Seems the Nexus 6p has a cold bug. First phone i seen this in.
So i been doing some overclocking and bench marking on a few devices. The Nexus 6p has shown some strange behavior. When i had the phone chilled and ran some benchmarks the battery would drop drastically. Restart and all that did nothing. The batt. stayed at 39% for about 2 hours with some heavy use. Charged it back up no issues. Did it again and it did the same thing. Took my turbo 2 to an even lower temp and that was fine it did not have this.
Something you have to worry about? Nope not unless you are out in Alaska or taking a trip to the artic circle. However if you do this could cause you some issues.
Tested on a stock room and kernel. As well as a purenexus and elemental x combo. Same outcome.
Again not really an issue. And the Nexus camera visor and display survived the -40c freeze and back to room temp test. Attached is a pic of the massive drop
Not sure why the Droid Turbo didn't demonstrate this same behavior, but extreme cold temperatures definitely have an impact on lithium ion batteries. Perhaps the material of the Droid Turbo insulates the battery a bit better than the aluminum on the 6P?(pure speculation there - science geeks, feel free to rip that one apart)
I've experienced the same thing with my DSLR (Nikon D80) when shooting in the cold.
Sent from my Nexus 6P using Tapatalk
Devhux said:
Not sure why the Droid Turbo didn't demonstrate this same behavior, but extreme cold temperatures definitely have an impact on lithium ion batteries. Perhaps the material of the Droid Turbo insulates the battery a bit better than the aluminum on the 6P?(pure speculation there - science geeks, feel free to rip that one apart)
I've experienced the same thing with my DSLR (Nikon D80) when shooting in the cold.
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
Yeah the turbo 2 was even exposed to cooler temps longer. And its not that the capacity was lost. After the bench it would stay at that + for a few hours before it started going back down. So when i started at about 74% after it still had 74% less just android was saying that it was lower. I still managed to get a full charge out of it. Not an issues just a omg my batt is almost dead. Fallowed by omg my battery has been at this % for a few hours.
-40°C isn't really common weather and is definitely out of normal range of temperatures. I live in a area where it gets cold (-30°C) during wintertime, I don't really use phone in a such coldness (my fingers would freeze pretty fast anyway.)
I once answered phone in -25°C (current phone at the moment was Sony Ericsson W910i) I talked for 15 minutes and my battery went from 100% to 21% and shut down moment after the call ended.
Don't all batteries exhibit fluctuations in total output in extreme situations high or low? I use an iphone in a work truck that is left outside in 20f to 30f temps and that thing is crazy swinging from 100% charged when I leave it in truck to dead in one night in cold temps.
Sent from my Nexus 9 using Tapatalk
is there a particular reason you guys do this stuff?
Soulfly3 said:
is there a particular reason you guys do this stuff?
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Click to collapse
So we don't have to.
As an aside, the phones operating temp range.
http://imgur.com/aR9JMk7
JoshuaMh said:
So we don't have to.
Click to expand...
Click to collapse
Why would we 'have to'?
Stbrightman said:
Why would we 'have to'?
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Click to collapse
Perhaps gives an endurance threshold for those of us hiking in Alaska, or climbing an icy peak, ect.
Stbrightman said:
Why would we 'have to'?
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Click to collapse
I think it was a funny
Sent from my Nexus 6P using Tapatalk
My nexus 6P sorta died on me today, it was stored in my GF's bag, we were outside, 0F, for like an hour. When I go to take my phone, won't turn on, tried plugging it in, nothing.. could the cold weather (not so cold) have killed my nexus 6P ? Anyone has had this problem ?
I live in northern Finland and I have experienced this kind of behavior with my 6P lately. The battery dies suddenly under -10 C degrees if I keep it in my pants pocket. This is daily problem so have to wear my phone in wool mitten and then pocket it.
I think this started right after 7.1 update. My phone is 12 months old so it might be the battery losing its best edge or simply software feature/bug.
The battery model uses inputs from current flowing in/out in the battery, outter voltage and battery temperature sensors and calculates Open Circuit Voltage leading to the estimated State Of Charge (by use of a 3 degrees polynom)
As any resistor, the internal battery resistance will vary depending on temperature. So will the OCV calculation.
All these parameters are linked non linearly and the models are done within temperature ranges (different coefficients for say different temperatures). If temperature exceeds thresholds ( /sys/class/power_supply/bms shows a nominal range of [10 degC, 45 degC] ), the SoC will not be computed.
If temperature exceeds thresholds or SoC varies too widely, the battery current will be downlimited, meaning it won't charge as expected or could shutdown for safety reasons.
If battery temperature goes under 5 degC, the SoC is considered invalid.
As such when starting again the device within this range the SoC will be calculated again correctly and the device will stay on.
There are also high/low safety thresholds which will instantaneously shut off the device (I think they are stored in the Qualcomm IC so I can't see these values).
So while the battery can probably work fine under 5 degres C, the SoC won't be calculated properly. You can also get some feedback from the known battery health in /sys/class/power_supply/battery/health (Good, Dead, Warm, Cool, Cold, Overheat, ...)
I've gathered this information from the Qualcomm IC driver source
Sound like a Overclocking CPU with Liquid nitrogen haha.
This just happened to me today. I was out skiing and temps were -10 f. Phone shut off in less than an hour after starting from 100%. Went back inside, warmed up the phone and the battery was stuck at 39%. I moved my phone to an interior pocket closer to my body and didn't have a problem for the rest of the day.
As a avid skier, I can say I've always had extreme cold weather issues with phones, but the Nexus 6p is definitely the most severe.
FYI I'm on 7.1.1
This happened to my Nexus 6 today. I was in the garage (non heated) working on my car and had my phone sitting on a box next to me. It was about 30°F and I grabbed my phone to send a picture of something to my friend. As soon as I launched the camera it shut down. It booted instantly after pressing the power button, but after being on for about 15 seconds the battery percentage displayed in the status bar suddenly went from 51% to 0% and it shut down again. After bringing it inside to warm up my battery was back to 50%.
I've also taken my phone snowboarding in much colder temperatures and never had this issue. Even while using it on the chair lift where it's directly exposed to the cold and wind it's never shut down.
The only thing that has changed between past usage in cold weather and today is the version of Android I'm using. Unfortunately I'm too lazy to revert to 6.0.1 to see if that solves the issue since I just did a clean install of 7.1.1 about 2 days ago...
What count is the battery temperature not the ambiant one. You can use "cool tool" or wharever app to display that. If you're rooted you can even check the health file I mentionned (to see if it's Cool or even Cold from the model perspective).
The are linked by discharge rate.
The theorical unusable capacity will increase at low and high temperature but also with discharge rate. So if you are at these extreme temperatures, you could try to lower the discharge rate as much as you can by disabling all what you don't need (sync, lte).
Anyway at -23 degres ambiant your battery was maybe at -10 which is outside of its theorical range. We don't know the practical performance at these temps. I'll have to check again to confirm the low temp threshold at which the SOC is not calculated (think 5 degres that is ambiant 0 or -5). Could be that the battery is ok but the software lacks a lookup table at these ranges. There could be a reason. Anyway, I would try to preserve the battery from these temp if you can.
I have the same issue - but in +3 or +4C degrees. The battery went from 60% to zero in 15 min.
NotEnoughTECH said:
I have the same issue - but in +3 or +4C degrees. The battery went from 60% to zero in 15 min.
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Click to collapse
Ambiant or battery temperature? If the former, you'll need to know what the battery temperature was. That's the only thing that matters here. I guess you were talking about ambiant so the device once switched on could be at like 8 degrees so I'm surprised about your results.
I use Cool Tool but you can also use any other app like... Battery. What's relevant is battery temp AND battery health (Good, Cool, Cold ).
I've just put my phone in the fridge for some testing. Should be around 4 degrees also
Related
First, I know there are tons of GPS tests, but all of them seem to focus on the extreme accuracy and less on the casual driving GPS experience. So I thought of making a small test and by doing this, I also discovered solutions to some existing unanswered questions. This is a subjective test, made by someone with some knowledge on the subject, but I am not an expert or anything close to that.
1. The test was made during an 800Km trip. 400km were done on the way "there" during the day and 400km on the way back in the evening. I used 2 GPS software packages: coPilot and iGo MyWay for Android. Both purchased. I also used 2 chargers, a cheap charger with 1x500mA and a more expensive one with 2x500mA USB ports. All the findings below were not influenced at all by the software used.
Now come the findings in a list:
a) Accuracy - I had absolutely no issues with accuracy. My position was fixed on the road even in dense urban areas with tall buildings. Initial fix took maybe 1 minute and there were 0 problems after that. Both coPilot and iGo performed really well, even at tight roundabouts.
b) Phone temperature while charging and using GPS - this is a bit more complicated to explain. First, I used a generic phone/PDA holder. For the first few KMs I drove with the phone held firmly in place. Outside temperature was 26-28 degrees and inside was 22 degrees. Clear skies with the sun shinning all day long.
Now, on my first few kilometers I encountered the all-to-common issue of overheating. My battery got to a temperature of about 54-56 degrees C and it would stop charging. The back of the phone was VERY hot all around the camera. So I started playing around to see how I can fix the issue and found a few "tricks":
- I tried to leave a small gap between the phone and the back of the holder (5mm). This lowered the temperature by A LOT! After doing this, the phone battery never went above 51 degrees.
-I then switched to Night Mode on the GPS software. This also lowered the temp by 2-3 degrees to around 48.
- After that I tried to place a piece of paper over it, protecting the phone from direct sunlight. Result, temperature never went above 46 degrees while charging.
- As another small note, I noticed that the battery gets hotter if it is fully charged or close to it. The difference was about 2 degrees between 90% charge and 50% charge.
Also, with the cheap charger I could not get the phone under 50 degrees, with the expensive charger I got at least 2 degrees lower on the temp display in similar conditions.
c) Loosing charge while charging - I used normal car USB chargers rated at 500mA per port. While the battery temperature was under 52 degrees, I never lost charge, it actually charged slowly (1% every 10 minutes or so). If the temperature goes above 52, I start to loose charge even though the phone still shows that it is charging. I think there is a self-protect mechanism that blocks the battery from charging when it is too hot.
Conclusions (after doing many combinations and seeing the difference in temperature): the phone is great for a GPS system if you follow a few pointers:
- Never cover the back of the phone. You should always have a small space there so the phone can cool itself. (very important, 3-5 degrees difference)
- try to protect the phone from direct sunlight... Being black it absorbs a lot of heat. (important, 4-5 degrees difference)
- use a good charger and not a cheap one. (important , 1-2 degrees difference)
- try to leave it on battery until your charge level reaches 50-60% and then plug it in. (less important , 1-2 degrees difference)
- use Night Mode, if possible (less important , 1-2 degrees difference)
On my way back, when the sun was down, I never got above 50 degrees no matter what I did.
Also, iGo seemed to use a lot more resources than coPilot. While on battery alone, I was loosing charge about 1.5 times faster.
* battery temperature was measured by "Battery Status" app. The readings were verified using the not-so-scientific method of touching the back side of the phone and "feeling" how hot it was
Great post. Kind of spooky how temperamental the phone gets when it's hot; especially because it gets hot so easily. I've got a Case-Mate double-layer Tough Case on mine. I was thinking while I was putting it on there could be issues with heat dissipation. Your test makes me wary. Thanks for providing so much detail.
Had my sat nav on for around 3hours none stop today and my phone never gets hot. I use official Samsung case and the gps in the phone is better than any phone I've tested. Very happy indeed.
Sent from my GT-I9100 using XDA App
Good post and info therein.. Thank you.
Thanks!
L.
vimto25 said:
Had my sat nav on for around 3hours none stop today and my phone never gets hot. I use official Samsung case and the gps in the phone is better than any phone I've tested. Very happy indeed.
Sent from my GT-I9100 using XDA App
Click to expand...
Click to collapse
Where did you get the original Samsung car holder? Cause I wanted to buy it too but it will only appear on June.
As another note, do not waste your time and money by buying Clingo holders for this phone. The sticky surface does not stick to the back of SGS2 properly due to the texture of the back-plate. Your phone will fall after a few mins at the slightest bump on the road.
Thanks for the info!
One thing to mention and I think it's CRUCIAL.
The gps is a sirf star4 I think and I presume it behaves similar to older sirf chipsets.
So, most important thing.
For walking it may not be ok. On old smartphones using sirf star3 chipsets you needed to disable static navigation inside the chipset. There were ceratin programs that did this, I have not found anything for android yet. The thing is if you'r moving very slowly it keeps the position in place. If you get an inital lock 20 meters from your actual position it will remain there unless you move more than 40m meters or smt. It's very good for driving so the position does not jump around but very bad for walking. I think there will be software available soon to correct this.
And second, as older sirf star chipsets it takes much longer o connect, but once connected the signal is strong and stable in most situation. On sgs 1 you get a much faster lock (if you fixed your gps antenna that is , it reports better accuracy (5 meters vs 10-20 on sirf) and even SNR on satelites seems better. However actually driving with it gives much worse results.
Another thing i noticed is that the gps drains the battery much faster than on sgs1
So all in all I am satisifed with the gps on sgs 2. It's not as fast in locking as the first (with internet connection off) but it gets a much more stable lock and more precise.
Just tried to use a vent holder for the phone... temperature stayed at 32 degrees with AC set on 22 degrees auto. So vent holder is the way to go if you want to keep the phone cool.
Ive done a few tests with co pilot and my tracks and samsung really did nail the gps this time-it really is good. I find it strange that op said about a minuet to lock on-mines always 10 sec max cold start.
My initial cold start lock time is way more than 10 seconds ( never got under 20 seconds )... but that is influenced by a lot of factors: weather, objects around you like buildings or tall trees, the country you live in and the time you try to get a lock ( depending on how many satellites you have over you at a given time ). Still, lock time is less important, accuracy over a lengthy period of time is what I think is important.
Azra2k said:
First, I know there are tons of GPS tests, but all of them seem to focus on the extreme accuracy and less on the casual driving GPS experience. So I thought of making a small test and by doing this, I also discovered solutions to some existing unanswered questions. This is a subjective test, made by someone with some knowledge on the subject, but I am not an expert or anything close to that.
1. The test was made during an 800Km trip. 400km were done on the way "there" during the day and 400km on the way back in the evening. I used 2 GPS software packages: coPilot and iGo MyWay for Android. Both purchased. I also used 2 chargers, a cheap charger with 1x500mA and a more expensive one with 2x500mA USB ports. All the findings below were not influenced at all by the software used.
Now come the findings in a list:
a) Accuracy - I had absolutely no issues with accuracy. My position was fixed on the road even in dense urban areas with tall buildings. Initial fix took maybe 1 minute and there were 0 problems after that. Both coPilot and iGo performed really well, even at tight roundabouts.
b) Phone temperature while charging and using GPS - this is a bit more complicated to explain. First, I used a generic phone/PDA holder. For the first few KMs I drove with the phone held firmly in place. Outside temperature was 26-28 degrees and inside was 22 degrees. Clear skies with the sun shinning all day long.
Now, on my first few kilometers I encountered the all-to-common issue of overheating. My battery got to a temperature of about 54-56 degrees C and it would stop charging. The back of the phone was VERY hot all around the camera. So I started playing around to see how I can fix the issue and found a few "tricks":
- I tried to leave a small gap between the phone and the back of the holder (5mm). This lowered the temperature by A LOT! After doing this, the phone battery never went above 51 degrees.
-I then switched to Night Mode on the GPS software. This also lowered the temp by 2-3 degrees to around 48.
- After that I tried to place a piece of paper over it, protecting the phone from direct sunlight. Result, temperature never went above 46 degrees while charging.
- As another small note, I noticed that the battery gets hotter if it is fully charged or close to it. The difference was about 2 degrees between 90% charge and 50% charge.
Also, with the cheap charger I could not get the phone under 50 degrees, with the expensive charger I got at least 2 degrees lower on the temp display in similar conditions.
c) Loosing charge while charging - I used normal car USB chargers rated at 500mA per port. While the battery temperature was under 52 degrees, I never lost charge, it actually charged slowly (1% every 10 minutes or so). If the temperature goes above 52, I start to loose charge even though the phone still shows that it is charging. I think there is a self-protect mechanism that blocks the battery from charging when it is too hot.
Conclusions (after doing many combinations and seeing the difference in temperature): the phone is great for a GPS system if you follow a few pointers:
- Never cover the back of the phone. You should always have a small space there so the phone can cool itself. (very important, 3-5 degrees difference)
- try to protect the phone from direct sunlight... Being black it absorbs a lot of heat. (important, 4-5 degrees difference)
- use a good charger and not a cheap one. (important , 1-2 degrees difference)
- try to leave it on battery until your charge level reaches 50-60% and then plug it in. (less important , 1-2 degrees difference)
- use Night Mode, if possible (less important , 1-2 degrees difference)
On my way back, when the sun was down, I never got above 50 degrees no matter what I did.
Also, iGo seemed to use a lot more resources than coPilot. While on battery alone, I was loosing charge about 1.5 times faster.
* battery temperature was measured by "Battery Status" app. The readings were verified using the not-so-scientific method of touching the back side of the phone and "feeling" how hot it was
Click to expand...
Click to collapse
Great stuff! The given details are very clear and informative. Its really helpful information, thanks for sharing the valuable info.
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Another method I am using to lower temp and Battery loss is to fix it to 800Mhz while navigating, depends of course on the navigation software but sometimes even 500Mhz is enough.
Everyone should try if its ok with his nav-software, I felt no stutters on 800Mhz^^
I checked my battery monitor widget today am noticed something very strange. It showed me 40% charged when I was sure it was only 35% charged before I went bed! WTF did it charge itself? As you can see from the screenshots the phone was not on charge and was awake for most of the night which has never happened before. I have not installed any new apps in the last few days I have never seen this before on any of my android phones over the years. After 1 month of using the note this is the first glitch i've noticed (if it is a glitch). I am on stock LA4.
Anyone have any ideas as to why this happened?
I'm not complaining ( wish it happened every night!) just curious.
I have noticed the same strange thing with ICS.
did you try pinching your arm?
/Jeriz
It is probably/maybe your battery stats that was not exactly "right" and might "recalibrate" your battery stats to the true value.
The simplest answer is always the true one: It is having trouble reading your battery right. Happens with mine too sometimes.
LOL I had the same thing happened to me.
First day with my note. And so far I am loving it.(despite colour rendering issues , and a very lagging stock keyboard)
Sent from my GT-N7000 using xda premium
Maybe the phones are evolving and learning to use the sensor on the Front to charge itself lol
Sent from my Galaxy Note
This has happened to me several times already since the Galaxy S days.. sometimes after a reboot the battery looses 50% and slowly charges back up its quite funny and strange, never happened to my note though.
What do you think happens if some of the services is not needed anymore and stopes relaying,the battery % estimation will go up.
georgios73 said:
I checked my battery monitor widget today am noticed something very strange. It showed me 40% charged when I was sure it was only 35% charged before I went bed! WTF did it charge itself? As you can see from the screenshots the phone was not on charge and was awake for most of the night which has never happened before. I have not installed any new apps in the last few days I have never seen this before on any of my android phones over the years. After 1 month of using the note this is the first glitch i've noticed (if it is a glitch). I am on stock LA4.
Anyone have any ideas as to why this happened?
I'm not complaining ( wish it happened every night!) just curious.
Click to expand...
Click to collapse
Mine charged itself too.
Went from 30% to 50% when I was out.
I thought it has some solar panel hidden beneath.
hagba said:
What do you think happens if some of the services is not needed anymore and stopes relaying,the battery % estimation will go up.
Click to expand...
Click to collapse
Wtf are you talking about? That's not any kind of estimate of lifetime, that's a report on amount of energy left. And in this case, specifically, a bug in it's reading.
Livewings said:
Mine charged itself too.
Went from 30% to 50% when I was out.
I thought it has some solar panel hidden beneath.
Click to expand...
Click to collapse
That one a good idea. Smartphone company should consider to put it in every phone in future..lol
Sent from my GT-N7000 using XDA App
When I saw this thread, I immediately opened my battery stats only to see this:
lulz
Viamonte said:
Wtf are you talking about? That's not any kind of estimate of lifetime, that's a report on amount of energy left. And in this case, specifically, a bug in it's reading.
Click to expand...
Click to collapse
You need to review your facts make a bit more research, the report is based on the fact that how many apps and services are you using,say if the wifi is on, it will show you certain %, however if you turn it off will report you that it has increased, depending on the running apps and services how much battery is left, my laptop does it all the time,unless you are living in pre Smart Battery Meter era.
I have to agree that if the % relies on the voltage (as I am sure it must do to some extent, but I am only guessing), stopping heavy services will allow the voltage to increase and the app may see that as a gain.
Alternatively we have discovered Samsung's secret OTA charging method! This explains why some phones have terrible battery life, they are being sucked dry by nearby 'Vampire Notes'!
Now, if we could just work out how we could charge all Notes by sucking iPhones dry ....
turshija said:
When I saw this thread, I immediately opened my battery stats only to see this:
lulz
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Mega wtf. :O
Sent from my GT-N7000 using xda premium
Battery is trolling
The Galaxy Note battery is a three terminals battery. So I think that the % state of charge of this battery is directly calculated from its output voltage.
The voltage decrease as the charge decrease, so it is possible to evaluate the residual charge in the battery.This is not a very precise method but it is quite simple to implement.
After a high current drain there is what is called a ''voltage recovery'', the battery voltage increase slowly a little bit as the current is stopped. So you may think that the battery get back energy, but unfortunately it is only an artifact.
Yesterday I showed you all how my battery indicated that it had charged itself.
So guess what folks today when I checked the complete opposite happened!!
Again as you can see it went from 48% just before I went to sleep only to wake up to a dead phone (switched off). Upon rebooting it showed only 9% !!
Now I can cope with it going up but going down is not good.
Hope its not a hardware problem and just a faulty battery.
lets see what happens tomorrow maybe it will explode!
I'm an EE (election engineering) student. Michel_7 is right. Lithium ion batteries experience a voltage sag during high current draws. Afterwards there is some rebound, both as the battery cools if over temp, and with a period of lower activity. This is in part due to the fact that batteries have internal resistance, and as they supply power, they also dissipate some internally. This is of squared proportion to the current drawn. IE current^2 * resistance. Battery resistance constant, so the more power the phone uses, the more the battery does. This is what heats up the battery.
Sent from my GT-N7000 using xda premium
Im a wireless technician and when I need to climb a tower I tend to leave my phones in the truck (work phone is a S2). After a couple of hours of the phones being in sub zero temperatures, the Atrix loses about 60 to 80 percent of battery. Well, thats what the OS is telling me. It will continue to work throughout the day at 1 percent. If I charge it from that point forward it wont charge past 70 to 90 percent. Depending on how long I used it at 1 percent. Only way to fix it is remove the batter after it has been in the charger all night and put it back on once the question mark is there. And I need to do this almost every night. If I leave the phone for 30 minutes it might drop 10 to 20 percent. But just enough to mess up.
This doesnt happen with the S2. It does drain faster but it is not noticeable. Anyone else notice this? Oh and my Atrix messes up big time in the humidity so I have something to look forward to this summer.. I doubt the phone will last long enough to get ICS.
And something else I noticed. After I pick up the phone after it has been in the cold for a couple hours I will check SetCPU to see what my cpu temperature is at. I have never seen it below 18 C. Makes me wonder how accurate it actually is. If the phone is room temperature at idle, my CPU temp will be 39C. I bet it is actually only at 25 to 30 C.
I first saw this behavior when I took my Atrix camping in December. The phone was at 95% when I turned it off at night, and in the morning when I turned it on, it was at 40%. Another guy camping with us had an iPhone with a similar drop, but I don't know what his percentages were.
This weekend I was in Utah skiing and fully experienced what you are talking about...the phone was on the charger all night and it would only go to 70%. I pulled the battery and after the restart it was at 99%. This was in my heated hotel room and not outside.
I think the cold weather in general causes batteries to go crazy. Have a read:
http://batteryuniversity.com/learn/article/discharging_at_high_and_low_temperatures
I have the exact same thing happen to me as the OP and it has been happening for a long time even after i got a refurbished atrix so it is definatly something to do with the battery and not the phone itself. Damn cold Canadian winters
Sent from my MB860 using xda premium
Ratchet556 said:
I have the exact same thing happen to me as the OP and it has been happening for a long time even after i got a refurbished atrix so it is definatly something to do with the battery and not the phone itself. Damn cold Canadian winters
Sent from my MB860 using xda premium
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Click to collapse
Hey we can't complain. Its very mild, well here anyways. And I love wasaga. Best may long weekend place to go!
And as far as the issue.. I have noticed it with my iPhone but once charged it was always go to 100 percent. Sucks that ours really messes up.
There is a wealth of information about lithium ion batteries if you look for it. They perform better in colder temperatures. They self-discharge slower in colder temperatures. Their lifecycle degrades slower in cold temperatures.The only real drawback is that the need to be warm to pass full current, so an extremely cold battery might not power your device properly until it warms slightly. If you let your battery discharge all the time it will severely decrease it's lifecycle, as lithium ion does not cope well with this.
NASA requires that their lithium ion batteries perform to -80C.
Remember that the batteries also have protection circuitry for safety. This may be set up in the Atrix batteries to discharge rapidly under certain circumstances.
I believe you can get a rapid discharge though if you go from an extreme cold temperature to a very warm temperature quickly, which could be the case if a phone sits in a truck all day at sub-zero temps, then you jump in, start it up, and start cranking the heat.
http://batteryuniversity.com/
Never had that happen.
Had the temp down to 12 C on the phone.
It did get a little hot during the summer months.
g2tegg said:
Hey we can't complain. Its very mild, well here anyways. And I love wasaga. Best may long weekend place to go!
And as far as the issue.. I have noticed it with my iPhone but once charged it was always go to 100 percent. Sucks that ours really messes up.
Click to expand...
Click to collapse
Living here you come to know that May long weekend is the WORST time of year because the majority of tourists are jerks! Fun to watch them get arrested though Right now its cold as hell. And yea it kinda of sucks, no matter what i do i can't make it read 100% it just goes up to that on its own sometimes. One time i had my battery last 3 hours sitting at 1%.
Sent from my MB860 using xda premium
I've had my atrix shut off on me while skiing a few times. Get home and plug it in and it has plenty of juice...just cant push out enough current to power the phone properly.
My phone sits in my work truck all day (since its not intrinsically safe) and even when the temp is well below zero it never fails to come off the vehicle dock without a full charge just that sometimes it thinks 40% or 70% is a full charge fixed it pretty much the same way as you guys described. Other than that in low temps the touch screen responsiveness is sometimes an issue and ocassionally the external sd card wont show up until it warms up. but overall a reliable phone considering the abuse it takes. wonderfull build quality from motorola as usual.
However... I think heat is a bigger issue as I managed to melt my first vehicle dock this summer when it hit 34C in Calgary. The suction cup and part of the stem remained on the windshield but luckly the phone fell to the floor in the shade.
Really surprised I haven't seen any pix of melted atrix on the internet unlike the S2 & Iphone4
I just got my Nexus 7 two days ago and I'm worried about the battery temperatures that I'm getting. When I haven't used it for several hours the temperature is usually 75-85 °F, but after general use (Facebook, Chrome) the temperature increases to over 90°F. Right now it's at 92.8°F after less than an hour of general use. Playing games makes it get even hotter, as you can see in the pictures I attached.
It's also mainly on the bottom left side that gets noticeably warm, I feel like it shouldn't be this warm already. I saw a few people had similar issues, are these temperatures out of the normal range or am I worrying for nothing?
mcthefresh said:
I just got my Nexus 7 two days ago and I'm worried about the battery temperatures that I'm getting. When I haven't used it for several hours the temperature is usually 75-85 °F, but after general use (Facebook, Chrome) the temperature increases to over 90°F. Right now it's at 92.8°F after less than an hour of general use. Playing games makes it get even hotter, as you can see in the pictures I attached.
It's also mainly on the bottom left side that gets noticeably warm, I feel like it shouldn't be this warm already. I saw a few people had similar issues, are these temperatures out of the normal range or am I worrying for nothing?
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battery temp isnt an idicator of your cpu temp. the n7 has a cpu temp option used by some apps(like trinity kernel toolbox) to show cou temp. btw, its normal for the cpu to go to 60C+ cpu temps on a hot day or during heavy use. anyways, did you realize that the human body averages around 98.6F? so, id even say that your battery is still fairly cool. while charging and using your n7, it would be normal to see battery temps around 110F or slightly higher. oh, and your cpu temps safety is at 100C, itll shutdown automatically if that tempurature is reached.
Hello, what is the normal temperature for s8 when not using and when actively using it? Mine is around 30 degrees when I unlock it after not using for 10-15 minutes, and 35-37 when actively using (music, browser, etc). Is that ok?
First of all what is your ambient temperature? Secondly is this your CPU temp or batt. temp? Under heavy load CPU can go up to 70-90C before it starts throttling, battery shouldn't go much above 40-45C, but if you live in Las Vegas or Phoenix, this is how hot it gets outside, so phone will reach those temp even when shutdown, if you leave it outside.
pete4k said:
First of all what is your ambient temperature? Secondly is this your CPU temp or batt. temp? Under heavy load CPU can go up to 70-90C before it starts throttling, battery shouldn't go much above 40-45C, but if you live in Las Vegas or Phoenix, this is how hot it gets outside, so phone will reach those temp even when shutdown, if you leave it outside.
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Thank you foe explaining, Battery temperature is 37 when I amactively using phone. I live in Moscow, right now we have around 5 degrees Celsius. Don't know how to get cpu temperature.
I would imagine you're using your phone inside a house, with temp. probably around 20-25C. Now I looked at battery statistics on my phone and it seems my phone's battery never went above 40C in the past 2 weeks. I don't think 37C you got is something to worry about yet, but if your battery is 30 even at idle inside of 20-25C room??, you may want to look into why your phone is running, when you're not using it. Another possibility is that your temp. sensor is miscalibrated and it shows little high. In other words, when your phone is not being used, it should be in deep sleep mode and battery should be withing couple degrees your room/ outside temperature, depending where you are.
pete4k said:
I would imagine you're using your phone inside a house, with temp. probably around 20-25C. Now I looked at battery statistics on my phone and it seems my phone's battery never went above 40C in the past 2 weeks. I don't think 37C you got is something to worry about yet, but if your battery is 30 even at idle inside of 20-25C room??, you may want to look into why your phone is running, when you're not using it. Another possibility is that your temp. sensor is miscalibrated and it shows little high. In other words, when your phone is not being used, it should be in deep sleep mode and battery should be withing couple degrees your room/ outside temperature, depending where you are.
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Can you please advice any app to see what's running when phone is in deep sleep? I have a custom Rom, and I noticed increase of temperature after last update (or maybe I installed some root software that causes it)
Mine does not seem to heat up much at all, it is about room temp while playing games and what not. S8+ ATT
Do you have root? if yes, wakelock detector should show you what is keeping your phone waking up.
If not, 3C tools has whole suite of applications including nice battery manager, it keeps log of your battery charge/ temp etc every 10min, there is apps manager etc.
Have 2 days s8, same settings usage than my s7edge, and it's getting hot, I don't know the previous update, because i update and reset before use the phone.
But with Bluetooth on link to the car, and reading already went to 41 degrees its to much compared to s7.
Maybe I need to change it.