out at 5% or 10% since it's actually drained completely.
So that's the reason, I think. As to the fix, I don't know. What's weird is that these two devices are so different in terms of how the battery status is calibrated.
How can this be fixed? Or "Recalibrated?
I'm letting one of them completely drain, to see what happens.
At least the 94% one gives me an idea on what the battery life is, since I can just tack on +6%. But the one stuck at 100% is a complete mystery - it could be 5% off, 10% or even more.
Also, these run on 2 cell batteries making 7.4V nominal. All the devices before are using single cell batteries at 3.7V nominal. So Android may have issues with that voltage difference.
roebeet said:
I'm letting one of them completely drain, to see what happens.
At least the 94% one gives me an idea on what the battery life is, since I can just tack on +6%. But the one stuck at 100% is a complete mystery - it could be 5% off, 10% or even more.
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Click to collapse
I had the 100% battery issue before and it took a long time for it to dip below 100% (so long that it seemed unreal). Later I decided to let it drain to zero before recharging it to full again. Since then the battery indicator seemed to behave normally and discharged at a normal rate when the tablet was in use.
Have you tried deleting /data/system/batterystats.bin to wipe battery status? Mine sits on 100% for ages so I'm trying this now.
roebeet said:
My original device always seems to take forever to go below 100%, and I just got a new device that has the opposite issue - it never goes above 94%. So I did some further tests, tonight.
My 94% device goes down fairly steadily once unplugged. But, the device at 100% does not. Also, when the 100% device is drained and I recharge it, it still says it's charging when its at 100% - so what does this mean?
I think that the battery calibration is off, as we already assumed. So, my 94% device is really 100% and I suspect that it would survive beyond 0% as it probably still has 6% juice left in reality. And, in the case of the 100% device, it's probably mis-calibrated to 105 or 110% (or more?). Since the UI can't show you 105%, it just shows the max of 100% until it goes below 100% which can take some time. I also suspect that the device would cut out at 5% or 10% since it's actually drained completely.
So that's the reason, I think. As to the fix, I don't know. What's weird is that these two devices are so different in terms of how the battery status is calibrated.
Click to expand...
Click to collapse
samepic said:
I had the 100% battery issue before and it took a long time for it to dip below 100% (so long that it seemed unreal). Later I decided to let it drain to zero before recharging it to full again. Since then the battery indicator seemed to behave normally and discharged at a normal rate when the tablet was in use.
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Click to collapse
I tried that once, by setting it to never shutoff and letting it go over night. The next morning I charged it to green plus 30m as someone suggested in the TnTL thread, but I still had the problem of the meter sticking at 100% for a long time.
Anyways, I installed 3.0.0(TnTL) on monday and decided to also use the CWM clear battery data option, and now it seems to be dropping more as expected, but I'm not entirely sure that I did it completely correctly as by the time that I did the clear battery data option it would've been below 100% charge since I did so AFTER running the update.zip... just have to wait and see now...
Battery Stays at 100% For Ages
My battery stayed at 100% for ages the first time I charged it. Then it dropped quickly and cut out around 50%. I recharged it and it seems to be behaving more normally now. It still seemed to hang at 100% for a while, but no where near as long as the first time. I'm waiting to see at what percentage it dies this time.
my zt 180 tablet never got above 94% also. And it dropped pretty quickly and at around 40% it seemed to get a second life and slow down, but eventually it went all the way down to about 10% and then I would charge it (about 3 hours max). It too is a 7.4v supply.
My Odroid T had a 3.4 supply and it was pretty linear, showed charged at 100% and went down accordingly, though the developers had some issues with a few software releases where it did behave erraticaly and they did a few patches that fixed it.
roebeet said:
My original device always seems to take forever to go below 100%, and I just got a new device that has the opposite issue - it never goes above 94%. So I did some further tests, tonight.
My 94% device goes down fairly steadily once unplugged. But, the device at 100% does not. Also, when the 100% device is drained and I recharge it, it still says it's charging when its at 100% - so what does this mean?
I think that the battery calibration is off, as we already assumed. So, my 94% device is really 100% and I suspect that it would survive beyond 0% as it probably still has 6% juice left in reality. And, in the case of the 100% device, it's probably mis-calibrated to 105 or 110% (or more?). Since the UI can't show you 105%, it just shows the max of 100% until it goes below 100% which can take some time. I also suspect that the device would cut out at 5% or 10% since it's actually drained completely.
So that's the reason, I think. As to the fix, I don't know. What's weird is that these two devices are so different in terms of how the battery status is calibrated.
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Click to collapse
Warning: Slightly off topic -
I'm glad Roebeet was able to get a 2nd Gtab. Hope you found a good discount. Happy Holidays!!!
Now back to the topic discussion...
Butch1326 said:
Warning: Slightly off topic -
I'm glad Roebeet was able to get a 2nd Gtab. Hope you found a good discount. Happy Holidays!!!
Now back to the topic discussion...
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Click to collapse
Off-Topic x2 : yep, got used one that another XDA user had returned!
On-Topic: Still waiting for the battery to discharge, it went to sleep last night. Getting close....
roebeet said:
Off-Topic x2 : yep, got used one that another XDA user had returned!
On-Topic: Still waiting for the battery to discharge, it went to sleep last night. Getting close....
Click to expand...
Click to collapse
I also had the issue of battery showing 100% for a long time and then cutting out around at 50%. One of the posts mentioned doing a battery stat wipe in CWM after charging to 100% + 30 minutes.
I did this with a little twist of my own.
I allowed the battery to drain completely and tab to shut off. Plugged in the charger and immediately did a battery wipe in CWM. Allowed the battery to charge fully upto 100% + let it be on charger for additional time till the battery symbol in the notification bar no more showed charging sign. Again did the battery stat wipe in CWM and then rebooted the tab.
Since then i observe that the battery has been draining as it should be expected to. down to 72% after about 4+ hours of use. I will still be monitoring the battery discharge further for two or three more charge cycles. But I feel doing battery stat wipe in cwm 2 times at full drain and then again at full charge might have helped caliberate it properly.
Let me know if anyone else tries this and gets same or different observations.
Try installing this to measure your current usage over the life of the battery... (dont have a GTab and still considering). Since most likely this widget and the battery monitor are using the same API we will see if its a hardware sensor issue or a software issue...
http://www.appbrain.com/app/currentwidget/com.manor.currentwidget
I suspect its in their battery monitor and not the sensor or API... if that is the case it should be easy to debug (if you have the source). Typically these issues are due to poor polling algorithms...
Im new to android so I am unfamiliar with profiling capabilities of the platform...(Still learning)
Perhaps this will be one of the 'little fixes' that will be present in the latest FW update when VS drops it tomorrow. I have the 100% unit BTW. A fix would be nice.
Reading this thread this morning it got me thinking about my gtab battery situation. When I first got the gtab, the battery stayed at 100% for hours, then the percentage dropped like a rock. Over time, the battery dropped in more regularly, although it drops in large numbers (like from 100% to 83%, then to 67%, and so on). I'm currently running TnT Lite 3.0.
This morning I charged the battery to 100%, and while plugged in (to the AC outlet), I reset the battery stats using cwm. The battery today has been steadily going down throughout the day as I would expect. In over 8 hours, I watched the battery go down steadily from 100% to 84%. So far, so good.
my exp
Tried draining once, just let it sit, didn't fix it.
Tried again but this time I kept the screen on and watched the voltage, shutdown was near 6.8 volts. Now the meter is accurate. YMMV...
@it'sDon - it wasn't fixed in the update.
I was in the same boat as most of you. Took a very long time to go down from 100% and then zonked out completely at ~10-15%. It's now been charging for a few hours and it's been sitting at 100% for quite a while but the light is still red (so it's still charging) which means it will probably happen again looks like it's charging to some value over 100% and when it discharges, knocks out while the meter is still reading as having juice. Roebeet is 100% on the money.
I am going to try the CWM battery value reset some of you mentioned to see if it does something once my light is green, then I won't charge it and watch it like a hawk once it hits 20% to see if it shuts down at 10-15% or a value less than 3% which is acceptable I think.
I never had a problem on my stock(ish) g-tablet. That is until I installed the latest update.
I had to do a data wipe before any of the cosmetic TnT changes would show. After that the battery now seems stuck at 100%. This wasn't that way before, so I will try draining the battery, and see what happens.
Since I found that this was tied to my latest update, I think that I should call CS and complain.
My battery drain didn't make a difference, either. Still haven't pinned down a fix that works.
At least those of you with 94% max have a general idea when your battery will die. With us "100% forever" ones, we have no clue.
Actually, I may not have a problem after all. I have had my tablet on for about two hours. It is now showing the battery at 86%.
Has anyone noticed their battery life seems shorter since the update ? I installed the official froyo update last night and it seems I'm running out of juice much quicker than before.
At first mine ran down faster. I ran it all the way down. Charged it. And ran it all the way down again and charged. It seems back to normal.
I didn't have any issues. Maybe you changed something else as well? Could always try a few recharge cycles and see if it stabilizes..
I was running the leaked 2.2 and I flashed to official 2.2. My battery life is almost double what it was. I can't complain one bit about battery life, although I have other gripes with the official Froyo release.
I'm with icepop on this one.. I was running the stock rogers rom pre-update and now with the official rogers 2.2 I'm getting at least double the use before having to charge again.
I'm having battery issues with the new stock Froyo. I lose a huge amount of juce when in standby. I thought I may have my widgets updating too often so I charged it up and put it into airplane mode last night. The phone lost about 1% per hour in airplane mode. IDK what is normal but that seems like a lot to me. I didn't have any apps running, except my alarm was set for the morning.
I have SystemPanel installed and my cpu load NEVER goes below 10 percent, even in airplane mode. I suspect this is a large part of the issue. In app history, system and system processes are always on the top of the list and are around 3% each. IDK what controls this or how to lower it. I would love some feedback from someone else with SystemPanel just to see how our numbers compare. Overall the battery life I'm experiencing is pretty terrible and a buddy of mine's Fascinate has much better battery life (hence something must be wrong somewhere). He and I were skiing all day over the weekend and when we got back to our cars, my phone was half dead and his had lost almost zero juice. This displeases me.
mine's was better actually. but i didnt stayon it for long
My initial results with 2.2 were very bad (10% drop per hour when idling). I reset the phone back to 2.1 then re-installed 2.2. This did not help. Now I did this again (2.1 then 2.2) but this time I have not re-installed my apps and have not rooted (yet). So far, battery life seems to be normal. I suspect that some of my applications might mis-behave when installed on 2.2. I am planning to add them slowly and watch the battery.
Not here, seems the same to me
Mine is terrible ! I don't know what it might have been on 2.1 as I upgraded fairly quickly. Essentially I charge all night and then disconnect from power at 6:30am and then by 4:30pm I'm out of juice (phone shuts off). Any ideas here? I'm not running anything extravegant (email only) and hardly make any calls.
Whenever you flash to a new ROM, wait for at least a week of normal usage before you judge the battery life. The reason is simple, your battery stats are reset after ROM flash and your new OS needs time to learn how your battery drains before it can give you accurate readings.
If you can't wait for that long, you need follow the battery calibration thread to force a manual calibration of the battery.
I'll give it a week and see how it is then. Definitely is draining much quicker now though. I think It acted similiarly when I first got the phone as well. If I recall correctly the batter life sucked when I first got it, but then a week or so seemed to get much better.
I did the manual battery recalibration (let it die, charge while off, turn on and bump charge...etc). Last night I lost about 2.5% of battery per hour while in standby. This seems improved since calibration but its still pretty terrible IMHO. Is this in line with the amount of drain other are getting or am I draining more than usual?
TheSopranos16 said:
I did the manual battery recalibration (let it die, charge while off, turn on and bump charge...etc). Last night I lost about 2.5% of battery per hour while in standby. This seems improved since calibration but its still pretty terrible IMHO. Is this in line with the amount of drain other are getting or am I draining more than usual?
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Click to collapse
Running stock since purchasing the Captivate back in August, and so far battery life actually seems to be routinely as good if not better than 2.1. I must admit I didn't use my phone a huge amount yesterday (except for about an hour plus of downloading a bunch of wallpapers off Zedge for some ungodly reason lol), and after 18 hours of the phone being on I was still over 50% battery life left. 2.5% in standby doesn't sound like all is well - you must have something running in the background or similar issue. I have a live background, sync 5 e-mail accounts (granted, only one of those is every 15 minutes - the others are every thirty minutes, every hour, and once a day on two of them), and with light use I am getting over 40 hours with 2.2 so far (about in line with 2.1, but seems maybe just a little better). Heavy use I am dropping more like to the 12 - 18 hour mark (heavy use for me means the screen on more than off, actively playing games or using apps, large amounts of texting, etc. Solid game playing I haven't figured out a drain yet, but on some games it seems like I can drop almost the whole battery in close to 10 hours). At your rate of 2.5% per hour in standby you would only make it forty hours without even using the phone. I have been using mine just a little this morning (FB check, logging in to one of the desktops at work remotely to make some changes, live background running, WiFi sleep policy is set to when screen is off, but to be honest that is about it) and I haven't moved off the 100% mark yet and the phone has been unplugged over an hour and a half.
All that said though, as other users have stated you might want to give it a little more time for the system to recalibrate the battery usage. I would definitely check your processor usage though regularly to see if anything seems 'off'. One thing that caused me problems was that my SNS service would be running but then would get stuck in a pattern of 'Restarting' - would drain my battery rapidly.
It has been said that bettery drain is not linear. First 5% goes real fast. So, you need to judget the average over a day of use, not first hour or so. I'm still in first week of ROM flashing. So I can't confirm anything yet.
See my battery stats recalibration steps here:
http://forum.xda-developers.com/showthread.php?t=765656
Also, TheYar has a great write-up on identifying battery drain issues here:
http://forum.xda-developers.com/showthread.php?t=806211
I got an S7 G930F yesterday, first full charge last night, I haven't it even properly set up yet, haven't got most of my apps installed yet. I took it of the charger this morning at 8am its now at 50% at 2pm, 45 mins screen on time with the biggest battery drain being android system 20%.
I have hardly used the phone today as I'm off work, at this rate it'll be dead long before bedtime with me doing nothing.
Any ideas?
Hard to expect getting the best of it at first. It took me a good week to figure out how to optimized battery without having to use it like a 2G phone. I suggest you do factory reset. Observe how it goes that way. For the first time, a handful of things run in the background; syncing, location, whatsoever so I bet it'll take a while to really adapt and I can assure you based on experience, it's like that as it was like for me.
slugger09 said:
I got an S7 G930F yesterday, first full charge last night, I haven't it even properly set up yet, haven't got most of my apps installed yet. I took it of the charger this morning at 8am its now at 50% at 2pm, 45 mins screen on time with the biggest battery drain being android system 20%.
I have hardly used the phone today as I'm off work, at this rate it'll be dead long before bedtime with me doing nothing.
Any ideas?
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Click to collapse
Always takes a few full charge cycles to get the best out of a new battery I find, fully charge and fully discharge 4-5 times, calibrates the phone too to know what 0% and 100% are iirc
But you're always going to see high battery usage setting up a new phone, installing apps, screen on constantly, playing about with it more than you will once you've had it a while
The are wide reports today of crazy bad battery life. Some people are tying it the latest Oculus update.
*Detection* said:
Always takes a few full charge cycles to get the best out of a new battery I find, fully charge and fully discharge 4-5 times, calibrates the phone too to know what 0% and 100% are iirc
But you're always going to see high battery usage setting up a new phone, installing apps, screen on constantly, playing about with it more than you will once you've had it a while
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Click to collapse
I'd like to believe that but I didn't have this issue on my Nexus 5X with a smaller battery or Huawei P9 Lite, in fact the P9 Lite also has a 3000mAh battery and I could make it last 2 full days, this won't last 1.
Getting the phone yesterday, you've hardly given it a chance, with heavy usage I get just over a day with mine, with medium, 2 days
Same phone, same OS, same battery
See how you get on in a week or two, or return it and get the Edge, 3600mAh
Check the package disabler pro threads, disable the battery draining bloatware (no root needed)
*Detection* said:
Getting the phone yesterday, you've hardly given it a chance, with heavy usage I get just over a day with mine, with medium, 2 days
Same phone, same OS, same battery
See how you get on in a week or two, or return it and get the Edge, 3600mAh
Check the package disabler pro threads, disable the battery draining bloatware (no root needed)
Click to expand...
Click to collapse
Yep thats the usage I got with my P9 Lite with the same size battery. I was sitting this morning look at the phones always on display. 30mins of the charger it was at 94% and that's with me not even touching it.
It's crap for the first few days
Whenever I first got my phone or when I factory reset or when I install new rom, the battery life is usually crap. But after a few days when battery optimization kicks in (power saving on apps not used in past few days) battery gets tremendously better.
Posting back to confirm that Oculus update shat on a lot of phones.
Oculus home process kept trying to install and uninstall. This demolished battery life, increased heat, etc.
Once I uninstalled Oculus, all problems went away. I will reinstall after fix.
This may be caused by either the oculus app or good lock app they have been reports on the Internet about these two particular apps
Also when setting the phone for the first time it will drain battery in the first few days
Confirmed about Oculus draining battery
http://www.androidpolice.com/2016/0...p-samsung-phones-causing-heavy-battery-drain/
NH Apache said:
The are wide reports today of crazy bad battery life. Some people are tying it the latest Oculus update.
Click to expand...
Click to collapse
Definitely was, my phone overheated and shut down over night when the update came through. I literally couldn't charge it it with fast charger. it would just sit at the same % it was burning through the battery so quickly. uninstalled sammy vr and oculus apps everything fine now.
I don't have anything oculus related installed. The is day 2, second full charge last night. Of the charger now 1 hour, its got flight mode on with wifi calling enabled. I am currently at 90% with 1 min screen on time. Android services again the biggest hog but it contains IPSec services which does the Wifi Calling part.
I was about to remove Occulus when I received an occulus update, about one hour ago, and it seems that the problem is fixed. The battery looks ok, and the phone is not hot any more. I'm waiting a little bit more to be sure...
Right guys I have found the culprit of my drain issue. Wifi calling. I happened to turn it off and I have gone from 10% drain in an hour to 1%
That's more like it, never used WiFi calling so wouldn't know if it causes drain
EDIT - Not available with my model / carrier
There's a debloat script back in the Development Section which will remove all those trash that came with the phone, as for battery optimaztion This Ultimate Battery Guide is one of the best here in XDA and is a must see for anyone with an android phone basically
Goodluck
Hi everyone,
I have a Leagoo T5c with a more-or-less 3,000 mAh non-removable battery, and for the past few month, battery life has been somewhat erratic. The phone would go from, say, 50% to 10% battery in no time, and I would get the low battery warning, but at other times it could hold at around 45% for a while before really going down for good.
Last night around 8pm my time, the phone went completely dead while the battery indicator in the task bar said I still had about 65% left.
I tried what's described here and there as battery calibration: I left the phone turned off, patiently waited a couple hours (yes, yes, that long) for the battery to reach 100%, then left the phone off for another hour before turning it on.
In a matter of minutes doing nothing more than checking my Twitter TL, the battery went from 100% to around 85%, and was still there went I tucked in for the night, leaving the phone in Airplane mode as I always do at night.
This morning, I turned Airplane mode off and the battery said it still had 82%, which means minimal drain during the night, with all radio off.
Just a few minutes ago, the phone went completely dead after the low battery warning, and the battery held less than 10% charge.
WiFi is off, cellular reception is very good where I live, and anyway, I don't see how LTE could kill 70% of the battery charge in less than half an hour, even if reception was spotty, which it's not.
I plugged the phone into the charger it came with, put it in Airplane mode again, and it went from 10% to 70% just now in less than 30 minutes.
I know for a fact that fast charge isn't supported on this phone, at least not with the OEM charger, plus it has micro-USB, so I doubt the charger can feed it that much juice in so little time.
The charger itself seems to work fine: It never gets hot while charging, not the Leagoo, nor my old iPhone 6, since I use it for both devices.
So, long story short, is there a way or tool to ***really*** know what state that battery is in? I've tried both DevCheck and CPU-Z, and both say that the battery is in good health, and still retains its nominal capacity of more or less 3,000 mAh, but I have my doubts about that.
I think the battery capacity is reduced somewhat, and I need to know by how much.
Any help and input would be much appreciated!
I must add that I flashed a stock ROM on this phone (yeah, again...) a few days ago, so maybe it's the ART cache being replenished that's causing my battery issues, but still, the problem is so inconsistant that I don't know anything anymore...
I had to flash the stock ROM again after trying (again...) to root the device (successful, but doesn't bring anything of value) and finding it barely responsive.
I'm gonna leave the phone as is, ROM-wise, but my battery is still a matter of concern, because it dies on me at the 60-65% mark more often than not, though two days ago I let it drop to 30% without the phone shutting down.
Like I said, it comes and goes. I really need to know if that battery still retains its nominal capacity or not. Any help in that regard would be most welcome...
I have a lot of trouble with the battery on my S7. Shortly after updating to LOS 18.1, it started behaving very strangely. The battery degradation happened over a couple of weeks, so it rapidly got worse.
At the beginning it shut down at anywhere between 15 and 20 percent, most of the time with the 15% warning. It got worse over time, then at some point it switched to being stuck at 80+ percent for almost the whole day, draining very little battery and then it just went black in the evening, like if the battery was pulled out.
I started slow charging the battery, which made things a bit better again. Now the percentage seems to be somewhat accurate again, but battery is draining so fast, I have to charge it twice a day to keep it running. It even drains battery while off, like yesterday I turned it off at 35% and this morning I couldn't even turn it on. Sometimes it also jumps from 100% to 60% after a reboot.
I made a backup and tried resetting the system, which didn't work, same behaviour. I could try to go back to stock, but as it also drains battery while off, I'm not too confident that it will actually make a difference.
As I have another disassembled S7 still in my repair drawer, I could try to change the battery, but my glass is a bit shattered at the bottom of the touch screen, so I'm afraid I'll completely break it this way.
I don't think there is much I can actually do, but I wanted to ask you people for any advice.
Edit: I have successfully transplanted the battery from my other S7 and it works great again. No battery problems at all, so the culprit was a faulty battery.