Database Users

Battery over heating

Battery heats up when charging. Very hot
Sent from my Nexus S using XDA App

What charger are you using?
Go to your dialer and dial *#*#INFO#*#* then select Battery Information.
What temperature is it showing when it's charging?

Its normal for the batt to heat up when its charging..but to an extent

I got the rockfish from best buy. It only heats up some times
Sent from my Nexus S using XDA App

kjy112 said:
I got the rockfish from best buy. It only heats up some times
Sent from my Nexus S using XDA App
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Click to collapse
Yes that's normal, but you said it gets very hot, and again, read my first reply to your post and tell me what you see, then we can tell you if your heating is normal or not.

make sure you turn off WiFi when you are charging the battery on your SNS
else it heats up really really fast and hot
that was the same on the SGS

Dude at bestbuy told me that chargers other than stock were frying the batteries
Sent from my Nexus S

jwr2d2 said:
Dude at bestbuy told me that chargers other than stock were frying the batteries
Sent from my Nexus S
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Click to collapse
i wouldnt even listen to someone at best buy even if it what he told you seemed favorable

It seems common behavior on the Nexus. My NS got up to 105° F last night (to be fair, it was under my pillow). I've simply taken to turning it off when I charge at night, but seeing as my NS is a glorified PMP (and therefore I don't have to worry about texts or other notifications on it), you might feel differently about simply turning it off.
Sent from my Nexus S using XDA App

It's interesting to note that the adapter for the Nexus S actually charges at(and I'm sure I'm getting my terminology wrong, sorry electricity guys!) .7AMP vs the 1AMP that other smart phones charges at such as the Nexus One.
This might account for the seemingly longer charge times we've had reported, and why you might be seeing increased heating from using a third-party more generalized charger. Whether or not there's any truth to the idea that it may cause permanent damage to your device, I don't know. I would greatly appreciate it if someone more knowledgable about this kind of thing would post, as I'm considering buying a second charger/car charger. In any which case, I personally take what Best Buy/T-Mobile/anyone's first level support tell me with a great big grain of salt.

google maps heating phone up
I just had a similar experience with my Nexus S getting really warm while using Google Maps this morning. I usually use Google Maps in Car Mode with traffic overlayed as I drive to and from work (~30-40 min. drive). This morning I noticed the phone got really warm by the end of my commute, which did not happen the previous 3 or 4 times I have used Maps in this same fashion. I will take nxt's advice and check the temperature on the phone next time it heats up again. Does anyone know what is a "safe" upper temperature limit for the phone or battery? I've read that higher temperatures are detrimental to the life of a lithium battery.
Other than this one time, I have not experienced any other high temperature issues with my Nexus S in the ~1 week that I've had it.
Thanks ahead of time for any help/advice. This is my very first smartphone and I am eagerly trying to absorb as much information as I can about it so I can determine what is normal/abnormal behavior. I am loving my Nexus S so far!

I don't think third party chargers are to blame. In fact, I'd go as far as to say the opposite is true. I read that the shorter data pins on the official charger cause the device to enter a faster charging state, as compared to the usb cable or third party chargers.

I've yet to feel my nexus s get warm at all... during charging w/ wifi on. Using samsung wall charger, using LG wall charger, using computers w/usb cable.

My NS gets hotter to the touch than my Vibrant ever did, but when I check the battery temperature it is never as high as my Vibrant used to get.
When charging in the car and running Navigation + streaming music the Vibrant would hit almost 125F whereas my NS tops out at 110F.
Sent from my Nexus S using Tapatalk

AllGamer said:
make sure you turn off WiFi when you are charging the battery on your SNS
else it heats up really really fast and hot
that was the same on the SGS
Click to expand...
Click to collapse
Well that kind of sucks if you're using it to Wifi tether and want to charge you SNS while you're doing it.

Bump.
Today was the first time I've felt my Nexus S get super heated when charging. Never happened before. I've been charging the same exact way since owning the phone back in December.
Odd.

onthecouchagain said:
Bump.
Today was the first time I've felt my Nexus S get super heated when charging. Never happened before. I've been charging the same exact way since owning the phone back in December.
Odd.
Click to expand...
Click to collapse
it depends on the usage
when i download TONS of stuff via 3G or WiFi it heats up a lot, only if i have it plugged in to the charger, else it does not heat up
However! if you check carefully, or better yet, if you take out the back cover
you will notice it is not the battery that is hot, but the area beneath the SIM card that is hot, which points to be the CPU

AllGamer said:
it depends on the usage
when i download TONS of stuff via 3G or WiFi it heats up a lot, only if i have it plugged in to the charger, else it does not heat up
However! if you check carefully, or better yet, if you take out the back cover
you will notice it is not the battery that is hot, but the area beneath the SIM card that is hot, which points to be the CPU
Click to expand...
Click to collapse
I see, thanks. Will keep in mind.

FWIW, I have been charging my Nexus S with the Nexus One charger (1 amp) since day 1 - I can't stand how short the stock charging cable and wall adapter were. I haven't had any unusual temperature spikes when charging at all. I don't even really notice it getting warm under heavy load - unlike the Nexus One with the aluminum casing that conducted heat very well. Edit: I also leave WiFi on with a No Sleep policy when I am at home and I've not encountered any warming issues either.

I would be careful if I ware you.. high heat is dangerous for the battery, it might swallow and even a leak if you will keep using your device constantly at high temperatures.
I Have never had any problems with heat and I have been using it a lot.
btw, I use stock rom..

Weirdness when plugged into wall?

Anyone else having issues with the phone when it is charging on the wall? Screen transitions get really choppy and touch screen sensitivity goes bonkers.
This is driving me crazy!
Sent via XDA app | HTC EVO | CM7 RC2

I've had this with CM7 as well. It's super annoying.

I've had this with most if not all Roms I've used. It depends where I plug my charger in honestly. Some places the touchscreen goes crazy some places it doesn't. Why? Hell if I know lol. I was starting to wonder if I was the only one with this problem.
Sent from my PC36100 using Tapatalk

I have had this problem before, but it is gone now. Could never figure out the cause...
It was never specific to CM for me. I found that at times, setting setCPU to clock up to max (not necessarily OC) when charging helped a little.
But for some reason the problem disappeared for me. Not sure why to be honest.

My phone only lags when I have the sd card mounted to a pc

It happens to me when I use one of the chargers I bought from Walmart. I think its a grounding issue.
Sent from my PC36100 using XDA App

Happens to me on Cm roms with HTC charger.

Its an issue with the charger. I have two completely differnet phones and the same issue happens on both when I use a certain charger. It charges fine but touchscreen goes to crap. Both phones work fine on a different one.

bsims85 said:
It happens to me when I use one of the chargers I bought from Walmart. I think its a grounding issue.
Sent from my PC36100 using XDA App
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Click to collapse
+1. Works fine with the OEM charger. But a cheap charger I got on eBay that charges a battery at the same time that it charges the phone always causes the touch screen to become completely unusable.

Not the charger. I have the same issue with my evo connected to the stock charger. It doesn't usually happen right away. In fact most times for me it isn't until charging us complete before I see a slow down.
I could be mistaken, but i believe it's a heat issue. The heat from charging the battery causes the CPU to enter a slower, low power state. This in turn will result in everything, not just the screen, becoming laggy. I've also noticed the same effect on hot days during the summer, if I let the evo get hot (like leaving it in a poorly ventilated area or heavy CPU/graphics usage), I get the same slow down.
I have not tried using setcpu but I suspect that thermal protection will automatically override user defined clock speeds.
Of course, all this is just my best guess, and I have nothing to prove it either way.
-SLS-

SouL Shadow said:
Not the charger. I have the same issue with my evo connected to the stock charger. It doesn't usually happen right away. In fact most times for me it isn't until charging us complete before I see a slow down.
I could be mistaken, but i believe it's a heat issue. The heat from charging the battery causes the CPU to enter a slower, low power state. This in turn will result in everything, not just the screen, becoming laggy. I've also noticed the same effect on hot days during the summer, if I let the evo get hot (like leaving it in a poorly ventilated area or heavy CPU/graphics usage), I get the same slow down.
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Click to collapse
Agree & Disagree.
From the world testing I've done I completely agree that heat is a cause that can cause the phone to act incredibly slow and unresponsive. I have accidentally left my phone in the car during summer, come back and hardly anything works
My disagreement is that I do also believe that the charger/charging effects the phone. Using the stock HTC charger I get an sporadic screen, sometimes immediately and other times delayed, while charging. It almost always shows up after a full night of charging (phone could/should be warm here, right?) but the moment I unplug the device it becomes immediately responsive (heat hasn't changed).
I don't know what the root cause is, heat I think is a contributor, but either way I just deal

I believe it's due to poor grounding, which affects the touchscreen.

Ive had this with cheap chargers
Sent from my PC36100 using XDA App

yep - its a grounding issue with the touchscreen caused by using a cheap charger OR a cheap cable OR a bad cable. It is NOT a problem with your phone. Get a nice OEM cable or a nice OEM charger and you'll be in good shape.

aweskelo said:
yep - its a grounding issue with the touchscreen caused by using a cheap charger OR a cheap cable OR a bad cable. It is NOT a problem with your phone. Get a nice OEM cable or a nice OEM charger and you'll be in good shape.
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Click to collapse
I have this issue with my stock htc cable and charger.
Sent from my PC36100 using XDA Premium App

disastar said:
I have this issue with my stock htc cable and charger.
Sent from my PC36100 using XDA Premium App
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Click to collapse
I remember when the Evo first came out there were grounding issues with the screen (hardware 0001), i.e. if you put it down on a bed or couch, you couldn't get the notification bar to pull down. I would also estimate that there are still some minor residual grounding issues still around. I get it every now and then as well, I'm also using the stock HTC cable and charger. However, that battery theory is a pretty smart thought.

disastar said:
I have this issue with my stock htc cable and charger.
Sent from my PC36100 using XDA Premium App
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Click to collapse
and perhaps you're cable is bad. stock cables do go bad, I've seen a few people with bad cables. They can fail in numerous ways.

If it is the cable or charger, why does it not happen on the stock ROM? Temp makes no difference.
EDIT: This DOES NOT happen with the stock ROM!
Sent via XDA App

Same cable, same charger (both stock), same outlet, does not happen with the stock ROM, but it does with CM7. I've just tested this quite a bit. Temperature is not a problem, either.

It happens to me after the battery hits 100% (on a non-sbc kernel) using stock cables, and stock chargers and my computer's USB for charging. It never happens on the stock kernel.
I'm not sure anyone ever knew for sure what caused the rash of these back in June/July, but I do know when I created the first FPS hacked kernel back then, it mysteriously cured some people's touch screen problems even though my modification didn't even remotely have anything to do with charging/touch input code.

Samsung Galaxy S2 very hot GPS + charging

Hi guys,
I used GPS for first time with my new SGS2. I was surprised how phone was hot. I had SGS but I never had any problem. GPS program is Sygic, I used same car charger, which I used for SGS. I drove home maybe 10min and phone was realy very hot, the screen also,back of the phone. Do you have same problem or do you think my phone is faulty?

Mine after 30 min surfing the internet is very hot (next to the camera and screen on top). Also i am worried about that...
Enviado desde mi GT-I9100 usando Tapatalk

Yes this I have same, but it is still OK compare to GPS and charging.

GPS + charge is always a hit or miss. My SGS was a little better, but my HTC Touch Pro 2 got blazing hot. All depends on the device, I'm more worried about the long term effects of such temperatures to the camera, which is in very close proximity.

I noticed when using sygic with gps that the battery continues to drain even when using the car charger.
Sent from my GT-I9100 using XDA App

XdaPete said:
I noticed when using sygic with gps that the battery continues to drain even when using the car charger.
Sent from my GT-I9100 using XDA App
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Click to collapse
There's a good answer to that. I had a cheap generic USB car charger and noticed it drained quicker than it charged. The reason is down to a pin on the USB connector. Your phone will only charge at rate it would if plugged to a PC. Buy a genuine Samsung car charger (about a tenner) and it uses fast/full charge. I think they remove/link pins which tell it how to charge. I also found it doesn't get as hot with a genuine charger
Sent from my GT-I9100 using XDA Premium App

skibadee said:
There's a good answer to that. I had a cheap generic USB car charger and noticed it drained quicker than it charged. The reason is down to a pin on the USB connector. Your phone will only charge at rate it would if plugged to a PC. Buy a genuine Samsung car charger (about a tenner) and it uses fast/full charge. I think they remove/link pins which tell it how to charge. I also found it doesn't get as hot with a genuine charger
Sent from my GT-I9100 using XDA Premium App
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Click to collapse
Maby I can confirm this ...
Was on a 1 hour trip using navigation.
My screen brightness was about 20%
Did not get warm and charged +6%
I use a standard Samsung charger.

Mittaa said:
Maby I can confirm this ...
Was on a 1 hour trip using navigation.
My screen brightness was about 20%
Did not get warm and charged +6%
I use a standard Samsung charger.
Click to expand...
Click to collapse
True is, I have non original car charger, but I bought some cheap one. Never charge my SGS, just kept at the same level. So I am going to buy original from Samsung.

When ur using anything Radio and/or charging for a long time its gonna get hot, by hot i mean burning hot. On my sgs, nexus one, cliq when i am on long phone calls (>30min) and charging they all get hot, and get hot when using gps even when not charging. GPS on SGS is a hit or a miss though, barely use that phone for gps

Don't listen to peopel telling you it's the charge that is causing the phone to heat up.
thats just nonsense.
Its the 1.2ghz cpu.. and the close tight body of the phone.
I had the Atrix, and after 10-15 of heavy usage or just gps, the bottom portion near the sim area would be hot to the touch.
Think about it this way.
Why do laptops even in such tight close spaces have some fan going? because things get hot.
Stop the fan on a laptop and let the heatsink just do the work and it will burn u.
Its just the thep hone despensing the heat.
I personally dont' think phones with 1.2ghz processors should be made so small, and not have some time of active cooling.
Seriously even if my NAS Server with a marvell 1.2ghz CPU has some type of cooling fan!
this is just ridiculous

Mine also tends to heat up. I then always take off the case and try to get it cooled down somehow. But i've experienced it myself: half an hour gps+navigation=processor hot as hell and battery drained down from 85% to 15%...hope the latest firmware update fixes this...and btw: heat is not very good for any kind of battery. It makes them drain faster afaik!
Cheers
Sent from my GT-I9100 using XDA App

Mine also heats up while browsing the net and gaming but it's never exceeded 36 degrees.

skibadee said:
There's a good answer to that. I had a cheap generic USB car charger and noticed it drained quicker than it charged. The reason is down to a pin on the USB connector. Your phone will only charge at rate it would if plugged to a PC. Buy a genuine Samsung car charger (about a tenner) and it uses fast/full charge. I think they remove/link pins which tell it how to charge. I also found it doesn't get as hot with a genuine charger
Sent from my GT-I9100 using XDA Premium App
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Click to collapse
Well I have a 1mA charger which I used with my HTC Desire to charge it during driving and navigating. It worked well with my HTC Desire (the HTC Desire also needs a pin connection, otherwise it won't charge fast enough during navigating) but the same charger did not work very well with the SGS2. Yesterday during navigation the battery level dropped slowly... Even though I used the same charger as I used with my HTC Desire.

demondor said:
Mine also heats up while browsing the net and gaming but it's never exceeded 36 degrees.
Click to expand...
Click to collapse
What program are you using to check temperature?
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charnsingh_online said:
When ur using anything Radio and/or charging for a long time its gonna get hot, by hot i mean burning hot. On my sgs, nexus one, cliq when i am on long phone calls (>30min) and charging they all get hot, and get hot when using gps even when not charging. GPS on SGS is a hit or a miss though, barely use that phone for gps
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Click to collapse
I did not have this problem with Samsung Galaxy S I think it was ok. Galaxy S 2 is much more hotter.

Bart1981 said:
Well I have a 1mA charger which I used with my HTC Desire to charge it during driving and navigating. It worked well with my HTC Desire (the HTC Desire also needs a pin connection, otherwise it won't charge fast enough during navigating) but the same charger did not work very well with the SGS2. Yesterday during navigation the battery level dropped slowly... Even though I used the same charger as I used with my HTC Desire.
Click to expand...
Click to collapse
Hmm that's odd. I'm using the same charger I used for my sgs '1'. I have to admit not tried navigation on my sgs2 yet for a long drive. Will have to test this.
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habs101 said:
Don't listen to peopel telling you it's the charge that is causing the phone to heat up.
thats just nonsense.
Its the 1.2ghz cpu.. and the close tight body of the phone.
I had the Atrix, and after 10-15 of heavy usage or just gps, the bottom portion near the sim area would be hot to the touch.
Think about it this way.
Why do laptops even in such tight close spaces have some fan going? because things get hot.
Stop the fan on a laptop and let the heatsink just do the work and it will burn u.
Its just the thep hone despensing the heat.
I personally dont' think phones with 1.2ghz processors should be made so small, and not have some time of active cooling.
Seriously even if my NAS Server with a marvell 1.2ghz CPU has some type of cooling fan!
this is just ridiculous
Click to expand...
Click to collapse
Yeah,u are right~
The competion of thickness between samsung and apple,or other android os manufucture like S.E has crushed samsung's mind.To elicit applause,the Korean giant just sacrificed the stability to make a both thin and powerful phone.
It's hard to say the choice is wise or not.But we can already find this company is becoming upset due to the pressure from the opponents.

Did Lincoln to London (135miles), phone in cradle with brightness 100%, CamerAlert and Google Navigation running, powered via USB converter in the car.
Battery went up about 1% every 20 minutes.
Phone out of cradle at the end wasn't hot to touch unlike every other phone I've had.

artesea said:
Did Lincoln to London (135miles), phone in cradle with brightness 100%, CamerAlert and Google Navigation running, powered via USB converter in the car.
Battery went up about 1% every 20 minutes.
Phone out of cradle at the end wasn't hot to touch unlike every other phone I've had.
Click to expand...
Click to collapse
IT seems that samsung has a quality variation. Did you use a brand charger or an aftermarket one?

Ok guys i am quite worried now. I played game about 10min and the top half of the phone is quite hot again. Do you have same problem or should I take mine back to a shop? I do not think this is normal right?

Battery DISCHARGING while Charging!!

Strange Issue!!
when my phone is low on battery and i try to charge it (with the original ac charger or the usb); sometimes (almost half the times) the phone instead of charging .... DISCHARGES!!
i have tried all possible fixes. tried the battery calibration apps also. but it gets ok for a day and then back.
i can only charge my phone while its switched off!
Details:
1. on stock TW4
2. 3 pages on home
3. total widgets= 6 ( advanced task killer; digital clock; 2- circle launcher; quick battery; weather)
4. i kill all tasks always before charging!
WHAT AM I DOING WRONG? BTW I HAVE TRIED TO REMOVE ALL WIDGETS AND CHARGE ALSO! NO LUCK!
HELP!!

It sound like you might have a faulty charger, have you tried charging from your notebook, it`s a bit slower at 400mah compared to 650mah for the mains charger.

Tinderbox (UK) said:
It sound like you might have a faulty charger, have you tried charging from your notebook, it`s a bit slower at 400mah compared to 650mah for the mains charger.
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Click to collapse
Yes, as a matter of fact, right now i am trying to charge through USB with the same drainage.
Switch the phone off for a while!... let the sucker charge.
And the problem is not always!

this is normal, already been posted. the charger is limited to 650 mA on wall power, and 450 mA on USB power. so it is easily possible to pull more power than is going into the device, say if you are gaming or pushing the device hard with navigation or similar.
next time this happens, turn off the screen for 10 minutes as a test, then come back, and see if the charge increased at all. it likely will increase.

RogerPodacter said:
this is normal, already been posted. the charger is limited to 650 mA on wall power, and 450 mA on USB power. so it is easily possible to pull more power than is going into the device, say if you are gaming or pushing the device hard with navigation or similar.
next time this happens, turn off the screen for 10 minutes as a test, then come back, and see if the charge increased at all. it likely will increase.
Click to expand...
Click to collapse
yup! i was having the same problem and did this Roger says and its exactly that... GL

if your phone is hot too it will not charge as well.

RogerPodacter said:
this is normal, already been posted. the charger is limited to 650 mA on wall power, and 450 mA on USB power. so it is easily possible to pull more power than is going into the device, say if you are gaming or pushing the device hard with navigation or similar.
next time this happens, turn off the screen for 10 minutes as a test, then come back, and see if the charge increased at all. it likely will increase.
Click to expand...
Click to collapse
My problem is when I'm not using the phone at all and the screen is off. Tried charging through both wall and usb charger.
The only way right now I can charge my phone is while switched off.
I always kill all apps before charging also... Still!
And if its charging while on, screen off, it gets hot also.
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vinaymieux said:
My problem is when I'm not using the phone at all and the screen is off. Tried charging through both wall and usb charger.
The only way right now I can charge my phone is while switched off.
I always kill all apps before charging also... Still!
And if its charging while on, screen off, it gets hot also.
Edit: i also have read in many places that using task killer actually cause more harm than good bcoz it disturbs the proper sequece of how android shuts down an app or process..and cleans up the memory..this will result some of the apps or process to stay awake or come awake again when it sould be sleeping...
Sent from my GT-I9100 using XDA Premium App
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Click to collapse
I once had this problem..after charging for 6 hours battery was only at 60% and phone was hot..found out that although the screen was off..the phone was wide awake all the time. For me the issue was the wifi manager was somehow awake and consuming power..hence phone was hot and battery drain while charging. Check your battery usage graph and see if your phone is awake when it should not be..and pin down the rouge app or process..
Hope this helps..
Sent from my GT-I9100 using Tapatalk

I've got a similar problem, while charging in a car using the SGS2 for navigation. BTW, what is the maximum Amper I can charge the phone without damaging it?

I really dont understand why Samsung keeps supplying this crappy charger. Desire Z and iPhone 4 both came with 1000mAh ones. Super fast charge on both! Come on sammy... This isnt a 900mAh feature phone. This is a big battery hogger dual core with a large battery inside!
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SkulleD_PT said:
I really dont understand why Samsung keeps supplying this crappy charger. Desire Z and iPhone 4 both came with 1000mAh ones. Super fast charge on both! Come on sammy... This isnt a 900mAh feature phone. This is a big battery hogger dual core with a large battery inside!
Sent from my GT-I9100 using XDA App
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Click to collapse
I am using HTC's 1000mA charger and still,this happens to some extent,only much less.Try overclocking the hell out of it and then start benchmarking.Charging?Hell no.You may even need to draw power from the house next to yours!

SkulleD_PT said:
I really dont understand why Samsung keeps supplying this crappy charger. Desire Z and iPhone 4 both came with 1000mAh ones. Super fast charge on both! Come on sammy... This isnt a 900mAh feature phone. This is a big battery hogger dual core with a large battery inside!
Sent from my GT-I9100 using XDA App
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Click to collapse
I read somewhre in this forum that samsung has set a limit of max amperage on this device to below 700 miliamp( cant remember the exact value for ac charging and usb charging) so thts why the charger is rated to 700mah
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iznee said:
I read somewhre in this forum that samsung has set a limit of max amperage on this device to below 700 miliamp( cant remember the exact value for ac charging and usb charging) so thts why the charger is rated to 700mah
Sent from my GT-I9100 using Tapatalk
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Click to collapse
That's right,but if the charger was 1000mA like HTC's it would continue to draw those 700mA it needs even while in use.You wouldn't notice any difference at all with it charging while not being used,but when screen is on there is a difference.

They limited charge current to 650 mA in the driver code, so that's why they use a 0.7 A charger. Using a higher output won't help unless someone compiles a new kernel.

I charge the phone until 100%. When unplug, it immediately drops to 85%-90%. On one occassions, it dropped to 40%! What's wrong with it?

iCatchU said:
I charge the phone until 100%. When unplug, it immediately drops to 85%-90%. On one occassions, it dropped to 40%! What's wrong with it?
Click to expand...
Click to collapse
As i posted before...something is always awake on your phone..try looking at your battery graph..and i am sure your device is quiet warm..
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iznee said:
As i posted before...something is always awake on your phone..try looking at your battery graph..and i am sure your device is quiet warm..
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Click to collapse
Thanks. But...i tried charging it whilst it was turned off. The icon showed 100%. I then unplug and switched it on. The same happened. So, it should not be Apps related. Right?

iCatchU said:
Thanks. But...i tried charging it whilst it was turned off. The icon showed 100%. I then unplug and switched it on. The same happened. So, it should not be Apps related. Right?
Click to expand...
Click to collapse
I suggest you do a simple trouble shooting...charge your phone to 100% while it is off.
Than unplug, switch on your phone and just leave it for half hour or an hour without doing anything.
Than swith your display on...and go to settings
Select about phone..
Go to battery use and tap on the graph.
It will show you a few horizontal lines.
Make sure your screen on and awake time bars coincide nicely.
While your screen is off your awake bar should be very very minumum... most of the high battery drain casses will have a very short screen on bar but a solid long line of awake time.
This is normally due to some rougue app or process...and you have to narrow it down.
If your graph looks normal..than you could be having a defective battery or in worst case a defective hardware.
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The max of 0.7 amps is a partykiller... When in my car, I'd like to have my phone record everything (dailyroads voyager as dashcam), while navigating... Definitely discharging there while on stock carcharger! So I will have to choose when I'm going on holiday (12 hours drive...)
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I had a same problem before. But after I reflash 2-3 times (literom 1.5 for now) it's gone, and charging normal on car and wall charger while gaming or navigate.

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
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