yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Evan2ac:
I agree. The problem is the devs refuse to to add a disclaimer of the issues. Im sure if some of the people in this thread knew flashing other kernels and ROMs would cause this battery damage (which it does as statistics dont lie) they wouldnt do it.

If you can do anything to help protect people from this issue it would be to state a clear disclaimer of this issue in all aftermarket kernel and ROM threads. Why is this not being done? :confused: You cant argue with the dozens of people here who have gotten this issue after they flashed ROM/ kernel.

Be aware that I know you may not value me or my tablet but I ask for you to value others as they spent their hard working money on these tablets and it hurts me to see their units become crippled like this.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pinghsien422:
Ok gotcha, but how would i know it's 100% charged without turning it on? Can't even use adb without at least boot it into CWM. I suppose I could just leave it charging overnight, that should surely be fully charged after 8-10 hours...
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pershoot:
exactly. you spend your money, and we make it multiply overnight. we do things the manufacturer wouldn't dream of doing (sometimes), and/or did not implement. you get to see development right before your eyes and be a part of something great in the making. for example, if i didnt value everyone's tabs, i wouldn't work so dilligently to perfect things across numerous devices. if i didn't care to make said device great (to the best of my ability), i wouldn't post anything. i like to share and have everyone reap the benefits.

you are not protecting anyone by alienating yourself, in the way that has been done, thus far. this makes your core statement/focus lose credibility by the tenfold.

here is a better way to phrase something:

hey. im receiving xx issue. any logs or something i can get for you to try and rectify the issue?

that would help a ton of people.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pinghsien422:
Evan2ac, I think we should all appreciate that the xda devs are even doing this in the first place. They are not being paid to do this, it's not their job to support or protect anyone. They did this for their interest and out of good intention to share and help the public make their tablet better. I think it is our responsibility, not theirs, to carefully research about the target ROM before flashing it. After all, it is our tablet, not theirs, and we made the decision to flash the ROM, they didn't force us to.

NOTE: I do see devs who put disclaimer on their posts, actually.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Tivo7:
Great post. Not many people know about chip calibrations. They just figure their battery is dead or dying and need a new one :D
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Grommish:
If the devs knew about the issue to begin with, it wouldn't have been an issue.. Since an issue like this is hardware related, you find out after the fact. There is a procedure for fixing it. Every rom or kernel I've seen includes a 'Your warranty is now void' blurb for a reason. Being a pioneer is hell, just ask the many folks who hard bricked their epic touchs in the first 3 days..
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] sirdancelot:
Well, i would like to know the exact sequence too. My problem is the same as everyone here, i got starburst + pershoot kernel and got miscalculation on the battery.

After reading the posts here in my first attempt i went:

1) discharge by leaving cwm on all night

2) wait 1 hour with tab off, then try to turn on

3) charge all morning with tab off (after 4 hours plugged in, the battery widget was still going up and down, then i unplugged and replugged, the battery widget showed 100%)

4) wait 2 hours (tab off)

5) turn on and see that the battery drain was still there. I was able to use the tab but i got 1% of battery off per minute of use (just using note everything for meetings at the job)

Im currently on my second try "all off"

1) All night discharge

2) 2 hours waiting with tab off

3) 4 hours of charging with tab off

4) currently waiting 1 hour before starting up

I will post the result after that.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
So, how did it go? Did you sort out calibration problem?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
Were you able to turn it on after all night discharge in CWM? Just to be on safe side I would not do it without checking voltage on battery. Because I did not test it if there is a hardware "low voltage limiter" which would prevent any further discharge.

And if there is one then FG chip maybe not able to take the first (low voltage) reading because battery would be cut-off from circuitry in order to prevent deep discharge.

So, basically voltage somewhere in 3.6 - 3.7V is a good start point.

And yes, when battery is totally empty - charge time should be around 6 hours.

Looks like chip did not get it's calibration. I would suggest - don't discharge tablet in CWM till it's totally dead, 3.6/3.7V is enough. Then charge it in one shot, and then unplug it and let it stay for couple of hours.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Evan2ac:
You are kidding with me??? This issue has been known for over 6 weeks now and yet not ONE dev has put up a disclaimer in their forum to warn people. Very poor form.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pkoper:
There are also no disclaimers on traffic lights that you might get run over by a car if you cross the road on red...
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Evan2ac:
Analogy fail. The actual red light IS the disclaimer. The red means DANGER do NOT cross.

On the other hand posting a ROM without a "red light" A.K.A disclaimer means "here take this ROM/Kernel and flash, there are no issues that can ruin your tablet"

You see how the analogy fails....
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] sirdancelot:
Vlad, in the first time i tried i used the adb shell command you posted and got a reading of 3678 (aprox) I dont remember the exact number. The second try I must admit that didnt check the voltage..

The tab is here with me, im waiting a few more minutes before turning it on. If the chip is not calibrated i will try again but checking the voltage before.

Anyway thanks for helping us out, i will try to help posting any findings here.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Grommish:
Ok.. here is your disclaimer.. From the ODIN Flashable CWM post:

If Samsung wanted us to have Root-access, they'd have given it to us by default.

Now then, if you are unhappy with the potential to break, damage, destroy, or in any other way utilize your tablet outside the confines of the sandbox in which Samsung has developed, I invite you to return yourself to stock using one of the threads that outlines it. Please remember to make a backup of your SDCard, ODIN-flash the stock recovery and do a factory reset (which WILL wipe your SDCard.. This is your DIRECTED warning). Then ODIN flash the HC3.01/HC_TWUX3.1 stock image of your choice..

The battery charge/discharge issue is HARDWARE related, as outlined by not only the fix, but the description on how to fix it. It has to do with the charging circuit and the reading of the voltage by the chipset. I had the batt drain issue on the STOCK ROM.. You whining that nobody told you bad things could happen is ludicrious. You are actively changing a closed system (what part of LOCKED bootloader didn't tell you that?). Or the fact that even if you did get one of the few (like myself) whose 10.1 came unlocked retail, the OTA update by Samsung that locked the bootloader may have been a clue.

I am not a dev, but I've sponged not only my phone (Samsung Epic 4G) and this tablet on more than 1 occasion. In some cases, I knew what I did that caused it. In others, it was a complete mystery. In all of those cases, I didn't blame the dev, I fixed the issue and started over. If this is unacceptable for you due to personal reasons (ie: business related uses of the tablet), then I would suggest returning the GTab10.1 and pickign up an iPAD2, which is designed for poeple who want no control over what they can and cannot do with the device they paid for, and want to be hand-held and spoon-fed.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] nakedninja42:
+ 1

I fixed my battery problem by sending it in. I was on stock and had the issue so samsung replaced the battery and i havent had the issue since. Flashed all the roms and kernels since getting it back and I still have a perfect battery.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pkoper:
custom rom is what we are talking about isn't it? As in... not stock? like... not from the manufacturer?

A shame I can't find the thread but Olipro put it nicely a few years back... it was along the line of, yes ****wit, it built in a battery drainage script in the kernel and made sure you're the only **** that downloads that version.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] sirdancelot:
Ok, that procedure didnt work for me

1) Discharge through the night with cwm

2) waiting a few hours plugged off

3) charge for 6 hours

4) waiting a few hours plugged off

When I started now the tab, the battery was 0%

After turning it off I plugged the cable and it showed me a 90-100% charged battery on the widget.

So what now?

---------- Post added at 08:48 PM ---------- Previous post was at 08:18 PM ----------

Ok after last try, I turned the tab on and bingo, seems like the battery is calibrated.

So, vlad was right thanks for the help. For those of you with the problem my advice is be patient and do the steps one by one.

BTW Quadrant is giving 2780 points to my newly recovered tb. Thanks pershoot and the guy from starburst rom. :)
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Grommish:
Edit: Sweet! Glad to see you got it working.

I don't see in the OP where it says to drain your batt via CWM..

Take your charged tab, turn if OFF for an hour or so.. Start it up, and run the crap out of it (I OC'ed to 1400/1400 Performance while watching a movie.. still took me awhile to get the drop to 40%).. Turn it off, let it sit for a long time.. Turn it back on and then charge to full.. Worked without issues for me..

From what I'm understanding in the OP and his other thread, the charge circuit needs to take those TWO seperate readings with enough of a voltage difference for it to reset (hense the Charge-poweroff, drain and poweroff cycles).

@ 1400/1400 Performance OC'ed, I watched all of Transformers 2 and batt only dropped from 81% to 40%.. and this is BEFORE the calibration.. Mine wasn't as bad as some people report, but my over-night "hibernate" mode crushed the batt.. I can't tell you how many times I thought I had Sleep of Death the next morning, only to find the batt completely flat.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
Exactly, two reading of open circuit voltage with 50-60% difference minimum to reset chip.

I've mention about discharge in CWM later in the thread because battery might be "false" drained too fast and you would need reboot tab multiple times in order to discharge it enough.

When tab in CWM mode - kernel does not care about capacity, so it wont shut down tablet like Android would.

Speaking about overnight drainage - this is a different matter. I use Advanced Task Killer and standard Samsung Task Manager to kill everything before going to bed. And I have "Wi-Fi disable when screen off" mode also. Obviously no automatic email pulling or things like that.

So my tab is losing about 1-2% of charge overnight.

Check what you have running on a background.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Grommish:
The overnight issue was solved with the recal. Currently, I'm running pershoot's kernel with stock twux, and the tablet has been suspectible to wifi SOD, so I have it set to never sleep. I lose MAYBE 5% over the night without a ATK (HC doesn't seem to need it).

I get 2 to 2.5 days of moderate use with the cpu set to min/max 2xx/1400 before I toss it on the charger.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
Good, looks like you all set then. I'm too on pershoot kernel but my tab is unstable on 1400 so I went 1200... which is fine.

Btw, with that custom kernel you can monitor current consumption which should give you an idea if fg chip needs calibration.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] sirdancelot:
Hi all. I want to give another report on my drainage problem. After half an hour of use i noticed a big drop in the battery. I assumed the chip still needed calibration and indeed it needed. First i charge it again turned on till 100%. Then i used for some time until it dropped to 60% (took about 35 mins). Then i turned the tab off for three hours. Bateery is now 83% and dropping 1% every 45 seconds. Now i will discharge again till 50% and turn off againfor a few hours to see if the calibration take place.

In case it fails, Can anyone post detailed step by step instructions so i can save my tab? Thanks again.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ResidentJack:
Hi, I'm one of the unlucky ones having a screwed up battery after new kernel and rom. Now back on twux but oc at 1.4 I just have a quick question:

does Wipe Battery Stats in CWM work?

or

Battery Calibration App?

Thanks ;)
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ArtificialSweetener:
You are not unlucky. Flashing a 3rd party ROM/Kernel is the main cause of this battery damage issue. Unfortunately dev here refuse to warn people about it and many are left in your situation. Its very unfortunate and I hope you get your issue resolved.

My question to you is if you knew flashing 3rd part ROM/Kernel would highly likely damage your battery would you do it again? I am asking because I am trying to warn people about this crippling issue as best I can.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ResidentJack:
No I would not have. I found out about this on "galaxytabhacks.com" and I just wrote a message on the post that the guy making the tutorials should really warn people. THIS SUCKS! It is only fair to give some warning as to this type of potential damage. I may now have to pay shipping to return the damn thing and wait to get a new one.

---------- Post added at 09:10 PM ---------- Previous post was at 08:56 PM ----------

It's funny, the guy over at galaxytabhacks also seems reluctant to post any warning about the damage. It feels like they are more interested in getting people to follow their tutorials and download their kernals etc etc then risk people not doing it because they were "given fair waring." I don't think this is right at all. I love modding my devices, but I appreciate it when people tell you what the risks are up front, no BS!
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ArtificialSweetener:
I feel your pain. I totally agree its sad that these known issues are not posted as a warning in threads.

You can try some of the techniques in this thread but it is likely you will have to ship it for repair. I feel your pain. I also had the battery drain issue on my unit when I flashed one of the 3rd party ROMs but I was able to resolve it by quickly reverting to stock ROM from samsung. I think my battery is OK now but it was a close call.

I think MODs need to step in and force a warning or disclaimer of all the issues that 3rd part ROMs/Kernel are creating. This is getting ridiculous and every day someone new is posting about this battery issue after they flash 3rd party ROM/Kernel.

---------- Post added at 09:18 PM ---------- Previous post was at 09:15 PM ----------

I have been saying this from day one also. The Devs REFUSE to warn people because they want their ROM/Kernel to be the most popular. Its like a competition that only hurt the users. Its pathetic IMO.

As I said MODs need to step in and stop this nonsense and provide a clear disclaimer and warning of specific issues like this one in ALL threads that advertise ROMs/Kernels.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Stardate Tab 10.1:
Here is your disclaimer, if you plan on flashing a rom to your tablet and you don't know what your doing, don't flash the rom. Disclaimer #2, if you go on a developers site telling people not to listen to the developers you have lost touch with something called reality. Why are you on this forum?

Sent from xda premium app
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ArtificialSweetener:
Im warning people of the issues because the devs willingly refuse to.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ResidentJack:
Wow, WHY SO ANGRY DUDE?I am far from a beginner or novice and I have been modding my devices for many many years. I don't know how old you are, but I'm old, and have been messing with computers for many years. You need to be a bit more respectful. The only thing one is asking is for detailed "warning" of possible damages and problems with certain roms/kernels. I do not feel this is OUTRAGEOUS. If I had bricked my device I would not be complaining, as I am aware that if I don't follow steps, I can very likely "Brick" my device. But there is no mention anywhere of this potential Battery Damage, and there should be. Period.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ArtificialSweetener:
Exactly! We need to pool together and stop this nonsense going on. Every day someone new comes on here with this battery damage due to flashing 3rd party ROMs/Kernels. We need to somehow request MODs to force the devs to post specific warnings and disclaimers of the issues. This is getting ridiculous how many tablets are getting ruined due to 3rd party ROM/kernel.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Grommish:
Seriously? Its not damaged, you tool. You recalibate and move on. Sweet baby Jesus on a pogo-stick.

Making yourself a tool is just a way to find yourself with an invitation to the world.

I don't understand, if you don't know what you are doing, don't do it. You don't go yanking wires under the hood of your car without knowing what you are doing. I laugh at the people who don't read, don't know, and can't be bothered to do either for themelves. You deserve what you get..
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ArtificialSweetener:
What the heck are you talking about? It takes zero brains to flash a rom or kernel. The problem is in the roms as proven countless time. You have no idea what u what u are talking about. All you're doing is just spewing random babble.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pershoot:
how ironic you should say that.

pot calling the kettle black?
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Stardate Tab 10.1:
If we are just making proposals how about we stop rooting devices altogether. Lets get rid of the developers name in xda developers. Lets add 1000 page disclaimers like all companies have when posting a rom. Plain and simple, if you don't know a developer, don't flash their rom, create your own if you are the most knowledgeable. I'm still waiting for this developer 5th element to develop a black touchwiz taskbar. He also is going to take his tab apart to find hidden treasures. When people just make up stuff it is hard to take them serious. Even if they are right some of the times. Welcome to xda stop developers.

Sent from xda premium app
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Grommish:
The disadvantage of having the most popular device (tab/phone/etc) is the influx of people who buy it who have no business doing this kind of stuff to their device...

Upside is all the accessories and official support. Tab10.1 is almost assured to see ICS drop due to the sales.

They'll either learn, or give up after bricking a few..

OH wait! No one has bricked anything.

To those whining about having to calibrate your batt.. I hear there is a .PIT tag out there you can flash in ODIN to fix it..

Ok, that was mean.. there isn't really, don't do it.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] ArtificialSweetener:
^-- More babble. More and more illogical useless

babble

.

Again, all we ask of the dev is to STOP misleading people and show some respect for peoples devices and post the issues related to their ROMs. These issues stem from missing apps in the market, to battery calibrator damage, to increased force closes, and many more. Is this so difficult? No, but as explained the problem is all the stupid competition between ROMs.

If they still refuse to do so in the future I will make sure these issues are known as I am doing now. I dont understand why some of you are attacking me for pointing out some SERIOUS issues with the ROMs/Kernels. Im the only one PROTECTING people from these issues and you should be ashamed of yourself for attacking me.

---------- Post added at 01:50 AM ---------- Previous post was at 01:46 AM ----------

lol, I totally agree here! and if you dont want this influx of people doing this kind of stuff to their devices you PUT UP A DISCLAIMER of all the issues instead of misleading people how "amazing" and "great" your ROM is just to increase its popularity. Its pathetic IMO.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Grommish:
Actually it doesnt bother me at all.. i enjoy the entertainment to be honest.

People who know will ignore you, which becomes an issue if you actually need help. Deal with your own issues and stop being a Nader. Those who cannot or will not research what the do with their 550-650 buck tablet can suffer for their ignorance. Those that do learn will be recognized and addressed.

Pershoot is one of the most patient kernel devs ive ever met. I swear he is mainlinin 'luudes. His calm responses to people in his thread are near saintly. and you managed to get him posting here.

Tsk tsk
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] pershoot:
You should be ashamed that you have derailed numerous posts in the general/q&a forums, to further your agenda. Quite the opposite of what the very forums you loiter, were intended for.

But, I am extremely pleased that you were able to find an outlet to express your inner voice. I envision high hopes for you.

With that being said, can you please work on maybe one post per day? Definitely enjoying the riveting talk we are having on the merits of development content in a developer driven forum, but my inbox is lighting up like wildfire, and don't want to unsubscribe just yet. I'd like to see far you'll go to further your alterior motives. It's like a soap opera:) We've explored multiple persona/personalities, now i'm ready to see more.

Thanks; appreciate it.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
Stop trashing my thread with your "logical" but still useless babbles.

You know nothing about that matter, your battery damage "danger" exists only in your troll head.
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] Vlad_z:
answers in short:

no

and

no

if you want to know why and what to do read this thread. It is harder now - "thanks" to troll named ArtificalSweetener

[QUOTE=ResidentJack;17886850]Hi, I'm one of the unlucky ones having a screwed up battery after new kernel and rom. Now back on twux but oc at 1.4 I just have a quick question:

does Wipe Battery Stats in CWM work?

or

Battery Calibration App?

Thanks ;)[/QUOTE]
[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] datboycuong:
I'm tired of reading about posters complain about 'OMGWTFBBQSAUCEANDHOTWINGS THIS ROM BROKE/DRAING MY BATTERY!!!'

Why even root your device if you don't know what you are doing after you root it. I am pretty sure if you asked 95% of these people, what you get out of rooting your device, they won't know what they are getting.

It's not an iPhone/iPad, you don't get free apps. If you don't know what rooting your device gives you, other then flashing new roms and kernels, then go get an iPad and quit acting like you know what you are doing.

Also, why would you flash a rom/kernel without reading all the post about the rom from the users who are using the rom? Do you go out to buy a stick shift car and then wonder why it doesn't shift automatically?

OMGWTFBURGERKING NEW ROM LET'S FLASH IT AND EVERYTHING WILL BE WONDERFUL EVEN IF I DIDN'T READ ANY OF THE POST, I ROOTED MY DEVICE BECAUSE IT'S THE COOL THING TO DO AND I CAN TURN MY TABLET INTO AN IPAD.