Database Users

Somebody tell me Wtf just happened

So my n7 ran out of power I turned it on and my wallpaper had been reset then voltage control started up and the whole tablet went crazy and the screen went solid grey?!?!
Edit: seems to be voltage control when it starts on boot. Anybody else have this problem?
Sent from my HTC One X

I've just had a funny do with mine.. playing games while plugged in to charge, seems I was using more power than it was drawing tho and the battery went - but when it did, the screen went a scrolling grey (bit like the old loading screens on a ZX Spectrum!) and making a crackly static noise. Plugged the plug to kill it, and I'll give it time to charge properly before turning it back on again

Same here I was using my nexus 7 while it was plugged on my PC and looks like my battery was discharging instead of charging looks like the tablet itself eat more battery then a charge would give x)
Sent from my Nexus 7 using xda premium

jamesst20 said:
Same here I was using my nexus 7 while it was plugged on my PC and looks like my battery was discharging instead of charging looks like the tablet itself eat more battery then a charge would give x)
Sent from my Nexus 7 using xda premium
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For a proper charge it needs 2 amps. Your computer only gives half an amp.
Of course it will discharge if you only supply it with a quarter of the power.

Seems to be that when overclocked it needs battery to work properly!
Sent from my Nexus 7 using xda app-developers app

scooby359 said:
I've just had a funny do with mine.. playing games while plugged in to charge, seems I was using more power than it was drawing tho and the battery went - but when it did, the screen went a scrolling grey (bit like the old loading screens on a ZX Spectrum!) and making a crackly static noise. Plugged the plug to kill it, and I'll give it time to charge properly before turning it back on again
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the exact same thing happened with mine. I was using motorola charger while playing games, and encountered the grey screen with the static noise. I panicked for a sec there!! After all I've only been using it for a day.
Charged it using my HTC charger and turned it back on. I checked the battery monitor widget and found out that my motorola charger delivered very little charge to the device. Googled about it and read somewhere that N7 is quite picky in terms of charger.

They're very picky about chargers. One charger that works really well and is available off the shelf for $25 is the Asus transformer prime charger available as places like office depot, and other retailers, probably staples and best buy.
The power spec of 2 amps required is correct, but even with 2 amp and higher output specs on the charger, many USB chargers with equal or higher specs still will only very slowly trickle charge because the N7 is so finicky about power sources.
Sent from my ADR6425LVW using xda premium

First time it happened to me I thought I bricked the thing. I wasnt even using it and when I came back to take it off the charger it the tablet was flipping out (im guessing i had some weird battery drain and a charger problem at the same time).
Shouldn't the tablet shut down before it gets that low on battery? It would've saved me the almost heart attack I had when I saw this happening.

will444 said:
Seems to be that when overclocked it needs battery to work properly!
Sent from my Nexus 7 using xda app-developers app
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Lmao I was overclocked to 1.8GHz too xD might be the reason
Sent from my Nexus 7 using Tapatalk 2

[Q] Slow Charge?

Had my Nexus 7 about a week now, had some system restarts at random times (when not even using the device) which is a bit of a concern, but read it could be the 4.2 update. But as hasn't happened while using so far it's not annoyed me. However charging is becoming a bit annoying. It's taking forever!
I have a battery widget installed and its stats tell the story. Battery is usually fully charge in: 6 hours 59 minutes.
It's plugged into the wall, with the cable and charger it came with, tried using an Apple charger block to see if it was that, no luck. Not tried another Micro USB cable yet, but may do if anyone thinks it could be that?
Also according to the stats it charges 1% every 7 minutes and I put it on charge at 9:45am this morning at 35% and it currently on 66% and it is now 2:55pm. It also says it will finish charging at 7:00pm tonight.
The app/widget is Battery Widget? Reborn! Does this have anything to do with the slow charging?
But this is a bit of a joke to be honest. Is my device faulty?

Mine charged from 1% to full in 2h10m today. Stock charger.
Sent from my Nexus 7 using xda premium

Foggy79 said:
Mine charged from 1% to full in 2h10m today. Stock charger.
Sent from my Nexus 7 using xda premium
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Hmm, you think mine is faulty?

craiigman said:
Hmm, you think mine is faulty?
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You are using the original 2A charger right? Have you tried with an other USB cable on it (might be broken?)
Also try to monitor your charging without the app, just write down what time you plugged it in at what percent and check it that way. (the app might show wrong readings).
If you have an other 2A charger you can borrow, you can try to eliminate that to. Not sure how long it takes via a regular USB port on the PC.
If it keeps charging that slow, your battery might be defect..
Good luck anyway

[Q] Runs directly from 5V DC?

Does Nexus 7 run directly from USB or charger power when connected to USB cable? Or is it so that the device continues to run on battery while the battery is simultaneously being charged? This is an issue related to the longevity of the battery. The easiest way to test this is to try and run the device on DC power while the battery has been removed. I have neither the tools nor the guts to check this out. Suggestions from anyone and everyone are welcome.

Tablet won't turn on without battery while being plugged in/charged, I tried it.
Sent from my Galaxy Nexus using xda app-developers app

thanks
Kuchar09 said:
Tablet won't turn on without battery while being plugged in/charged, I tried it.
Sent from my Galaxy Nexus using xda app-developers app
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and if we remove the battery while the tablet is running? (obviously while plugged in)

dmmbbs said:
and if we remove the battery while the tablet is running? (obviously while plugged in)
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Humm... Interesting, it stayed on. If i restart without a battery it will actually restart to the home screen but then restart if u try to click on anything.
So I guess ignore my first post, these are different results then I got a month ago.
Sent from my Galaxy Nexus using xda app-developers app

Settings-->Battery
Kuchar09 said:
Humm... Interesting, it stayed on. If i restart without a battery it will actually restart to the home screen but then restart if u try to click on anything.
So I guess ignore my first post, these are different results then I got a month ago.
Sent from my Galaxy Nexus using xda app-developers app
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Battery settings shows "X" seconds on battery and that X never changes if the tablet is connected(to PC/charger), no matter what you are doing. I connected the tablet to PC front panel USB, switched it on, it showed 100% charged and 0s on battery. Now I fired up Stability Test and after an hour or so battery settings showed 95% charging, 0s on battery. Your and my findings establish a point, i.e. The USB power provides direct power to the tablet upto a certain wattage, beyond which- as in case of a demanding load- the battery also/solely provides power. The battery is always being charged in background if it is not already fully charged.

[Q] 3 Hours of Charging = 30% Battery

I'm unsure what's wrong!!!
My phone has been fine, until it died today. I practice a 1 charge a day rule and I let my battery drain completely before I even think about putting it back on the charger.
Today, my phone died a littler earlier than expected, but that's okay because I was using my iPhone for most of the day. I got home at about 11PM and put my phone on the charger at 11:15PM. Here it is, 2:25AM and my phone only has 30% charge.
I've never noticed it charging this slowly before because I typically put it on the charger before I go to sleep and take it off when I wake up. This doesn't seem normal from ANY phone that I've ever used or troubleshooted in my life.
Why so slow? Is everyone's phone just as slow or should I be concerned?
Edit: I am using the charger that came with my phone in the same wall outlet that I've used since I got the phone. Nothing else is plugged into that outlet, either.

It would seem sensible to try a different charger and power outlet.
Sent from my Nexus 4 using xda premium

Your should be at 100% in that 3 hours. Try using a tablet wall charger.

With my phone, sometimes it charges in a flash, and sometimes it's charging for hours, idk why they do this.

drpepe said:
It would seem sensible to try a different charger and power outlet.
Sent from my Nexus 4 using xda premium
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I don't have another charger. All I own is Apple products, unfortunately.
I've done other other outlets throughout the house before posting, but I wouldn't see why the one I'm using is compromised in the slightest. It's charged the phone fine since I've gotten it.

dralways said:
Your should be at 100% in that 3 hours. Try using a tablet wall charger.
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The only Tablet I have is my iPad. I was thinking about just using the A/C adapter, but I was worried that that might mess something up with my luck. LOL.

You can't use the iPhone\iPad chargers as most of them don't comply with the USB charging standard (It will only charge at 500ma, the limit of USB charging).
You said it died quicker than usual as well? Sure nothing is running that drains the battery? Check the battery usage in settings after leaving it unplugged a while and see if you see anything that's using a ridiculous amount of battery.

I've had the same problem. Sometimes I plug mine into a wall charger and it reads Charging (USB) which may be your problem. Other times it reads Charging (AC).
Sent from my Nexus 4 using xda app-developers app

xrsxj said:
You can't use the iPhone\iPad chargers as most of them don't comply with the USB charging standard (It will only charge at 500ma, the limit of USB charging).
You said it died quicker than usual as well? Sure nothing is running that drains the battery? Check the battery usage in settings after leaving it unplugged a while and see if you see anything that's using a ridiculous amount of battery.
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It's been off of the charger for about an an hour and a half and nothing out of the norm is draining the battery. Screen on time is at 40%, but that's because I was reading all of my sports news and stuff from my device.
Interesting thing to note: I'm at 79% on my Nexus 4 after about an hour and a half unplugged and doing regular browsing. I'm at 98% on my 4s with doing just about the same things as I've done on my Nexus 4, and even watching a YouTube video on my 4s. I've also had a great deal of voice calls and texts this morning to my iPhone. They were neck and neck when I first got my N4 on December 10th. Now, it's dying faster. The only difference is that I've installed Spotify on my Nexus 4 since then... Which isn't running.

Chinese281 said:
I've had the same problem. Sometimes I plug mine into a wall charger and it reads Charging (USB) which may be your problem. Other times it reads Charging (AC).
Sent from my Nexus 4 using xda app-developers app
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It was reading USB last night! I thought that was normal, lmao... Thinking it meant "there is a USB cable charging it and not wireless charging."
Hm... The plot thickens, I guess.

Yeah it sometimes reads USB but if you unplug then plug it back in, it will change to AC. Not sure how to fix it but that's your problem right there.
Question: are you stock, rooted stock, or different ROM?
Sent from my Nexus 4 using xda app-developers app

Battery going bad?

So I have a rooted s4 running PAC-man rom on ktoonz kernel but before that I was on infamous alpha and using bioshock 2.0 kernel. Just a couple days ago I've noticed my battery has been really slow to charge. This morning I noticed it was actually losing battery life while on the charger. I tried calibrating it and draining dead then letting it sit.... Well it's been turn off on the charger for over an hour. When I turned it on it was only at 18%. During this time of my typing this.... It's dropped to 17 while on the charger. How can I tell if it's the battery or the charger. I only have one of each so I can't use different one. I've included some screens of my battery. i also noticed when i plugged in my phone to the computer the computer gave me a this would run better using a 2.0 usb.....thats never happened to me before
sent from my all Alpha no Beta S4

SkizzyNinja said:
So I have a rooted s4 running PAC-man rom on ktoonz kernel but before that I was on infamous alpha and using bioshock 2.0 kernel. Just a couple days ago I've noticed my battery has been really slow to charge. This morning I noticed it was actually losing battery life while on the charger. I tried calibrating it and draining dead then letting it sit.... Well it's been turn off on the charger for over an hour. When I turned it on it was only at 18%. During this time of my typing this.... It's dropped to 17 while on the charger. How can I tell if it's the battery or the charger. I only have one of each so I can't use different one. I've included some screens of my battery. i also noticed when i plugged in my phone to the computer the computer gave me a this would run better using a 2.0 usb.....thats never happened to me before
sent from my all Alpha no Beta S4
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Try using a different charger first. If that doesnt help try a different rom . also try charging with wifi and screen off

I've done all of them and so far the same result... But i had a buddy of mine bring over his s4 charger and it charged fine..... When i use his die hard calibration says AC plug in. With my charger it says USB..... I'm not really sure how to fix it other than buying a whole new charger
sent from my all Alpha no Beta S4

Sounds like there is a cracking in the solder of the data pins inside the charging block. They are shorted together to tell the phone that it is plugged into a regular outlet. What seems to be happening is that there is a faulty connection with them making the phone think it is on USB and making it only pull 500mah.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

graydiggy said:
Sounds like there is a cracking in the solder of the data pins inside the charging block. They are shorted together to tell the phone that it is plugged into a regular outlet. What seems to be happening is that there is a faulty connection with them making the phone think it is on USB and making it only pull 500mah.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
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As a short term fix till I get a new one can I use fast charge with my kernel to trick it into thinking it's not broken?
sent from my all Alpha no Beta S4