Nexus 7 auto shut off at 30% ??? - Nexus 7 Q&A, Help & Troubleshooting

Thought i was going crazy the first couple of times it happened but just "tested" it out today, once my nexus 7 hits about 33 % battery it shuts off.
What could be causing these?
Am running stock, no root or nothing and only widget that i have that has to do with the battery is battery widget hd , but that has no setting to do this i believe

It's not 33%, its 0 %. You see 33% and the system see 33% (so it doesn't do any mesure before shutting off) because your battery is not calibrated, and its 0% at that point..
You need to calibrate your battery, just that

RusherDude said:
It's not 33%, its 0 %. You see 33% and the system see 33% (so it doesn't do any mesure before shutting off) because your battery is not calibrated, and its 0% at that point..
You need to calibrate your battery, just that
Click to expand...
Click to collapse
:good:
how do i calibrate

Here is a thread you might find useful.
http://forum.xda-developers.com/showthread.php?t=1797126
Although I don't know exactly what to do, I can tell you that sometimes this can be easily fixed and sometimes it's simply a bad battery.
Best of luck.

pxlitup said:
Here is a thread you might find useful.
http://forum.xda-developers.com/showthread.php?t=1797126
Although I don't know exactly what to do, I can tell you that sometimes this can be easily fixed and sometimes it's simply a bad battery.
Best of luck.
Click to expand...
Click to collapse
Hi,
quick question, does the factory reset have to be on the stock ROM or will any ROM do?

Related

Display Battery Issue

Hello,
I can't believe this has not been mentioned already - but I've done a search and I can't see anything regarding this subject.
I'm just curious as to the battery chart in regards the Display. It is always really high. As a test - I charged my phone to 100% and then over night left my phone alone, with the screen off to see what the stats were. When i awoke the battery chart had the display eating up 54% (even though the screen had been off all night).
Is that normal? Can the Battery useage chart be trusted?
I'm running a rooted device - with XE2.
Am I missing something here
My chart has been 100 precise for me. Post a screen shot if you can.
Also make sure you are not running NoLED.
Yep, ill sort a screen shot out.
And what is NoLED?
Sent from my GT-I9100 using Tapatalk
thenoble06 said:
...
And what is NoLED?
...
Click to expand...
Click to collapse
So you are NOT running it
It is a utility that uses your screen to display notifications, because there is no LED indicator on the phone that flashes for missed calls, voicemails, messages, etc.
NoLED displayes those little dots on the black screen itself.
Theoretically it makes the screen to be always on, and wastes extra power. But again there is a huge market for that great app (developed by an XDA member here).
Ok - here is a screen shot. Anyone else getting results like this even when the screen is off??
I got the same battery issue like you when i was on KE1.
Sent from my GT-I9100 using XDA Premium App
thenoble06 said:
Ok - here is a screen shot. Anyone else getting results like this even when the screen is off??
Click to expand...
Click to collapse
i have the same problem, my sgs2 is so bad whit the battery life, i cant use the phone a normally working day from 07:00 until 17:00.. and allways i see the screen in the battery chart all the time whit more then 50% battery usage.
if this problem still exist, i will sold my device, thats not for a daily use..
Same answer as always .
Your display has been the part of the phone that has used most of the power used .
NOT your display is using 70% of the battery .
jje
JJEgan said:
Same answer as always .
Your display has been the part of the phone that has used most of the power used .
NOT your display is using 70% of the battery .
jje
Click to expand...
Click to collapse
but did you read the first post from the theard owner? over the night, the display stay the whole night off, and use more then 50% battery.. thats not normal sorry.. a device which runs between 4 and 6 houers its a device for fun and play, but not more..
when im driving to the work i need 1 hour and 20min.. in this time, the screen is maybe 10min on while im listening music, and in this 1 hour and 20min my battery drain is 22%..
unbelivable...
from 07:00h in the morning until 12:00h 5 hours later, my battery is on 50%. i had htc desire hd before, and this device had a 1300mah battery and it was better than samsung whit 1600mah..
im really dissapointed..
The display = the majority use of the battery fact .
OP thinks display showed using 54% of the battery overnight .
It showed as a percentage of the total power consumed that the display consumed 54% so if the battery dropped 10% of its capacity overnight then 54% of that was from turning the screen on .
I repeat the battery usage shows what has been using the battery as a percentage of the amount used it does not show the battery drain ,Or even amount of battery used in that time frame
||||||||||Drained 50% of battery today display 20% .
Drained 30 of battery yesterday display 70% ..
WHY HOW AND other stuff regarding battery usage on SGS 1 forum .
jje
after the night was the battery down 54%, e.g. have you lost %46 battery over night? Or was battery down to lets say 90% but display accounted 54% of that 10% loss???
Battery 100% to 99% that is 1% used thats clean with no battery stats .
Battery stats usage shows Display 74% .
Or the display has used 74% of the 1% used .
Its a really simple reading of the usage of the battery by the varying components its not a measure of the battery .
jje
JJEgan said:
Battery 100% to 99% that is 1% used thats clean with no battery stats .
Battery stats usage shows Display 74% .
Or the display has used 74% of the 1% used .
Its a really simple reading of the usage of the battery by the varying components its not a measure of the battery .
jje
Click to expand...
Click to collapse
thats what alot of people dont understand it seems........
i think we didnt understand us..
i try it again.
we start whit 100% full battery.. you dont touch your phone over the night.. and when you stand up, you look on it and see, the battery(only a example) is on 50%.. from this 50% which battery loose, 50% goes to the display.. so, the real drain from the display is 25%, over night, and you didnt switch it on.. you think that's not too much?
m_adnan said:
i think we didnt understand us..
i try it again.
we start whit 100% full battery.. you dont touch your phone over the night.. and when you stand up, you look on it and see, the battery(only a example) is on 50%.. from this 50% which battery loose, 50% goes to the display.. so, the real drain from the display is 25%, over night, and you didnt switch it on.. you think that's not too much?
Click to expand...
Click to collapse
yes its a problem. when i do that same test on another phone, display does not appear in the list. if i charge to full at night, unplug and go to bed. when i wake up 8 hours later, the top of my list says Cell Standby, WiFi, Android OS. Display does not appear.
once i use the phone for a few minutes, display jumps to the top very quickly.
RogerPodacter said:
yes its a problem. when i do that same test on another phone, display does not appear in the list. if i charge to full at night, unplug and go to bed. when i wake up 8 hours later, the top of my list says Cell Standby, WiFi, Android OS. Display does not appear.
once i use the phone for a few minutes, display jumps to the top very quickly.
Click to expand...
Click to collapse
i want to share this whit you, at the moment it looks like my problem is gone.. i will take a look on it today, but right now i look on it, and after 6h over night whitout ac and any use, the display is not listed and my battery drain is in 6h 8%.
what i did:
- boot in recovery mode
- wipe data
- wipe cache
- power off
- boot in download mode
- download follow rom:
http://galaxy.androidgamer.org/Firmware/GT-I9100_XWKE7_XXKE4_OXXKE2.zip
(rom is splited in three files, pda modem and csc, csc is oxxke2 is newer than
the original one in the xwke7)
- in odin choose repartition, auto reboot and force time, i allways flash whit the
pit file, so download it to if you want
---> finish.. other steps like root is not neccesssary to describe here.
---> i will report again today in the evening.
for me its better right now.. i found the drain is to quickly again, but really much better.. something around 22h, but whitout a lot of use.. this time on the first place is the android os in the battery chart.. display is showed on the place 3..

Battery display inaccuracy

This happens when battery level is below like 30% on my HTC Evo. I am using a customized ROM (Supersense). Whenever the battery reaches 30% remaining, it doesn't drop. However, if I use the phone for a while and restart it, the battery shows only 10%. Clearly, some of the battery management program does not work properly. Is it a bug related to battery itself (hardware) or ROM (software)? Anyway to fix this?
You could try charging your phone up fully then go into recovery and delete the battery stats(Under Advanced in CWM), unplug your phone and use it until it discharges fully and shuts off. Finally, recharge the phone fully again once it has died. I believe this will calibrate the software that monitors your battery or something like that. You can find more specific instructions on the net if you want. Some people like to bump charge and everything else to try to get it perfect but I never found the need to go to that extreme.
Evo_Shift said:
You could try charging your phone up fully then go into recovery and delete the battery stats(Under Advanced in CWM), unplug your phone and use it until it discharges fully and shuts off. Finally, recharge the phone fully again once it has died. I believe this will calibrate the software that monitors your battery or something like that. You can find more specific instructions on the net if you want. Some people like to bump charge and everything else to try to get it perfect but I never found the need to go to that extreme.
Click to expand...
Click to collapse
Download "battery left" from the market and it will recalibrate your battery. Also yes, I would reset battery stats as well but battery left will actually recalibrate it. Battery stats is how long the phone has been on, what's using the most battery, etc. Correct me if I'm wrong.
Just boot into recovery and wipe battery stats.
I had this problem once.
All I did was download "Battery Left" as VICODAN said and I flashed this zip that I got from somewhere on this site but I forget where. I had to change the updater-script and the binary but either way it works on our Shift. Charge to 100% and flash this, then with Battery Left install use the phone till it dies and after that, you should be golden.
battery calibration
U can try the app battery calibration also in the market. If you're rooted.
*Since we're talking about batteries.
I wish our phones would beep or set off an alarm when charged to 100%.
I was keeping battery calibration just for that, it has that option but only worked maybe 1 out of 20 times the alarm went off.
trsix said:
U can try the app battery calibration also in the market. If you're rooted.
*Since we're talking about batteries.
I wish our phones would beep or set off an alarm when charged to 100%.
I was keeping battery calibration just for that, it has that option but only worked maybe 1 out of 20 times the alarm went off.
Click to expand...
Click to collapse
Love the app, so when i got to sleep or I am going to calibrate, I just open the calibration app throw it on charge, it beeps I hit calibrate unplug and done. That way I don't have to open the app when It's 100% or with early morning fuzzy eyes and fingers that don't work right
Sent from My Team Supreme/MikSupreme Shift
ctzw said:
This happens when battery level is below like 30% on my HTC Evo. I am using a customized ROM (Supersense). Whenever the battery reaches 30% remaining, it doesn't drop. However, if I use the phone for a while and restart it, the battery shows only 10%. Clearly, some of the battery management program does not work properly. Is it a bug related to battery itself (hardware) or ROM (software)? Anyway to fix this?
Click to expand...
Click to collapse
Wrong forum...you state that you have a Evo, this forum is for Evo Shift.
Sent from my PG06100 using xda premium

PROPER battery calibration... is getting on my nerves :/

So, I am using MIUI 2.1.12 with LorDModUE 8.6 CFS 2WCR kernel.
I have installed 4EXT Recovery Controller and CurrentWidget.
With CurrentWidget, I monitored the battery while charging until it reached 0mA (which means the battery is as full as it can get).
With 4EXT Recovery Controller I removed the batterystats.bin file.
I drained the phone until it shut itself down. Then I charged it (without powering it on) until it was full (LED was green).
I power on the phone... 99% battery.
I plug in the charger... it says 26mA (which means it would reach 0mA as in full charge in another 20-30 minutes).
WHAT THE HELL?!
This never happened while I was using the default CM kernel included in MIUI. Only happened with Tiamat and LordMod.
--
Seriously, guys, what is the best way to calibrate the battery?! Perhaps I should not have let it shut itself down, but plug the charger when the phone was at 1% (which lasted for another 20-30 minutes, by the way)?!
if I don't remember it wrong the LED turns green at 90%.
afair the battery doesn't get charged during booting. which means that you probably lost the 1% during boot.
I also used the same method and got it calibrated correctly
but is their any other way too ?
monki79 said:
if I don't remember it wrong the LED turns green at 90%.
Click to expand...
Click to collapse
The LED turns green on AOSP ROMs at 90%, when the phone is ON, as far as I know. When it is OFF, it works fine (goes green at 100%).
I want to hear from the developers / those that know how these codes work and stuff... Cause I don't want to look at my phone how the percentage goes down so fast, then, when it reaches 10%, I can play Pocket Legends for another 20 full minutes -.-
Formhault said:
With CurrentWidget, I monitored the battery while charging until it reached 0mA (which means the battery is as full as it can get).
With 4EXT Recovery Controller I removed the batterystats.bin file.
I drained the phone until it shut itself down. Then I charged it (without powering it on) until it was full (LED was green).
I power on the phone... 99% battery.
I plug in the charger... it says 26mA (which means it would reach 0mA as in full charge in another 20-30 minutes).
WHAT THE HELL?!
Click to expand...
Click to collapse
The battery doesn't charge to full capacity first time around. When I used to calibrate the battery I would charge until it was drawing 0mA, then reboot; it would be drawing about 26mA, so I'd charge to 0mA again and reboot; it would now be drawing about 15mA, so I'd carry on charging to 0mA, reboot, repeat, repeat and repeat until it eventually continued to draw 0mA after a reboot. Then I'd delete the batterystats.bin file.
As one of Google's engineers says, deleting your battery stats isn't going to improve your battery life. I haven't done any of that for a long time now and I've noticed precisely no difference (except for the extra time I've gained by not having to wait for it to finally charge up to full capacity).
hopscotchjunkie said:
The battery doesn't charge to full capacity first time around. When I used to calibrate the battery I would charge until it was drawing 0mA, then reboot; it would be drawing about 26mA, so I'd charge to 0mA again and reboot; it would now be drawing about 15mA, so I'd carry on charging to 0mA, reboot, repeat, repeat and repeat until it eventually continued to draw 0mA after a reboot. Then I'd delete the batterystats.bin file.
As one of Google's engineers says, deleting your battery stats isn't going to improve your battery life. I haven't done any of that for a long time now and I've noticed precisely no difference (except for the extra time I've gained by not having to wait for it to finally charge up to full capacity).
Click to expand...
Click to collapse
I know about Google's statement.
The battery would drain fast, then, when it reaches 1% or 5%, you would be able to use your phone like it had 30%. Just that it shows the values wrong. Calibrating the battery should fix that...
Anyway... I'm not going to struggle any further.
I'll tell what I've done;
- I have installed Battery Balibration app and CurrentWidget,
- Waited battery charging till reached 0ma,
- Removed battery stats and restarted,
- Then waited to drain battery and shut-down itself,
- I connected USB charger to PC and TURN ON THE PHONE !!
- Again waited battery to reach 0 ma,
- Then plugged off and monitored that current widget shows the range btw 3-10 !!
I don't know exactly if it helps but, maybe you should turn on your DHD while carging..
For further instructions you may qant to check this topic;
http://forum.xda-developers.com/showthread.php?t=1226016
Formhault said:
So, I am using MIUI 2.1.12 with LorDModUE 8.6 CFS 2WCR kernel.
I have installed 4EXT Recovery Controller and CurrentWidget.
With CurrentWidget, I monitored the battery while charging until it reached 0mA (which means the battery is as full as it can get).
With 4EXT Recovery Controller I removed the batterystats.bin file.
I drained the phone until it shut itself down. Then I charged it (without powering it on) until it was full (LED was green).
I power on the phone... 99% battery.
I plug in the charger... it says 26mA (which means it would reach 0mA as in full charge in another 20-30 minutes).
WHAT THE HELL?!
This never happened while I was using the default CM kernel included in MIUI. Only happened with Tiamat and LordMod.
--
Seriously, guys, what is the best way to calibrate the battery?! Perhaps I should not have let it shut itself down, but plug the charger when the phone was at 1% (which lasted for another 20-30 minutes, by the way)?!
Click to expand...
Click to collapse
Theres a better alternative, use the battery calibration app in the market
https://market.android.com/details?id=com.nema.batterycalibration&hl=en
It's always worked a charm for me.
knp3385 said:
Theres a better alternative, use the battery calibration app in the market
https://market.android.com/details?id=com.nema.batterycalibration&hl=en
It's always worked a charm for me.
Click to expand...
Click to collapse
Right, with Battery Calibration i have solved my problem with battery, now i can use all day without charging.
Sorry if my question is a silly one...
what's the point in calibrating your battery? I mean... except for the stats (and I guess, the percentage in the bar), do you improve your battery life by calibrating it?
Duwie_80 said:
Sorry if my question is a silly one...
what's the point in calibrating your battery? I mean... except for the stats (and I guess, the percentage in the bar), do you improve your battery life by calibrating it?
Click to expand...
Click to collapse
Some says it's irrelevant, calibrating it's just an illusion
But did calibrate my battery and my battery life is improved too terrific !!
Duwie_80 said:
Sorry if my question is a silly one...
what's the point in calibrating your battery? I mean... except for the stats (and I guess, the percentage in the bar), do you improve your battery life by calibrating it?
Click to expand...
Click to collapse
fremce said:
Some says it's irrelevant, calibrating it's just an illusion
But did calibrate my battery and my battery life is improved too terrific !!
Click to expand...
Click to collapse
I don't really know. It would be silly for the Android system to display the battery percentage (up there, in the status bar) by reading the batterystats.bin.
My phone's battery level drops somewhat fast, then, when it would reach 30% or so, it doesn't drop as fast. Also, at times, when I reach 10%, 5% or even 1%, I am still able to play an intensive game like Pocket Legends for an extended ammount of time (30 minutes, for example). Pocket Legends is CPU/GPU intensive and it also requires an active Internet connection, so I'd say it's pretty power hungry.
I don't really get the entire purpose of calibration. I have done it and I can't seem to notice any difference.
I'm going to do it again, now, because I switched to a Sense ROM (RunnyDrOiD). I'll monitor the battery with Battery Monitor Pro. When it reaches +0mA, I'll reboot and so forth so forth until it's drawing 0mA, although I doubt I'll resist that much time, so I'll just delete the batterystats.bin after a few reboots, when it reachs 0mA.
fremce said:
Some says it's irrelevant, calibrating it's just an illusion
But did calibrate my battery and my battery life is improved too terrific !!
Click to expand...
Click to collapse
If everybody knew the meaning of the word "calibration" then nobody would talk such nonsense.
Calibration improves the accuracy of the percentage shown!
The illusion is that you improve your battery life with it....
Dlog said:
If everybody knew the meaning of the word "calibration" then nobody would talk such nonsense.
Calibration improves the accuracy of the percentage shown!
The illusion is that you improve your battery life with it....
Click to expand...
Click to collapse
As I said... calibrating the battery may fix the "problem" where once you reach 1% / 5% you can use your phone like it still had ~20%.
I'm gone test it too...
Hi there people, I didn't find any battery thread similar to what I'm going to say so I'll spam a little bit
I've just found as I was fooling around this: http://www.ebay.com.au/itm/PowerSki...AU_MobilePhoneAccessories&hash=item20c1a1c8ad
It suppose to be a silicon case with a battery build in(1500mah ..not bad), I don't know the dimensions but I just someone might think it as a solution to our 1230mah small battery(with this you have a total of 1730mah which is plenty)
P.S. To mods.. feel free to delete my post, I just wanted to inform the people about a solution that might be handy
evronetwork said:
Hi there people, I didn't find any battery thread similar to what I'm going to say so I'll spam a little bit
I've just found as I was fooling around this: http://www.ebay.com.au/itm/PowerSki...AU_MobilePhoneAccessories&hash=item20c1a1c8ad
It suppose to be a silicon case with a battery build in(1500mah ..not bad), I don't know the dimensions but I just someone might think it as a solution to our 1230mah small battery(with this you have a total of 1730mah which is plenty)
P.S. To mods.. feel free to delete my post, I just wanted to inform the people about a solution that might be handy
Click to expand...
Click to collapse
https://www.google.com/search?q=xda+powerskin+desire+hd
first link....

Battery reading issues

Hey everyone. So I bought a second hand note 4 recently and have been having battery problems.
I did a full wipe install of CM13 and the battery dropped to 0% at random times and I had to plug it in the charger for the phone to even boot as it would just restart as soon as it turned on. Anyway, i thought this is probably due to faulty battery. I purchased another one and now this one doesn't reboot at random times but seems like the phone keeps reading the battery percentage wrong, sometimes it doesn't charge over certain percent, just gets stuck at 77% or 63% or any percentage really. If I remove the battery and plug it back in, it shows a completely different percentage everytime. I have tried wiping battery stats, do a full discharge/charge, nothing seems to help. Battery drains fairly fast too, once I manage to get it to 100% it shows that expected time is like 2-3hrs if screen on. Thanks!
idoluvizsick said:
Hey everyone. So I bought a second hand note 4 recently and have been having battery problems.
I did a full wipe install of CM13 and the battery dropped to 0% at random times and I had to plug it in the charger for the phone to even boot as it would just restart as soon as it turned on. Anyway, i thought this is probably due to faulty battery. I purchased another one and now this one doesn't reboot at random times but seems like the phone keeps reading the battery percentage wrong, sometimes it doesn't charge over certain percent, just gets stuck at 77% or 63% or any percentage really. If I remove the battery and plug it back in, it shows a completely different percentage everytime. I have tried wiping battery stats, do a full discharge/charge, nothing seems to help. Battery drains fairly fast too, once I manage to get it to 100% it shows that expected time is like 2-3hrs if screen on. Thanks!
Click to expand...
Click to collapse
battery displaying different percentage after u remove it and put it back in is normal i have 3 note4s all do the same (up to 10 percentage change, it either increases or decreases) but the other issues like getting stuck on a certain percentage are not normal make sure u have the genuine battery and try stock rom.
yeah, i tried stock and the same thing really. such a random issue. I just noticed that battery charges once I turn the screen on and use it , so it only gets stuck on random percent only with screen off.
idoluvizsick said:
yeah, i tried stock and the same thing really. such a random issue. I just noticed that battery charges once I turn the screen on and use it , so it only gets stuck on random percent only with screen off.
Click to expand...
Click to collapse
U can try recalibraring the battery....
Bishal 00 said:
U can try recalibraring the battery....
Click to expand...
Click to collapse
yeah, i said I wiped battery stats, which is basically recalibration
once the battery is charged to 100% it also drops first 10-20% really fast and then it gets better but still I only get around 2hrs screen time
idoluvizsick said:
yeah, i said I wiped battery stats, which is basically recalibration
Click to expand...
Click to collapse
Oops my bad..Didn't read your whole post...
the only way to fix this replace your battery by new one
i tried all options (Format ROM - Wipe battery status - Getting back to stock ROM - Unroot - re Celebrate apps - Changing recovery-Removing battery from device for while sleeping - charge without fast charge - charge via USB)
i asked myself after that all of this headache doesn't worth 20$, i replaced the battery with new one and its working fine now
A0_o said:
the only way to fix this replace your battery by new one
i tried all options (Format ROM - Wipe battery status - Getting back to stock ROM - Unroot - re Celebrate apps - Changing recovery-Removing battery from device for while sleeping - charge without fast charge - charge via USB)
i asked myself after that all of this headache doesn't worth 20$, i replaced the battery with new one and its working fine now
Click to expand...
Click to collapse
yeah, i replaced battery as well but it's still the same issue. old one at least charged fully but would randomly reboot on me, the new one doesn't reboot but drains extra fast and doesn't always charge fully. can't believe both batteries are faulty
I am sorry for summoning this old post but did you find any solution to your problem? I have exactly the same experience with my note 4.
Thanks!
Is there a solution for this problem?
Power down and then out-and-in same battery and my stuck-at78%... was 100% when started.
if you having problems with auto restarting.... download the app " WAKE LOCK" and put it on Partial Wake Lock setting... your restarts will be a thing of the past.

Phone stays awake after being taken off charge

Hi there
Topic says it all.. when I take the phone off the charger after it has got to 100%, it will stay awake until I start using the phone.
This might sound insignificant, but I normally charge my phone at night - and if I wake up at say 2am and it's charged I just unplug it. The next time I use the phone around 7am, the battery will be down to 93% or something. This is because the phone remains awake for this 5 hour period.
As soon as I start to actually use the phone, it will begin to sleep as normal. I know phones stay awake while on charge so it's almost like this continues when unplugged. Has anyone else noticed this or can someone test to see if theirs does the same? Basic test is:
1) Charge to 100%
2) Unplug ONLY - don't unlock the phone
3) Leave it idle for 30 mins
4) Check the battery stats
Phone is on stock NPN25.137-33
Thanks
James
I can confirm this.
When you check the battery stats, what thing consumes the battery there?
saqlainrattansi said:
When you check the battery stats, what thing consumes the battery there?
Click to expand...
Click to collapse
It will just say "phone idle" which is absolutely useless. I'm not rooted so trying to find a wake lock is more difficult... my guess is it would just classed as a charge wake lock even though the phone is unplugged.
KapilFaujdar said:
I can confirm this.
Click to expand...
Click to collapse
Have you ever made any progress on working out what is causing it? I installed wakelock detector but nothing is jumping out at me.
surrealjam said:
Have you ever made any progress on working out what is causing it? I installed wakelock detector but nothing is jumping out at me.
Click to expand...
Click to collapse
I am not rooted so it is impossible for me to find the reason.

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