Database Users

GS2 bug VERY slow charging and hot phone

i did not see a topic about VERY slow charging and hot phone issue
first of all, typically for 10% it takes me 3 hours to fully charge my GS2, and it is warm but not hot
randomly it seems to get a bug that makes the phone charge VERY slow like 15% an hour or total 6 hours, and at the same time the phone is much hotter than normal charging
i had Android Assistant running and here is what is normal idle system spec:
CPU
system 2%
user 5%
idle 93%
ram
used 329MB
free 507MB
battery temp 97F
when the bug occurs i go to the stock task manager, close all apps, and clear ram memory, and here are the system specs after:
CPU
system 20%
user 40%
idle 40%
ram
used 460MB
free 377MB
battery temp 114F
i have not been able to isolate the process/app/bug anyone else?

I use Watchover (freely available on the market), which can give you a list of processes and the percentage of CPU they use. You can then identify the processes that eat the most of your CPU.

It's not a bug but a feature
The phone takes about 3 hours to charge when no apps are running.
More, if apps are running and even more if you are using the phone.
Totally normal for this type of phone/battery.
So if you want it to charge as quickly as possible make sure as little as possible is taking power....

David Roosendaal said:
It's not a bug but a feature
The phone takes about 3 hours to charge when no apps are running.
More, if apps are running and even more if you are using the phone.
Totally normal for this type of phone/battery.
So if you want it to charge as quickly as possible make sure as little as possible is taking power....
Click to expand...
Click to collapse
but i stop all APPs in task manager and even clear my ram cache, so technically it should be like idle with nothing running
and yet it shows 60% CPU usage and 100MB or ram used somewhere, no idea where

colonels said:
but i stop all APPs in task manager and even clear my ram cache, so technically it should be like idle with nothing running
and yet it shows 60% CPU usage and 100MB or ram used somewhere, no idea where
Click to expand...
Click to collapse
OS Monitor from market to check what is eating the cpu.
Sent from my GT-I9100 using XDA App

Doesn't clicking on battery usage show the same thing.
Do the other apps do something different.
Sent from my GT-I9100 using XDA App

zoro25 said:
Doesn't clicking on battery usage show the same thing.
Do the other apps do something different.
Sent from my GT-I9100 using XDA App
Click to expand...
Click to collapse
this shows total usage between 100% charges of battery, so what might be the highest CPU % usage might not be what is currently stuck in a feedback loop
i want to see what process or app is "stuck" in a loop or on cycle that is causing the slow charging and hot phone bug
when i stop all apps in task manager and clear ram (which usually kills 19 processes in the background) i should be at 90%+ idle
i need an app that can show me a snapshot of what is running on demand and doesn't show what was running before but was stopped

What does the battery usage screen tell you? After trying to charge, unplug the phone and leave it for 30 minutes. Then open up the battery usage page and check which item is consuming battery power.

my phone was getting hot when i was using custom kernel and had overclocked
check your kernel first

colonels said:
i want to see what process or app is "stuck" in a loop or on cycle that is causing the slow charging and hot phone bug
Click to expand...
Click to collapse
OS Monitor will tell you in real time which process is using up CPU cycles. However, battery usage shows you which app/process is using up the battery, which is what is happening to your phone. It is using up battery charge as fast as the charger is able to charge it. So check out which app has the highest percentage battery usage. If it is Android OS, then you will have to use OS monitor to dig deeper to pin point which Android OS process (there are many) is causing this.

so i identified the problem!
it is HANDCENT SMS (MEDIUM) WIDGET even though i do not have that widget loaded on any of my home screens
this gets somehow bugged and starts to use 30-40% CPU real time, and even after i force-close the process it comes right back in a few seconds
i have uninstalled HANDCENT SMS and my idle is back to 90%
i bet if you have the SLOW CHARGING HOT PHONE bug it is because of this widely popular SMS app, i am going to try GO SMS instead

Hi. I searched the forum for this problem. Just got an GSII three days ago. Experienced this a problem few minutes ago. Started charging my phone when I got home. It was at 36% at 46deg c. Then I talked to my friend on the phone. Checked back 30 mins later and it was at 33% at 53 deg c. It was the hottest the phone was ever. I panicked and unplugged it and shut the phone down. Turned it on 5 mins later and I just plugged it now.
Is my unit faulty?
Log when I plugged my phone into the charger until it reached 53 deg c:
2011/08/22|21:57:26|-678mA|35%|3810mV|41.0ºC|2|2
(must be when I plugged)
2011/08/22|22:02:26|58mA|36%|3762mV|46.0ºC|2|1
2011/08/22|22:07:26|-20mA|35%|3757mV|48.0ºC|0|1
2011/08/22|22:12:26|-165mA|35%|3703mV|50.0ºC|0|1
2011/08/22|22:17:26|-165mA|35%|3752mV|53.0ºC|0|1
2011/08/22|22:22:26|-165mA|35%|3752mV|53.0ºC|0|1
2011/08/22|22:27:26|-55mA|34%|3753mV|53.0ºC|0|1
2011/08/22|22:32:26|-55mA|34%|3768mV|53.0ºC|0|1
(unplugged, I shut phone down)
(booted up phone when it cooled and plugged charger again)
2011/08/22|22:46:18|-1mA|33%|3682mV|34.0ºC|1|0
2011/08/22|22:47:07|-1mA|33%|3726mV|34.0ºC|1|0
2011/08/22|22:52:07|-1mA|33%|3891mV|42.0ºC|2|2
2011/08/22|22:55:07|372mA|35%|3882mV|44.0ºC|2|1
2011/08/22|23:00:07|758mA|37%|3897mV|44.0ºC|2|1
2011/08/22|23:05:07|494mA|40%|3888mV|46.0ºC|2|1
2011/08/22|23:10:07|428mA|42%|3893mV|46.0ºC|2|1
2011/08/22|23:13:07|439mA|42%|3842mV|46.0ºC|1|1
2011/08/22|23:18:07|610mA|45%|3925mV|46.0ºC|2|1
2011/08/22|23:21:07|824mA|46%|3893mV|46.0ºC|2|1
2011/08/22|23:26:07|428mA|48%|3923mV|46.0ºC|2|1
2011/08/22|23:31:07|328mA|50%|3908mV|46.0ºC|2|1
2011/08/22|23:36:07|627mA|53%|3954mV|46.0ºC|2|1
2011/08/22|23:41:07|494mA|55%|3946mV|46.0ºC|2|1
EDIT: It's back to charging normally now. Temp at a stable 46deg c.

When I didn't rooted my phone, I also was experiencing overheating. Once I´ve rooted the phone and undervolted the phone and used kernel from Solarflare. Since then my phone didn´t overheat.

I wish we had a cpu temp reading as well as the battery temp one, I suppose the cpu usage will have to do, I think most overheating and slow charging is caused by power being used my the cpu as you charge the battery, some fault apps in conjunction with the heat of the battery produces when charging, really starts to heat things up.

Tinderbox (UK) said:
I wish we had a cpu temp reading as well as the battery temp one, I suppose the cpu usage will have to do, I think most overheating and slow charging is caused by power being used my the cpu as you charge the battery, some fault apps in conjunction with the heat of the battery produces when charging, really starts to heat things up.
Click to expand...
Click to collapse
I was just going to point this out as well. The same is true for a laptop. Recharging the laptop with the laptop power off will still generate some heat near the battery, but the moment you turn it on and start checking email, watching youtube, and doing all kinds of other stuff, core temps are going to be higher than usual as the battery charging heat adds on to it. So, I wouldn't be overly concerned with the overheating part just as long as it on a open surface like your desk and not wrapped up in a blanket on your bed.
With regards to the slow charging, that will directly be related to how much you use the phone, number of currently running apps, and number of background apps running (syncing, etc). I strongly suggest putting the display brightness level to lowest setting when at home while charging since this is the single largest consumer (50%) of battery power compared to anything else for me. If you do find that there are some less responsive apps stealing cpu cycles when it shouldn't, then I would consider uninstalling it altogether as it probably is also reducing your battery life during the day.

Thanks for the replies. I know the SII has a tendency to work up some heat and I'm just worried about damaging the internals. Does anyone know though what the maximum operating temperature is? So I could monitor my phone or turn it off when it reaches a certain temperature. I tried contacting Samsung about this but they didn't reply (their CS is bad in my country).

prinzhernan said:
Thanks for the replies. I know the SII has a tendency to work up some heat and I'm just worried about damaging the internals. Does anyone know though what the maximum operating temperature is? So I could monitor my phone or turn it off when it reaches a certain temperature. I tried contacting Samsung about this but they didn't reply (their CS is bad in my country).
Click to expand...
Click to collapse
same thing, i kinda worried with the internal parts, if it going too hot every time. Even only using wifi for browsing, it made a heat that really annoying

endoaja said:
same thing, i kinda worried with the internal parts, if it going too hot every time. Even only using wifi for browsing, it made a heat that really annoying
Click to expand...
Click to collapse
Yeah. I'd really like to know if it's okay that it gets hot a lot and at what temperature the internals get toasted. The manual says nothing about it.
Sent from my GT-I9100 using XDA Premium App

I would say 46c when charging is way too hot, Im even finding 41c already above the expected charging temperatures.

I have noticed Kernels having a lot to do with strange battery drain and overheating. I flashed back to a stock Australian Carrier Firmware and as soon as my phone restarted it was getting hot. I could feel it burning through the back and front of the phone. I flashed another kernel and the problem went away.

Normal operating temperature for Nexus 7? (overheating?)

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?
Click to expand...
Click to collapse
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.

Nexus 6p Cold bug

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?
Click to expand...
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'?
Click to expand...
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'?
Click to expand...
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

Overheating problem on one plus 5 ?

So, I noticed that When gaming (especialy with game offering 60 Fps mode) the phone will freeze and then goes into reboot even when played on cold room
from CPU temp apps, it seems when the temperature hit 40 centigrade. the phone shut down
Anyone else have this kind of problem ?
is bellow 40 centigrade is the safe limit for this phone ?
for all its awesome spec it kind restrictive for use gaming

This is by far the coolest device I've ever owned, no heat no matter what I throw at it. What does your setup look like? (ROM, kernel, etc.)

Its basicly stock one. since I just got it 2-3 days ago
Im testing it to run some CPU intensive games (60fps)
when the temperature reach 40 centigrade. it shut down
on normal usage it is quite cold.
but it seems the thermal threshold were quite low, my old HTC might also throttled down at 40 centrigade
but it dont shut down until 50 or 51 centrigade.
1+ 5 dont thorrtled but instead goes straight into shutdown
my country ambient temperature were quite high due to located near equator (30 centigrade avg, with 35 centrigade being common on daylight)
so without air conditioned room, I found it can become overheated - rather quickly

only had overheat problems using camera related chat apps (kik) and in 110 Fahrenheit degrees in CA USA

humustz said:
Its basicly stock one. since I just got it 2-3 days ago
Im testing it to run some CPU intensive games (60fps)
when the temperature reach 40 centigrade. it shut down
on normal usage it is quite cold.
but it seems the thermal threshold were quite low, my old HTC might also throttled down at 40 centrigade
but it dont shut down until 50 or 51 centrigade.
1+ 5 dont thorrtled but instead goes straight into shutdown
my country ambient temperature were quite high due to located near equator (30 centigrade avg, with 35 centrigade being common on daylight)
so without air conditioned room, I found it can become overheated - rather quickly
Click to expand...
Click to collapse
Might be a bit of an extreme solution but try doing a factory reset and see if that helps. If not, contact OnePlus support and see if you can get an RMA started. I say that because my device stays cool even on the hottest days of where I am.

rickysidhu_ said:
Might be a bit of an extreme solution but try doing a factory reset and see if that helps. If not, contact OnePlus support and see if you can get an RMA started. I say that because my device stays cool even on the hottest days of where I am.
Click to expand...
Click to collapse
I agree with the RMA solution, something isn't right because I can do anything on this phone and it never gets hot. Even when it's 99 degrees Fahrenheit with 70% humidity here in Ohio.
I've done some seriously intensive gaming and crap on this phone, and I cannot get it to overheat.

The snapdragon 835 is the coolest phone processor, you don't have any overheating issue, it must be something else. When you say 49° are you talking about the cpu, battery, skin temp?

Naprzod said:
The snapdragon 835 is the coolest phone processor, you don't have any overheating issue, it must be something else. When you say 49° are you talking about the cpu, battery, skin temp?
Click to expand...
Click to collapse
CPU temp record its 40 centrigade when device shut down
both battery and CPU were at similiar temperature (+- 2 degree)
rickysidhu_ said:
Might be a bit of an extreme solution but try doing a factory reset and see if that helps. If not, contact OnePlus support and see if you can get an RMA started. I say that because my device stays cool even on the hottest days of where I am.
Click to expand...
Click to collapse
Ill try both, maybe the unit I got somewhat defective

humustz said:
CPU temp record its 40 centrigade when device shut down
both battery and CPU were at similiar temperature (+- 2 degree)
Ill try both, maybe the unit I got somewhat defective
Click to expand...
Click to collapse
Cpu at 40° while gaming is really low, some phones hit 85°, of course they will throttle after that.

Naprzod said:
Cpu at 40° while gaming is really low, some phones hit 85°, of course they will throttle after that.
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Click to collapse
yeah. Thats why when the phone shut down after reach 40 centigrade.
its confusing since the thermal threshold should not be that low

same problem here
freez then reboot in heavy games
temperature around 40-50
factory reset doesnt help

Heating problem

My phone gets warm when charging (Only wifi was connected, I was not using the phone) or when I watch a movie for a long period of time. I'm using the charger given with the phone. It's the 3-32 (48MP) variant. I'm also using the plastic back cover given with phone. Is this normal? If not what's the solution?

don't panic it's totally normal

chazy chaz said:
don't panic it's totally normal
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Click to collapse
Also, I used the Stress test on Antutu Benchmark. At that time Battery temp was 42 degree Celsius and CPU temp sometimes spiked upto 71 degree for a second or two then dropping back to somewhere around 50 degree. Is this also normal?

you have to check which app is using that much CPU .. benchmark apps do stress the phone, but daily apps usually don't .. i found this afternoon that 2 apps (xiaomi framework and another one) use so much cpu so i removed them .. it improved my battery considerably