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[Q] How to calibrate battery

My Galaxy Tab have problem with battery. Please let me how to calibrate battery. Thank everyone

overkilli900 said:
My Galaxy Tab have problem with battery. Please let me how to calibrate battery. Thank everyone
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any details? rom (custom or stock)?

ovigt71 said:
any details? rom (custom or stock)?
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Stock rom. Each cycle, i use 15% to 3% it suddenly.

overkilli900 said:
Stock rom. Each cycle, i use 15% to 3% it suddenly.
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Very strange! With stock rom my battery it drain in 2 days and aprox 10 hours. Have you try to discharge full the battery until the phone is switching off by it self, than make a full charge without starting. After that start your device. Try this...

ovigt71 said:
Very strange! With stock rom my battery it drain in 2 days and aprox 10 hours. Have you try to discharge full the battery until the phone is switching off by it self, than make a full charge without starting. After that start your device. Try this...
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Click to collapse
I tried but not effective

overkilli900 said:
I tried but not effective
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I think is better to check with service for a further investigation......it shouldn't keep less than 2 days......have you check what services running in background? any application which has not stopped and drain the battery?

what's nice about android is that if you go into device info, you can see battery usage.
it shows quite accurately what's draining your battery. today I saw that cell standby service was draining 13% of my battery, and I don't have a simcard inserted, so I put the tab into flightmode.....
that your batterylevel jumps from 15 to 3 percent is strange. reminds me of ios.
you play a game afterwards you've got like 30% left, after a few minutes it jumps back up to 50% or something...

1)completely discharged battery
2)battery charging and when fully loaded delete file with root explorer of the route "data/system/batterystats.bin
3)restart device

my experience :
1. keep using the gtab till the battery 15% or less then
2. charge the gtab till 100% then
3. repeat the #1
it works for me

Most Battery Saving 2.3.3 Rom (with Touchwiz 4)

Hello there,
i've been on MIUI for a couple of months now, but i didnt get over 1 day of moderate usage except on MIUI MCGV 2.2 i think.. But now the lates ist 4.3 and i dont want to reflash an old MIUI-rom just for battery.. So what is the best and latest rom with touchwiz 4 and least battery drain?

Hi,
For me the best battery rom is DebusRom http://forum.xda-developers.com/showthread.php?t=893385
....and I tried a lot of others rom..
Cheers.

It doesn't matter wich rom you use. Its the matter of right battery stats. I've made my own and now my sgs runs in 48 hours of average use.

Taxiozaurus said:
It doesn't matter wich rom you use. Its the matter of right battery stats. I've made my own and now my sgs runs in 48 hours of average use.
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48 hours ? how is this possible ?

sohebq said:
48 hours ? how is this possible ?
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Its simple, use juwe's ram script and fix battery stats by cleaning them and run 3-4 batt. cycles from full charge down to 0% untill phone turns it off and charge it when it's turned off. My 48 hours were gotten by this way.

Taxiozaurus said:
Its simple, use juwe's ram script and fix battery stats by cleaning them and run 3-4 batt. cycles from full charge down to 0% untill phone turns it off and charge it when it's turned off. My 48 hours were gotten by this way.
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Click to collapse
I thought ur battery actually lasts for 48 hours after a single charge,,,

[Q] Is the battery life normal or faulty unit?

Hi,
Got the xperia z(c6602) for 10 days now, and am little worried about the battery life, yesterday got the firmware update to bulid no 10.1.A.1.434.
and wanted to clarify whether the battery is working properly or not, I got 17hrs 30 mins from the battery with 3g on and in which the phone was not touched for 6hrs,( though is not kept in stamina mode) . Total screen time is roughly 2hrs 30 mins.. attaching pics of the battery stats.. What should be the total display time to drain the battery from 100% to 0%, and how to determine whether this battery is faulty or not

somojitkumar said:
Hi,
Got the xperia z(c6602) for 10 days now, and am little worried about the battery life, yesterday got the firmware update to bulid no 10.1.A.1.434.
and wanted to clarify whether the battery is working properly or not, I got 17hrs 30 mins from the battery with 3g on and in which the phone was not touched for 6hrs,( though is not kept in stamina mode) . Total screen time is roughly 2hrs 30 mins.. attaching pics of the battery stats.. What should be the total display time to drain the battery from 100% to 0%, and how to determine whether this battery is faulty or not
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Click to collapse
I get 3:45 - 4 hours with 3g on and playing GTA vice city and RealRacing 3 and facebook and whatsapp all day long...I got to this stage by removing google+ which ******** kills the battery..look for apps that drains to much batt power..

PeZoII said:
I get 3:45 - 4 hours with 3g on and playing GTA vice city and RealRacing 3 and facebook and whatsapp all day long...I got to this stage by removing google+ which ******** kills the battery..look for apps that drains to much batt power..
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I cant even get such figures in my dreams, playing games is simply out of question, as it drains battery rapidly and google+ is already inactive in my ph. i have attached the pics to show what apps i had been using, simply used ph for checking emails and whatsapp. and screen time is 2hrs 30 mins.. brightness at 20% does it imply i have a faulty battery.

Iam sorry but, I do not think this is bad battery life.
2 hours onscreen 13,5 in stand-by 6 \ 7 % phone calls and your battery is still green.
Not to mention it seems like your 3G is on and you do not use stamina mode.
Kind regards, Stefan.

Does that mean that i have a faulty unit?
Should i take it to the sony service centre, for replacement. ? Need help..

Well no, not at all.
I think the battery life of your Xperia Z is acceptable.
To give you something to compare with:
My Xperia Z is on battery for 12hours and 42 min now.
Battery left: 51%
2hours and 12 min of this are on screen time.
Only use my signals when needed and I do use stamina mode.
Iam pretty sure if you manage you signals properly and use stamina mode you get aprox the same results.
Yours and mine do not differ to much.
Iam pretty sure you could drain any smartphone its battery within 5 hours of onscreen time.
This the Z gives me aprox 4 depending on what I do, Id say its acceptable.
Kind regards, Stefan.

Thaevil0ne said:
Well no, not at all.
I think the battery life of your Xperia Z is acceptable.
To give you something to compare with:
My Xperia Z is on battery for 12hours and 42 min now.
Battery left: 51%
2hours and 12 min of this are on screen time.
Only use my signals when needed and I do use stamina mode.
Iam pretty sure if you manage you signals properly and use stamina mode you get aprox the same results.
Yours and mine do not differ to much.
Iam pretty sure you could drain any smartphone its battery within 5 hours of onscreen time.
This the Z gives me aprox 4 depending on what I do, Id say its acceptable.
Kind regards, Stefan.
Click to expand...
Click to collapse
If you install some kind of backgroud task killer your Z gets better results. I got mine with Du battery saver and dx toolbox and got it runnig for 1d16h26m, and it stays it got battery for 3 more days (stamina mode on, all Google backgroud apps, FB apps and a few more are dead ).

I do not want to use a task killer, but freeze apps I do not use using Titanium backup.
3 days standby is easy when you do not much with the phone yes.
I achieved this aswell, just saying 12 hours in standby with 2 hour of onscreen use and 51% left is not bad imo.
Kind regards, Stefan.

Thaevil0ne said:
I do not want to use a task killer, but freeze apps I do not use using Titanium backup.
3 days standby is easy when you do not much with the phone yes.
I achieved this aswell, just saying 12 hours in standby with 2 hour of onscreen use and 51% left is not bad imo.
Kind regards, Stefan.
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Click to collapse
But in my case 6 hrs of standby, with 3 hrs of screen time and total 18hrs plus (without stamina mode) is it suffiecient??

Install betterbatterystats from 100 to 10 and post screenshots of partial wake locks and alarms.
Sent from my LG-P990 using xda premium

I had same problem man..and i was shocked with it.. İ got really disappointed with my battery but after reflashing stock rom with SEUS and full offline charging for like 5 hours am ok with it now but i am still waiting for more with 4.2.2 update!!!
Sent from my C6602 using xda app-developers app

Don't think 4.2.2 is a saviour for the Z. Once my Nexus 4 got 4.2.2, battery life went significantly downhill...

[Q] Xperia z battery draining

Hellow I'm a happy owner of the xperia z for 10 days, but I'm facing fast battery drain when using the phone. When Im just browsing the phone, battery goes down 1% percent every 3~4 minutes... When gaming battery drops 2-3 % every 5 minutes. I need some help, I didnt charge the phone the first time for 8 hours, but i read it is not necessary. I'm rooted, 4.3 jb, doom kernel v21. I have deleted some of the bloatware and i don't have WiFi and data on all the time. Also media server sometimes goes up to 21% in battery usage.

vk12fe-gr said:
Hellow I'm a happy owner of the xperia z for 10 days, but I'm facing fast battery drain when using the phone. When Im just browsing the phone, battery goes down 1% percent every 3~4 minutes... When gaming battery drops 2-3 % every 5 minutes. I need some help, I didnt charge the phone the first time for 8 hours, but i read it is not necessary. I'm rooted, 4.3 jb, doom kernel v21. I have deleted some of the bloatware and i don't have WiFi and data on all the time. Also media server sometimes goes up to 21% in battery usage.
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That battery drainage seems normal to me. Playing games needs alot of battery. Battery usage depends on several things, how high is the screen brightness etc.. To your media server: are you listening to music with your phone? Or watching videos? All this is done by media server.

St.Jimmy90 said:
That battery drainage seems normal to me. Playing games needs alot of battery. Battery usage depends on several things, how high is the screen brightness etc.. To your media server: are you listening to music with your phone? Or watching videos? All this is done by media server.
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Some people are reporting 5 hours on screen time. If I game for one hour, i can barely get 3 hours on screen time. My usage is 30 minutes Web, music. For about one hour and a half, gaming 1 hour tops, and some browsing the phone.

vk12fe-gr said:
Some people are reporting 5 hours on screen time. If I game for one hour, i can barely get 3 hours on screen time. My usage is 30 minutes Web, music. For about one hour and a half, gaming 1 hour tops, and some browsing the phone.
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Stop gaming and you'll see that you will get 5 hours... Playing is what drains your battery that fast

St.Jimmy90 said:
Stop gaming and you'll see that you will get 5 hours... Playing is what drains your battery that fast
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Without gaming, only with Music, some browsing the phone and the Web, I barely get 4 hours on screen time, for example, battery has gone down 6% from my last reply.

vk12fe-gr said:
Without gaming, only with Music, some browsing the phone and the Web, I barely get 4 hours on screen time, for example, battery has gone down 6% from my last reply.
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Are you using mobile data or wifi? Mobile data needs more battery than wifi. Also what is your screen brightness?

St.Jimmy90 said:
Are you using mobile data or wifi? Mobile data needs more battery than wifi. Also what is your screen brightness?
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Right now my screen brightness is set to 0 and I'm using only WiFi, nfc is on though. I have set the phone to only GSM, data is off.from my last reply i ve lost 2 percent

Umm how old is your battery? Are there background apps running?

St.Jimmy90 said:
Umm how old is your battery? Are there background apps running?
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Click to collapse
Most times i close some, and.the phone is new.

1% every 3 minutes or so is not excessive drain. If you do the calculations, then that works out to 300 minutes to fully drain the battery, or 5 hours.
As the phone is new, it will take a few charge cycles for the battery to reach full capacity anyway, so see what the battery life is doing in a week or so.
Sent from my C6603 using Tapatalk

kingvortex said:
1% every 3 minutes or so is not excessive drain. If you do the calculations, then that works out to 300 minutes to fully drain the battery, or 5 hours.
As the phone is new, it will take a few charge cycles for the battery to reach full capacity anyway, so see what the battery life is doing in a week or so.
Sent from my C6603 using Tapatalk
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As i know is not good to totally drain the battery. For example, i was talking to the phone and had wifi on right now, and my. Battery has gone down 14% in the last thirty minutes. My on screen time is at almost 2 hours, without gaming, and my. Battery level is at 43%
Edit i set screen brightness to 35%, my battery level is 41%. Sometines phone draws 1% every 2 and half minutes.

Yes, I know you shouldn't completely drain the battery. Total screen time calculations should be based on the full capacity though, or I could say I only get 1 hour screen on because I always recharge the battery at 80%! (I don't. It's an example).
Using the phone in different ways will drain the battery faster than others. The battery usage you described in your first post is not unusually high and will probably improve after a few charge cycles.
Sent from my C6603 using Tapatalk

kingvortex said:
Yes, I know you shouldn't completely drain the battery. Total screen time calculations should be based on the full capacity though, or I could say I only get 1 hour screen on because I always recharge the battery at 80%! (I don't. It's an example).
Using the phone in different ways will drain the battery faster than others. The battery usage you described in your first post is not unusually high and will probably improve after a few charge cycles.
Sent from my C6603 using Tapatalk
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Click to collapse
Okay, let's hope battery improves. Thanks for the info. No what I really wait for its kit kat official >

Battery dropping from 12% to 0% in a few seconds

My battery is dropping from 12% to 0% in a few seconds and phone shuts down.
See attached screenshots from battery graph and better battery stats.
During normal use until 13% discharge is normal.
Any help is appreciated.
Thanks

I would like to see some feedback about this, as well. I'm experiencing the same thing.

junta_mpb said:
I would like to see some feedback about this, as well. I'm experiencing the same thing.
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I have google around but no real solution.
I have tried calibrating battry, let's see what happens

Battery calibration is something you should do!
If it doesn't work try different FTF Files for your device or even use PC Companion to repair your device...
If you could try custom roms it would be better because if the problem still remains it means there is a hardware problem(Probably battery replacement will be needed).

comeon, no one with a real good idea about source of the problem and its solution?

thegios said:
comeon, no one with a real good idea about source of the problem and its solution?
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use your phone untill it turns off - boot into recovey with power then volume up
charge your battery while on recovery twrp from 0 to 100 ( leave it just to charge it may take up to 5 hours )
test again if worked fine on discharge from 12 to 0 so u have a kernel problem
you may change the kernel or try another rom

mimotata said:
use your phone untill it turns off - boot into recovey with power then volume up
charge your battery while on recovery twrp from 0 to 100 ( leave it just to charge it may take up to 5 hours )
test again if worked fine on discharge from 12 to 0 so u have a kernel problem
you may change the kernel or try another rom
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Click to collapse
Ok, I have tried all possible methods
- using an app called BatteryCalibration
- using the charging mode suggested above
- deleting manually the battery stats file
Phone still goes from 12% to 0% in seconds and shuts down.
I DO NOT BELIEVE IT IS A KERNEL PROBLEM because I have the original .157 sony ROM, just rooted with a few crapware disabled
I DO NOT BELIEVE IT IS A BATTERY PROBLEM because I have tried the following: when phone goes from 12% to 0% and shuts off, I plug it in, wait that it charges for say 10 minutes, turn it on, battery is at 4%, unplug it, phone runs for at least 40 minutes (it should shut down).
So it really seems to be a bad reading...

Hmm, i have same problem with battery , when battery is 32-35%, screen off dropping to 22-25% in some minute, but wheni test with screen on 32-35%, don't have problem
It difficult question to answer

bibica said:
Hmm, i have same problem with battery , when battery is 32-35%, screen off dropping to 22-25% in some minute, but wheni test with screen on 32-35%, don't have problem
It difficult question to answer
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Click to collapse
It is not the same problem.
My problem is that when the phone (after several hours, also of intensive use) reaches 12% in a few seconds it drops to 11% then suddenly to 0% and it shuts down.
Then, If I charge it for 10 minutes, unplug and turn it on, battery is at 4% and lasts for another hour: this should prove the problem is not the battery but its reading.
And deleting batter stats is useless, besides this being a myth...

thegios said:
My battery is dropping from 12% to 0% in a few seconds and phone shuts down.
See attached screenshots from battery graph and better battery stats.
During normal use until 13% discharge is normal.
Any help is appreciated.
Thanks
Click to expand...
Click to collapse
same here
first screenshot is the normal of the battery
second screenshot when it starts to do the problem not a big problem
third pic is the problem big problem ( fast drain and fast charge )
also the fourth pic is how my battery last from 100 to 15 about 6 hours hardcore usage and after that 2 or 3 mins max 0 :/
i dont have this problem on sony stock rom 108 or 157 seems fine no fast drain or fast charge just on any other rom that problem happenes
iam now on cm11 phone model c6902

mimotata said:
same here
first screenshot is the normal of the battery
second screenshot when it starts to do the problem not a big problem
third pic is the problem big problem ( fast drain and fast charge )
also the fourth pic is how my battery last from 100 to 15 about 6 hours hardcore usage and after that 2 or 3 mins max 0 :/
i dont have this problem on sony stock rom 108 or 157 seems fine no fast drain or fast charge just on any other rom that problem happenes
iam now on cm11 phone model c6902
Click to expand...
Click to collapse
I do have original z1 stock .157 rom and I while ago had not this problem.
And yes, it seems that from 100% to 12% it takes ages even with heavy use then suddenly in 3 seconds drops to 0%

thegios said:
I do have original z1 stock .157 rom and I while ago had not this problem.
And yes, it seems that from 100% to 12% it takes ages even with heavy use then suddenly in 3 seconds drops to 0%
Click to expand...
Click to collapse
i tested every kernel out there for cm11
it is about bad reading from battery
but as no offline charge on cm roms
so no calibiration

So what is the solution?
This morning it dropped from 42% to 21% in a minute and then to 0% in seconds. I put charger on, left it charge 3 minutes, turned it on, batt was at 5%, unplugged and phone remained awake for 20 minutes during use
There must be a way... Full reset maybe?

thegios said:
So what is the solution?
This morning it dropped from 42% to 21% in a minute and then to 0% in seconds. I put charger on, left it charge 3 minutes, turned it on, batt was at 5%, unplugged and phone remained awake for 20 minutes during use
There must be a way... Full reset maybe?
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Click to collapse
tested everything wiped and fresh install still the same

mimotata said:
tested everything wiped and fresh install still the same
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Click to collapse
I will try removing sd card, even though I do not see why that would be a problem

Same problem.
Tried
>PC Companion Repair
>Batt calibration
>flashing Stock rom using flashtool
Still drops to 0% when it reach 50%
Maybe a battery problem?
We experience it all by now maybe because our z1 is more than a year old and battery maybe affected?
Sent from my C6903 using XDA Free mobile app

noteandfound said:
Same problem.
Tried
>PC Companion Repair
>Batt calibration
>flashing Stock rom using flashtool
Still drops to 0% when it reach 50%
Maybe a battery problem?
We experience it all by now maybe because our z1 is more than a year old and battery maybe affected?
Sent from my C6903 using XDA Free mobile app
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Click to collapse
Try this: when it reaches 50% and shuts down, while phone is off, plug it in, wait 10 minutes, turn it on and unplug it. Phone should be at 8% or so, and will last normally now.

thegios said:
Try this: when it reaches 50% and shuts down, while phone is off, plug it in, wait 10 minutes, turn it on and unplug it. Phone should be at 8% or so, and will last normally now.
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Click to collapse
Yeah from playing like 30 minutes of games it will shuts off. But i wait for my phone to cool down for like 10 minutes then turning it on , i now have 45% battery but will drain badly again even for like using the camera.

nikkorob said:
Yeah from playing like 30 minutes of games it will shuts off. But i wait for my phone to cool down for like 10 minutes then turning it on , i now have 45% battery but will drain badly again even for like using the camera.
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Click to collapse
Same to me.
We all experience the same thing.
Anyone consulted Sony Service Center regarding this?
Sent from my C6903 using XDA Free mobile app

thegios said:
Try this: when it reaches 50% and shuts down, while phone is off, plug it in, wait 10 minutes, turn it on and unplug it. Phone should be at 8% or so, and will last normally now.
Click to expand...
Click to collapse
noteandfound said:
Same to me.
We all experience the same thing.
Anyone consulted Sony Service Center regarding this?
Sent from my C6903 using XDA Free mobile app
Click to expand...
Click to collapse
sir are u Filpino ? one of d users of this server have suggested me to bring my unit to the sony center. it seems my phone's battery have already expanded. That same thing have made my phone's backcover to open (on the middle part where the battery is located).