yashsingh1/xdaforums huggingface dataset:
[Xperia Z General] ahassouna:
Hi all,

I decided to upgrade my C6602 to 4.2.2 stock using flash tool using the TW generic rom (i was using the middle east original stock 4.1) and did no rooting or unlock and the problem occured after 2 days.

I read a way somewhere in the forums here on how to fix it and i tried it and it never happened again for the past week.

Here is what i did :

When phone shut down i reopened and it showed 56% so i let it run down till it was completly depleted and started charging while phone is shut down for 14 hours anf whrn i opened found it still was 97% so i shut down again and let it charge and reopened and so on till it reached 100% then i downloaded the battery calibration app (no root) and calibrated then drained battery till zero again and the phone shut down, left it to recharge till morning and when i opened phone in the morning found it 100% and everuthing was ok since then, even the phone stayed 100% for more than 1 hr while had sync push mail on and some facebook.

Hope it helps anyone
[Xperia Z General] [NUT]:
The problem is that in doing this guide... You risk demolishing your battery... NEVER try this people, I'm serious. :eek:
[Xperia Z General] Vepo:
"If you run your phone while experiencing the bug until you run out of juice, you risk destroying your battery!!"

This is exactly opposite what Sony replied to someone:

http://talk.sonymobile.com/thread/142619
[Xperia Z General] [NUT]:
It's a fact most people assume their phone battery also does but the problem is that the idea is based on an entirely different battery technology... And for the one in our phone running empty can be deadly.

The tech on the battery will not allow it to happen and has a sticky safety built in. If you drop your battery below the safe threshold the safety kicks in and will not allow any more use of the battery.

The problem is that our phone, like many others, uses the battery before the charger. It uses the battery as a jumpstart until the charging hardware and software is initialized... That's why the battery revival described by [MENTION=4200974]NetSkill[/MENTION] in this thread did work... But it requires opening our phone and charging the battery on an external charger.

I am dead serious:

DO NOT FORCE YOUR BATTERY EMPTY WHEN EXPERIENCING THIS BUG!

More info: http://batteryuniversity.com/ in general and http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries in specific Li-Ion (our batteries are this type) terms.
[Xperia Z General] Vepo:
I ran my battery empty just after flashing 4.2.2 (before reading about this bug) and my battery charged normally after that.

Does it mean my battery is okay?
[Xperia Z General] NetSkill:
Yes. Ur battery is okay, i also discharged my phone but the second time i discharged it wont turn on because of this bug! Sony should do hotfix quickly!

Edit: Hey everyone the first time i experienced this bug was on the leaked .407 fw

Odoslané z C6603 cez Tapatalk 2
[Xperia Z General] NetSkill:
Okay i performed clean install of 307 fw just now... I wanted to remove some apps so i rooted my device with doomlord toolkit. And guess what? after rooting and rebboting battery percentage jumped from 21% to 61% so what now?

Odoslané z C6603 cez Tapatalk 2
[Xperia Z General] gm007:
Now charge your phone to 100% and use it.
[Xperia Z General] techpal:
I am having same problem , clean installed 4.2.2 but after rebooting percentage rose from 27 to 56%. So if I charge now how would I know if its actually charged 100%.
[Xperia Z General] [NUT]:
Leave it connected to the charger during the night. That will be enough.
[Xperia Z General] rambg2:
what do you mean? I'll leave it even it reach 100%? is it okay?
[Xperia Z General] [NUT]:
Yes, this way your battery will trickle charge to a true 100% full :)
[Xperia Z General] techpal:
Okay will do that.
[Xperia Z General] vayu:
got it @37%

Will test at different % once I "trickle charge" this puppy to a 100%

Want to know the X factor @ which we can expect this, and if have more posters with results we can get to this number faster

V
[Xperia Z General] sanjazz909:
or maybe it will stop charging at 100%, because the battery thinks that it is full...
[Xperia Z General] [NUT]:
No, in that respect the battery is protected by the same thing that can keep your phone from booting if the battery charge drops below the safe threshold: the phone uses the battery before the charger, this means your battery is in use while it is getting charged... This also prevents overcharging it.

In that respect Sony did it right ;)
[Xperia Z General] viswavj:
I rebooted my mobile when the battery level is 54% by battery reset method(pressing power button + volume up button) but for a surprise it just rebooted like normal without any dropping down or jumping up like before and the battery level after the reboot was 53%....
[Xperia Z General] Skyscraper90:
I have the same problem: My battery was at around 20-30%, then i shutted down, waited a moment and then booted normally (without pressing any other keys): Now i have 55% battery left!

So I think - without rooting - only sony can fix this?
[Xperia Z General] Cookie Ninja:
I faced this a couple of times, first, battery was at 35-40% and I commenced heavy internet use on 3G...in a very short time, battery low level came on first at 15%, then at 5% (ignored both) and Phone shut down due low batt. Second time, battery dropped to 1% while playing games and remained alive for 15 more minutes (continued game) and then shut down. No problems after either auto shutdowns... My phone still works well and battery lasts for a day+ with normal to heavy usage... Yes battery values does jump 20%± after reboot, but I can live with it..

Dead Cookies leave no trails...
[Xperia Z General] Tungstwenty:
Checking the battery state

I did the same experiment everyone is mentioning: hard reset when around 35%, after startup it was at around 50%.

When connected through USB it started charging, and when it reached 100% according to the phone it was still charging. You can check it with:

# cat /sys/class/power_supply/battery/uevent

While it's already on 100%, it still said POWER_SUPPLY_STATUS=Charging and POWER_SUPPY_CHARGE_TYPE=Fast

After a while (I didn't notice how long), the final values were these:

POWER_SUPPLY_NAME=battery
POWER_SUPPLY_STATUS=[COLOR="Red"]Full[/COLOR]
POWER_SUPPLY_CHARGE_TYPE=[COLOR="red"]N/A[/COLOR]
POWER_SUPPLY_HEALTH=Good
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_VOLTAGE_MAX_DESIGN=4200000
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=3200000
POWER_SUPPLY_VOLTAGE_NOW=4167969
POWER_SUPPLY_CAPACITY=100
POWER_SUPPLY_CURRENT_MAX=8133193
POWER_SUPPLY_CURRENT_NOW=1600
POWER_SUPPLY_TEMP=318
POWER_SUPPLY_CHARGE_FULL_DESIGN=2370000
POWER_SUPPLY_CHARGE_FULL=2607000
POWER_SUPPLY_CHARGE_NOW=-13

I don't know if it ever was in Trickle charge or not (the driver sources have that), but the truth is that right now it's still connected through usb to the computer and it reports as Full and not charging. The effect of the bug is therefore reverted (at least until it's triggered once again) and the shown % is now the real one.
[Xperia Z General] DonMuthu:
lets jsut hope sony team knows abt this issue by now
[Xperia Z General] ethan3686:
somehow today on second charge with 4.2.2 the battery seems normal.. went from 100 to 9% and i started charging.. no sudden drop.. weird!
[Xperia Z General] Aresmar:
It also happens sometimes with normal reboot.
[Xperia Z General] [NUT]:
I actually remanded my guidelines, nut the older ones are still in the OP. As was stated by Aresmar and others, a regular reboot also triggers it, most of the time.
[Xperia Z General] Vepo:
Avoid rebooting then?
[Xperia Z General] gm007:
Yes why not if it's not necessary,i stayed 5 days without rebooting the phone,till i decided to try this bug :D
[Xperia Z General] [NUT]:
&

&

Some people still think that by rebooting the phone will speed it up for daily use... But all it does is clear the caches which make it speed up more then a fresh boot will ever do...

On the other hand, we are on xda and people do try mods and fixes and rebooting (to recovery, to flash or/and backup) is also an integral part of the use of the phone, at least for them :p
[Xperia Z General] Tungstwenty:
Does this still happen if once on 4.2.2 you revert to an earlier 4.1 build?

With all the stuff on the thread I don't know if it's true, and indeed it must be something related with a firmware update, or if's "merely" the kernel drivers that have a bug and in theory it might be possible to have custom kernels prevent the issue (provided someone finds the exact problem, of course).

I compared "drivers/power/pm8921-charger-sony.c" from 10.3.A.0.423 with the one from 10.1.A.1.434 (it didn't have the "-sony" suffix then) and there are a couple of differences on the way chip->soc[SOC_SMOOTH] is calculated. This is the value provided over the sysfs interface to be displayed on the screen, I think. And either SOC_SMOOTH or even SOC_TRUE (the real value), might be miscalculated somewhere and one of these is likely to be the value that triggers the safety shutdown.

I don't know much more to be able to know if there's any change of fixing this (for unlocked bootloaders, at least), but anyway here's my contribution for the day :silly:
[Xperia Z General] [NUT]:
From what i have understood from some users, the problem persisted with a downgrade, that's why I suspect a low level firmware update which does not revert when downgrading. But I haven't tested that myself to be honest.
[Xperia Z General] DonMuthu:
i installed the GSam battery monitor and since there i dont see the sudden decrease or increase maybe a temporary solution
[Xperia Z General] baga255:
Surprisingly, after installing this app, Power+VolUp combo didn't affect battery percentage first 3 times. Tried it with 40%, 32%, 24%. But then I tried rebooting with 18% left, and it jumped to 36%. So it's a no-go.
[Xperia Z General] kkd28:
yes i think its a kernel level bug and no apps' gonna fix it.
[Xperia Z General] lonelyindark:
My phone has just faced this problem, it shutdowns due low battery when having this bug i'm charging it now, so my battery is ok? Will anything happened to it? :(
[Xperia Z General] [NUT]:
Well, as long as its charging and still boots, don't worry about it. Just try not to have it happen again.

It's not a given fact your phone will destroy your battery with this bug, but it might. So play it safe and make sure you charge to a solid 100% by leaving it connected for a couple of hours after it reached 100% according to the battery indicator.
[Xperia Z General] lonelyindark:
Ok thank you, i hope sony will fix it quickly :good:
[Xperia Z General] cebrax:
re

Why doesn't Android monitor the battery voltage and shut the phone off when it reaches about 3.25 volts or so? Depending on software for this is nuts.

Because this is what triggers battery protection circuit to shut down the access to battery, the battery voltage going lower than about 3 volts, of course that voltage may change depending on the battery protection circuitry.
[Xperia Z General] Rchard:
This bug is also present in cm 10 nightlies. However, if u don flash or reboot the device when it reaches below 30%, this bug

doesn't come. If it happens in every rom then definitely its a bug in a lower level. I am just wondering, does SONY knows about this? Maybe

we should all contact them.
[Xperia Z General] kkd28:
what about 10.1.1 stable version?
[Xperia Z General] Rchard:
I haven't tested that coz i usually run nightlies. There is no stable version yet for xperia z coz hdmi is not working and other minor bugs. Nightlies are stable enough. But this bug is present on other rom also like pac.
[Xperia Z General] kkd28:
no stable version?

http://download.cyanogenmod.org/?type=stable&device=yuga

check this out.

I believe its a kernel level bug of 4.2.2, and of course custom kernels are based on stock one, so nothing we can do but wait for Sony to fix it.
[Xperia Z General] Rchard:
Well HDMI to my knowledge is not working so you cannot say its fully stable. However, both versions are rock solid, no force closes, reboots etc.. There are sometimes stutters in UI, but other than that its running well. I am wondering whether Sony knows about this?
[Xperia Z General] kkd28:
I know there is someone posted this issue in official sonymobile forum, but have no idea whether Sony learns about it... I intended to flash CM to avoid the battery bug, now there is no necessary to try.:)
[Xperia Z General] Rchard:
Ye. OEMs are always late. For example, CM already patched its version with the major security exploit that was recently identified that

all android phones are affected. If you try the stable release, can you share your results. All I know that after flashing the latest nightly, this bug

appeared again. I would say its a moody bug :)
[Xperia Z General] ckyy:
Jeez that bug is SO ANNOYING. I hope sony fixes this ASAP. But this won't happen anytime soon..
[Xperia Z General] Rchard:
Am guessing that Sony is not aware of this, otherwise they would have already patched this bug. I wonder it will be useful to send an email to gsmarena or phonearena to raise the awareness? Talking to Sony's customer representatives is hopeless coz they don't know anything.
[Xperia Z General] zirado:
Today I updated my monx ROOM with TWRP recovery 2.6.0.0 and didn't have false battery status. But need 2-3 days of testing.
[Xperia Z General] kkd28:
please do report back, thanks:)
[Xperia Z General] Rchard:
My analysis so far. I flashed a new nightly, rebooted and the battery bumped up to 51% :) even though before flashing it was 25%. After the flash, i played with the phone for awhile and then it updated it to 20%. So i guess you can all do this if you think its not showing the right value. Rebooting wont help though, i tried many times.

Not sure if this works on stock sony firmware.
[Xperia Z General] kkd28:
yes it works. the battery level becomes normal after a certain period.
[Xperia Z General] manojpahal:
My battery drains suddenly 30% to shutdown looks alike that this is a local 1000 rs bigscreen phone charging to 100 takes about 3 hours what a tragedy..in on 4.2.2 stock rom .. This bug will really ruins Sony's Xperia z fame...sony should fix it within few hours...otherwise....
[Xperia Z General] vayu:
Somethings that make you go umnhh..

And the comedy continues. My Xperia sat for close to 9 hours at 29% but something was not right. Per the posts here, why reboot if you don't have too and let it drain. Well 9hrs at 29% seems fishy no matter how much I want to believe Sony may have ported some extraterrestrial knowledge to manufacture this sealed in technology. A regular reboot, promptly made it jump to 60% and I decide it was time to hit the power supply

Wonder what would have happened had i let it sit at that 29%...
[Xperia Z General] sanjazz909:
I'm also under the impression, that it doesn't happen with the 2.6.0.0 TWRP
[Xperia Z General] [NUT]:
Seriously, TWRP and CWM both have nothing to do with it, it happens even to phones without recovery...
[Xperia Z General] liliha:
Tip for those who don't want to test if your battery dies completely if you let it run to zero, use automateit to trigger a power off once the battery reaches 10%
[Xperia Z General] kkd28:
plz do more test and do report back, thanks
[Xperia Z General] zirado:
Unfortunately false information is still here.:banghead:
[Xperia Z General] kkd28:
wondering whether zl got this issue...
[Xperia Z General] reptile64:
I had 10%.. rebooted the phone and voila!!! 30%!!! What's going on here??? I'm only rooted without recovery btw!
[Xperia Z General] NetSkill:
No matter if you rooted or installed recovery, 4.2.2 update comes with this bug

Odoslané z C6603 cez Tapatalk 2
[Xperia Z General] dbolivar:
CM10.1

Can anyone confirm whether this bug also happens with latest CM10.1 nightly (or stable)? It happened to me once with CM10.1, but it was after it happened with the stock 4.2.2 ROM (just flashed CM10.1 after that, and the battery continued crazy). I don't know if it was because of this particular scenario, or it's also present on CM10.1.
[Xperia Z General] kkd28:
cm10.1 isnt free from the bug.:mad:
[Xperia Z General] Alcatrazx:
After call

I noticed that the number fluctuated after a voice call. It was at 41% and went down to 19%. Upon restarting mobile I got the previous value again.... I noticed also that by turning off LTE, this problem vanished in subsequent calls. But then again this might be a coincidence.
[Xperia Z General] whitefang3456:
Negative. No battery bug seen in my Belgium FW 4.2.2. I have screenshots if possible. And i do tested few times about battery numbers some of you proposed. Cheers and goodluck

Whitefang

If this info helpful, give a thanks ;)
[Xperia Z General] Futura2000:
It doesn't matter which region your on you well get the bug at somepoint as its a bug in the source code somewhere.
[Xperia Z General] anthcho:
I had this issue when I had my XZ rebooted. battery level was 13% before reboot, jumped to 68% after reboot.

I have battery monitor widget installed so I can tell home much the phone is charging the battery from the history log file.

What I see is the phone keeps charging the battery after 100%. and stopped when I can't charge any more.
[Xperia Z General] Regionella:
I have same problem. when will we get an update for this crap?

SONY HEAR US!
[Xperia Z General] Ambroos:
It's just a bug in the battery estimation algorithm. It doesn't affect how long your battery actually lasts and corrects itself while your battery drains/charges.
[Xperia Z General] ckyy:
Nope. It does NOT correct it self.

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[Xperia Z General] kkd28:
it corrects when you fully charge your phone.
[Xperia Z General] AntonyStark:
I don't think that it is a problem for anyone if they are charging their phone, but it is when their phone says it has 20% and then just powers down!!!
[Xperia Z General] kkd28:
yes, this kills battery.
[Xperia Z General] NetSkill:
I experienced this myself and it was really hard to glue back cover back in to be waterproof again

Odoslané z C6603 cez Tapatalk 2
[Xperia Z General] pjgowtham:
Such a open bug..Sony is tryin to do placebo test in us
[Xperia Z General] coolboyzzzz:
So, it really is the problem for all 4.2.2 ROMS?
[Xperia Z General] deadlyheart4u:
I am on 4.2.2 my battery is pretty decent i am using 4G connectivity and it last me 9 hours a day with 50 calls and 150 messages.
[Xperia Z General] gm007:
Congratulations, reboot your phone when you have 20-25% and come cry here.
[Xperia Z General] [NUT]:
:rolleyes:

Not so negative :p
[Xperia Z General] sebastianlow:
I'm currently having this problem with CarbonRom :(

How can I prevent myself from destroying my battery?

Should I let my phone run to 35%, restart and get back my 50+% and then let it drain to 0

Or should drain my battery to 0% without restarting?
[Xperia Z General] dbolivar:
From what I have learned from this thread, I would suggest the following:

1. Never ever let the battery drain until the phone turns off, it may kill the battery.

2. Never reboot the phone when battery is around 20-25% as it causes the bug.

3. One approach would be to charge the phone when the battery gets in this range, without rebooting. This way the bug shouldn't happen and you don't risk ruining your battery.

4. If the bug has happened, charge the phone a couple of hours more after 100%, as this way you let the battery reach a true 100%, normalizing the measurement.
[Xperia Z General] sebastianlow:
So is the bug reporting less or more battery percentage than what it is?
[Xperia Z General] Vepo:
It's showing more than actual percentage after reboot at certain percentage
[Xperia Z General] sebastianlow:
Actually I think that the bug is actually displaying less juice than what the battery is holding. Restarting the phone almost doubles my usable battery life.
[Xperia Z General] gm007:
So you wont need charger anymore :p
[Xperia Z General] boyq:
From what i have experienced, it's displaying more than the actual %.

-sent from that phone below
[Xperia Z General] adielee:
From what I read in this thread this is nothing to be happy about.

Normally when Android shows 0% battery there is a safe amount of juice left in the battery as the software prevents the battery from completely depleting.

If you use up the battery with the bug, I believe it completely drains the battery meaning that when you plug your phone into the charger the phone will not charge because it needs to turn on first before doing so (the way it works on the Z), meaning you'll need to get the battery replaced.

Just from what I read before on this forum.

Better to do a full charge asap. The bug will fix itself up after some activity.
[Xperia Z General] ckyy:
This actually.

If you restart at 20~%, you'll have 50~% back. However, your phone will die at 20~% if you restart.
[Galaxy Tab 2 Q&A, Help & Troubleshooting] BADDINOROX99:
does anyone know how to uninstall CWM and install TWR?
[Galaxy Tab 2 Q&A, Help & Troubleshooting] zeetherocker:
You just have to flash the TWRP zip file through your current CWM and thats it.. reboot recovery and you'll have TWRP...:cowboy:
[AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin] Obartuckc:
Just wondering, with the newer, international ROMs, what the "Increased Legibility" actually does/adds/changes, compared to the MDL versions. Thanks!

Sent from my AT&T Samsung Galaxy S4 Badass
[AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin] King Ding-a-ling:
It means the fonts from 4.3, which have been refined, have been pulled and incorporated into those ROMs
[AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin] CallMeAria:
I believe it just sharpens the fonts. They're not pulled from 4.3 however as this feature was incorporated by Samsung prior to any GE leaks (not to mention there are no extra fonts in the firmwares including the new feature). I couldnt notice any difference in regular use but when you zoom in quite a bit its pretty noticeable.

Hes refering to the actual Samsung feature ' Increase Legibility' under display settings that was part of the firmware upgrades like mea, mf4, & mf8. Not custom roms that are pulling the new 4.3 roboto fonts.
[AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin] Obartuckc:
That's what I was looking to find out. Thank you, sir!

Sent from my AT&T Samsung Galaxy S4 Badass
[AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin] King Ding-a-ling:
Slim will be, and possibly others have.
[MDA II, XDA II, 2060 ROM Development] ACATTAN:
Hi guys,

Could someone tell me what the latest ROM version for a QTEK 2020 (i.e. XDA II) is nowadays? I don't mind using an O2 or i-mate version, and I'm not looking for a hack with Windows Mobile SE or something - just the latest official/stable(?) version. And of course where can I download it from.

I currently have 1.72.00WWE which I've upgraded quite a while ago (actually it's dated to be a year old), and is quite buggy...

Thanks,

Ariel
[MDA II, XDA II, 2060 ROM Development] Looking Glass:
research the forum

You have it!

If you read a bit on the forum, all the answers are there.

Qtek is probably one of the worst supporters of their devices, everything else has to be tweaked somehow, so it's up to you.

There are NOT 2.XX oficial release for the Qtek 2020, so I would reccommend you to give a chance to some of the ROMs in the forum...

You have my choice in my signature, but every choice has it's own set of problems/limitations.

:wink:
[General Topics] renegaderon:
Well I got my Galaxy Tab 3 today at Wallmart, now if I can figure out how to root it.
[General Topics] _dannyboy:
Galaxy tab 3???? O.o I thought they didn't come out until the 7th
[General Topics] renegaderon:
Thier not supposed to but my local Walmart had about 5 of them out for sale so I bought one.
[General Topics] renegaderon:
Now if I could get this thing rooted all would be well.
[General Topics] Felosis:
Nice, didn't know they released that yet...
[General Topics] tthoma:
Which version? 7/8/10? The hw differs. I'm waiting on the UPS man to deliver my 8.0 one today.
[General Topics] aircooledbusses:
keep us posted.
[General Topics] beanboy89:
My local Walmart has the 8" version of the Tab 3 for sale.