Related
My Nexus 7 is no longer charging while turned on. If I power it off it'll charge with the battery symbol. I can't even get my PC to recognize it while plugged in to USB. I'm using the stock charger and cable. Any thoughts?
I'm currently running Paranoid Android 2.54, however when this started I was on 2.50. I thought flashing a newer version might help.
Not charging
Plus 1 on this issue,
Running stock ROM and it updated yesterday to version JOP40C now it's only charging when turned off.
+1, same here, but now it won't charge as the battery got completly drained.
Still does not charge. This is a launch N7, curious if Google will replace it.
Sent from my Nexus 4 using xda app-developers app
I just received a replacement seven this week for the same issue, mine stopped charging. I called google play customer service, and they didn't give me a hastle at all.
Were you rooted/running a custom ROM? I am, and with my N7 not getting recognized I feel like flashing back to stock might be problematic.
Sent from my Nexus 4 using xda app-developers app
darksonic said:
Were you rooted/running a custom ROM? I am, and with my N7 not getting recognized I feel like flashing back to stock might be problematic.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
yea, rooted, custom ROM and kernel. doesn't matter though, it just started one day randomly. I finally did get it to charge BTW, by giving it a few firm smacks on the back. they didn't even ask if it was with root or if it was a custom ROM. if its hardware related, it won't make a difference. i sent it back with twrp recovery, rasbean jelly rom, and trinity kernel. i did wipe the data and the storage before i sent it in.
Yeah my Nexus' charging is messed up since 4.2. Battery seems to run down extremely quickly (around 30% in two hours with Spotify on and general browsing.) Plugging it into the wall with the official charger sometimes charges it EXTREMELY slowly, and sometimes just says its charges and still the battery is running down.
It happened to charge last night, and over the course of around 10 hours, I think I had 60% battery. Trying to charge now, and nothing, just losing battery. No idea what the issue could be. Tablet completely stock.
Sent from my Nexus 7 using xda app-developers app
+1 on this issue. N7 isn't charging when turned on, no charging issues if turned off. It isn't recognized when connected to a PC. Whenever I try switching users, the darn thing restarts itself. It does the same thing when I try USB debugging. I am running 4.2.1.
Please help!
Investigated problem
After upgrading to 4.2.1 my N7 charged very slowly. Finally today I decided to investigate it, albeit inaccurately.
Plugging a 2A charger into my 120V power monitor, I noticed the following:
When the N7 was on, the power draw continually alternated between 0 watts and 2 watts.
When the N7 had been shut down from the bootloader (not from the OS) and the cable plugged in/out, the power draw was a constant 2 watts.
The max charging rate of the N7 is around 10 watts.
So it looks like the N7 is will charge either very slowly, or kind of slowly. What I find strange is that this issue only occurs on some devices. Perhaps later devices use a different charging controller?
Either way, would really like a fix for this.
__Adam said:
After upgrading to 4.2.1 my N7 charged very slowly. Finally today I decided to investigate it, albeit inaccurately.
Plugging a 2A charger into my 120V power monitor, I noticed the following:
When the N7 was on, the power draw continually alternated between 0 watts and 2 watts.
When the N7 had been shut down from the bootloader (not from the OS) and the cable plugged in/out, the power draw was a constant 2 watts.
The max charging rate of the N7 is around 10 watts.
So it looks like the N7 is will charge either very slowly, or kind of slowly. What I find strange is that this issue only occurs on some devices. Perhaps later devices use a different charging controller?
Either way, would really like a fix for this.
Click to expand...
Click to collapse
From the way you described your test setup, you seem to be measuring the power consumed by the charger itself on a 120 VAC source. The wattage there should be low, albeit still higher than what you're seeing. Along that line, if you ever see it go up anywhere near 10 watts, then something has gone horribly wrong.
Also, the slow charging seems to be peculiar to 4.2 and above, indicating that it is not actually a hardware issue.
same!
Been having the same problem for a few days now, I was on stock 4.2 and updated today to a custom ROM based off of 4.2.1 and there is still no difference. Anyone found a solution yet?? Its quite concerning especially since I got mine from GameStop in the US then moved to the UK shortly after!
Just wanted to add, before this started I was having the same problem that is talked about here http://forums.androidcentral.com/google-nexus-7-tablet-forum/228706-nexus-7-problem-wont-charge-when-does-screen-goes-dead-pixels-fly-across-screen.html
I figured it was caused by letting the battery drain completely so I opened it up pulled the battery plug out, plugged it back in and charged it till it was full and it continued to work. haven't let it die since.
Same problem here, stock Nexus 7 running 4.2.1, roughly 2 months old.
It charges when the device is turned off, but will not charge when powered on -- started happening about 2 weeks ago (charged fine previously). This is using the stock brick and cable that came with the tablet.
I have to imagine that this is a software issue and that the next one will have a similar problem -- has anyone else swapped one out and had the problem disappear with the new one?
dave
Hey guys, noob here. Tried to thoroughly research this issue before posting but I cannot figure it out. When I first got the phone I fully charged it with the wall charger and it charged at normal speed and when I went to the battery menu it said charging (AC) Later on I plugged it into my computer so that I could put some music on it and ever since then when I plug it into the wall it says charging (USB) and its slow as hell to charge. Basically unusable for day to day use. So far I have tried multiple chargers, factory resets, and restarting the phone with the charger plugged and unplugged. Also, when I plug the phone into the computer now it just charges and does not show up as a device or anything. I have contacted Google about a replacement, but god knows when I will get one. Any help would be greatly appreciated!
I'm charging my phone for the first time on my PC and it's taking forever also.
cole631 said:
Hey guys, noob here. Tried to thoroughly research this issue before posting but I cannot figure it out. When I first got the phone I fully charged it with the wall charger and it charged at normal speed and when I went to the battery menu it said charging (AC) Later on I plugged it into my computer so that I could put some music on it and ever since then when I plug it into the wall it says charging (USB) and its slow as hell to charge. Basically unusable for day to day use. So far I have tried multiple chargers, factory resets, and restarting the phone with the charger plugged and unplugged. Also, when I plug the phone into the computer now it just charges and does not show up as a device or anything. I have contacted Google about a replacement, but god knows when I will get one. Any help would be greatly appreciated!
Click to expand...
Click to collapse
Bro, the PC USB output is much less than 1.2 ampere output provided by the wall charger.... Lessee ampere means slow charging.... Charge with wall charger
Sent from my Nexus 4 using xda premium
Sounds like there is a setting for the USB connection like with the HTC Flyer where you tell it the kind of connection you want to use. Whether you want connect to pc or charge only. For the Flyer it will charge a little when connected to a computer but if you want to just charge it via the wall charger you need to select charge only.
Gluttony666 said:
Bro, the PC USB output is much less than 1.2 ampere output provided by the wall charger.... Lessee ampere means slow charging.... Charge with wall charger
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Did you even read his post? The phone thinks its charging over USB when its plugged into the wall and is charging slowly. Something is definitely wrong.
Sent from my Nexus 4 using xda app-developers app
Gluttony666 said:
Bro, the PC USB output is much less than 1.2 ampere output provided by the wall charger.... Lessee ampere means slow charging.... Charge with wall charger
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Sorry I guess I should have phrased better, I am aware that USB charging speeds are way slower but the issue is that when plugged into a wall charger, the phone thinks it is charging through USB and charges ridiculously slow.
Is this happening with the charger and cable that came with the phone? If so, I'd try to RMA it. Google should have stock to cover warranty purposes.
Stryder5 said:
Is this happening with the charger and cable that came with the phone? If so, I'd try to RMA it. Google should have stock to cover warranty purposes.
Click to expand...
Click to collapse
Yep. Happening with the stock charger any every other one I have tried. Got an rma for it and the shipping estimate was the 25th but now it switched to pending. Don't know if that is good or bad
Try a factory reset, settings > backup & reset > factory reset. Missed it in your original post but it wouldn't hurt to try it again if you're gonna RMA it.
Sent from my Nexus 4 using Tapatalk 2
Get a multimeter. Check for continuity on the middle two contacts of the USB charger. (While unplugged)
You should have continuity. If you do, blame the phone. If you don't, blame the charger.
Sent from my Nexus 4 using Tapatalk 2
My nexus4 yesterday have the same error, only charge USB mode (original 1.2a , sony 1,5a and samsung 1.0a chargers) but today charge AC mode
May be when is hot only charge in USB mode?
Thanks guys, I guess I will try out the multimeter thing and report back. Finally got a full charge into it over night so maybe that was all it needed. I will report back with any solutions I find in case anybody else develops this problem.
Sent from my Nexus 4 using xda app-developers app
Now my nexus start charging AC mode and then, randomly change to USB mode.
When the device is wireless charging on what mode is, USB or AC?
Sent from my Nexus 4 using xda app-developers app
Mine says USB right now. It must be temperature based. Odd they would change it from AC to USB. I would have gone the warning message route. E.g. "Stop using your phone if you ever want it to charge. 'AC - slow' charge now enabled."
Sent from my Nexus 4 using Tapatalk 2
Or borrow another charger to test the same issue. You could even see if it's the cord or adapter by swapping them as well.
I let my phone cool off. It went back to AC charging. Definite temperature issue. Just odd is says USB/AC and not hot/cold.
Sent from my Nexus 4 using Tapatalk 2
Finally I have found my problem, was the original LG cable, with other Samsung usb cable works fine and always chage AC mode.
I have phoned to google support and don't change the charger or cable only, they change all the box (phone and charger)
diegocr said:
Finally I have found my problem, was the original LG cable, with other Samsung usb cable works fine and always chage AC mode.
I have phoned to google support and don't change the charger or cable only, they change all the box (phone and charger)
Click to expand...
Click to collapse
This should be the better way. 2€ isn't worth to wait three weeks for a new phone...
Just mi thougths
xXSturmiXx said:
This should be the better way. 2€ isn't worth to wait three weeks for a new phone...
Just mi thougths
Click to expand...
Click to collapse
Yes of course :good:
Glad you guys are able to solve your charging problems. My problem definitely goes deeper than a heating up issue. I have left my phone on charge without use for hours on many different charger setups (mix between LG, Motorola, and stock adapters and cables) and cannot get it out of USB mode. Still No sign of my replacement phone either. I also cannot get more than 7 hours of battery life out of the thing even with data, GPS, and sync off and screen on the lowest brightness. I think I just got an all around lemon /:
Sent from my DROID RAZR using xda app-developers app
I just wonderding how many ppl here got red light issues?
had this problem just now. discharged battery and wont turn on.
Ive had it 4 times lol get to bootloader flash to stock reflash rom all good to go
Sent from my Nexus 4 using Tapatalk 2
how?
joshndroid said:
Ive had it 4 times lol get to bootloader flash to stock reflash rom all good to go
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
i've tried all the power + volume combos...how did you get to bootloader?
If people just let their phones charge undisturbed overnight and tried the next day to boot, that number would be -80%..
I bricked my N4 by accidentally flashing a wrong bootloader - a simple error that proved fatal!
Sent from my Nexus 7 using Tapatalk 2
jchoong said:
I bricked my N4 by accidentally flashing a wrong bootloader - a simple error that proved fatal!
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
That would brick basically any phone. You don't play around with flashing the bootloader unless you're sure.
Got the red light once while doing benchmarks.. But i was able to get into bootloader mode reflash system img.And bam i was good to go..
Dang man, this same problem is happening to the LG Optimus G. There is a thread on xda for that phone and the op says to take the back cover off, disconnect the battery then reconnect it and that fixes it. Maybe worth a shot on the nexus.?? That is if you don't want to reflash the phone.
Sent from my Nexus 4 using xda premium
lyall29 said:
Dang man, this same problem is happening to the LG Optimus G. There is a thread on xda for that phone and the op says to take the back cover off, disconnect the battery then reconnect it and that fixes it. Maybe worth a shot on the nexus.?? That is if you don't want to reflash the phone.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Why you want to do it the hard way that void the warranty than the easy way?
Sent from my Nexus 4 using xda premium
I plugged on my friend's car charger and suddenly my phone turned off and wont turn on.
When I plug on charger or USB and keep holding power, red led blinks many times, faster and faster.
My computer wont recognizes it.
Any solution?
rsb007 said:
I plugged on my friend's car charger and suddenly my phone turned off and wont turn on.
When I plug on charger or USB and keep holding power, red led blinks many times, faster and faster.
My computer wont recognizes it.
Any solution?
Click to expand...
Click to collapse
Holy crap. It's literally IN THIS THREAD.
Leave it on your charger for several hours and see if it boots. If not, it's probably RMA time.
It's plugged for about 10 hours and nothing.
I live in Brazil, no sells here yet and it was bought on USA.
richteralan said:
Why you want to do it the hard way that void the warranty than the easy way?
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
I was just mentioning other options just in case someone couldn't get into the bootloader. What if you send the phone to lg because you couldn't get into the bootloader to reflash and they can by disconnecting the battery and find out that you are unlocked and rooted when the phone boots back up, which would also void your warranty. Although I would not take the back cover off if the phone was stock, might as well send the phone back if you can't get it to boot.
Sent from my Nexus 7 using xda premium
rsb007 said:
It's plugged for about 10 hours and nothing.
I live in Brazil, no sells here yet and it was bought on USA.
Click to expand...
Click to collapse
I am in exactly the same situation as you. Prospects to resuscitate our bricked Nexus 4 are extremely dim!
Im wondering if what is posted Here may cause this issue?
Please, any advice will be thanked.
donchele said:
Im wondering if what is posted Here may cause this issue?
Please, any advice will be thanked.
Click to expand...
Click to collapse
You seem to know very little about how chargers, batteries and charging circuitry works. To put your mind at ease, a USB 2.0 port is rated at 5V DC, 500mA. That will charge a Nexus 4, albeit slowly. Your 0.7A charger isn't going to fry anything, as there are multiple safeties built in, unless something is SEVERELY wrong with it, meaning faulty construction.
estallings15 said:
You seem to know very little about how chargers, batteries and charging circuitry works.
Click to expand...
Click to collapse
Yup, that is the reason im asking
estallings15 said:
To put your mind at ease, a USB 2.0 port is rated at 5V DC, 500mA. That will charge a Nexus 4, albeit slowly. Your 0.7A charger isn't going to fry anything, as there are multiple safeties built in, unless something is SEVERELY wrong with it, meaning faulty construction.
Click to expand...
Click to collapse
So you are telling me that, unless there is any issue with the charger (faulty construction) there is no reason to worry about that it will lead to this "Red light of death" or any other issue (lowering battery lifetime for example)?
This is totally off topic but, Do you (personally) think it's true what people say that charging a cellphone with a lower output charger increases its battery service?
Quick question:
Does this red light issue appear when battery is drain to 0% (among other factors)
donchele said:
Yup, that is the reason im asking
So you are telling me that, unless there is any issue with the charger (faulty construction) there is no reason to worry about that it will lead to this "Red light of death" or any other issue (lowering battery lifetime for example)?
This is totally off topic but, Do you (personally) think it's true what people say that charging a cellphone with a lower output charger increases its battery service?
Click to expand...
Click to collapse
There is no reason to worry unless the charger or your phone is faulty, in other words, hardware failure on either side. Unfortunately there would be no easy to foresee that.
The charging circuitry will only use what it needs to do it's job. As long as the voltage is within range and the current is not too LOW, you're OK. The N4 is rated at 900 mA to perform a standard charge. It will accept as low as approx. 500 mA to charge in USB mode. That idea is rubbish.
Or more like charging issues?
I've got this phone in December and I'm pretty satisfied with it. The only thing that kinda annoys me is the fact that my phone often won't charge properly and I'm not sure if it's because of the charger (the one that comes with the Nexus) or the battery.
When I charge it, it says that it's charging. Just like it should be. The problem is though, that it's not really charging. A few seconds later it says that it's discharging, not even a second later it's charging again, then discharging and it goes like that all the time. I'm almost sure that this harms my battery a lot. When I let it charge over night, most of the time the battery level is under 100% (50-60% are more likely) and that is kinda frustrating when going to work.
So I want to know: does anybody have the same issue or something similar? Or do I just have a faulty device/charger? This issue has been plaguing me for around a month now.
Sent from my Nexus 4 using xda app-developers app
xExabyte said:
Or more like charging issues?
I've got this phone in December and I'm pretty satisfied with it. The only thing that kinda annoys me is the fact that my phone often won't charge properly and I'm not sure if it's because of the charger (the one that comes with the Nexus) or the battery.
When I charge it, it says that it's charging. Just like it should be. The problem is though, that it's not really charging. A few seconds later it says that it's discharging, not even a second later it's charging again, then discharging and it goes like that all the time. I'm almost sure that this harms my battery a lot. When I let it charge over night, most of the time the battery level is under 100% (50-60% are more likely) and that is kinda frustrating when going to work.
So I want to know: does anybody have the same issue or something similar? Or do I just have a faulty device/charger? This issue has been plaguing me for around a month now.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Have you tried it with another charger? I always use a universal charger and that works fine. If that doesn`t help it is probably a hardware issue and you`ll need to get it fixed.
AW: N4 massive battery issues
Unfortunately I don't have any charger with an output of 1.2A. All of them are under 1.2A and most are broken anyway (also chargers from my last phone, LG Optimus 2X). Seems like I'm just not that lucky when it comes to chargers.. I'll try to find one though. Thanks for the reply.
Sent from my Nexus 4 using xda app-developers app
Just to test it, use your computer usb. It isn't full power but it is enough to see if there is an issue. Maybe a new cable?
AW: N4 massive battery issues
Not sure if this is related to my computer now but when I plug it in it says charging and as soon as the MTP notification pops up it doesn't charge anymore.
Should I try to fully discharge my battery and then recharge it?
Sent from my Nexus 4 using xda app-developers app
AW: N4 massive battery issues
Okay so I somehow fixed it.. most likely temporarily but it seems like the issue is the cable. I pretty much "straightened" the cable with my fingers (was applying pressure to the cable and then went slowly downwards) and that apparently worked o_o..
Now it's been charging for 15 minutes without disconnecting once. I hope it'll remain like that..
Sent from my Nexus 4 using xda app-developers app
I've had my Nexus 4 for about 2 weeks now and currently it is taking a ridiculously long time to charge. It has been hooked up with the original USB to Micro-USB cable for about 3 hours at it went from 12% to 8% (wtf...) to 10% now and hasn't moved for the past hour. Someone help please
Try charging it from another charger it or a PC. Sounds like your charger is probably faulty.
Sent from my Nexus 4
steviewevie said:
Try charging it from another charger it or a PC. Sounds like your charger is probably faulty.
Sent from my Nexus 4
Click to expand...
Click to collapse
Thanks for the reply, I switched USBs and it is not going any faster
Reboot
Sent from my Nexus 4 using xda premium
When you say you switched USBs, you mean a different charger?
Sent from my Nexus 4
steviewevie said:
When you say you switched USBs, you mean a different charger?
Sent from my Nexus 4
Click to expand...
Click to collapse
Yea
i've got the same issue.
reset the phone may help.
Yeah you could try a factory reset. Failing that, re-flash the stock ROM. Failing that, RMA it.
Sent from my Nexus 4
steviewevie said:
Yeah you could try a factory reset. Failing that, re-flash the stock ROM. Failing that, RMA it.
Sent from my Nexus 4
Click to expand...
Click to collapse
I'm not entirely sure wether this is a "good" answer but are you charging by USB meaning plugged in your computer or laptop?
Because I've had it with several phones that if you put it in your laptop it doesn't charge or very very slowly. In the PC it goes faster but not as fast as straight from the wall.
Try plugging the charger in a wallplug, see if that helps? And also if you really want to charge by PC, flash a kernel (see Franco's thread) and put it on "Fast charge USB", then it should go at the same speed as wallcharged. (dunno how on stock rom)
-------------
If you meant that you've charged by plugging it into the wall in OP, then I'm sorry, I don't know Or just a faulty charger.
Daydream
disable daydream (while charging)
This also happens to me and I found out that when I plug my phone wall charger, in the battery menu it shows that the phone is charging using "USB" instead of“AC".....any help?
Sent from my Nexus 4 using xda app-developers app
shinewithme said:
This also happens to me and I found out that when I plug my phone wall charger, in the battery menu it shows that the phone is charging using "USB" instead of“AC".....any help?
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Do you have a custom kernel installed? Maybe there is a faulty setting in there. Worst case scenario is RMA, but try having the phone plugged in and then power the phone down. Once it's off, press the power button (don't hold it) and see if a battery animation comes up. If it does, then keep it plugged in for a few hours and see if it charges any faster...
try a different cable. For me, the cable went bad. when connected to the oem wall wart, my phone would sometimes be charging USB, sometimes A/C. After changing the cable (not the wart), always charges A/C now.
Install a battery utility and verify how much current it is drawing.