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Phone doesn't detect battery level correctly

One day i was found that my magic isn't charged fully - charging level is stuck at same % (say 66%) although charger was plugged in during all the night.
Beginning from this moment the phone doesn't detect battery level correctly and don't charging up to 100% nor when it is on nor when it is off. For example it can show me one value but after reboot shows differently another value (for example was 46% but after rebooting is 8%, or in some cases battery level can be even more, than before i performing reboot - say was 22% but after rebooting is 78%).
I'd tried wipe, erase system partition and re-flash rom, flash another roms - all without any luck. So i decided that my battery is died. But when i got a brand new battery (from another just bought magic), i got the same issue as in case of my battery. Also another magic works perfect with my battery.
It appears that problem in the phone itself? Anybody got the same issue?

intruders said:
One day i was found that my magic isn't charged fully - charging level is stuck at same % (say 66%) although charger was plugged in during all the night.
Beginning from this moment the phone doesn't detect battery level correctly and don't charging up to 100% nor when it is on nor when it is off. For example it can show me one value but after reboot shows differently another value (for example was 46% but after rebooting is 8%, or in some cases battery level can be even more, than before i performing reboot - say was 22% but after rebooting is 78%).
I'd tried wipe, erase system partition and re-flash rom, flash another roms - all without any luck. So i decided that my battery is died. But when i got a brand new battery (from another just bought magic), i got the same issue as in case of my battery. Also another magic works perfect with my battery.
It appears that problem in the phone itself? Anybody got the same issue?
Click to expand...
Click to collapse
Me too....

did you try wiping battery stats (from recovery)?
I'm not sure if this is supposed to done from a full or empty battery though

adavis159 said:
did you try wiping battery stats (from recovery)?
I'm not sure if this is supposed to done from a full or empty battery though
Click to expand...
Click to collapse
That is what i waa going to say, but I'm sure it doesnt matter what level your battery is when you do this aslong as it doesnt die during the process. Anyways you could have a faulty phone reading the levels wrong if changing roms and doing this doesnt work.

luminiz said:
Me too....
Click to expand...
Click to collapse
I found several similar cases on this forum but no one answer that actually explain what and why it happens.
In my case i got this issue after performing battery calibration procedure. Maybe is just coincidence, i don't know.
adavis159 said:
did you try wiping battery stats (from recovery)?
Click to expand...
Click to collapse
Yep, of course i tried do this from recovery and manually deleting battery stats file - both with no luck. Also during rom flashing battery stats also was erased.

Tried un-root my phone by flashing Android 1.5 from MT3G - issue isn't disappear. After a week maximum detected battery level is falling down and i can't get even 40% of charge. Now, two weeks later, maximum charging level is only few %. Damn it

[Q] Battery Drain

I´ve just come back from a two month expedition on Borneo. But when i got back to civilization and turned on my trusty N1 I quickly realized that my battery performance has dropped significantly. Before I usually had one day of heavy use (including Wifi, 3G, tethering and GPS usage), but now I only have about 7 hours standby with everything except GSM turned off. Which renders the phone useless for my (normal) use. The phone actually consumes so much power that the battery level drops while charging. The only way to charge it up is to turn the phone completely off.
I flashed the RoDrIgUeZsTyLe™ MIUIMOD -ROM before I left for my trip, so I thought maybe that was the problem (some bug i the kernel or something), so i flashed back to CM6 with no success. I have also tried a new battery.
Anyone knows what can be the cause?
All help is deeply appreciated --- I miss my good old N1!
I accidentally placed this in the wrong section - can anybody move it to Q&A?

Try the battery app in my sig to pull your battery values, then post in that thread and one of us can help you see what's happening with your battery.

maybe the charger is the problem?
Just throwing it out there... I've seen it happen for Laptop users...

Try the battery app in my sig to pull your battery values, then post in that thread and one of us can help you see what's happening with your battery.
Click to expand...
Click to collapse
Voltage (mV): 4035.84
Current (mA): -464.98
Temp (C): 30.2
Percent: 90
Batt age: 94
Full40(mAh): 1452
Min Chg Curr(mA):80
Min Chg Volt(mV): 4099
Empty Curr (mA):200.0
Empty Volt (mV): 3.426
Capacity(mAh):1273
Aged Capa(mAh): 1393
BTW...I have also tried several different chargers without any success.

Hi,
I had similar problems with my rooted N1 with stock Froyo.
The problem for me was a radio image older than regular. Baseband version should be something _4.06 or higher.
You can check this information in Settings ->About Phone
Sent from my Nexus One

Fulvio Minichini said:
Hi,
I had similar problems with my rooted N1 with stock Froyo.
The problem for me was a radio image older than regular. Baseband version should be something _4.06 or higher.
You can check this information in Settings ->About Phone
Click to expand...
Click to collapse
I got 32.41.00.32U_5.08.00.04 so it doesn't seem to be old, but I'll try to update the radio anyway with a custom stock rom from modaco. Will let you guys know if it helps
Update: I'm now back at *****_4.06****. No change

My first thought is: what level of power did you leave your battery with before you went away?
Lithium batteries are permanently damaged if the voltage drops below a certain level. Leakage will mean that any battery left for a while will lose charge.
Therefore, if you leave a battery with close to zero power left for a long time, leakage can mean the charge level drops below the critical minimum level and the cells become damaged.
As such, it is recommended to never store lithium batteries with below 40% charge, and to store them in a cool environment, since leakage is faster at higher temperatures.

Yeah, that was my first thought too, since I forgot to turn it off before I left (the phone was stored in a room with AC at least). However, I have now gotten a new battery and it doesn't help...
I have tried to check if there are any programs that are running in the background that draw unnecessary power, but i cant find any ---at least not with system panel. The cpu-load also seem to be normal.

Anyone got some ideas?

Thats really wierd... The only thing you can do is reflash the radio and flash it to stock. Then use the new battery and charge it overnight - so it overcharges slightly. Let it totally drain till the phone turns off, and repeat a coupla of times. Ignore the levels reported by the phone.
See if it starts to behave normally after that. If not you either have another dud battery or there's something wrong with the charging circuit in your phone.
If you have a friend with an N1, you could try charging your respective batteries in your phones, then swap batteries. See how much time each phone lasts

Thanks for the tip.
I'll try that before I buy a new cellphone.

[Solved] [Help] Phone incorrectly shows battery level at 1%

Hello,
I have a Motorola A953 UK version, with CM7.2 Nightly Endless7 ROM (CyanogenMod-72-111120.2013-NIGHTLY-Milestone2-ICS-v1.0 by Endless7). I had no problems with battery level (except it seldom reaching 100% when charged, stuck at 99%), until recently I tried to calibrate it with Battery Calibration app by Marosige which was included with the ROM. It did threw some messages at me, when I told it to calibrate the battery. Unfortunately, the messages were in Chinese, so excuse me for not transliterating them here. No success with calibration. After using the app my phone after booting up claims to have 50% battery (no matter how high was the level it reported when turned off), which quickly falls to 1% and stays at that level for 10+ hours (probably could work longer, I didn't let it run out of electricity. I was out of patience)
Then, I've tried other calibrating approach as described in following links:
http://forum.xda-developers.com/showpost.php?p=11803458 (could not manage to boot up phone with battery taken out)
http://forum.xda-developers.com/showthread.php?t=978090
The second link resulted that the phone after being turned off and plugged to charger:
- charged to 100%
- after battery being taken out and put in again reported 50%
- charge level raised from 50% to 72% in about 8 hours and stayed at that level for next 8 hours
- after phone being switched on, reported level quickly fell from 49% to 1%, reported voltage > 4.1V
Atm, after 5 hours of work on battery, reported voltage: 3.87 V, battery state: good. Battery didn't go hotter than usual at any moment.
In the meantime, I removed the aforementioned calibration app included with the ROM, in hope that reinstalling it from Play Store will result in messages being in more comprehensible language. Unfortunately, now Play Store claims that attempting to install that app back is "incompatible update" (rough translation). App link: https://play.google.com/store/apps/details?id=com.nema.batterycalibration
I did search for the problem, both with build in search engine, and with google. If I missed a thread about it somewhere, sorry. Really. I hate creating account for asking for support. I would even more, if it turned out the solution is already somewhere out there, in the interwebs.
So I guess, help? Please?

Solved. I took a strip of insulating tape, and covered the two middle contacts on the battery. Booted phone, [!] icon show instead of battery level, reported temperature -40C. Turned phone off, removed insulation, booted up, reported charge - 99%. Looks good so far.
Thanks for your help.

OhJeez said:
Solved. I took a strip of insulating tape, and covered the two middle contacts on the battery. Booted phone, [!] icon show instead of battery level, reported temperature -40C. Turned phone off, removed insulation, booted up, reported charge - 99%. Looks good so far.
Thanks for your help.
Click to expand...
Click to collapse
Can you please explain a little about how did you get to this process?
If I understood correctly, you blocked the io pins from the battery, which are responsible to give the SO info about battery levels.
This forced the SO to "recalibrate"? Maybe erase the battery stats?
Thanks

First of all, I learned that batterystats.bin is a red herring and has nothing to do with displayed charge level. That means that the problem is either cooked battery or battery-phone communication. Then, I found a thread on a similar issue by some hardly-literate guy. The solution that more or less worked for him, was insulating the i/o port on battery, so the phone thinks it is a different specimen or something. Then I tried it myself.
While the phone is back to reporting "sane" battery levels, the battery took unexpectedly short time to discharge (a few hours to go from 100% to 12%). At the moment, phone has been charging for about 12 hours and got only up to 64%. I would put my bet that is is either because of the "forced reset" or the battery is no good anymore (it had spent some time in a cheap external charger. Out of juice while trying to bootstrap a new ROM, oops). Only time will tell, I guess.

Axon 7 2017G - bad battery indications.

Hello, I worked on Nougat B09 nad now B10 as Slim 4 and Slim 5 ROMs version from this forum. My problem appeared suddenly with the following sympthoms:
1. Battery lasts on 100% during normal usage discharging mode, doeas not show proportional battery usage and drop,
2. Battery can drop suddnely (or very fast) to 50 % then switch off,
3. Battery shows inconistent indications when charging in "phone off" state (eg 1 %) or when charging in "phone working state" (eg 17%) or vice versa,
4. Due to verys fast drop of indication, there is never "the 15% level" detected and the phones does not enter "Ultra power saving mode" what worked pefrectly before.
5. When battery is 1% and the phone is switch off, it needs relatively long (eg. 20 min) time to be able to boot and work again, if not - it boots, shows there is still 1% battery and switches off (in fact battery maybe already is charged partially and could work, but there is wrong 1% indications and system decides to swoitch off)
6. Soemtimes phone charges very long and still shows eg 30%, but when switched on, the battery indicator schows that is charging and battery level grows very fast, eg 1% per second or two, as it would like to achieve proper indication as fast as possible.
Overall I think battery performace is not so good, the only problem seems to be that system is given wrog batterly level indications.
9
Can it be hardware problem? I installed Slim 4, Then Slim 5 with and without Magisk? Is there any software partition that can be corrupted and causes bad battery indications . Should I try to lock bootloader and come back to full stock ROM? (I only do not know which boostack to use, the rest I can handle).
I am using brand new stock charger and cable in very good condition (from this model, out of the box yesterday) , other good cable and fast charger from other phone (used so far and worked very well) as well as power bank with QC 3.0 so there is not a problem of cable or charger.
regards Olek

Filozof71 said:
Hello, I worked on Nougat B09 nad now B10 as Slim 4 and Slim 5 ROMs version from this forum. My problem appeared suddenly with the following sympthoms:
1. Battery lasts on 100% during normal usage discharging mode, doeas not show proportional battery usage and drop,
2. Battery can drop suddnely (or very fast) to 50 % then switch off,
3. Battery shows inconistent indications when charging in "phone off" state (eg 1 %) or when charging in "phone working state" (eg 17%) or vice versa,
4. Due to verys fast drop of indication, there is never "the 15% level" detected and the phones does not enter "Ultra power saving mode" what worked pefrectly before.
5. When battery is 1% and the phone is switch off, it needs relatively long (eg. 20 min) time to be able to boot and work again, if not - it boots, shows there is still 1% battery and switches off (in fact battery maybe already is charged partially and could work, but there is wrong 1% indications and system decides to swoitch off)
6. Soemtimes phone charges very long and still shows eg 30%, but when switched on, the battery indicator schows that is charging and battery level grows very fast, eg 1% per second or two, as it would like to achieve proper indication as fast as possible.
Overall I think battery performace is not so good, the only problem seems to be that system is given wrog batterly level indications.
9
Can it be hardware problem? I installed Slim 4, Then Slim 5 with and without Magisk? Is there any software partition that can be corrupted and causes bad battery indications . Should I try to lock bootloader and come back to full stock ROM? (I only do not know which boostack to use, the rest I can handle).
I am using brand new stock charger and cable in very good condition (from this model, out of the box yesterday) , other good cable and fast charger from other phone (used so far and worked very well) as well as power bank with QC 3.0 so there is not a problem of cable or charger.
regards Olek
Click to expand...
Click to collapse
-Never lock the bootloader unless you're on stock ROM with stock recovery and unrooted
now that we got that out of the way, you should:
-install a battery calibrator (the one by nema is pretty good). this will delete the calibration files.
this will cover the software side
-install accubattery and charge from 0 to 100 some times. This will tell you how much capacity the battery has
this will tell you if it's a hardware problem

Choose an username... said:
-Never lock the bootloader unless you're on stock ROM with stock recovery and unrooted
this will tell you if it's a hardware problem
Click to expand...
Click to collapse
Thank for Your reply.
I planned to do it as follows
1. Make a backup what I have with TWRP.
2. Perorm full wipe in twrp
3. Flash stock bootstrap and modem with TWRP (I do not know what is boostrap since I came here from LeEco)
4. Boot in fastboot and flash stock recovery
5. With stock recovery install stock ROM Nougat B09 (B10 seems a little bit worse)
This will guarantee I'm running stock ROM. Locking bootloader is not needed, only if I would like to return it to Gearbest for warranty.

Choose an username... said:
now that we got that out of the way, you should:
-install a battery calibrator (the one by nema is pretty good). this will delete the calibration files.
this will cover the software side
-install accubattery and charge from 0 to 100 some times. This will tell you how much capacity the battery has
this will tell you if it's a hardware problem
Click to expand...
Click to collapse
Ok I will try. Did you mean AccuBaterry app from Play Store? Should I use paid version? Did you mean charging from 0 to 100 several times in turn or just do it from time to time? How to deduce about bettery? As I mentioned the time it works on one charge seems to be good, only indicator is showing bad values causing the system is making wrong decisions. The AccuBatery will probably take the battery level valu from the same source as system does...
Sory for double post. I planned to edit it and then remove the last and to merge the two.

Filozof71 said:
Ok I will try. Did you mean AccuBaterry app from Play Store? Should I use paid version? Did you mean charging from 0 to 100 several times in turn or just do it from time to time? How to deduce about bettery? As I mentioned the time it works on one charge seems to be good, only indicator is showing bad values causing the system is making wrong decisions. The AccuBatery will probably take the battery level valu from the same source as system does...
Sory for double post. I planned to edit it and then remove the last and to merge the two.
Click to expand...
Click to collapse
First of all, there's a much easier way to return to stock :laugh: either download the stock ROM from the Download Center (the twrp flashable ROM, e.g. B10 bootstack and stocksystem) and flash them, or use EDL Tool by djkuz and install a stock file.
If you won't relock the bootloader then there's no need to install the stock recovery! EDL Tool will install the stock recovery though. or you can download the zip from the download center and flash it
the free version of Accubattery is enough. And no it doesn't take the values from the system lol... it measures current on charge and time, and calculates capacity with it.
I mean charge from 0 to 100 several times, i.e. charge to 100, use the phone until the battery dies, charge again. After 3 times the result will be pretty accurate

Choose an username... said:
the free version of Accubattery is enough. And no it doesn't take the values from the system lol... it measures current on charge and time, and calculates capacity with it.
I mean charge from 0 to 100 several times, i.e. charge to 100, use the phone until the battery dies, charge again. After 3 times the result will be pretty accurate
Click to expand...
Click to collapse
Well, I am not sure thi will help me. As I already mentioned the problem is bad indication, not the battery life itself. Eg ot shows battery 100% but still charging, so if I think my battery is full and dosconnect the charger it can discharge fast.
If I think about some hardware repair is it battery that shows wrong values or charging module or either component? Has battery inside any chip controlling it? When I can read about it?

Filozof71 said:
Well, I am not sure thi will help me. As I already mentioned the problem is bad indication, not the battery life itself. Eg ot shows battery 100% but still charging, so if I think my battery is full and dosconnect the charger it can discharge fast.
If I think about some hardware repair is it battery that shows wrong values or charging module or either component? Has battery inside any chip controlling it? When I can read about it?
Click to expand...
Click to collapse
Well I also don't believe it's that, but i just wanted to get it out of the way, who knows. Did you try the battery calibrator? It helped me once with 30% shutdowns

Strange battery behaviour - percentage not correct - random shutdowns

Hi,
i have experienced a strange battery behaviour after i swapped a battery from another d802 model (better battery, not so used as mine)
it was working fine for some short period then the nightmare started to happen...
device shutting down on i.e. 70% battery, shutting down on its own - showing much less battery - i.e. 40%, shutting down on its own again - sometimes doing this several times - until it reaches some 5-6% and stays there for some time until it finally drains out to 1-2% (or i guess it does)...
i've tried several roms - even going totally back to stock lollipop (via flash tool) - nothing changed...
the device only stays up if it's connected to the charger...
i never had an issue like this on any android devices, even with much older batteries (i.e my good old LG P990-Optimus 2x still works without a problem)
to make things more strange - this thing started to happen on the donor device as well (which is now using my old battery - which was doing fine, pushing some 3hrs screen on time on average but without any issues close to this)
i've tried to drain the batteries down and recharging it up to 100% with the devices off - leaving them on charger for some extra time (several hours more) - but this didn't do much...
now i'm afraid what would happen if i buy a new battery (i.e. Polarcell one) - would that solve my issue or not...
i'd be sad if i had to throw my old companion in trash, would love to keep it at least as a backup device and getting the new daily driver...
i don't believe in battery calibration apps at all so please skip suggesting those but any other suggestion/help/idea is more than welcome...
thanks in advance, and sorry for the long post...
cheers all

in addition - device works perfectly fine when it's connected to a charger...

another update:
i have pulled out batteries from devices (both d802 models that i have)
connected them carefully to an external battery charger (Xtar VC4 with battery charging current and voltage reading screen) using thin +/- cables (did that several times already to revive Samsung tablet battery with success but this time i only wanted to know does my device show real voltage/capacity)
both batteries show full capacity and no error... but they just don't work as they should in the device itself... like something is messing up their reading on the motherboard itself...
can something be shorted to reset this behaviour?
note - device works perfectly when it's connected to a charger, even when connected to a computer...
btw AccuBattery shows 100% charge at the moment with 4.348mV voltage (which i think is ok for a full battery)
one thing i've noticed yesterday - AccuCharger showing the estimate of some 500mAh capacity (out of 3000mAh) - that was weird to me (but i don't know how AccuBattery calculates that estimate)

newest update:
- bought a new Polarcell battery > all problems are gone