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[Q] Phone off battery indicator never reaches 100%?

I decided to try resetting the battery stats, charged the phone to 100%, then turned off the phone and plugged in the charger and now the green battery icon looks like it is about 90% full, but never goes to 100% (I've left it plugged in for 3 hours since). Any ideas?
Update: Full discharge and recharge seems to have done the trick!

Let the battery drain to zero. Plug in for a min then unplug to see where its at. If its at 1% charge it back to full and reset stats again...if it says something weird like 12% or more or less let it drain and die again until its at 1% then recharge and reset stats. Then let die completely before recharging
Sent from my SAMSUNG-SGH-I897 using XDA App

Smallsmx3 said:
Let the battery drain to zero. Plug in for a min then unplug to see where its at. If its at 1% charge it back to full and reset stats again...if it says something weird like 12% or more or less let it drain and die again until its at 1% then recharge and reset stats. Then let die completely before recharging
Sent from my SAMSUNG-SGH-I897 using XDA App
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Will try and and report back - thanks for the suggestion!

I've found that my phone won't charge all the way unless I'm using the wall charger or car charger that I got with the phone I had tried using a charger from one of my old phone's and it actually made the phone go into sync mode and still didn't charge it all the way sometimes even when it's plugged into the computer it wont charge all the way
Sent from my SAMSUNG-SGH-I897 using XDA App

govgeek said:
Will try and and report back - thanks for the suggestion!
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Also try using the phone heavily and discharge it

Calibrating battery.

So i charged to 100% and callibrated and left the phone on the side for a while as ive heard battery callibration works better when battery is naturally drained. However, its been a week and its still at 100% -_____-. i dont plan on waiting a month or so just to make sure its perfectly callibrated. Is there a better way to do this? . Thanks guysss
Sent from my SGH-T959V using XDA Premium App

Light-라이트 said:
So i charged to 100% and callibrated and left the phone on the side for a while as ive heard battery callibration works better when battery is naturally drained. However, its been a week and its still at 100% -_____-. i dont plan on waiting a month or so just to make sure its perfectly callibrated. Is there a better way to do this? . Thanks guysss
Sent from my SGH-T959V using XDA Premium App
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Naturally drained? Regular use is needed to drain the battery. An unused battery (I have a couple) will take months to drain. Just use the phone as you do in your every day usage. Let it get down to about 5 to 10% then fully charge and calibrate.

you cant calibrate a lithium ion battery. in fact draining them is bad for the battery. however if youre having problems with the phone not reading the battery percentage correctly you need to wipe the batterystats.bin using either clockworkrecovery or just download the battery calibration app from the market.

regP said:
you cant calibrate a lithium ion battery. in fact draining them is bad for the battery. however if youre having problems with the phone not reading the battery percentage correctly you need to wipe the batterystats.bin using either clockworkrecovery or just download the battery calibration app from the market.
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Really? Cycling the battery a few times for better performance is a myth?

xAshxMoneyx said:
Really? Cycling the battery a few times for better performance is a myth?
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yes for lithium battery it is. the older ni-cd batteries required this.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
infact..this result shows that you should charge often. 10-15% discharge..and charge cycles provided the longest battery life.
this article is very very good!

That's good information. While I didn't know all that I did find the whole calibration idea a waste of effort. I've tried calibrating the battery on a couple phones and my battery life has never increased. The most that ever happens is I'll find myself away from home with no charger and have to quit playing with phone so I have enough juice left in case of an emergency.
Sent from my LG-P999 using xda premium

regP said:
you cant calibrate a lithium ion battery. in fact draining them is bad for the battery. however if youre having problems with the phone not reading the battery percentage correctly you need to wipe the batterystats.bin using either clockworkrecovery or just download the battery calibration app from the market.
Click to expand...
Click to collapse
No, Lithium-ion batteries do not have a memory effect.
Technically, you are not calibrating the battery, you are calibrating your phone's battery gauge. The easiest way to do that is with the Battery Calibration app.
1. Open the Battery Calibration app screen. With the phone on, charge to 100%, then let the phone continue charging for another 15 min.
2. Press the "Calibrate Battery" button on the app (deletes batterystats.bin), Close Battery Calibration app then TURN THE PHONE OFF IMMEDIATELY!
3. Disconnect AC charger
4. Remove battery
5. Wait 30 seconds, then re-insert battery
6. Charge phone with phone off for half an hour
This tops off the charge on the battery.
7. Disconnect charger and turn phone on
As the phone turns on it will create a new batterystats.bin and record the high battery voltage as 100% battery.
8. Use the phone normally and run it down to 0% when the phone shuts off.
The phone now knows the curve of this battery as it relates to your phone's ROM
9. Charge the phone for ten minutes, then turn the phone on and let it continue charging to 100%
This lets batterystats.bin know your phone's charging curve
10. At 100%, remove charger
Now use the phone normally. You will be happy to get an extra few hours use of your phone.
If you really want to get the most out of your battery, get the Battery Monitor Widget Pro app. It keeps a close watch on your battery and also allows you to change batterystats.bin files for different batteries.
And always remember to Give Thanks if you find this helpful!

EEngineer said:
No, Lithium-ion batteries do not have a memory effect.
Technically, you are not calibrating the battery, you are calibrating your phone's battery gauge. The easiest way to do that is with the Battery Calibration app.
1. Open the Battery Calibration app screen. With the phone on, charge to 100%, then let the phone continue charging for another 15 min.
2. Press the "Calibrate Battery" button on the app (deletes batterystats.bin), Close Battery Calibration app then TURN THE PHONE OFF IMMEDIATELY!
3. Disconnect AC charger
4. Remove battery
5. Wait 30 seconds, then re-insert battery
6. Charge phone with phone off for half an hour
This tops off the charge on the battery.
7. Disconnect charger and turn phone on
As the phone turns on it will create a new batterystats.bin and record the high battery voltage as 100% battery.
8. Use the phone normally and run it down to 0% when the phone shuts off.
The phone now knows the curve of this battery as it relates to your phone's ROM
9. Charge the phone for ten minutes, then turn the phone on and let it continue charging to 100%
This lets batterystats.bin know your phone's charging curve
10. At 100%, remove charger
Now use the phone normally. You will be happy to get an extra few hours use of your phone.
If you really want to get the most out of your battery, get the Pro app. It keeps a close watch on your battery and also allows you to change batterystats.bin files for different batteries.
And always remember to Give Thanks if you find this helpful!
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out of all battery calliberation posts ive seen till now but this one makes complete sense. this even gave me an idea how this "caliberation " works.
again, thanks

dragonflame8712 said:
out of all battery calliberation posts ive seen till now but this one makes complete sense. this even gave me an idea how this "caliberation " works.
again, thanks
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agreed :good:

[Q] how do you calibrate battery?

I'm reading some guides and posts about battery calibration...
I'm trying to do it with battery calibration apk, but I can't understand when battery is really full even if I use current widget (it stucks at 10mv, it does not come down to 0).
how do you calibrate?

Do wipe status as long as u riched this value as a maximum. .. restart. .. let it with out charging till it gets to 1% then charge it again till 100% do that a couple of times ur battery should be calibrated for good; )
Sent from my HTC Sensation XE with Beats Audio Z715e using xda premium

To know when its fully charged you need to be watching ma not mv. As ma is the flow of electricity that your battery is currently receiving, as long as your phone is on it will not hit 0 as your phone will still be consuming battery so it will always sit between 10 and 20ma when fully charged. As long as your happy its sat around that mark for a few minutes then its charged. But best way to calibrate in my opinion, is to just discharge to 5% and charge overnight. Wiping battery stats does nothing as your phone creates a new battery stats file on its own after every full charge and battery stats.bin only contains information of what's been using your battery like in the settings menu. This has been confirmed on xda portal by a Google software engineer.
Your phone is clever enough to figure out what charge your battery has by measuring amps and volts once its been discharged and charged a couple times as by then it will have a established the minimum and maximum mv your battery can hold and battery stats file does not hold this information.
Sent from my HTC Sensation using xda premium

[HowTo] Calibrate your Li-ion Battery Perfectly

Many of My Friends are facing Problem With Battery as Rom shows wrong information about remaining Battery %... As a result your phone goes off and when you start your Phone again it starts to show different % battery that mean that your battery is not Calibrate.. I am making this guide so that every one on this world may enjoy their phone for long time...
Warning Do at your own RISK...! Dont do it again and again
Steps you need to Do ​-1 First thing you need to do is let your battery goes to 0%.. then again start your phone(Don't plug in charger) and repeat 1st step until your phone denies to turn on back..
-2 Then Charge your phone in Switched off mode to 100%
-3 Unplug your charger
-4 On phone
-5 Your phone is going to show % of battery lesser than 100%
-6 Charge your phone again in on mode to 100%
-7 Unplug your charger
-8 Restart your phone and repeat Steps from 4 to 8 again and again until on every restart u battery % shows about 97%to100%
-9Next step is to calibrate your battery Download free app from plat Store that is Battery Calibration
-10 Calibrate your Battery with the help of that app and make sure that your Battery % is 100
-11 After Calibration Use ur Battery Upto 0%
-12 Then Charge it again and Your battery will be Calibrated...
Enjoy..
Hit Thanks ​

shreyans4020 said:
Many of My Friends are facing Problem With Battery as Rom shows wrong information about remaining Battery %... As a result your phone goes off and when you start your Phone again it starts to show different % battery that mean that your battery is not Calibrate.. I am making this guide so that every one on this world may enjoy their phone for long time...
Enjoy..
Hit Thanks ​
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DON'T ever do this! Discharging a Li-ion battery completely WILL decrease your battery life.
Next, the battery calibration app is nothing more but a hoax. It only deletes a file containing the battery stats which is ONLY used in the battery statistics screen in settings.
So please, DON'T!

It's true you get the same result from the battery calibrate app by wiping battery stats in recovery. Draining your battery does decrease battery life of li-ion batteries, same goes for your laptop. The theory to cycle your battery is a myth and actually wrecks your battery.
Sent from my GT-i9100 using Tapatalk 2

bugadani said:
DON'T ever do this! Discharging a Li-ion battery completely WILL decrease your battery life.
Next, the battery calibration app is nothing more but a hoax. It only deletes a file containing the battery stats which is ONLY used in the battery statistics screen in settings.
So please, DON'T!
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Click to collapse
The 0% reported by the operating system is actually a bit higher than the voltage at which li-ion batteries will become damaged. Any modern phone should not allow you to discharge the battery to the point where it could cause damage.
Also there was an employee from Google IIRC that said wiping battery stats was useless because its only a file that keeps track of what apps used the battery and it wiped automatically when charged to 100%.

bugadani said:
DON'T ever do this! Discharging a Li-ion battery completely WILL decrease your battery life.
Next, the battery calibration app is nothing more but a hoax. It only deletes a file containing the battery stats which is ONLY used in the battery statistics screen in settings.
So please, DON'T!
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Click to collapse
Well when there is fall in battery from 100% to zero in 10 min then u have to calibrate
I am not saying to calibtate it daily... as i said you have to go to zero once to complete one cycle..

spunker88 said:
The 0% reported by the operating system is actually a bit higher than the voltage at which li-ion batteries will become damaged. Any modern phone should not allow you to discharge the battery to the point where it could cause damage.
Also there was an employee from Google IIRC that said wiping battery stats was useless because its only a file that keeps track of what apps used the battery and it wiped automatically when charged to 100%.
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True.. i m getting what u want to say about labor force..

shreyans4020 said:
Well when there is fall in battery from 100% to zero in 10 min then u have to calibrate
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I admit, when that happens, the battery circuit is probably in a dumb state and it _may_ be useful then. But doing this regularly is incredibly dangerous for the battery. Yes, some phones bias the battery reading but the post suggests to actually force it empty while turning it back on and on and on and that really kills it.
Still, using the app is just pure nonsense.

bugadani said:
I admit, when that happens, the battery circuit is probably in a dumb state and it _may_ be useful then. But doing this regularly is incredibly dangerous for the battery. Yes, some phones bias the battery reading but the post suggests to actually force it empty while turning it back on and on and on and that really kills it.
Still, using the app is just pure nonsense.
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No post suggest that drain battery once to zero then charge it again and again upto actual 100%
Sent from my Karbonn A5 using xda app-developers app

shreyans4020 said:
No post suggest that drain battery once to zero then charge it again and again upto actual 100%
Sent from my Karbonn A5 using xda app-developers app
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How about the 1st point of the first post? "Drain it to 0 then turn it on and on again until it doesnt turn on anymore"?
You could brick an hp touchpad by doing this.

bugadani said:
How about the 1st point of the first post? "Drain it to 0 then turn it on and on again until it doesnt turn on anymore"?
You could brick an hp touchpad by doing this.
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Because 0% shown by the phone is.not actually 0% to gain that actual 0% we have to do that
Sent from my Karbonn A5 using xda app-developers app

You do realize why they make the reported 0% above the actual 0%. If you drain a lithium ion battery to actual 0% you'll permanently damage it. Also calibration is only useful if you want the OS to read the battery percentage more correctly. Lithium ion batteries themselves work perfectly fine with partial charge cycles.

spunker88 said:
You do realize why they make the reported 0% above the actual 0%. If you drain a lithium ion battery to actual 0% you'll permanently damage it. Also calibration is only useful if you want the OS to read the battery percentage more correctly. Lithium ion batteries themselves work perfectly fine with partial charge cycles.
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Actually your phone will not turn on before damage point so don't worry about that ...
Sent from my Karbonn A5 using xda app-developers app

shreyans4020 said:
Actually your phone will not turn on before damage point so don't worry about that ...
Sent from my Karbonn A5 using xda app-developers app
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That doesn't make any sense - you're stating in that post that turning on the phone damages the battery.
I will state this again: if you force your phone on and on again until it doesn't react, you may and on the long run probably will damage your battery. If your battery is not removable, this can also easily brick your device as seen with HP Touchpads.
If you feel that you must do something, simply drain the battery _once_ then charge it. This is the only thing that a sane electric engineer will ever advise.

Well that worked on my phone... i said that do at your own risk.... actually i am saying the same thing that drain your battery.. but if battery is not calibrate sometimes phone goes off even on 36% and if u charge at that point to hundread then that method will not work...
Sent from my Karbonn A5 using xda premium

Thank us so much working perfectly for me

iiTian said:
Thank us so much working perfectly for me
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Press the thanks button

:good:
DraXonic said:
Many of My Friends are facing Problem With Battery as Rom shows wrong information about remaining Battery %... As a result your phone goes off and when you start your Phone again it starts to show different % battery that mean that your battery is not Calibrate.. I am making this guide so that every one on this world may enjoy their phone for long time...
Warning Do at your own RISK...! Dont do it again and again
Steps you need to Do ​-1 First thing you need to do is let your battery goes to 0%.. then again start your phone(Don't plug in charger) and repeat 1st step until your phone denies to turn on back..
-2 Then Charge your phone in Switched off mode to 100%
-3 Unplug your charger
-4 On phone
-5 Your phone is going to show % of battery lesser than 100%
-6 Charge your phone again in on mode to 100%
-7 Unplug your charger
-8 Restart your phone and repeat Steps from 4 to 8 again and again until on every restart u battery % shows about 97%to100%
-9Next step is to calibrate your battery Download free app from plat Store that is Battery Calibration
-10 Calibrate your Battery with the help of that app and make sure that your Battery % is 100
-11 After Calibration Use ur Battery Upto 0%
-12 Then Charge it again and Your battery will be Calibrated...
Enjoy..
Hit Thanks ​
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Click to collapse

This is why you shouldn't/ need not calibrate your batteries.. It'll do you more harm than good.
http://batteryuniversity.com/learn/article/battery_calibration

are we in need to wipe battery status for once in the recovery

What about for me, me tab has been saying 1% the past 3 hours and I've been using it and trying to kill it so hard but whatever I do it won't die. I want to "truly" get it to 1% or even 0% so I can then charge it back up to 100% in hopes of calibrating the battery to show what my actual % is. Any help will be appreciated greatly.

Battery Problem..

Hey I am facing severe battery drainage problem...
The phone is been charged very very slowly when its on and drains very very quickly...
it charges a little fast when switched off but its still slow as compared to normal android phone...
help...
I charged around 50% in off phone and after in on the phone and the battery almost 0% in just 15 min...

parthbhatia98 said:
Hey I am facing severe battery drainage problem...
The phone is been charged very very slowly when its on and drains very very quickly...
it charges a little fast when switched off but its still slow as compared to normal android phone...
help...
I charged around 50% in off phone and after in on the phone and the battery almost 0% in just 15 min...
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Click to collapse
First check your battery whether it is swollen or not..
If not try to calibrate your battery.. Remeber calibrate doesnt increase battery life it will rectify your battery stats.. I think your battery stat is showing wrong info..
Let the battery drain off completely charge until 100 dont take out while it is charging.. Calibrate and restart you phone..

shubhojit89 said:
First check your battery whether it is swollen or not..
If not try to calibrate your battery.. Remeber calibrate doesnt increase battery life it will rectify your battery stats.. I think your battery stat is showing wrong info..
Let the battery drain off completely charge until 100 dont take out while it is charging.. Calibrate and restart you phone..
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I think you are right that my battery stats are not proper... because I just restarted my phone and my. battery gone to 73% from 23%....!!
and my battery is not swollen...
But can u tell me the calibration steps?

parthbhatia98 said:
I think you are right that my battery stats are not proper... because I just restarted my phone and my. battery gone to 73% from 23%....!!
and my battery is not swollen...
But can u tell me the calibration steps?
Click to expand...
Click to collapse
Simply install battery calibration app from play store i think after search 1st app will b the one.. Install it.. Instructions are given in the app just after install open it..
The instructions are simple anyway..