I have an ASUS ZenFone Max Pro (X00T/X00TD)
It is/was discharged and powered off. When i plug it in for charging, it is cycling in start of chaging:
1. vibration
2. the icon of empty battery
3. The bootloader is unlocked... text
4. the icon of empty battery
5. empty screen
1. and then starts again from vibration
I tried to clean the phone's connector, even wiped and stracthed the connector a littlebit, and changed cable, charging source. (One cable is in the 1A charger, another cable is connected to PC.) It doesn't get better.
I tried to leave it in the cycling, i hoped it gets some power.
Does the phone charge always when connected to power, or it just start the charging process after it shows the charging animation (which i don't reach)?
I tried to step in Fastboot mode. It stays in this mode, no cycling.
Does the phone charge in fastboot mode?
I tried to step in Recovery mode.
1. vibration
2. powered by android
3. The bootloader is unlocked... text
4. powered by android
5. empty screen and turns off
In fastboot mode i tried to flash stock recovery, and also TWRP recovery. The flashing process works, but i still cannot get in recovery mode, to see something more, maybe about battery or i dont know.
Of course the phone does not turn on. The same as when i try to get in recovery mode.
1. vibration
2. powered by android
3. The bootloader is unlocked... text
4. powered by android
5. empty screen and turns off
I did not do anything special nowadays with the phone. Bootloader unlock and rooting was years ago, nor i did upgrade, so nothing special. I just used the phone, it discharged, and i'm in this state.
What can i do? Is it something with charging, or it has enough power after connected in fastboot mode, but the problem is something with the software?
Please help.
Was it discharged until it turned off or left more then a few weeks in a very low charge state?
Auto shutoff is about 5-6% of battery capacity.
If allowed to sit until it self discharges below 1% the battery's microprocessor will permanently disable the output to prevent a possible runaway thermal event from charging a depolarized LI cell(s).
blackhawk said:
Was it discharged until it turned off or left more then a few weeks in a very low charge state?
Click to expand...
Click to collapse
It discharged today morning, turned off (or maybe i turned it off, i don't remember), and about one hour later i tried to charge.
blackhawk said:
If allowed to sit until it self discharges below 1% the battery's microprocessor will permanently disable the output to prevent a possible runaway thermal event from charging a depolarized LI cell(s).
Click to expand...
Click to collapse
Does it mean really permanently, without any possibility of get it back?
One more thing: maybe i "pressed" the buttons randomly in my pocket. Is it possible that in an unlucky situation i got into the recovery mode and pressed something away in recovery menu?
Even if discharge to the 6% cutoff you have at least a few weeks in cool temps until permanent auto shutdown.
It is permanent. If disassembled you could bypass the controller and attempt to charge.
Once the cell voltage reaches the controller threshold (if it takes a charge) it would function as before. Generally this is impractical to do.
If the cell has completely dipolarize it may not charge and will simply overheat with a potential thermal runaway if not manually disconnected.
Inspect port for debris, clean if needed.
Try a -known- good charger/wall socket and cable.
Normally phones will take a charge regardless of their power on/off state.
Otherwise the port, battery or the internal phone power control circuit may have failed.
A cable, charger, port failure are the most common causes though.
Best to use a 3 foot long cable; longer ones can cause charging issues.
blackhawk said:
Even if discharge to the 6% cutoff you have at least a few weeks in cool temps until permanent auto shutdown.
It is permanent.
Click to expand...
Click to collapse
It was definitely not a few weeks.
blackhawk said:
Inspect port for debris, clean if needed.
Click to expand...
Click to collapse
Sure, this was the first thing i checked. I also tried to carefully scratch off the possible oxid/dirt layer with a paper clip's end.
blackhawk said:
Normally phones will take a charge regardless of their power on/off state.
Otherwise the port, battery or the internal phone power control circuit may have failed.
A cable, charger, port failure are the most common causes though.
Best to use a 3 foot long cable; longer ones can cause charging issues.
Click to expand...
Click to collapse
So should i try to leave it in the cycle? Or better leave it in the fastboot state?
Hm. But i tried to charge in fastboot state for a few hours.
I don't understand.
blackhawk said:
Otherwise the port, battery or the internal phone power control circuit may have failed.
Click to expand...
Click to collapse
Yesterday with a third charger everything was fine. And this charger was fine, last time i used it two weeks ago. I tried to charge in my car now - the same cycling of starting to charge.
Okay, so i keep trying to charge, if you don't have better ideas.
But why does not it go into recovery mode? Maybe i could inspect the things more in recovery mode.
Thank you very much for your detailed answers.
If the battery is nearly fully discharged ie >5-6% and not recieving enough current or voltage from the cable, it will not power up even to its boot menu.
blackhawk said:
If the battery is nearly fully discharged ie >5-6% and not recieving enough current or voltage from the cable, it will not power up even to its boot menu.
Click to expand...
Click to collapse
But it should start to charge without cycling, and show the charging animation, right?
Edit #1: Ah, you mean, IF enough current. And if three different charger and cable was not enough for it, then probably the connector damaged. But i don't know how and why.
Edit #2: No, you mean this for booting up. But charging should start normally without the cycling.
trob83 said:
But it should start to charge without cycling, and show the charging animation, right?
Edit #1: Ah, you mean, IF enough current. And if three different charger and cable was not enough for it, then probably the connector damaged. But i don't know how and why.
Edit #2: No, you mean this for booting up. But charging should start normally without the cycling.
Click to expand...
Click to collapse
Your first concern is getting the battery to at least 60%
That's why you use a known good wall socket, cable and charger; a process of elimination.
I've had 2 bad power cables in a row before; more bad cables, etc. doesn't help.
For the boot issues someone here will hopefully recognize your problem if it persists.
blackhawk said:
I've had 2 bad power cables in a row before; more bad cables, etc. doesn't help.
Click to expand...
Click to collapse
Yes, i threw out a bad cable last week. But these 3 cables were good, there is not a big chance that all of them get wrong suddenly and at the same time, i think. I would be happy, because this would be the most easy solution for my problem.
In fastboot the red/green LED is dark, even if the cable is plugged in. Is this LED controlled directly also by the charging controller? Or does not the dark LED show anything, because it controlled by software, what does not run now, while the charging still work?
Or maybe both of charging start cycling and fastboot are use power of battery, while they don't charging it, so power is only getting lower? (Although you said the opposite, as phone is charging, not matter of the power state.)
Could be a bad batch if all are the same brand.
That's why you use a >known< good cable etc.
Don't have that phone so can't say how it behaves.
If it's below 5% power it won't do anything except maybe try to boot maybe not even that. Plus each attempt drains the battery more towards that critical 1% auto disable in the Li pack.
Killing the battery won't help your cause...
blackhawk said:
That's why you use a >known< good cable etc.
Click to expand...
Click to collapse
Okay, i try.
Thank you very much for your help.
Is it possible to turn off the charging screen, charging vibration, screen turning on from fastboot mode? Maybe flash something on or similar?
Because then it won't use the slowly chagring power.
So the screen is active abnormally when it's charging?
Is it stuck in a boot loop?
I know zero about rooting and firmware flashing.
Eventually someone here with that knowledge will step up... be patient.
blackhawk said:
So the screen is active abnormally when it's charging?
Is it stuck in a boot loop?
Click to expand...
Click to collapse
1. I plug the cable in.
2. It recognize there is power, so vibrates a littlebit, then starts to charge OR starts to start to charge - it would be in important thing to know which.
3. It shows the big battery icon at the center of the screen.
4. It notices its boot loader is unlocked, so it warns me - i can pause the phone for one minute in this step.
5. It shows the big battery icon at the center of the screen for a second.
6. But i think it feels its battery is too low, so it turns itself off, even from the charging process.
2. Then it feels the power again, so the cycle starts again and again...
In step 2., if i would know it is already charging itself, then i played with it, i pause every time for a minute, and everytime the battery gets a little more power. Because every vibrate and starting charging take a littlebit power from the battery i think.
So, for example, in every unpaused charge cycle (about 10 seconds) it gets 5 mAh, but uses 7mAh from the battery, then it get worse and worse. But if i pause it for a minute, it gets 30mAh, uses 7mAh, then every minute it gets 23mAh more, so this game eventually worths.
But, if in step 2. it does not start to charge itself, just later, after the "unlocked" text, then playing with this does not help, worse, take the battery lower and lower.
But: if i could disable the charging screen and the vibration, then it won't use the power just for showing to me it charges. And maybe the screen is the one who use the power and makes the controller feel low power from battery/cable.
Or, maybe, charging is already disabled, so no matter what i do, it does not help, and the only solution is to take apart and charge the battery directly.
I just put
blackhawk said:
Eventually someone here with that knowledge will step up... be patient.
Click to expand...
Click to collapse
Okay i try to be patient.
Good news!
This gets the voltage of the battery:
Code:
fastboot getvar battery-voltage
It says it's 4,32 V. If i remember right, this is around a fully charged battery. So probably it charged up when i left in Fastboot state for some hours. And the cycle/loop meant not that it cannot charge, but rather it does not need to charge.
Bad news!
Then what the heck is with my phone?
Summary:
1. My phone is fully charged.
2. It does not boot into normal.
3. It does not boot into recovery, nor by hardware keys, nor by command from fastboot. I tried to flash TWRP, RedWolf and the original recovery too.
4. Fastboot mode works normally.
Believe it or not...
The solution was very stupid.
I cleaned the phone inside, especially the bottom part. Around the connectors, lot of dirt and drying moisture got in. Just enough for - probably - some short circuit.
I don't know why was it okay for fastboot mode, and not okay for recovery and normal boot.
Blackhawk, Thank you soooooo much for your help and your time. I learned a lot from you now.
Excellent.
Guess it was getting mixed signals...
Related
(Bare with me, this IS wm6 related)
Okay, so i got this qtek 9090 from a trade online, and the owner pointed out that he had used it for some time now and it worked without problems.
However that seems not to be my experience. At first I was a little worried that it did not came with a charger.. Only a USB cable. No worries i thought, I will just charge it through USB. Now I have had some experiences where phones wouldn't charge from some of my computers, apparently because of some boards that put out lower amps than others. However I knew atleast one computer should have no problem charge ordinary cell phones.
So i plugged it in, and to my worries the battery kept going down... Untill the phone was dried from power and everything got lost again.. and again.. and again.. It seemed a little odd that it apparently deleted everything each time, since the backup battery indicated 100%.
So at last it went into flightmode and I shut it down with the powerbutton and let it be connected.. The first many hours nothing happened.. But suddenly, when i did an occasional check, it said 3% battery. I went to sleep and the next morning it was fully charged. I used it all day in school and it held its power real fine.
Now I got the feeling that this probably was caused by the low amp output from the computer, making it unable of charging to the extend where the phone would still be able of running whilst charging. So i figured i would order a 220v (the powercurrent here in Denmark) -> 5v USB that outputs 700mA, to make a quicker charge.
Well, to day I was gonna receive that adapter, and since I'd read that the wm6 apparently draines the battery some bit, I waited untill today to upgrade to wm6.
I upgraded and everything truely runs quick and stable. But when i recieved the adapter and plugged it in, i was horrified. The power kept going down, as I had experienced when it was plugged into USB.
Now my girlfriend really wanted to play bejeweled on this thing, so she did and then shortly afterwards we took a few hours nap. I had her plug it in the new adapter to charge it. When i woke up i saw the screen blinking.
I could se it was rebooting over and over again, as it had done the first time it completely lost power..
Now besides that extremely annoying charging problem, I now had another concern....
The boot screen shows NONE next to the R and the G.
Next to the D is the wm version displayed.
Any help would be greatly appreciated.
red LED?
Hm.. By doing a hard reset it shows numbers next to R and G again.
It continuely reboots, display boot screen, shuts down, LED is red, reboots, displays boot screen, shuts down, LED is red again and again.
If i hard reset it some times it will at one point stay off, but the LED still lights red.
And now I question wether 700mA is even enough for charging the BA?
1. Higher power given by power supply does not mean, you will get faster charging
2. If you use WM5/WM6 and have Bluetooth turned on, device turns on every few minutes (bug/feature of the driver needed to keep Bluetooth running: look for BigMike's fix for more information). If your deivce is set up to turn off after long time (for ex. 5 mins), battery might drain out in half a day.
3. Check power settings (delays for device power down etc.)
4. In WM6 be sure, that audio manager is not running (prevents device from deep sleep, allows only screen shutdown)
5. If battery shows up 100% and after disconnecting device discharges in less than 2h being turned on all the time (wifi, bt, phone, screen all the time turned on) it means, that battery might be worn. Consider exchange.
R and G showing NONE is normal in WM5/WM6 because of bug (unfixable for now) in the device and it's incomatibility with this OS: after turning on from power down (taking battery out or total discharging) make soft reset just when R NONE G NONE shows up on the screen. Everything will be normal.
jakubd said:
1. Higher power given by power supply does not mean, you will get faster charging
2. If you use WM5/WM6 and have Bluetooth turned on, device turns on every few minutes (bug/feature of the driver needed to keep Bluetooth running: look for BigMike's fix for more information). If your deivce is set up to turn off after long time (for ex. 5 mins), battery might drain out in half a day.
3. Check power settings (delays for device power down etc.)
4. In WM6 be sure, that audio manager is not running (prevents device from deep sleep, allows only screen shutdown)
5. If battery shows up 100% and after disconnecting device discharges in less than 2h being turned on all the time (wifi, bt, phone, screen all the time turned on) it means, that battery might be worn. Consider exchange.
R and G showing NONE is normal in WM5/WM6 because of bug (unfixable for now) in the device and it's incomatibility with this OS: after turning on from power down (taking battery out or total discharging) make soft reset just when R NONE G NONE shows up on the screen. Everything will be normal.
Click to expand...
Click to collapse
AFAIK the lower the mA output, the slower the charge period.
I have had wifi, bluetooth, beam off. I've set shutdown to 2 minutes. I've set it to low brightness and etc.
As i mentioned it had no problems going a whole day of usage in school.
Didn't know about the bug in wm6 that makes only the screen shut off, but at the momemt i can't even boot the device, apparently because it has no batterypower. And having it connected to the charger makes no real difference (other than it will display the bootscreen and perhaps even the Windows Mobile welcome screen thing, for a few seconds.. then go dead again.)
I've had it in the charger for about an hour or two, still not enough power to boot it up.
It feels like it's just not charging sometimes.. And other times it will charge just fine.
Found out about the reset to solve the NONE issue, but i still don't know what it means that its LED is red all the time?
Even 500mA is enough for sure, as charging from USB works fine.
Device will shut down soon after turning on if there is not enough power in battery, even it if is charging. Leave it charging (amber led on the right) for some time. RED led means low battery and no charging (AFAIR).
jakubd said:
Even 500mA is enough for sure, as charging from USB works fine.
Device will shut down soon after turning on if there is not enough power in battery, even it if is charging. Leave it charging (amber led on the right) for some time. RED led means low battery and no charging (AFAIR).
Click to expand...
Click to collapse
Hmm, i see. I just don't understand why it's not charging then :/
trylleklovn said:
Didn't know about the bug in wm6 that makes only the screen shut off
Click to expand...
Click to collapse
This is not a bug - thanks to this you can still listen to your music keeping device with screen turned off, when you don't need it to spare battery.
trylleklovn said:
Found out about the reset to solve the NONE issue, but i still don't know what it means that its LED is red all the time?
Click to expand...
Click to collapse
Red LED (right one) means low battery, no charging. To charge this led must be amber. Details - you must look for manual.
jakubd said:
This is not a bug - thanks to this you can still listen to your music keeping device with screen turned off, when you don't need it to spare battery.
Red LED (right one) means low battery, no charging. To charge this led must be amber. Details - you must look for manual.
Click to expand...
Click to collapse
Okay.
It's odd still. When i connect the charger the right LED starts to light red.
If it means that its not charging, there must be something wrong, since it only happens when connecting the charger..
it can be amber or red. Those are different colors and meaning.
You can confirm it charges touching the battery - it becomes slightly warm after some time.
jakubd said:
it can be amber or red. Those are different colors and meaning.
You can confirm it charges touching the battery - it becomes slightly warm after some time.
Click to expand...
Click to collapse
I KNOW that, but it is not going amber. It stays red all the time.
Found this thread that discusses a similar problem; http://forum.xda-developers.com/archive/index.php/t-233782.html
Apparently it shows RED light all the time if the battery is dead.. However i hardly doubt that the battery, which could power the phone just fine for and entire day, should be dead.
However, one suggestion in the thread was to take out the battery for some time and then try again. So I will do that for now.
Behavior has changed a bit now..
The LED is still red when i connect the charger. However, if i try to turn it on following happens:
Boot Screen shows for a couple of seconds...
Windows Mobile startup screen appears and the LED changes to orange/amber..
After a few seconds the screen turns black and the LED changes to red again...
And then after a few more seconds the boot screen appears again and everything is repeated, over and over.
If I disconnect the charger the boot screen appears, the wm startup screen appears, this time with a flashing red LED.. shortly after the phone turns off.
trylleklovn said:
Behavior has changed a bit now..
The LED is still red when i connect the charger. However, if i try to turn it on following happens:
Boot Screen shows for a couple of seconds...
Windows Mobile startup screen appears and the LED changes to orange/amber..
After a few seconds the screen turns black and the LED changes to red again...
And then after a few more seconds the boot screen appears again and everything is repeated, over and over.
If I disconnect the charger the boot screen appears, the wm startup screen appears, this time with a flashing red LED.. shortly after the phone turns off.
Click to expand...
Click to collapse
I've seen this problem before. The charger is not putting out enough power to both charge and boot the BA. So what happens is that it starts charging enough to start boot, but as soon as it has enough power to start the boot, it immediately drains it by starting to boot with screen at full brightness.
What I do in this case is to try to catch it just as it starts to boot and turn the backlight off by holding down the power button for 5 sec. This turns off the backlight so there is less drain and the thing can boot up and start charging.
All in all, its a pretty stupid bug but what the hell, there is a solution to it.
Good luck.
motisu said:
I've seen this problem before. The charger is not putting out enough power to both charge and boot the BA. So what happens is that it starts charging enough to start boot, but as soon as it has enough power to start the boot, it immediately drains it by starting to boot with screen at full brightness.
What I do in this case is to try to catch it just as it starts to boot and turn the backlight off by holding down the power button for 5 sec. This turns off the backlight so there is less drain and the thing can boot up and start charging.
All in all, its a pretty stupid bug but what the hell, there is a solution to it.
Good luck.
Click to expand...
Click to collapse
This seems to work atm. (just a few seconds since it successfully booted)..
Does this mean that the device really cant charge if its not "on" ?
(I can see its booted and the LED is now orange. If only it will stay this way untill it has been recharged further ))
trylleklovn said:
This seems to work atm. (just a few seconds since it successfully booted)..
Does this mean that the device really cant charge if its not "on" ?
(I can see its booted and the LED is now orange. If only it will stay this way untill it has been recharged further ))
Click to expand...
Click to collapse
It can charge when it is off. BUT... When its off, its not really off... It has to finish booting and then you can turn it off. Then it will charge faster as it only has minimum drain on the battery. As I said before, its a stupid design.
motisu said:
It can charge when it is off. BUT... When its off, its not really off... It has to finish booting and then you can turn it off. Then it will charge faster as it only has minimum drain on the battery. As I said before, its a stupid design.
Click to expand...
Click to collapse
Well we can certainly agree on that
So does the phone also basicly use to much power to be used and charged at the same time? Which would explain why it seemed to lose power even though it was connected to the charger.
Although it still doesn't add up for me, as at one point i was playing a game on it, while charging and then it charged real fast, where you would expect it to use more power
Oh well, if only it keeps charging now i'll be glad
trylleklovn said:
Well we can certainly agree on that
So does the phone also basicly use to much power to be used and charged at the same time? Which would explain why it seemed to lose power even though it was connected to the charger.
Although it still doesn't add up for me, as at one point i was playing a game on it, while charging and then it charged real fast, where you would expect it to use more power
Oh well, if only it keeps charging now i'll be glad
Click to expand...
Click to collapse
I have found that if you only use the USB cable to charge, it takes much longer (if at all) to charge if it is on. Thats why I bought cradles that have external power suppies as well as the USB sync cable. With this configuration, it gets to full charge in about 90 minutes.
Hm.. yeah.. I let it charge for some time, until it shut down and the LED changed to red again.. The same thing has happened about 3 times now.. If I try to navigate it with the brightness off it will shut down after a few clicks..
Seems like either the battery is completely dead or it's simply not charging.. :/
Think i have to buy a new battery and a cradle, although i didn't really want to spend money on this phone as i got it virtually for free (through a trade of a w810i)
trylleklovn said:
Hm.. yeah.. I let it charge for some time, until it shut down and the LED changed to red again.. The same thing has happened about 3 times now.. If I try to navigate it with the brightness off it will shut down after a few clicks..
Seems like either the battery is completely dead or it's simply not charging.. :/
Think i have to buy a new battery and a cradle, although i didn't really want to spend money on this phone as i got it virtually for free (through a trade of a w810i)
Click to expand...
Click to collapse
Get it to orange and then push the power button (short push) to turn it off (not long push which only turns off the backlight). Then let it charge for an hour or 2 (or even all night). By then, it should work OK.
motisu said:
Get it to orange and then push the power button (short push) to turn it off (not long push which only turns off the backlight). Then let it charge for an hour or 2 (or even all night). By then, it should work OK.
Click to expand...
Click to collapse
Yeah, i tried that. As soon as i press the power button it goes to red again.
Update..
A litte update (i might as well document everything I find out here, if anyone should run into a similar problem).
Now, I've had the device connected to the charge for some time now.
What happens is that the device boots up, automaticly dimms down to no light (since i once had hold down the power button, to dimm down light).
Then it boots up, and i can see everything running.
I can navigate to the battery status menu, which shows
Battery: 0% (charging)
Backup battery: 25%
After a few minutes the device shuts down, and the LED goes red again. But after about a half a minute it will try to boot up again, and it goes through everything again.
What I've noticed is that the backup battery slowly increases, and while im writing it has gone all the way to 75%. The good thing about this completely automatic procedure is that it apparently slowly charges, at least, the backup battery.
My theory is that the backup battery has first priority in the system, so that the regular battery wont charge untill the backup battery is up. And since the backup battery can't apparently be used for actualy powering the system, the system will continuesly reboot because of lack of power, theoreticly untill the backup battery reaches 100% and it starts to charge the regular battery.
The whole problem seems to be cause by some charging malfunction, so that both batteries has been completely discharged. I hope that by letting it continue to reboot, charge, reboot, charge, etc. it will revive the battery.
I will return with more info tomorrow.
Any suggestions are still greatly appreciated.
Hello to you all,
My new XDA Exec has developed a fault. It works OK when plugged in to the USB on my laptop or charger but when running on battery will only do so for a short time. In fact a matter of a few minutes.
The battery indicator shows the battery at 100% when charged but the phone turns off variously at 95 - 98%. I tried a soft reset and not change.
I tried discharging the battery using small lamp then recharging in the phone. The battery indicator did show a lower %age 80 ish but not as low as I would have thought. Subsequent charging made no difference and the problem persists. Has anyone seen this before? Any bright suggestions?
Many thanks to you all for you time.
Cheers
Piran
Piran Bassett said:
Hello to you all,
My new XDA Exec has developed a fault. It works OK when plugged in to the USB on my laptop or charger but when running on battery will only do so for a short time. In fact a matter of a few minutes.
The battery indicator shows the battery at 100% when charged but the phone turns off variously at 95 - 98%. I tried a soft reset and not change.
I tried discharging the battery using small lamp then recharging in the phone. The battery indicator did show a lower %age 80 ish but not as low as I would have thought. Subsequent charging made no difference and the problem persists. Has anyone seen this before? Any bright suggestions?
Many thanks to you all for you time.
Cheers
Piran
Click to expand...
Click to collapse
You battery is dead therefore you would need to change. You are not unique with this problem. That is common issue for Universal (exec) batteries. For your new battery: dont charge with the USB cable and charge when is completely drained.
Hi Bulldog,
thanks for the reply and the info. Regarding charging the unit from the USB port. Does the unit not begin charging as soon as it's plugged in to a USB port? Is there a way to prevent this that you know of? My phone was normally charged for about half it's life from the charger, half from USB.
From what I understand the LI ion batteries don't have a charge memory due to milisecond pulse charging so pardon me for asking but what does the total discharge do for the battery? Obviously it does something but what? (Not doubting you but I'm curious). Is there a away to ressurect a defective battery such as the one I have currently or is it a lost cause. I know some batteries can improve with either heating or cooling by about 20 - 40°C from normal operating temeprature, have you any experience with this?
Do you know if some makes of batteries are better than others?
Please pardon the inquisition but as I spend a lot of time in remote areas it's often quite handy to be able to bodge rig stuff in order to effect a temporary fix and it seems any bits of knowledge help!
Once again many thanks
Piran
Piran Bassett said:
Hi Bulldog,
thanks for the reply and the info. Regarding charging the unit from the USB port. Does the unit not begin charging as soon as it's plugged in to a USB port? Is there a way to prevent this that you know of? My phone was normally charged for about half it's life from the charger, half from USB.
From what I understand the LI ion batteries don't have a charge memory due to milisecond pulse charging so pardon me for asking but what does the total discharge do for the battery? Obviously it does something but what? (Not doubting you but I'm curious). Is there a away to ressurect a defective battery such as the one I have currently or is it a lost cause. I know some batteries can improve with either heating or cooling by about 20 - 40°C from normal operating temeprature, have you any experience with this?
Do you know if some makes of batteries are better than others?
Please pardon the inquisition but as I spend a lot of time in remote areas it's often quite handy to be able to bodge rig stuff in order to effect a temporary fix and it seems any bits of knowledge help!
Once again many thanks
Piran
Click to expand...
Click to collapse
Hi, I have the exact same problem...works fine when usb or mains connected but only for a few minutes when on the battery. Usually when I give it some heavy task stuff it will suddenly just blank out the acreen and die.
I'm going to try and do what's suggested on the wiki page about masking off the charge indicator contact with tape - run the thing down and charge up again.
otherwise it's a new battery - not expensive - and plenty about on ebay.
fanger
Hi Piran,
Be Frank I am not battery specialist. Therefore I cant give a deep explanation what makes the Universal Battery having so many problems with USB charging. For my understanding it is the slow charge which leads to Battery overheat. Therefore All the post here regarding the Battery problems suggest not keeping the universal charged with USB. Just search for Post for "battery problems" and you will find few "explanations"
In Regards whether you could reverse your battery issue. From my previous experience I would say the max the you can get back is some 10-15%. However in your case the issue seams more severe as you device turns off by 90-100% therefore I think you would need to order new Battery.
following procedure I follow to drain my battery:
1) Turn off You Phone Radio (important)
2) disable the "Turn off Backlight" and put your device brightness to "full"
3) let your device drain the battery by him self( prevent doing anything with your device during this time. I found starting application, touching screen etc. leads that the device request a pick of power which the battery is not able to provide and turns the device off.
4) after certain time your battery will be to weak to keep the device on.
5) push the "power button + backlight button + reset pin" to put your device in to bootloader mode. (your screen will be almost off just some info like SERIAL or Bootloader Version will be visible)
6) again keep the device in this mode to drain as much you can until you cant see anything on the screen.
7) repeat this point6 few times as sometimes the device turns of but after trying again the button combination you can put it back to bootloader.
With above the aim is to drain the battery much as possible. After that you charge your device with power connection for min.12 hours. I guess you will gain few % however repeat the draining and charging procedure for next couple charging cycle to see how much max you will get back.
Good Luck.
I faced the same problem with my battery on Universal.
After a complete drain, the battery wont recharge:
1) Connecting the power cord it starts the boot process, after few seconds the power led ligths in red once, the screen blanks and the boot restarts again and again.
2) Using the usb cord the power led flashes in red without further actions.
I have to throw away the battery, I guess.
Thanks for any comment.
Cesare said:
I faced the same problem with my battery on Universal.
After a complete drain, the battery wont recharge:
1) Connecting the power cord it starts the boot process, after few seconds the power led ligths in red once, the screen blanks and the boot restarts again and again.
2) Using the usb cord the power led flashes in red without further actions.
I have to throw away the battery, I guess.
Thanks for any comment.
Click to expand...
Click to collapse
Cesare, One thing you could try before given up on your battery. Try to Use your power connection to charge for while before starting up your device.
How much is a new battery?
Bulldog said:
Cesare, One thing you could try before given up on your battery. Try to Use your power connection to charge for while before starting up your device.
Click to expand...
Click to collapse
Bulldog, many thanks for your replay.
When I connect the power cord the start up begins automatically.
There is a way to avoid the starting up?
Cesare said:
Bulldog, many thanks for your replay.
When I connect the power cord the start up begins automatically.
There is a way to avoid the starting up?
Click to expand...
Click to collapse
Cesare, you right when you plug in the device it will boot up. However after while (ca.10-15) when the first initialization complete you could go and switch off the screen(with power button) which takes allot power. Anyhow in your case it is really strange as your device behaves like it has no battery at all. there could be 2 things leading to that.
1) your battery is completely dead ( check with a voltmeter to confirm)
2) or something wrong with your Connection clips (battery and device) you could again check with a voltmeter whether you get any juice on those clips.
Bulldog said:
Cesare, you right when you plug in the device it will boot up. However after while (ca.10-15) when the first initialization complete you could go and switch off the screen(with power button) which takes allot power. Anyhow in your case it is really strange as your device behaves like it has no battery at all. there could be 2 things leading to that.
1) your battery is completely dead ( check with a voltmeter to confirm)
2) or something wrong with your Connection clips (battery and device) you could again check with a voltmeter whether you get any juice on those clips.
Click to expand...
Click to collapse
Hi Bulldog.
I think that the 1st one is the rigth hypothesis. I'll check with a voltmeter.
The connection clips are ok because the backup battery works perfectly.
To drain that battery I connected an optical usb mouse until the mouse ligth went off. Do you think that this action is the reason of the death?
Many thanks again
Cesare said:
Hi Bulldog.
I think that the 1st one is the rigth hypothesis. I'll check with a voltmeter.
The connection clips are ok because the backup battery works perfectly.
To drain that battery I connected an optical usb mouse until the mouse ligth went off. Do you think that this action is the reason of the death?
Many thanks again
Click to expand...
Click to collapse
Cesare, your battery my not complete dead but it is to weak to lighten up your Universal. Said that leads to bad thing which is: you can only start to charge battery when the universal has come out of bootloader mode.
I had such case ones, after not using my device for very long time the battery was completely drained, And as you described the device keep booting after plugging to the power. However after certain time ( I think some 15-30min trying) suddenly I was able to start up. I am not sure whether that would help to overcome the booting mode with less power but you could try to take out your sim card and memory card and try booting. ( again not sure it will help)
Guys - a quick update from my previous post.
I was suffering a sudden power outage at about 75%-85% battery power - just a blank screen - power gone. Didn't happen when mains connected, only on battery.
Well, first things first, I thought...dodgy ROM for WM 6 - so I tried a few of them - Ivans, Ranju's and Beastys - no change - still this power out.
Read the posts on this forum and thought - gotta be the battery's fried.
Sooo,
I ordered a new Genuine JasJar battery and installed it - (let it charge for 8 hours) - since then...no problems - no crashes, stalls or blank outs.
I'm running Ranju's 7.4 with spb pocket plus - htc home, etc,
As a point of interest my old battery stated 3.9Volts when I put my meter across it BUT - a voltmeter isn't drawing as much as the universal - when 'under load' from power intensive apps - hence you think you've got a battery putting out the requisite power when you haven't.
This was a real niggly problem to sort out with potential culprits all over the place:
Bad battery?
Bad ROM?
PCB crack?
Hardware Fault?
At the end of the day it's good to have spent £32 or so and simply got rid of the problem totally.
I'd say to anyone who's getting outs or blank outs at 80% power or below - your battery stuffed and no amount of mucking about with ROM swaps, Freezers, charging/ discharging is going to stop it blanking out on you.
I'd also like to say how appreciative I am of this forum with a great deal of knowledge available from so many users across a very broad spectrum of skills and experience. Nice one!
Hope this helps,
fanger
So we all know the major problem with the WP7 roms.
You can not charge your phone when battery is completely drained!
Now here is the solotion. This requires no apps, no mods. Just your own handeling!
So what to do when battery depletes?
1. Plug your phone into a powersuply.
2. Turn on the phone and keep the power button and both volumes buttons pressed. (this is called a hard reset.)
How to hard reset HD2, view the first 17 seconds. Ignore the VolUp!.
3. You will receive an message saying:
''This operation will delete all your personal data, and reset all settings to manufacturer defailt. Press VolUp to restore manufacture default, or press other keys to cancel.''
Click to expand...
Click to collapse
4. Do not press anything. Let your phone be for a couple of minutes. I keep my phone laying for a minimum of 10 minutes.
You won't see the phone charging (no orange light in upper left corner)! Believe me it is!
5. After 10 minutes restart the phone. If ''press any other button to cancel'' does not work. Take out the battery, keep battery out for 5 seconds. Restart phone.
6. Phone will start. After windows phone loading screen you will see the phone is charging. If you kept it on power. If not, you didn't follow my instructions.
Tip: to avoid battery drainage!
When the phone is making the bleep noice warning for critical energy level, turn off the phone and keep it at a warm location. Ideal is to take out the battery and keep that to as warm as possible. Batterys barely drain when they are in warm enviorments.
I am not responsible to any damage done to the phone!
I done this multiple times, all times it worked fine for me!
If it helped, Thank me and leave a comment
when i'm on the road there is only one warm place i could think off, besides my armpits...
but your method works, have faced it once.
Thanks for the conformation.
To bad the HD2, is kinda big... doesnt sit that well.
magldr works as well
whats not clear is if the battery controler is in use with this method, so be warned, dont leave it too long, if you charge it for no more than an hour it will be ok
mains power adaptors usually give out 1Ah, take in to account that the screen is on full, this should give you around 700mA, more than enough to get in to windows to charge propperly
USB charge will be half that, most USB ports only give out 500mAh so an hour will give you approx 200mA again, thats enough to get you in to windows
Overcharging a battery can have some side effects, firstly is reversed polarity, meaning it wont take as much charge in the future, or it could heat up a lot, which isnt good for anything, the life of battery or the device its self.
dazza9075 said:
magldr works as well
whats not clear is if the battery controler is in use with this method, so be warned, dont leave it too long, if you charge it for no more than an hour it will be ok
mains power adaptors usually give out 1Ah, take in to account that the screen is on full, this should give you around 700mA, more than enough to get in to windows to charge propperly
USB charge will be half that, most USB ports only give out 500mAh so an hour will give you approx 200mA again, thats enough to get you in to windows
Overcharging a battery can have some side effects, firstly is reversed polarity, meaning it wont take as much charge in the future, or it could heat up a lot, which isnt good for anything, the life of battery or the device its self.
Click to expand...
Click to collapse
That is true, but I recommend trying it for a minimum of 10 minutes keep it on charge. and as soon as windows pop on it recharges normally.
And didnt knew magldr did the job as well, the only problem is if you deplete it to badly it doesnt go past the HTC screen in the beginning.
all this is completely unnecessary.
easy fix solution:
1. Pull the battery out and USB cable out (if connected and charging)
2. Plug the USB into the phone and allow it to charge without a battery (it will not, duh!)
3. Put the battery in while the HD2's connected to the USB charging.
4. Observe that you can boot all the way back into WP7.
enjoy.
lemonspeakers said:
all this is completely unnecessary.
easy fix solution:
1. Pull the battery out and USB cable out (if connected and charging)
2. Plug the USB into the phone and allow it to charge without a battery (it will not, duh!)
3. Put the battery in while the HD2's connected to the USB charging.
4. Observe that you can boot all the way back into WP7.
enjoy.
Click to expand...
Click to collapse
I did not know that.
Well thank you. Although I am not such a big fan of taking out the battery when its not needed. I mean the change is short circuits with the connecting points when taking out, when powered or putting in when powered it larger. Now I heared from a comment above that MAGLRD does the trick as well. Now that is far more easier then all the others given above, Yours and mine
good tutorial on this. I cant believe the battery wont charge when dead thought this was a faulty error of the phone.
I flash boyppc rom v5 and my battery drained completely and now it doesnt start up I tried both methods available here. Please help.
faiz1120 said:
I flash boyppc rom v5 and my battery drained completely and now it doesnt start up I tried both methods available here. Please help.
Click to expand...
Click to collapse
theres 3 methods on here,
bootloader charge
magldr charge
remove battery charge
all three will benifit frm heating up the battery, do not cook it, or it may blow up
there is a 4th way but i dont recomend it unless nothing else works
take a usb cable mini or usb printer cable
cut off the end connector
strip back the wires and seperate them all, you want the red and black ones
make sure all the wires cant touch each other, cover the 2 unused wires with tape i
then connect the black wire to the (-) negative and the red wire to the (+) positive
tape them in place
the 3rd contact point on the battery isnt used in this method
finally connect the other end of the usb cable to the computer
dont leave it too long and when disconnecting remove the computer end first
faiz1120 said:
I flash boyppc rom v5 and my battery drained completely and now it doesnt start up I tried both methods available here. Please help.
Click to expand...
Click to collapse
I recommend this one.
It bypasses the system somewhat. Don't know what happens when battery is entirely drained, but it is worth a try.
easy fix solution:
1. Pull the battery out and USB cable out (if connected and charging)
2. Plug the USB into the phone and allow it to charge without a battery (it will not, duh!)
3. Put the battery in while the HD2's connected to the USB charging.
4. Observe that you can boot all the way back into WP7.
enjoy.
If it does not help. You can buy a new battery.
Click Here. Its not that expensive, a official new battery from HTC is around 30$is around 20Euro's.
lemonspeakers said:
all this is completely unnecessary.
easy fix solution:
1. Pull the battery out and USB cable out (if connected and charging)
2. Plug the USB into the phone and allow it to charge without a battery (it will not, duh!)
3. Put the battery in while the HD2's connected to the USB charging.
4. Observe that you can boot all the way back into WP7.
enjoy.
Click to expand...
Click to collapse
Thanks for this timely post Lemonspeakers. completely drained the battery listening to music on loudspeaker and didnt hear any warning. Couldn't hard reset then checked this thread.
On putting in the battery after charging the empty phone, the screen kept cycling between mgldr and HTC splashscreen so booted into sd android and the phone is fine.
I assume I didnt charge the empty phone for long enough (30 secs), I didnt warm the battery and I suppose I could have left it cycling until it charged up a bit more.
Thanks again
Toasit said:
I recommend this one.
It bypasses the system somewhat. Don't know what happens when battery is entirely drained, but it is worth a try.
easy fix solution:
1. Pull the battery out and USB cable out (if connected and charging)
2. Plug the USB into the phone and allow it to charge without a battery (it will not, duh!)
3. Put the battery in while the HD2's connected to the USB charging.
4. Observe that you can boot all the way back into WP7.
enjoy.
If it does not help. You can buy a new battery.
Click to expand...
Click to collapse
i tried but my phone doesnt start even then. my friend said it might be a kernel. i wanna flash stock but i dont know how because my phone isnt starting
my hd2 is a tmous. the 1024 one
Robbie P said:
Thanks for this timely post Lemonspeakers. completely drained the battery listening to music on loudspeaker and didnt hear any warning. Couldn't hard reset then checked this thread.
On putting in the battery after charging the empty phone, the screen kept cycling between mgldr and HTC splashscreen so booted into sd android and the phone is fine.
I assume I didnt charge the empty phone for long enough (30 secs), I didnt warm the battery and I suppose I could have left it cycling until it charged up a bit more.
Thanks again
Click to expand...
Click to collapse
your phone was not starting either? like it was black even though you pressed hard reset? how long do i leave it the empty phone to charge??
I "charged" it for about 30 seconds, suppose you could do longer
Robbie P said:
I "charged" it for about 30 seconds, suppose you could do longer
Click to expand...
Click to collapse
I left the phone without the battery and left it plugged in for 2 hrs and still no luck.
faiz1120 said:
I left the phone without the battery and left it plugged in for 2 hrs and still no luck.
Click to expand...
Click to collapse
This would be funny if it wasn't so serious.
Have you tried warming the battery? Hairdryer warm
Dont know if you have mgldr so maybe try the hard reset option
Robbie P said:
This would be funny if it wasn't so serious.
Have you tried warming the battery? Hairdryer warm
Dont know if you have mgldr so maybe try the hard reset option
Click to expand...
Click to collapse
I have magdlr but I can't even get it into hard reset. I can try the hairdryer warm the battery
faiz1120 said:
I have magdlr but I can't even get it into hard reset. I can try the hairdryer warm the battery
Click to expand...
Click to collapse
That might work.
Otherwise maybe a phone repair shop, there is equipment that can charge your battery outside an phone. An emergency charger its called if I am not mistaken.
you could inform there.
its showing symtoms of it bring bricked. cause it doesnt charge, it doesnt turn on without the battery, and yeah conclusion is that its dead!
Hi guys,
First of all these are my specs
N7 WiFi 16GB - 4.2.2 PA
Yesterday I tried to turn on my N7 but no go... so i thought: no battery since I didn't used my N7 for 2-3 days. I put it on charge a few hour but then when i tried to turn it on, again... nothing, so i tried to reset and hard reset but no effect... afte letin it a few more hour on charge I tried yet again and noting... i tried to keep power button presed for 30 sec, 60sec, etc... nothing...
Then i conected it to my PC and realized that nor W7 nor W8 recognized my device... It says "USB device not recognized" and also in device manager it says "Unknown device"
The thing is that when I Hard reset it conected to the PC it seems to restart since i get the "disconnected device" sound from windows and the then message "USB device not recognized" appears again...
I want to make this clear MY SCREEN NEVER TURNS ON! so i can't get in recovery or bootloader mode
Also fastboot doesn't see it
And yes I have the correct drivers on my PC on both W7 and W8...
So PLS...ANY Idea would be appreciated!!
Sorry for my English, I hope I was clear enough so that you guys understand my problem and what i did about it until now.
the fact that you cant even get the screen to turn on doesn't sound promising...
are you sure the battery is holding a charge?
jt.one said:
the fact that you cant even get the screen to turn on doesn't sound promising...
are you sure the battery is holding a charge?
Click to expand...
Click to collapse
As far as I can tell there is battery, so that is not the problem ...
Probably would be best to send it to warranty and see what they say ...
TY for reply
Za_RO_Maniac said:
As far as I can tell there is battery, so that is not the problem ...
Click to expand...
Click to collapse
Since the screen never comes on in any circumstance, what do you mean by "as far as I can tell"?
Normally - if the device is powered off - the bootloader (or some other low-level firmware?) displays a charging animation in the display when you plug the device into a charger. If the battery is completely discharged, it will show up as empty (all black with a white outline), and then display a "filling up" animation. If the battery is mostly charged, that animation starts with the battery icon almost full (mostly white) and the animation shows a "topping off" display.
In any event, if you can see that animation, you will know the exact charge state of the battery: the percentage of the battery charge is shown as the percentage of the battery which is white at the beginning of that animation.
But, since you are saying that you are seeing nothing, then you have no idea whether the battery has a charge unless you pull off the connector and measure the battery voltage: discharged is ~ 3.5v and fully charged just shy of 4.2v.
The thing you are seeing on the PC is probably APX mode. It is usually a sign of serious trouble - but only if you have positively verified that the battery has a decent charge.
Anyway, my point is that you kneed to know unambiguously whether the battery has a charge or not before you proceed any further. A discharged battery looks identical to a hard-bricked device.
BTW, I suppose that in APX mode the device is drawing a small amount of current; this means it will inevitably discharge the battery again if it is left in that mode.
So, here is one suggestion:
Take the back cover off the device and unplug the battery. Let the device sit for ten minutes or so with the battery disconnected. (If you have a voltmeter, you can measure the battery voltage at this time so long as you are able to do it safely - don't accidentally short it! - and without damaging the connector. If not, don't worry about it). Press the power button once or twice during this time to dissipate any stored charge in the device.
Then, reconnect the battery pack, but do not attempt to start the device yet! Just plug the N7 onto the charger and see if you observe the charging display. If you see the charging display, don't get all excited and try to start the device up right away! Let it charge for a couple hours before attempting to start it. If you don't see anything at all, it still might be a good idea to leave it sit on the charger for a few hours before attempting to start it up.
good luck
bftb0 said:
Since the screen never comes on in any circumstance, what do you mean by "as far as I can tell"?
Normally - if the device is powered off - the bootloader (or some other low-level firmware?) displays a charging animation in the display when you plug the device into a charger. If the battery is completely discharged, it will show up as empty (all black with a white outline), and then display a "filling up" animation. If the battery is mostly charged, that animation starts with the battery icon almost full (mostly white) and the animation shows a "topping off" display.
In any event, if you can see that animation, you will know the exact charge state of the battery: the percentage of the battery charge is shown as the percentage of the battery which is white at the beginning of that animation.
But, since you are saying that you are seeing nothing, then you have no idea whether the battery has a charge unless you pull off the connector and measure the battery voltage: discharged is ~ 3.5v and fully charged just shy of 4.2v.
The thing you are seeing on the PC is probably APX mode. It is usually a sign of serious trouble - but only if you have positively verified that the battery has a decent charge.
Anyway, my point is that you kneed to know unambiguously whether the battery has a charge or not before you proceed any further. A discharged battery looks identical to a hard-bricked device.
BTW, I suppose that in APX mode the device is drawing a small amount of current; this means it will inevitably discharge the battery again if it is left in that mode.
So, here is one suggestion:
Take the back cover off the device and unplug the battery. Let the device sit for ten minutes or so with the battery disconnected. (If you have a voltmeter, you can measure the battery voltage at this time so long as you are able to do it safely - don't accidentally short it! - and without damaging the connector. If not, don't worry about it). Press the power button once or twice during this time to dissipate any stored charge in the device.
Then, reconnect the battery pack, but do not attempt to start the device yet! Just plug the N7 onto the charger and see if you observe the charging display. If you see the charging display, don't get all excited and try to start the device up right away! Let it charge for a couple hours before attempting to start it. If you don't see anything at all, it still might be a good idea to leave it sit on the charger for a few hours before attempting to start it up.
good luck
Click to expand...
Click to collapse
I was referring to this yes : "The thing you are seeing on the PC is probably APX mode."
So ill try your advises and come back with feedback !
TYVM
It appears dead. It's late at night so i've yet to try googling about recovery through a pc of some such, truth be told while i can flash a rom with instructions, i'm no guru or anything. It was running CM 10.2? the latest stable release for N10, think that's the one.
I was just browsing a forum, and after posting, the disply started to stutter as i scrolled up, when i stopped scrolling, the stuttering decreased, and then as i scrolled and scrolled fasster, the stuttering increased until display turned black (stoned curiosity...) and now i can't get anything out of my N10. Holding power, trying to reboot into recovery. Nothing. No lights, sounds, vibrations. None of the normal stuff.
anyone got any ideas for me to awke up to? I think that if i can't get any life out of it, then would it be a case of trying to sideload or such with ADB? as i say, i'm a complete rookie, just a couple of flashes under my belt.
Second question, i probably have the answer to, but am i right in thinking custom roms void the warranty?
edit: Plugged it into the wall a few minutes ago. It had had about 40% remaining, but when i plugged it in, i got the battery simbol on the screen (big white battery charging in center) and any time i press or hold the power button, or with volume buttons, i get nothing but the icon. I'll keep it plugged in for now and see what happens. But by the look of i assume if it can do that when plugged into the wall i sohuld hpoefully be able to connect via my computer in some manner
If by stuttering you mean blinking, this has happened to me when my N10 was on charger with a dead battery and it drew more power than what the charger could provide. When you scroll, the CPU frequency gets bumped up and the tablet consumes more power. After a while it just turned off for me (when I changed to an other app I think), when there just wasn't enough power.
So I would suggest leaving it on charge for a few hours, then try holding all buttons and see if you can get into bootloader. I've had the battery levels not display correctly on some custom ROMs, (for example I would do a reboot at 60% battery and after it reboots it only said 13%) so just charging it a bit might solve the problem.
bee55 said:
If by stuttering you mean blinking, this has happened to me when my N10 was on charger with a dead battery and it drew more power than what the charger could provide. When you scroll, the CPU frequency gets bumped up and the tablet consumes more power. After a while it just turned off for me (when I changed to an other app I think), when there just wasn't enough power.
So I would suggest leaving it on charge for a few hours, then try holding all buttons and see if you can get into bootloader. I've had the battery levels not display correctly on some custom ROMs, (for example I would do a reboot at 60% battery and after it reboots it only said 13%) so just charging it a bit might solve the problem.
Click to expand...
Click to collapse
Thanks. As of 5 minutes ago it got back to life. All battery apps showed 40 odd. Strange.
i think your battery has gone/ on its way out, exact same happened to mine, you need a pogo charger and the original wall adapter to provide enough power to switch it on. Only thing which worked for me, hope it works for you.
hellomynameistj said:
i think your battery has gone/ on its way out, exact same happened to mine, you need a pogo charger and the original wall adapter to provide enough power to switch it on. Only thing which worked for me, hope it works for you.
Click to expand...
Click to collapse
Might be the battery, might be glitchy software. Plugged it in via USB and it worked sometime later. Will be keeping an eye on it.
It will probably be fine. I thought I had a bricked N10 but turns out the battery was dead. It is fine now. THought I had a bricked N7 also, turned out the battery plug got loose, (screen would flash every 2 seconds with static on the screen) popped it open and oushed the plug in and that is fine now too.
If it continues to die around the 40-50% mark, you'll need to send it in for repairs. Make sure they don't just try replacing the USB port on it, the battery itself is the culprit.
http://forum.xda-developers.com/showthread.php?p=44068051#post44068051