Newly flashed rom, charged it full, and recalibrated battery.
only 6% battery drain while sleeping
But when im using it, it could use 1% battery after 5 minutes, but then suddely the next minute it has dropped 2-3%.
Sometimes it holds the battery, but then suddely it drops like crazy.
I havent let the battery die after recalibration, but i thought that after resetting the battery stats it should be more linear battery drain when im doing the exact same operation the whole time, so i guess it would drain the same amount of battery, not being that jumpy
b1rken said:
Newly flashed rom, charged it full, and recalibrated battery.
only 6% battery drain while sleeping
But when im using it, it could use 1% battery after 5 minutes, but then suddely the next minute it has dropped 2-3%.
Sometimes it holds the battery, but then suddely it drops like crazy.
I havent let the battery die after recalibration, but i thought that after resetting the battery stats it should be more linear battery drain when im doing the exact same operation the whole time, so i guess it would drain the same amount of battery, not being that jumpy
Click to expand...
Click to collapse
using Current widget or battery monitor to observe how many mA it consume every one or five minutes? average 2-10mA is normal
my battery used to charge good. yes i have done the battery calibration. but when i kill my phone to 1% battery and then plug it in and get it charge straight through i notice it reaches 4200mAh at about 80% charge which is actually 100% full. anyway i can fix this? im on Start Burst 1.9.5 with 1.0.0.8 LostKernel
EDIT- I I turned my phone off and used the charger that came with the phone and did a full charge with the phone off and when I turned phone on it was at 4182mAh ( which is close enough to full ) and showing 99%. I hit the callinrate button right away. Hopefully after this drain the next charging cycle will associate 4200Mah as 100% charged. Uh damn confusing techknology
I've seen a few post regarding the 4.3V at 100% thing, but they're too old and haven't really given me much information.
My main issue is that I'm experiencing unusually rapid battery drops after my phone reaches 12% charge, it'd drop to 0% in just a few seconds. I downloaded a few battery calibration apps thinking that it might be a calibration issue. In that process, I noticed that the voltage read by these apps (and even in the *#*#4636#*#* menu) when fully charge is 4,38 volts. It was my understanding that Li-Po batteries should be fully charged at 4.2 volts and that charging past that point is harmful for the battery.
I also noticed that if at this point (charged at 4.38 volts - 100%) I unplugg the charger, the battery indicator would show 100% for a while, until the voltage drops below 4.2V, at that point the porcentage would change to 99%, so it seems that the device is set recognize 4,2V as fully charge, but it continues charging after that point. Also, the green light turns on at 90%, is this normal?
I tried calibrating using this app but with no results. I'm trying the manual calibration now. What is going on here? Could this be a clibration issue or do I have a faulty battery?
I think it is not normal. My P6 drops even a little bit slower from 10%. current my P6 is on 6% and 3,627V. (Edit: Turn off: 3,55V / After charge 100%: 4,32V)
Next time i will charge, then i post the Voltage at 100% for you.
To calibrate the accu you don't need any app. Use P6 until it is automatic power off. Now turn it on so often until it will not start anymore, and only show a red accu on screen. Now charge to 100%, turn on, unplug charger. Now your accu is calibrated.
heross said:
I think it is not normal. My P6 drops even a little bit slower from 10%. current my P6 is on 6% and 3,627V. (Edit: Turn off: 3,55V / After charge 100%: 4,32V)
Next time i will charge, then i post the Voltage at 100% for you.
To calibrate the accu you don't need any app. Use P6 until it is automatic power off. Now turn it on so often until it will not start anymore, and only show a red accu on screen. Now charge to 100%, turn on, unplug charger. Now your accu is calibrated.
Click to expand...
Click to collapse
Thanks, heross. So apparently the >4.2V @ 100% is not so unusual. Does your phone remain at 100% for a relatively long time and drops to 99 after the voltage is below 4.2V? Mine does that, and it also turns the led green when it reaches 90%.
I'm sure the dropping from 12% o 0% in seconds cannot be normal, but I'm wondering if the above is a symptom that something is wrong or
if it's normal.
EDIT: Ok, the phone just turned off by itself, the quick drop hapenned as usual (12% to 0% in less than a minute) and the voltage fluctuated between 3,1 and 3,3 volts in the process, maybe even less than 3.1 V, but I'm not sure. I took a series of screen shots 2 seconds apart, I'll post them when I turn the phone on again, I'll let it charge as you suggested.
Yes LED green at 90% is normal. My P6 drops to 99% after 1-2minutes screen on or after a boot without charger.
12% to 0% in seconds is definitely not normal. Normal it goes down very slowly to 3% then it comes a Info and after 30sec it power off.
Hi
heross said:
Yes LED green at 90% is normal. My P6 drops to 99% after 1-2minutes screen on or after a boot without charger.
12% to 0% in seconds is definitely not normal. Normal it goes down very slowly to 3% then it comes a Info and after 30sec it power off.
Click to expand...
Click to collapse
Finished charging.
I've turned the phone on and it has been sitting at 100% for about 25 minutes at 4,348V with the screen on. (I even played a video with full brightess). After that it droped to 99% and 4,079V[/B]. That can't be normal.
I saw that the P6 battery is rated 4,35 volts, so i'm not too worried anymore abut that voltage and everyone else seems to have the same values, but this quick drop with 12% and the fact that it stays for so long at 100% does worries me.
The screenshots were taken 2 or 3 seconds apart. It doesn't give me a low battery warning at 15% like most phones, but at 8%
I'm still having this extremely annoying problem. The goddamn battery goes from 12-13% to 0% in a blink of an eye. I just plugged the charger at 8% and it show 0% right after and started charging from there. Voltages are strange too, it shows ~3,6 volts when it started dropping quickly. It has charged ~20% in less than ten minutes. Look at this behavior: sudden voltage drops, never went below 3,3V and dies at 3,6V (almost nominal voltage)
I've tried calibrating several with several methods a few times, I'd prefer to stop doing that since I know it stresses the battery.
Has anyone had this issue? Can someone please shed some light on WTH is wrong with this troublesome phone?
Saw this post now. I have the same problem but it is from 9% to 0% . I don't think it is the battery, i think it is how android reads your battery info. I managed to calibrate mine by charging it when off from 0% to 100%-didn't last for long, the problem appeared once again.
It stays to much at 100% after charging, so we have the same battery life. Might be the kernel, don't know. I home when emui 3.0 is relased comes with a new kernel as well.
mcgyani said:
Saw this post now. I have the same problem but it is from 9% to 0% . I don't think it is the battery, i think it is how android reads your battery info. I managed to calibrate mine by charging it when off from 0% to 100%-didn't last for long, the problem appeared once again.
It stays to much at 100% after charging, so we have the same battery life. Might be the kernel, don't know. I home when emui 3.0 is relased comes with a new kernel as well.
Click to expand...
Click to collapse
I also managed to fix it once, I don't remember exactly what I did (I've tried so many things) but it didn't last long either, it discharged normally one time, but the next time dropped from 12% to 0% again in seconds. When will EMUI 3.0 be released?
They said emui 3.0 will be released in the middle of november for p6 but they also said that it will be available for p7 since october -they kept their word and it is available but only for the chinese versions of p7. So i would expect emui 3.0 for p6 in december for the international version.
mcgyani said:
They said emui 3.0 will be released in the middle of november for p6 but they also said that it will be available for p7 since october -they kept their word and it is available but only for the chinese versions of p7. So i would expect emui 3.0 for p6 in december for the international version.
Click to expand...
Click to collapse
Ok, I think I managed to calibrate it, I'm not sure yet, I will update once the battery is drained so I can see how it behaves at low charge, but there are indications that it's working.
If you're experiencing the same problem as me, then you've probably noticed that after your phone drops quickly from 9% (in your case) to 0% and you plug the charger, the battery will charge up to 9% also very quickly. If this happens, then Android is not reading the battery info right and you'll get a 100% reading before it's actually fully charged, and will keep on charging past that point (which I believe is why it stays at 100% for such a long time). It'll obviously drain from 9% to 0% again once it's discharged - because it's not really at 9%, it's much lower.
So, if we can manage to get Android to display normal charging speeds at low charge, then the battery should be calibrated. This is what I've managed to do.
Here's how:
1. Get a Battery Monitoring App (I use Battery Monitor Widget) and set the update intervals to 1 minute
2. Let your battery drain and your phone turn irself off until you can't turn it on
3. Plug the charger and turn the phone on. Watch how the charge increases in this process, it'll most likely charge too quickly (See graph screenshot - blue arrow: a steep slope indicates quick, abnormal charging speed readings)
4. Wait 5 minutes or until it reaches 10-12%
5. Unplug the charger and let the battery drain again. Watch how it discharges, if it charged too quickly in step 3, it'll most likely discharge quickly too here (You can see in the graph screenshot that the discharging slope in this process is also very steep)
6. When it says it's going to turn itself off in 30 seconds, plug in the charger (don't let it turn off).
7. If the 'turning off' message appeared, say, at 2%, your phone will probably display 0% after you plug the charger (i know this makes no sense, but it happens like that)
8. Let it charge and watch how it's charging.
After doing this my battery charged at a normal rate (Graph screenshot - red arrow) and it behaved normally approaching full charge (current started decreasing approaching 100% - green arrow). It didn't stay for ages in 100% after unplugging the charger either, just 1 hour in deep sleep (2nd and 3rd screenshots), which I think is fine because I used to unplugg the charger at night and wake up to a 100% battery, so it seems Android is reading battery info correctly now.
I hope this works for you too, mate (And that it will last more than one charge cycle).
I'll update tonight with low charge behaviour, but I'm pretty sure it'll discharge normally.
EDIT: It didn't actually eliminate the problem, but it got a little better, it now drops from 7% to 4% (instead of 12-13%) and stays at 4 for a while.
its not that old, maybe 6 months old, about the last 3 times that my battery has nearly fully discharged, its not got all the way to 0% and has been going off at 3% but then when i plug the charger in and turn the tablet back on the battery shows as 0%
i also noticed the other day it was at about 4% battery and i wa son a pool game, the screen started flickering on and off, and then it turned off, not sure if that's just because it was on the very end of the battery, but was still around 4% anyway so should have been ok till 0%?
any ideas if i have something wrong or is it normal?
James
The tablet will shut off once the battery is depleted. Anywhere under 10% is normal. Letting your device run that low is hard on the battery and will reduce its lifespan.
Read this: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
The battery meter is not even remotely as accurate as you expect it to be. Its just an estimate of battery voltage versus how you are using the device. Don't expect it to be accurate to within a few percent, or even 5-10%.
Heck, I've had some devices show a drop of 20-30% and shutoff. Probably just some metering error, and it didn't happen often. But that tells you how inaccurate the meter can be.
As another mentioned, deep cycles are not good for the long term life of Li ion batteries. Charge fully and frequently.
Hi, I picked up my phone from repair shop a week ago and since then when my battery goes below 55% i get message that battery is 0% and phone is shutting down, and then I put it on charger and sometimes it starts recharging from 1% but sometimes from 55% and if i charge it to 60% it works normally, but when i charge it to 100% it turns off on 55%, can someone help me please is it problem in software or maybe it is problem in battery?
Kikid97 said:
Hi, I picked up my phone from repair shop a week ago and since then when my battery goes below 55% i get message that battery is 0% and phone is shutting down, and then I put it on charger and sometimes it starts recharging from 1% but sometimes from 55% and if i charge it to 60% it works normally, but when i charge it to 100% it turns off on 55%, can someone help me please is it problem in software or maybe it is problem in battery?
Click to expand...
Click to collapse
It sounds very much like this:
http://forum.xda-developers.com/son...ttery-reporting-phone-dying-suddenly-t3095120
I replaced the battery and it's been working well for a few months now.
Battery drop from 50 % to 0 %
I had the same issue.
After force shut down (power + vol-up for 10 sec), the battery went back to normal.
http://talk.sonymobile.com/t5/FAQ/Facing-problems-with-abnormal-battery-and-shutdown/td-p/320375
EDIT :
That was a short lifesaver, battery is "fubar".
Guys , maybe there's something wrong with the battery charging in Amami . I have two Z1C, one of which normally charge up to 100 %. But the other charges the battery to 100% only in Stock 4.4.4 ... In all versions of Lollipop (stock or not) battery charges to 82% ... Calibration of the battery does not help. I replaced the battery - no change. I tried another powerful charger by Samsung - without effect. Anybody have an idea what's going on ?