yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] martin707:
Its so weird. Just attempted to calibrate twice. This is my 98%.

app_135@android:/ $ export PATH=/data/local/bin:$PATH

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3970000

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3950312

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3951875

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3970625

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3975156

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3974375

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3967500

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3967968

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3944375

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3963437

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3972812

app_135@android:/ $ cat /sys/class/power_supply/battery/voltage_now

3963750

app_135@android:/ $

Do i need to flash my rom again and do the procedure again?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Phibs:
Modem

Hi,

Nope, never tried. Can I flash a new Modem using Odin without CWM and maintaining the device with the binary count at 0.

Thanks
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Toldo:
Yeah, you can flash modem.bin through Odin.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Phibs:
Modem

Problem persists with kl4

Its driving me nuts.

When in flight mode, no deep sleep.

With Flight mode off 10 hours of deep sleep.

I'm gonna try with kl1 but....:crying:
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] bender7j:
Do I need my 10.1 to be rooted for the calibration to work?

I've followed the instructions below with no luck. Of course I had to skip step 1 since I'm not rooted.

As a side note, when i look at my battery stats, the screen seems to be the main reason for the fast battery drain. Over a period of 18 hours, my tab went from 100% to 7%, yet during that time, the screen was on for less than 30 mins. The device stats attribute 92% of the drain to the screen, 5% to device idle and 2% to android. (leaving an extra mystery 1%) Has any one else seen this? I have not seen another mention like this in the forums.

I'm running 4.0.4 kernel version 3.1.10 on an un-rooted GT-P7510. I should be noted that I've been having a similar problem since I bought the GT and even sent it into Samsung, only to have them return it 2 weeks later with the news that they upgraded some software for me. On calling them, they insisted there was nothing wrong with my device, but i'm not sure they took a close look Things got a bit better better when i rooted and ran some different ROMS, but for the most part, this has always been a problem with this device.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
@Bender7j

When you see your tab reports 7% left, do next thing.

Get terminal from market.

Type in terminal:

cat /sys/class/power_supply/battery/batt_vol

Hit Enter. What is the number (voltage) ?

It might be that your tab does not sleep well vs. callibration problem.

PS: if terminal is too much for you then try to find some battery monitor app which should report current battery voltage.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
3970mV - it's more like 85%. It's either FG chip got mis-callibrated or battery went bad.

1) Connect charger and charge it to 100% - what would be voltage then?

2) And then disconnect charger and monitor voltage, how fast it will drop?

3) What would be voltage when FG reports close to 0% of charge?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Leogp:
my battery is draining in less the 5h

Hi folks

I'm having a hard time figuring out what's going on with my battery. I've read a lot of posts and tried a few different solutions but nothing worked.

What happens is that I unplug the charger and shows 100%, after 2m is already on 97%. It drains around 20-25% per hour when in use (I mostly use to check websites, hardly play games and watch movies). Funny thing is that when not in use, idle, drains only around 2-3% per hour, sometimes even less than that but, as soon as I turn the tab on, the battery starts to drop rapidly.

I've tried to re flash the rom, currently using Ganbarou Ics on my 7500, also did not worked. I'm going mad here coz can not really on it for a longer period.

Any suggestions people?

Thx
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] martin707:
I had THAT exact issue. What i did was just followed the instructions here except that i drained it boot to CWM when i saw it was about 10%. I drained it until i couldnt turn it on. Waited for an hour. Plugged it for 5hrs. Unplugged it and waited for another hour. Then i booted it. At first i got 97% upon starting it (which should be 100%). So i plugged it again up to 100% and ran the console to see if its about 4100+ then used it normally. Issue is now gone. Ive been using the rom for about 3 weeks now
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Leogp:
I'll try and do it today and then post the result. Last night while in idle, drained 1% in 5h. I switched on and after 5min drained 4%. Just INSANEEEEEEE

:eek:
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Leogp:
Well, just switch on my tablet after trying the above method and did not work. I really hopeless now...
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] sooramma:
The issue can be solved by Samsung only by an update, because the battery drain is on account of (h2_hsic wakelock) a bug in ICS.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Leogp:
That means I need to put it back to stock Ics?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Toldo:
That means we all need to wait till Samsung hopefully releases another update.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Leogp:
That sucks....
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] dana4publicity:
Another Tips for slove it

trying........
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] perfp:
Wow. This really worked. Thank you very much!
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] davsarus:
I've just seen 3275 value in CWM/recovery through adb shell, while trying to calibrate.

Does that mean something?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] nutstan53:
I did the first battery calibration but I still fell it didn't work, how do you guys perform the other one? where can I see the voltage?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] regulator21:
OS Error

My Samsung tab 2 7.0 brought up an "error with the OS" message after accidentally did a soft shut down. Now the battery is just draining very fast. I had first thought it was because of the new case I got that has magnets in it, but ive learned that the affect is negligable. Will a calibration take care of this issue with draining? any help is appreciated.

Lance
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Toldo:
Just for information, calibration didn't work for me so I decided to go hard and open up the housing. It is quite easy, when you have some old plastic credit card (start from the shorter side and continue towards the bottom side with the socket). Disconnected the batter for like 5 minutes and it seems to be working now correctly. For the scarred ones - there is no warranty seal so you won't void it.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] rupene:
awesome

Awesome - had updated to ics and battery was draining overnight. tab now working fine. This post needs to be a sticky.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] nexus_g:
Hi guys,

I install A1 kernel on my cm10 and got batt bug. So I flashed back the original kernel and followed the instruction on page one and get rid of the bug. My tab is back to normal again. Question still remain, if i could still use A1 kernel, will it give me the batt problem again? In other words, can we still use the kernel that give the batt problem after caliberation?

Thanks Vlad_z for his contribution on this problem.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Serpentene:
It's a panacea effect.. Deleting the .stat file does nothing useful for battery drain.

Allow the battery to fully discharge and auto shutdown. Recharge 50%. Deplete to warning.

Fully recharge 100%. Stat file will gauge appropriately by third round recharge.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] HD-McSlacker:
This worked for me. It actually even worked just by shutting down my tablet for an hour or so, and then charging it overnight. It went from going dead in less than an hour, to now having run for the past 24 hours on a single change. And I haven't even done the second shut down as you've recommended. Thanks!
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Lucas Kado:
It does the trick

Simple. How many things have been said about how to correct this issue?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] drD16:
my galaxy tab3

I followed all the steps, and quite idiotically my battery indicator fell from 97 to 48percent in 2mins! I have switched off the tab and chk out tomorrow.... at first I thought there is problem with battery, but thn I found tht my tab lasted for about 4hours of heavy usage with just 1percent battery signal(ofcurs that's terrible as the brightness falls to zero) hope ur tech works for me! thanks in advance
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] TTboy404:
my goodness

Mine had become nonfunctional due to power issues like this. it got to where it run for maybe a hour or two, sometimes even less. Last week, it would run for like 20 minutes and shut off.

Last time i sent it in to samsung, 70.00 repair charge, and it did the same thing over time.

I got disgusted in July, and was going to buy a LTE ATIV Q, which never showed.

Then Note 10.1 2014 LTE in October, which has really never showed up either.

On whim, i got disgusted, and just restored back to factory. Orignial factory last week.

While upgrading via OTA, charge on battery went from like 10% to 75% after an OTA update. I had put that Team Battery bar on it, so it was obvious what just happened. Almost in front of my eyes, i was driving, and it rebooted between exits. Yes, i know i should not hack and drive...lol

That isn't battery. Thats battery meter or software or something. Physical battery, must be fine.

Restored to Stock Verizon Out of the box, Honeycomb a second time yesterday, and it ran 13 hrs on battery in standby today alone. Battery itself almost has to be fine.

I will read this thread again.

thanks!

I will update.

The official OTA updates is respnosible for the battery issue.

I restored again back to factory Honeycomb, because I have nothing on the tab.

This last time, After the first update, and one of the next OTA updates did the exact opposite as last time. My battery went to 70 to 2, then proceeded to die.

Instead of assuming I was out of charge. I turned tablet off, and let it set for an hour, no charger.

Reboot, back up to 70%

I cracked the case this time. Its easy, take care around the ear phone jack.

The battery has a simple connector right in the center, you just pop up. I let ithe tablet sit for about 20 minutes to make sure there was no residual charge in circuit

Been averaging standby for 16 or more hours. Yesterday it kinda unepectedly quit, but I had been on LTE for over 5-6 hours, tablet had been running on battery for a couple hours before.

Might look for a new ROM, if all I have to do, is crack the case, and reset the battery.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Doosh:
As others have posted here - I have the problem on my Son's tab 3 - 7.0 using RocketTab distro.

I opened up the back using a guitar pick and some patience. (you run the pick along the top edge where the screen meets the side of the unit. Once the pick is in, gently pry up. It will take some patience and several passes around the entire device but after about 2-3 minutes of prying it will come loose.)

I then used the guitar pick to pry up the battery terminal and let it set unplugged for about 20-30 minutes.

Plugged it back in and so far the problem seems to have corrected itself.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] kllnn8:
thank you for this thread ill try this tom.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Greencrow:
Going to try this out! :) Hoping for a good result
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] duendemago:
I will try that tomorrow

I have this problem: GN 10.1 2014 used to charge in the regular amounts of time described at this forums (4 to 5 hours). Even when watching Youtube or Netflix or whatever video-multimedia content, the tablet used to charge a little bit slower, but going up steady and constantly. Now, the dam thing goes down while watching multimedia (even with the lowest brightness and no apps running other than youtube), and chargers very slow while in sleeping mode.

I hope this helps me to re calibrate this thing. Does someone know how to prevent this to happen once and again? is there any real working app for doing something like this without ROOT permissions?

Thanks great community of XDA :cyclops:
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] duendemago:
Red X after following all your steps

Ok, I tried all the steps as you described above, in your original post. Now I have an AWFUL RED X on my battery icon. So what can I do? Please help me guys!!!! :confused:
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] atackla:
anyone knows if this is going to work if I interrupt the 5 hour charging process?

I'm at work atm and I drained down to 3400 and shut the thing off it'll be an hour in 30 mins so I'll start charging it up but have to leave work in two hours, is it ok to plug it out and go home? I'll put it back on in an hour or so..

cheers
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Mendox:
Use another/better cable. It will help.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Katrinasawyer:
I got my daughter a samsung galaxy tab 3 10.1 she bent the unside of the charger port i got it fixed but now its taking hours to charge and before 8 got it fixed it was charging fine what can i do to fix it
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] thorondrol:
It worked

I came here with little hope to fix the battery drops on my samsung galaxy tab pro 8.4 (what a long name for a tablet), and i'm very pleased to say that it did work...Before I was getting a drop from 90% or 70% to 35%-15%....now everything seems to be working fine. Thank you for the help :)
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] cwhiatt:
Will this work for Samsung Galaxy S6?

I have a Samsung Galaxy S6 (not the Edge) which has a battery out of sync. It is rooted and calibration has not worked.

Forgive me if this is addressed within the thread. I spot checked and didn't see it mentioned but I really would like to believe that it will work not just for the tab.

Thanks
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Ionpirjan:
Hi guy's

My tab. S is charging very slow about 10% in 3 hours. I check the charger on my phone and is OK. What can I do?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] mahouny:
Check the battery connector's solder joints. ...

This is old topic, however I would like to wrote for those of you who have the problem with incorrect battery reading, extremely fast battery drain,sudden battery charge level drop....

The problem is caused by cracked (broken) soldering joints of battery connector !!!

I've ecountered all above problems for almost one month on my Samsung Galaxy Note 10.1 2014 P600, so I replaced the battery, but that didn't fix the problem.

Until the day when I wanted to disconnect the battery to do "battery calibration"

And then I saw that the connector is slightly lifted up when I started unplug the battery.

When I looked to the solder joints with the magnifying glass, I saw that they are cracked.

That created a faulty contact and all above problems with battery charging and level gauge reading.

Fortunately, I have the soldering iron with very small tips, so I applied some amount of flux to connector pins and re soldered them.

The problem is fixed now !

The tablet is working again, as before. With the battery drain between 8 and 10% per hour, when browsing the Web, watching youtube and so on.

Don't forget to unplug your battery first!

And when you will do it, slightly press on battery connector which is soldered to PCB, so you will not tear it appart from the PCB.

Best regards
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] jasperkemmp123:
Hi Vlad, in terminal, my voltage level seems to increase while the battery level goes down. Also it reads 3716000 instead of say 3716 . Is this right? Thanks in advance
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] mixend1981:
Have anyone tried this on tab s 8.4(sm t705)? Mine is charging and draining very quickly like 35% in 50 min so I am just considering to give it a try before opening the tab to check the loose battery connector.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] UncleMarty:
Just wanted to post my thanks. I'm using a custom marshmallow aosp rom and my battery totally went crazy. With screen on lowest and just surfing on chrome my battery was going down even plugged in to the stock 2 amp charger, cpu clocked down, virtually everything greenifyied. I used this method yesterday/last night and since doing so I've been testing by playing with screen on full, plugged into charger and heavy games and my battery has sat at 100%, unplugged it went down by a couple of percent (which was great). My battery problem has totally gone! Thanks so much for posting this!!!
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] immzy:
Samsung Tab 337a

I have samsung tab sm-t337a, the problem is with my tab that it takes longer to charge while discharging is a bit quick then expected so do i have to try this method of calibration as mentioned in this thread. Also to mention that i am using completely stock firmware, kernel etc haven't modified my tab a bit since i got it.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] test3343:
The confusion about why the battery level drops quickly when running apps, but drops very slowly (1-2% per hour) when idling has little to do with battery calibration. It has something to do with high battery internal resistance.

When the load is light (low current), the voltage largely reflects the state of charging: 4.2V means 100%, 3.2V means 0%. However, as soon as the load is heavy (high current), the voltage will drop by (high current x high internal resistance). Because voltage is the only indicator of charging/discharging, and it's never safe to discharge below 3.0V, the circuit will mask a rapid drop of battery level when load is heavy.

High internal resistance is a sign of either battery aging (too old) or battery quality issue. This is not something you can calibrate away. You must replace the battery or struggle with the strange behaviors.

But I really appreciate the efforts vald_z puts in to figure out how to calibrate without root access.

For people to see the voltage drop under heavy load, install android app like battery doctor. It has a page that shows the current battery voltage, and the remaining capacity and estimate overall capacity. You can play with screen brightness to see the voltage drops as much as 0.3V or more.

Too bad Samsung has made this a living hell for the customers.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] UncleMarty:
Interesting post and a good read. Nothing personal but im a fact check whore so i dont suppose you have a link that supports what you wrote in some way and might give me even more insight? It sounds like you have some good electronics experience and id love to save myself lots of googling if you have something handy ;)
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pellegj:
I have this as well on my 7500. I had fully charged before i got to bed last night and turned it off. This morning i ran it down to 19% and turned it off for 5,5 hours. Guess my surprise when i turned it on again and it said 64% remaining. I have tried all afternoon now, and every time it says it's under 15% i turn it off for 5 minutes and turn it back on, and it's back up to a bit over 50%, and draining fast. I'm gonna try to drain the battery as much as possible and then turn it off for an hour, charge it over night and turn it off for 5 hours and see what happens.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] jzen:
Did this happen to you after you installed Pershoot's kernel? I just want to find out if it was something in the kernel that caused the battery drain issue, in my case I'm pretty sure it was the kernel... As of right now my tablet is sleeping for 3 more hours before i can check it out and see if it worked...

I have Doc's slim 6.5 installed with his modified stock kernel... It took 2.5 hours to drain down to 40% (full brightness, 1ghz, all options set on, GPS,WIFI,ect...) Does this sound normal? If so It may have just fixed itself after flashing stock 3.1 rom then doc's slim ontop of it... Thanks all for your support <3
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] FillTheVoid:
It happened to me after installing pershoots kernel. I noticed it right after I used the set on boot feature of Setcpu to overclock on start up.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] wlighter:
I have the same setup as FillTheVoid. perhoots kernel oc at bootup. I never try to uncheck this option previously, so i dont know if this option cause the issue. Anyway i doubt it will make a difference now since the fuel gauge is all screwed up.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pellegj:
Yes and No actually.

I had pershoot's kernel installed when it started, running secretfile's rom (installed the kernel right away after installing the rom, just booted the rom once, then rebooted to cwm and glashed the kernel). However, I've been running pershoot's 8/9 kernel on stock rom before it started without any problem. So, for me it started in combination of secretfile's rom and pershoots kernel, but i can't say which of it caused the problem.

I now fully charged it over night and wiped battery stats first thing this morning, gonna let it run and see how it goes. I'll back to report later.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] FillTheVoid:
My previous posted method of calibration (what the op says) did in fact stop the battery from super draining then going back up after reboot. I can't say for sure if the battery is completely back to normal, I have nothing to compare it to but as far as I can tell I'm running normal again.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] wlighter:
you should be looking about 10% per hour battery usage for normal browsing on wifi
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] wlighter:
this is stock rom with our without TWUX?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] FillTheVoid:
Yep I'm back to normal then. I'll check some battery stats tomorrow, and post them, when I'm actually off the charger for a while just to be sure.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pellegj:
With TWUX.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] wlighter:
Ok, I manage to get the battery calibration to work finally. I verify it by using it for a while (let it drop 5%-10%), record down the battery %, restart, and check the battery % again. If its the same means its solve.

The following steps work for me:

1. Drain down to below 40% (value after reboot; i believe this is the real value) the fake value can be anywhere... so i wont quote that.

2. Turn off for 1 hour

3. Turn on and charge to 100%

4. Turn off for 5 hours

This is with pershoots kernel, disable apply on boot in setcpu.

If set to 1.4Ghz my usage is about 3 minute for every 1% of battery. Which is about 20% per hour of usage.

If set to 1Ghz my usage jump to 6 minute for every 1% of battery. Which is about 10% per hour of usage. Which is what is expected base on the stock rom.

I will report more if i found anything.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pellegj:
I been playing Tower Raiders 2 now for about 2 hours after fully charged and wiped battery stats, still at 77% remaining, looking good so far.