Careful battery status inaccurate %

[Braxos]

Guys I noticed that when checking with *#0228# the battery status and you do a quick start the battery percentage drops radically 10-30% depends of the use of your phone. I remembered that I have read somewhere about the 5% left of the charge of the battery is left when a phone shuts down so battery doesn't get destroyed. Not sure if it is true or not.

But as I see it the percentage of battery left on notification bar isn't accurate.

Please check it on your phone and post if it happens to other phones. And if there is some more tech based guys outthere, to explain give a solution or a helpfully trick.


Sent from my GT-N7000 using Tapatalk 2

 

[Alexanderbooth]

I think even though it might not be accurate, its will always be inaccurate the same surely, so eventually you'll learn how it reacts, so it does give you an idea of what's left.

 

[Braxos]

I think even though it might not be accurate, its will always be inaccurate the same surely, so eventually you'll learn how it reacts, so it does give you an idea of what's left.

If it was just few % I would not mind on my last quick start it dropped from 46% to 18% the next one did go to 26% then 23% and back to 26%

Sent from my GT-N7000 using Tapatalk 2

 

[Alexanderbooth]

Maybe your battery stats have gone another wrong in the upgrade, I've only done on charge so far, so haven't really noticed any difference in battery life from gb so far.

 

[Braxos]

Maybe your battery stats have gone another wrong in the upgrade, I've only done on charge so far, so haven't really noticed any difference in battery life from gb so far.

Could you use the code *#0228# and post a Screenshot of the informations that will show?

Thanks

Sent from my GT-N7000 using Tapatalk 2

 

[Entropy512]

Guys I noticed that when checking with *#0228# the battery status and you do a quick start the battery percentage drops radically 10-30% depends of the use of your phone. I remembered that I have read somewhere about the 5% left of the charge of the battery is left when a phone shuts down so battery doesn't get destroyed. Not sure if it is true or not.

But as I see it the percentage of battery left on notification bar isn't accurate.

Please check it on your phone and post if it happens to other phones. And if there is some more tech based guys outthere, to explain give a solution or a helpfully trick.


Sent from my GT-N7000 using Tapatalk 2

What do you mean by "quick start"? - it's a known and fairly well documented aspect of our fuel gauge chip that heavy load immediately following a reset (such as rebooting) will cause it to report artificially low.

 

[Braxos]

What do you mean by "quick start"? - it's a known and fairly well documented aspect of our fuel gauge chip that heavy load immediately following a reset (such as rebooting) will cause it to report artificially low.

Use the dialer and give the code *#0228# it pops the battery information on the bottom is a button it says on it QUICK START on GB it would make a quick restart it think (black screen for 5-7 secs) now it only changes the block value of the battery and the charged percentage.

Sent from my GT-N7000 using Tapatalk 2

 

[Braxos]

Here is a safe each of the 4points are quick starts from *#0228# menu. On 4 you can see the big difference between the readings.

Sent from my GT-N7000 using Tapatalk 2

 

[NaveenKD]

@Entropy,

Can you throw some more light. Can we use this for battery callibration?

Sent from my GT-N7000 using xda app-developers app

 

[rraaka]

Doesnt come as a surprise, the indicator is not accurate as for other devices too.
AFAIK battery caliberation is a complicated process for which one may need kernels with special features.
its not something that can be done by an app from the market....

 

[baz77]

@Entropy,

Can you throw some more light. Can we use this for battery callibration?

Sent from my GT-N7000 using xda app-developers app

+1 or is it useless functionality?

Sent from my GT-N7000 using Tapatalk 2

 

[antique_sonic]

braxos,
did you just change ROM and/or Kernel ?
If yes, you would need to do a few cycles of charge-discharge, and clean the battery status.

I only experience like that when I just changing kernel (different kernel, not upgrade), and changing different ROM (different ROM also, not upgrade).
Otherwise, when the ROM and kernel stabilized alrd, I have never experienced such things.

 

[Entropy512]

Guys I noticed that when checking with *#0228# the battery status and you do a quick start the battery percentage drops radically 10-30% depends of the use of your phone. I remembered that I have read somewhere about the 5% left of the charge of the battery is left when a phone shuts down so battery doesn't get destroyed. Not sure if it is true or not.

But as I see it the percentage of battery left on notification bar isn't accurate.

Please check it on your phone and post if it happens to other phones. And if there is some more tech based guys outthere, to explain give a solution or a helpfully trick.


Sent from my GT-N7000 using Tapatalk 2

Read the MAX17040 datasheet. Particularly the part about the assumptions the chip makes when starting - if those assumptions don't hold true, it'll read inaccurately for a while.

We have a MAX17042 but in our phone it's used identically to the older 17040.

Nothing new, it's the same deal as the "battery estimate drops artificially on a reboot" thing.

The battery protection circuit in the pack is not based on SoC estimate, it's based purely on voltage, so will always shut the phone off before damage occurs.

 

[Entropy512]

braxos,
did you just change ROM and/or Kernel ?
If yes, you would need to do a few cycles of charge-discharge, and clean the battery status.

I only experience like that when I just changing kernel (different kernel, not upgrade), and changing different ROM (different ROM also, not upgrade).
Otherwise, when the ROM and kernel stabilized alrd, I have never experienced such things.

No, you don't need to do that. That only applies to "coulomb counter" type fuel gauges - which ours is not.

Wait 1-2 hours and do nothing but use your phone normally - that's it. Charge it if you want, discharge it, whatever...

 

[NaveenKD]

No, you don't need to do that. That only applies to "coulomb counter" type fuel gauges - which ours is not.

Wait 1-2 hours and do nothing but use your phone normally - that's it. Charge it if you want, discharge it, whatever...

Entropy,
I was on rooted stock rom and Notecore kernel (v11.5). I had a very good battery with no deep sleep issues and good 'On screen battery' time.
I flashed a new kernen (v12.0 I believe) & started experiencing battery drain issues. Still Deep sleep is very fine. But on screen battery drain is huge (>25%/hr).
Since then I have altered between Notecore and Speed mod kernels, but the issue persists. I have almost tried very method suggested in XDA to callibrate battery but no improvement seen. I am worried whether my battery is aged, but its only 9 months old.

 

[baz77]

Entropy,
I was on rooted stock rom and Notecore kernel (v11.5). I had a very good battery with no deep sleep issues and good 'On screen battery' time.
I flashed a new kernen (v12.0 I believe) & started experiencing battery drain issues. Still Deep sleep is very fine. But on screen battery drain is huge (>25%/hr).
Since then I have altered between Notecore and Speed mod kernels, but the issue persists. I have almost tried very method suggested in XDA to callibrate battery but no improvement seen. I am worried whether my battery is aged, but its only 9 months old.

nice, did you try cleaning before flashing the kernel, like jbroidscript?
Not all kernel versions are very good for battery life.
Did you also check if your battery is getting full charge? with android sensor you can see current charge left.
Screen on drain is usually around 25% unless playing games then its more. Note only is capable of 3-4 hours screen time with no games, with games its less.

just a few tips.


Sent from my GT-N7000 using Tapatalk 2

 

[NaveenKD]

nice, did you try cleaning before flashing the kernel, like jbroidscript?
Not all kernel versions are very good for battery life.
Did you also check if your battery is getting full charge? with android sensor you can see current charge left.
Screen on drain is usually around 25% unless playing games then its more. Note only is capable of 3-4 hours screen time with no games, with games its less.

just a few tips.


Sent from my GT-N7000 using Tapatalk 2

Thanks baz77.

Can you please guide me to correct Jbdroid script. The one i foound in XDA is put by JBlank and many senior members are calling it useless.
Battery charging is fine. Atleast all teh tools like Battery monitor widget, inbuilt, Badass monitor and as suggested androsensor are giving the same % readings and informs battery health to be good.

But its not a placebo effect. I can really battery draining nothing like before.

 

[darkkhan]

Hello guys

i have a question,

when i typed *#0228# on my Galaxy s3 , i can see information about my battery . I want to see whethever my battery is original or not. So that i want to look up page two . But i can not get to second page. How can i do ? please help me

 

[hihipunkt]

Hello guys

i have a question,

when i typed *#0228# on my Galaxy s3 , i can see information about my battery . I want to see whethever my battery is original or not. So that i want to look up page two . But i can not get to second page. How can i do ? please help me

I guess the only way for you to find out, is take out the battery and compare it to a real genuine samsung battery.

In software this shouldn't be possible.

Although this thread is damn old: Simply delete batterystats.bin OR turn off the phone and let it charge to 100% when off. This also happens when you use an extended battery.

 

[abhinav quietly brilliant]

I too tried it before quick start the battery level was 56% and after quick start battery level dropped quickly to 26%

Sent from my GT-N7000 using Tapatalk 2