I have a feeling that the battery temp reading we see on our phones is actually the cpu temp or motherboard temp
I ran setcpu stress-test for about 30 minutes (phone unplugged) and the temperature got to nearly 50 degrees Celcius
Feeling the top middle area on the back of the phone (and the same area on the screen on the opposite side) that area feels hot, the battery however is stone cold.
So... Battery Temp = cpu temp?
Anyone got an opinion on this? Its important for the overclocking crowd
Sent from my GT-I9000 using XDA App
I can tell for sure that battery and CPU temps is always the same but where is the sensor?? On the battery or the CPU?
If I was designing this phone I would put it on the CPU as it is more likely to produce heat if overused.
However I just experience a drastic temp raise from 33C to 41C in 1 min just after pluging in the phone. I was using it but noting eavy. I was only changing some startup setting with an app called Autorun Manager. So it might be related to battery but according to what you said it is more likely to be located on the CPU.
I currently have one of those extended batteries and tmeperature rises to 52 C after 10-15 min of playing gameloft hd games. I have measured phone temperature with an infra red thermometer and battery was 30-32 degree and upper part of the phone (between sim card and camera seemed to be as high as 49 degree) so the sensor must be on the cpu or motherboard, not anywhere close to the battery.
Unless battery gets hot inside and is cold outside for some reason. And sensor is simply inside the battery like in a laptop battery (google: 'How Lithium-ion Batteries Work' and open first result)
In my personal opinion manufacturers wouldn't waste space inside the battery for additional sensor that looks pretty big on the website above. Furthermore a hot battery would be hot throughout its casing too.
Which sensor you people are talking about?
buntoo said:
Which sensor you people are talking about?
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Temperature sensor. Download temp+cpu from store and you'll know
Hi,i'm new here and sorry for my bad english
I'm on PA 3.1 and since PA's base upgraded from 4.2.1 to 4.2.2,my nexus 7's bottom left corner got warm and hot than normal,CPU temperature is usually at 36-37 °C,even when i just browsing/reading
I just want to know if anyone here got the same issue as i got
Thank you and sorry again for my bad grammar
I did the same jump as you from PA 4.2.1 to 4.2.2. I haven't had any heat issues at all. Mind you I have undervolted 50v across the board. It might be a rogue app.
Sent from my Nexus 7 using xda premium
androidkid311 said:
I did the same jump as you from PA 4.2.1 to 4.2.2. I haven't had any heat issues at all. Mind you I have undervolted 50v across the board. It might be a rogue app.
Sent from my Nexus 7 using xda premium
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what kernel do you use?
37-38 C is nowhere near to being high (if you are indeed talking about the processor Tj)
The stock kernel does a panic shutdown at 100 C, and rate throttles a little below that. (At the moment I can't remember if that happens at 95C or 90C).
That Tj temperature is measured by a circuit embedded in the face of the SoC chip itself, so it is literally the hottest place in the whole device.
I have run native multithreaded stress test codes simulaneously with OpenGL benchmarks, and while the lower left corner of the tablet gets warm, the maximum Tj I observed was about 85C (Stock kernel - no GPU or CPU OC'ing). When "idle" such as reading web pages, my stock device sits around 38C as well.
The only thing that is disconcerting about what you report is that you mention a warm tablet in conjunction with 38C. That shouldn't be the case unless you made the temperature measurement substantially later that the CPU/GPU load which created the temperature spike.
Remember that there is a substantial delay between a peak temperature felt through the case and when the CPU goes up to high temperature. In my experience, it takes several minutes of maxing out the processor(s) before you start to to notice that "lower left corner" hot spot. So if you are observing that behavior regularly, you do have a reason to be concerned.
good luck
bftb0 said:
37-38 C is nowhere near to being high (if you are indeed talking about the processor Tj)
The stock kernel does a panic shutdown at 100 C, and rate throttles a little below that. (At the moment I can't remember if that happens at 95C or 90C).
That Tj temperature is measured by a circuit embedded in the face of the SoC chip itself, so it is literally the hottest place in the whole device.
I have run native multithreaded stress test codes simulaneously with OpenGL benchmarks, and while the lower left corner of the tablet gets warm, the maximum Tj I observed was about 85C (Stock kernel - no GPU or CPU OC'ing). When "idle" such as reading web pages, my stock device sits around 38C as well.
The only thing that is disconcerting about what you report is that you mention a warm tablet in conjunction with 38C. That shouldn't be the case unless you made the temperature measurement substantially later that the CPU/GPU load which created the temperature spike.
Remember that there is a substantial delay between a peak temperature felt through the case and when the CPU goes up to high temperature. In my experience, it takes several minutes of maxing out the processor(s) before you start to to notice that "lower left corner" hot spot. So if you are observing that behavior regularly, you do have a reason to be concerned.
good luck
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I'm sorry,its 60C,not 36
I have mistake CPU temperature with battery temperature
dangnhap01 said:
I'm sorry,its 60C,not 36
I have mistake CPU temperature with battery temperature
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Understood. I should have said "cat /sys/kernel/debug/tegra_thermal/temp_tj" to be clear.
60 C does seem a bit high for a N7 which is supposed to be doing very little work.
Mine (stock jdq39) is sitting here doing nothing but with the screen on (plugged into USB), not charging and it is about 42-43 C.
The effects of heat are cumulative - you should look into it.
Hello Guys, i registered to XDA developers to ask this question so please reply. i heard many say GPU of Nexus 4 is very bad because after 20 mins of gameplay the phone gets heated and the GPU performance is Dramatically Reduced to cooldown. I am going to buy Nexus 4 thats y im asking, i didnt hear this from my neighbours..., i saw someone say this in youtube comments. Anyone Experiencing this Issue? or its a defective product?.
This is a good thread to read about Thermal Throttling: http://forum.xda-developers.com/showthread.php?t=2144652
I am not sure about the GPU actually reducing it's power when the nexus is getting hot. I know the CPU will clock lower when it has reached 70 degrees so it can cool down. Most kernel's have the ability to up this to about 100 degrees so you won't have the thermal throttling as fast. You are also able to remove the throttling completely with a commando.
I've played alot of Dungeon Hunter 4/GTA Vice City/Real Racing 3 and I have never experienced severe FPS drops because of it getting hotter. The only thing you will experience is a battery that will be empty within 2 hours.
PS: This is based on what i've read on the forums, I do not have my nexus 4 for that long and I am not a developer, someone might be able to give you more accurate information.
The thermald.conf sets the battery threshold to about 40-41C before it begins to underclock aggressively (hence why it feels sluggish). I forget the exact number. It starts reading "Overheating" status when it reaches about 46C. Max rated temperature for the battery is 60C.
At that battery temperature ~41C, the CPU is no more than about 50C, so it's not the CPU overheating.
If you feel so inclined, you can modify the thermald.conf with root to modify how aggressive the thermal throttling acts, within reason. Otherwise you'll cook your phone.
desynch- said:
The thermald.conf sets the battery threshold to about 40-41C before it begins to underclock aggressively (hence why it feels sluggish). I forget the exact number.
At that temperature, the CPU is no more than about 50C.
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or you can run a custom kernel(like trinity) that disables the battery thermal throttle and not worry about it.
simms22 said:
or you can run a custom kernel(like trinity) that disables the battery thermal throttle and not worry about it.
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YMMV with that. My nominal binned SoC overheats really easily. With the way I use my phone, it'd be overheating way too often.
I modified my thermald.conf so it's less aggressive. It's not that hard to figure out.
The phone throttles its clock speed like a PC. It's not a big deal.
Hello, I've had my nexus 4 for about a week and a halfish now and I've noticed that the phone is running pretty warm after even just light usage. I download a battery temperature reader and a CPU temperature measurer. At Idle the batter temperature is at about 33-36 degrees Celsuis. And the CPU temperature at Idle is usually in the lower 40's at idle. Are these Temperatures to high?
Also When I plays games or use any apps for a just a few minutes the battery Temperatures get at around 40 degress C and the CPU temp is usually around the 45-50 area. Again Are these temperature to high?
I would really appreciate if anyone could give me useful help on this issue I'm having with my phone.
Is this normal for a nexus 4?
Should I be concerned?
Should I get a new nexus 4?
Andman012 said:
Hello, I've had my nexus 4 for about a week and a halfish now and I've noticed that the phone is running pretty warm after even just light usage. I download a battery temperature reader and a CPU temperature measurer. At Idle the batter temperature is at about 33-36 degrees Celsuis. And the CPU temperature at Idle is usually in the lower 40's at idle. Are these Temperatures to high?
Also When I plays games or use any apps for a just a few minutes the battery Temperatures get at around 40 degress C and the CPU temp is usually around the 45-50 area. Again Are these temperature to high?
I would really appreciate if anyone could give me useful help on this issue I'm having with my phone.
Is this normal for a nexus 4?
Should I be concerned?
Should I get a new nexus 4?
Click to expand...
Click to collapse
I'm assuming your Nexus 4 is a newer one (rev. 11). Nexus 4s have been known to run quite hot. My rev. 10 is at 42 C coming out of sleep without use, earlier when I played Need for Speed, it got to 60 C. It seems to be normal for mine, although it does get uncomfortably hot.
Andman012 said:
Hello, I've had my nexus 4 for about a week and a halfish now and I've noticed that the phone is running pretty warm after even just light usage. I download a battery temperature reader and a CPU temperature measurer. At Idle the batter temperature is at about 33-36 degrees Celsuis. And the CPU temperature at Idle is usually in the lower 40's at idle. Are these Temperatures to high?
Also When I plays games or use any apps for a just a few minutes the battery Temperatures get at around 40 degress C and the CPU temp is usually around the 45-50 area. Again Are these temperature to high?
I would really appreciate if anyone could give me useful help on this issue I'm having with my phone.
Is this normal for a nexus 4?
Should I be concerned?
Should I get a new nexus 4?
Click to expand...
Click to collapse
completely normal. right smack in the middle of the range of normal. remember, human body temperature average is 37C or 98.6F. when you use your device, the temp will go up when you use a cpu intensive game, the temperature will get even hotter. this all also depends on the surrounding air temperature. the warmer it is around, the warmer the device will get or idle.
Normal. Because the back is made of glass, it absorbs the heat and you feel it more than other phones.
Sent from my Nexus 4 using Tapatalk 4 Beta
Lol My Nexus S get's warm on idle because of the hot air around. haha my nexus 4 coming in 3 days let's see!
This btonons
Hmm, That seems weird, if the phone throttles you at 37 degrees shouldn't my phone not be idling at that temperature, and the my front screen seems to get warm after slight usage to. And looking on other forums people with a stock nexus 4 said that there phone idles around mid twenties, not the lower-mid thirties.
sidnoit22 said:
Lol My Nexus S get's warm on idle because of the hot air around. haha my nexus 4 coming in 3 days let's see!
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I hope you like it man, besides the warmness of the phone it's pretty sweet!
Andman012 said:
Hello, I've had my nexus 4 for about a week and a halfish now and I've noticed that the phone is running pretty warm after even just light usage. I download a battery temperature reader and a CPU temperature measurer. At Idle the batter temperature is at about 33-36 degrees Celsuis. And the CPU temperature at Idle is usually in the lower 40's at idle. Are these Temperatures to high?
Also When I plays games or use any apps for a just a few minutes the battery Temperatures get at around 40 degress C and the CPU temp is usually around the 45-50 area. Again Are these temperature to high?
I would really appreciate if anyone could give me useful help on this issue I'm having with my phone.
Is this normal for a nexus 4?
Should I be concerned?
Should I get a new nexus 4?
Click to expand...
Click to collapse
for hard working with QuadCore it s normal to get ~40 C quickly
But after 40C i think it s not normal and it s better to ask official service
Andman012 said:
Hmm, That seems weird, if the phone throttles you at 37 degrees shouldn't my phone not be idling at that temperature, and thetfront screen seems to get warm after slight usage to. And looking on other forums people with a stock nexus 4 said that there phone idles around mid twenties, not the lower-mid thirties.
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Click to collapse
look at the time they were posted. now its warmer eveeywhere. and again, human body temp is 37C. you have a quad core phone, it WILL get hot at times, that is normal. pushing the device, you might even see 70C or 75C.
simms22 said:
look at the time they were posted. now its warmer eveeywhere. and again, human body temp is 37C. you have a quad core phone, it WILL get hot at times, that is normal. pushing the device, you might even see 70C or 75C.
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Click to collapse
Hmm okay I have pushed the phone and the highest CPU temp I reached was about 60ish. I'm not exactly worried about how hot it gets, it's just how fast it gets hot, it seems a little odd that just running facebook and twitter for a few minutes can get the battery temperature up to 40 degrees celsius.
x102x96x said:
for hard working with QuadCore it s normal to get ~40 C quickly
But after 40C i think it s not normal and it s better to ask official service
Click to expand...
Click to collapse
That sounds similar to the results that I have found on the web, people said that to get there battery temperature up to 40 degress they have to push the phone, mine gets there just by opening a few apps.
If you want to cool it down and you are happy with messing about with your phone, try undervolting the CPU. Although I tend not to check the temperature, my phone (UVd by around -150) feels far cooler; playing Real Racing it doesn't get as warm as simple browsing would on stock.
Sent from my Nexus 4
Tom540 said:
If you want to cool it down and you are happy with messing about with your phone, try undervolting the CPU. Although I tend not to check the temperature, my phone (UVd by around -150) feels far cooler; playing Real Racing it doesn't get as warm as simple browsing would on stock.
Sent from my Nexus 4
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I have heard of this, but I'm more focused on how the temperature should be on this phone untampered. Rooting and tweaking kind of scares me a bit.
Andman012 said:
That sounds similar to the results that I have found on the web, people said that to get there battery temperature up to 40 degress they have to push the phone, mine gets there just by opening a few apps.
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Try faux kernel and undervolt t by -125 my friend using that combo and its mostly 25degrees.
Sent from my Nexus S using Tapatalk 4 Beta
Andman012 said:
Hmm okay I have pushed the phone and the highest CPU temp I reached was about 60ish. I'm not exactly worried about how hot it gets, it's just how fast it gets hot, it seems a little odd that just running facebook and twitter for a few minutes can get the battery temperature up to 40 degrees celsius.
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40C is not hot. get that out of your head. idle temp will depend on the air temperature around you. yesterday was 91 in nyc, my phone was idling between 39-42C. stick your hand in 40C water, itll barely feel warm.
simms22 said:
40C is not hot. get that out of your head. idle temp will depend on the air temperature around you. yesterday was 91 in nyc, my phone was idling between 39-42C. stick your hand in 40C water, itll barely feel warm.
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40 C is 104 F degrees, That would feel more than just "barely warm"
Andman012 said:
40 C is 104 degrees, That would feel more than just a "barley warm"
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On a surface like metal it would, but not in water. That said, the back of the phone isn't water but I'm sure the temperature of the back of the phone is lower than the CPU
Sent from my Nexus 4
Tom540 said:
On a surface like metal it would, but not in water. That said, the back of the phone isn't water but I'm sure the temperature of the back of the phone is lower than the CPU
Sent from my Nexus 4
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Couldn't agree more, The back of the phone I wouldn't say it HOT, but it is definitely very warm. But I'm not talking about how hot the phone feels. I'm trying to ask about the internal temperatures and if it's normal for it to heat up so fast.
Andman012 said:
Couldn't agree more, The back of the phone I wouldn't say it HOT, but it is definitely very warm. But I'm not talking about how hot the phone feels. I'm trying to ask about the internal temperatures and if it's normal for it to heat up so fast.
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again. this is normal. 104F would not feel more than slightly warm water.
the glass in the back of the phone is there to draw out the heat from the phone. its glass, and will feel warm. if you have problems with 40C, then i would recommend that you buy a dumb phone. my nexus 7, galaxy nexus, and nexus 4 all idle a bit warmer now than in winter. 40C is very normal.
simms22 said:
40C is not hot. get that out of your head. idle temp will depend on the air temperature around you. yesterday was 91 in nyc, my phone was idling between 39-42C. stick your hand in 40C water, itll barely feel warm.
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Its normal, have a look at the graph!
Sent from my Nexus 4 using xda premium
With normal tasks such as browser, phone and messaging, the CPU temp of my phone is around 38-40. With tasks as YouTube and graphics intense games it's between 50-55. At this point, the phone feels really hot.
Are these expected temp level or is there some problem with my phone?
With asphalt, the temp averaged around 65C. While downloading the additional content it reached 75C.
I rarely see mine above 45. I've only seen 50 a few times. Throttling kicks in bad above 50
Sent from my Nexus 6P using Tapatalk
How can i check the temp of the CPU? Most of the apps don't even show temperature on 6P and CPU Z gives me like 15 different readings ;/
For this I had used CPU Temp. But yeah after the update, it says that it cannot determine the temperature.
In CPU Z, I was unable to understand the readings. One of the app, said that there is no temperature sensor to determine the reading of the phone. So not sure if we can get the accurate temperature.
But the phone is for sure getting too hot. I feel Nexus 6p has heating issue, or atleast mine does.
45-60 shouldn't damage your CPU, but 75+ can be harming for phone's integrated circuit
tarunsoni said:
But the phone is for sure getting too hot. I feel Nexus 6p has heating issue, or atleast mine does.
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Remember that it will go up to 70°C maybe higher and the aluminium case spreads the heat making the whole device hot (LG G3 was very hot only in specific area, because it was plastic).