Database Info

[Kernel][EB13/EC05][Battery][Experimental] Tweaked Battery Charging Kernel

:[Disclaimer]:
Use this at your own risk!
:[Extra Disclaimer]:
This alters the way the Epic charges the battery.
Precaution has been taken to not exceed "normal" values, but when dealing with batteries (and their various sources and quality) there is always a chance something could go horribly wrong.
If you are in any way worried about this, then please move on, as this is not for you.
If you bought an extended battery off ebay and are worried your battery might explode, then please move on, as this is not for you.
This should be considered experimental, and only people who wish to experiment should use it.
There may come a time this will be incorporated into more (all?) kernels, but until then, you have been warned!
:[Requirements]:
Built for and tested on EB13 / EC05 EXT4.
:[Description]:
This is a tweak of the values that are used by the Epic to determine when the battery is at it's fully charged state, and when it should begin it's recharge state.
This is built on Bonsai 3.0.1
It includes the following: tun support, cifs support, 1.2GHz Overclock, autogroup scheduling, keyboard fix (thanks mkasick), video mode fix (thanks again mkasick), etc.
Thank you to all the devs who have contributed and I haven't listed (pm me).
I have also implemented nullghost's Idle timer from 2.6.34 thanks to ACS and nullghost.
[update]
I have also implemented the changes from the EC05 kernel, thanks to Rodderik.
And the scaling_available_frequencies sysfs interface thanks again to nullghost.
[update]
Attached source files for those who want them.
:[Features]:
Alters the "fully charged notification" to be more accurate.
Charges the battery to near full capacity.
Allows for less drain before the "recharge" kicks in.
Gives you a better chance at having a full charge when unplugging.
[update]
Provides over charge protection in the form of a max voltage cut-off.
Increased charge rates (mA) in both USB and AC modes.
There is a chance this change could cause fire or explosion!
Understand this is trial and error!
Even tho I've tested this for the past couple days, there is still a chance you will have a problem where I have not!
Especially if you use a charger other than a stock charger (rated at 0.7A)!
!!Again, you have been warned!!
Adjusted calculations for the fuel gauge (battery level percentage).
I have added a few kernel debug messages that can be seen using dmesg.
"OS Monitor" free in the market will allow you to view them (filter tag = [BATT).
:[What this does not do]:
This does not alter any of the following built in protections:
Max total charge time of 5 hours.
Max total recharge time of 2 hours.
Low battery voltage condition of 3400 (used for auto shutdown).
Low battery level condition of 0 (used for auto shutdown).​This does not change the charge rate (current coming from the charger).
So no, it wont charge your phone faster (well technically it does, but only during the higher voltages where you would normally be "recharging" on a stock kernel).
:[Recommendations]:
Go download the free app "Battery Monitor Widget". Go into the settings and make sure that "Monitor without widget" is enabled (checked).
The app has a really nice history feature that I find useful, and can be used to help track things with this kernel.
:[Details]:
From the code (original and older values commented out)::
(Some line numbers might be a little off, as I have added some debug messages.)
[Full charge and Recharge adjustments]
Kernel/drivers/power/victory/s5pc110_battery.h: Line 166
Code:
#define BATT_RECHARGE_COUNT [COLOR="Blue"]15[/COLOR]//20
Kernel/drivers/power/victory/s5pc110_battery.h: Lines 170 ~ 173
Code:
#define OVER_CHARGE_COND_VOLTAGE [COLOR="Blue"]4210[/COLOR]// nubecoder
#define FULL_CHARGE_COND_VOLTAGE [COLOR="Blue"]4190[/COLOR]//4170//4000
#define RECHARGE_COND_VOLTAGE [COLOR="Blue"]4150[/COLOR]//4140//4110 // 2010.05.08.
#define RECHARGE_COND_VOLTAGE_BACKUP [COLOR="Blue"]4090[/COLOR]//4110//4000
Kernel/drivers/power/victory/s5pc110_battery.h: Lines 184 ~ 185
Code:
#define CURRENT_OF_FULL_CHG [COLOR="Blue"]60[/COLOR]//90//91 // 2010.05.08.
#define CHG_CURRENT_COUNT [COLOR="Blue"]15[/COLOR]//20
Which means:
When voltage is greater than or equal to 4190(mV) and current is less than or equal to 60(mA), full charge has been achieved.
When voltage is below 4150(mV) or 4090(mV), recharge activates (what determines if "backup" is used a Samsung mystery).
The current and recharge count values are also somewhat of a mystery, I decreased them to have a bit more consistent charge behavior.
[Over charge protection]
Kernel/drivers/power/victory/s5pc110_battery.c: Lines 438 ~ 444 and 458 ~ 464
Code:
if (s3c_bat_info.bat_info.batt_vol >= OVER_CHARGE_COND_VOLTAGE) {
s3c_set_chg_en(0);//Set charge off
s3c_bat_info.bat_info.batt_is_full = 1;
force_update = 1;
}
Which means:
If voltage is greater than or equal to 4210mV stop charging.
[Increased charge rate]
Kernel/drivers/regulator/victory/max9889_function.c: Line 3092
Code:
reg_buff[0] = (0x0 <<5) |(0x3 << 3) | /*(0x5<<0)*/ [COLOR="Blue"](0x6<<0)[/COLOR] ; // CHG_TOPOFF_TH=10%, CHG_RST_HYS=Disable, AC_FCGH=600mA // ???mA
Kernel/drivers/regulator/victory/max9889_function.c: Line 3106
Code:
reg_buff[0] = (0x0 <<5) |(0x3 << 3) |/*(0x1<<0)*/ [COLOR="Blue"](0x3<<0)[/COLOR] ; // CHG_TOPOFF_TH=10%, CHG_RST_HYS=Disable, AC_FCGH=380mA // ???mA
Based on some rudimentary calculations this translates to:
Code:
AC: @320mA which translates to @704mA
USB: @249mA which translates to @548mA
Note:: This was tested with a stock cable and charger for AC, and a stock cable and a direct laptop port for USB.
For more information read this post.
[Adjusted fuel gauge (battery level percentage)]
Kernel/drivers/power/victory/fuel_gauge.c: Line 159
Code:
adj_soc = (((data[0]*10) - 15) * 100) / (/*950*/ [COLOR="Blue"]980[/COLOR] - 15); // hanapark_Atlas
Which means:
Instead of rounding 95% up to 100% round 98% up to 100%.
:[WishList]:
Fixing the battery percentage output to be more accurate. (Partially done, we'll see how it goes.)
Adjusting the values to what I feel is the best charging experience (while still remaining "safe").
Possibly(?) increasing the charge rate to enable faster charging.
:[Testing]:
This has been tested on an Epic 4G running Bonsai 4.0.0b2 with a stock battery.
This build has not been tested on an extended battery (yet).
:[Feedback]:
Please post your feedback, I'd like to know some of the values reported when full charge occurs, when recharge starts / stops, if you've noticed your battery keeps charge longer / less, etc...
[Download HERE]
Download no longer available...
:[Special thanks]:
jaronow, for initial testing.
:[ChangeLog]:
Code:
v0.0.2 (03-22-2011)
Attached current source files to this post.
v0.0.2 (03-22-2011)
Added over charge protection cut-off of 4210mV.
Increased full charge voltage to 4190mV.
Increased recharge cond voltage to 4150mV.
Decreased recharge backup cond voltage to 4090mV.
Decreased full charge current condition to 60mA.
Decreased charge current count to 15.
Decreased recharge count to 15
Increased charge rate for AC from an estimated 600mA to @ 704mA.
Increased charge rate for USB from an estimated 380mA to @ 548mA.
Adjusted fuel gauge to be more accurate.
v0.0.1 (03-16-2011)
Initial Release
=]

Guinea Pig Number #1 reporting for duty!!! My phone booted up ok and did not explode!
I am using the Midnight Rom 4.2 Byor Edition so far my phone has booted up ok. I am charging my phone right now as we speak. I will do benchmark speeds when my phone is done charge up fully. I wiped my partination cache and the Dilvke cache too. I am trying to get a full charge.

Sweet Awesome work bro 8)

is this just a kernal flash? can't see what the file is from work. also, is it still the bonsai kernal? so smart ass governor still an option?
is it relatively simple to jack up the charge rate? my friends iphone charges in like an hour or less. mine takes at least 3 hours. annoying to say the least.

removed root for me

What makes the smartass governor special.
Can I keep my phone on 1.2 GHZ and the smartass governor will only use as much power it needs to complete the task at hand or would I save battery life by putting my phone on 800 MHz or it does not matter? Great Rom Kernal fast and efficient. The first time I flashed it I go slow benchmark scores but the score kept on improving and now they are pretty close to the score on the Bonsai Rom Kernal and this Rom gives you a fuller battery charge. I am loving this Kernal I highly recommend it. It is the best kernal I have tried so far and I have tried a lot of kernals in my day. This experimental kernal is the best kernal I have put in my phone this could be my daily driver. I have to give it a full day's test. So far so good not problems to report yet.

thank you! loved this kernels on my evo! will try today/tonight!
ms79723 said:
removed root for me
Click to expand...
Click to collapse
you running syndicate? i think i read the other day that root is in the kernel in syndicate. just run the 1 click root again

The other day I was looking at how to get a little more "umph" from the USB port charging. Do you think that we could tinker with this
Code:
static void s3c_set_chg_en(int enable)
{
int chg_en_val = maxim_chg_status();
if (enable) {
if (chg_en_val) {
if(curent_device_type==PM_CHARGER_TA)
maxim_charging_control(PM_CHARGER_TA, TRUE);
else if (curent_device_type==PM_CHARGER_USB_INSERT)
maxim_charging_control(PM_CHARGER_USB_INSERT, TRUE);
else{
maxim_charging_control(PM_CHARGER_DEFAULT, FALSE);
}
s3c_set_time_for_charging(1);
}
} else {
maxim_charging_control(PM_CHARGER_DEFAULT, FALSE);
s3c_set_time_for_charging(0);
s3c_bat_info.bat_info.batt_is_recharging = 0;
s3c_bat_info.bat_info.batt_current = 0; // hanapark_Victory
}
s3c_bat_info.bat_info.charging_enabled = enable;
}
Making it think that is never is plugged into anything but the wall charger would cause a little more current to be pushed through, and since we only pull like 600 mah from the wall, I think a could USB port/ Cord could handle it.
If none of that makes since, just tell me. I haven't spent more than a few minutes reading through the code that is there, and I really don't know too much about this stuff anyways.

Is this similar to the evo's sbc kernal where it will allow to fully (Trickle) charge an extended battery?

robl45 said:
is this just a kernal flash? can't see what the file is from work. also, is it still the bonsai kernal? so smart ass governor still an option?
is it relatively simple to jack up the charge rate? my friends iphone charges in like an hour or less. mine takes at least 3 hours. annoying to say the least.
Click to expand...
Click to collapse
Yes this is just a kernel, and yes this is based on the Bonsai kernel, anything that is included in the sources available here is included.
I've also added the 2.6.34 Idle timer that nullghost has given to us (taken from the ACS github, Thanks for your hard work guys!).
ms79723 said:
removed root for me
Click to expand...
Click to collapse
It seems that some Roms have root included in the kernel, which is not the case for Bonsai (and therefore this kernel as well).
ps- Thanks for your work on the SBC kernel for the Evo! This was definitely inspired by it.
vide infra said:
thank you! loved this kernels on my evo! will try today/tonight!
[snipped]
Click to expand...
Click to collapse
asj2583 said:
Is this similar to the evo's sbc kernal where it will allow to fully (Trickle) charge an extended battery?
Click to expand...
Click to collapse
This is not quite the same as the SBC kernel for the Evo (this does not trickle-charge).
It differs in that, the Epic already performs a "bump-charge" by default.
This kernel is a simple modification of the values used to determine when the bump charging occurs, etc.
So this is, more or less, just a modification of the stock charging behavior.
=]

Kcarpenter said:
The other day I was looking at how to get a little more "umph" from the USB port charging. Do you think that we could tinker with this
Code:
[snipped]
Making it think that is never is plugged into anything but the wall charger would cause a little more current to be pushed through, and since we only pull like 600 mah from the wall, I think a could USB port/ Cord could handle it.
If none of that makes since, just tell me. I haven't spent more than a few minutes reading through the code that is there, and I really don't know too much about this stuff anyways.
Click to expand...
Click to collapse
You sir, get a separate reply ;]
You are correct that you could change that code to force the USB into thinking it's being charged via AC, but I feel that would be a bad choice in implementation.
Rather check the code here:
/drivers/regulator/victory/max8998_function.c Lines: 3089 ~ 3118
Code:
else if(dev_type==PM_CHARGER_TA)
{
// hanapark_Victory (2010.05.12)
[COLOR="Blue"]reg_buff[0] = (0x0 <<5) |(0x3 << 3) |(0x5<<0) ; // CHG_TOPOFF_TH=10%, CHG_RST_HYS=Disable, AC_FCGH=600mA[/COLOR]
reg_buff[1] = (0x2<<6) |(0x3<<4) | (0x0<<3) | (0x0<<1) | (0x0<<0); //ESAFEOUT1,2= 10, FCHG_TMR=disable, MBAT_REG_TH=4.2V, MBATT_THERM_REG=105C
#ifdef CONFIG_KERNEL_DEBUG_SEC
kernel_sec_clear_upload_magic_number(); // hanapark_DF01
#endif
Set_MAX8998_PM_ADDR(CHGR1, reg_buff, 2);
//printk("%s TA charging enable \n",__func__);
}
else if(dev_type==PM_CHARGER_USB_INSERT)
{
value = FSA9480_PMIC_CP_USB();
// hanapark_Victory (2010.05.12)
[COLOR="Blue"]reg_buff[0] = (0x0 <<5) |(0x3 << 3) |(0x1<<0) ; // CHG_TOPOFF_TH=10%, CHG_RST_HYS=Disable, AC_FCGH=380mA[/COLOR]
if(value){
if (askonstatus)
reg_buff[1] = (0x1<<6) |(0x3<<4) | (0x0<<3) | (0x0<<1) | (0x0<<0); //ESAFEOUT1,2= 01, FCHG_TMR=disable, MBAT_REG_TH=4.2V, MBATT_THERM_REG=105C
else
reg_buff[1] = (0x3<<6) |(0x3<<4) | (0x0<<3) | (0x0<<1) | (0x0<<0); //ESAFEOUT1,2= 11, FCHG_TMR=disable, MBAT_REG_TH=4.2V, MBATT_THERM_REG=105C
}
else
reg_buff[1] = (0x2<<5) |(0x3<<4) | (0x0<<3) | (0x0<<1) | (0x0<<0); //ESAFEOUT1,2= 01, FCHG_TMR=disable, MBAT_REG_TH=4.2V, MBATT_THERM_REG=105C
#ifdef CONFIG_KERNEL_DEBUG_SEC
kernel_sec_clear_upload_magic_number(); // hanapark_DF01
#endif
Set_MAX8998_PM_ADDR(CHGR1, reg_buff, 2);
//printk("%s USB charging enable \n",__func__);
}
I believe it would be better to adjust the values marked above.
But I'm no good with bit shifting code, and I haven't yet figured out what to change the values to.
Of course we (you?) could simply change the value and see what happens, but I prefer to (at least somewhat) understand what I'm doing when I apply a change.
So that is why I haven't messed with it yet, more research needs to be done IMO.
If you do decide to try this, let me know how it goes.
And remember the USB spec says that it only gives out 500mA max.
=]

Well in that case ill be building tonight..... just needed a little refirmation from someone. Makes me sleep bettr at night.
Sent from my Samsung-SPH-D700 using XDA App

FWIW, we used something from no2chem called "Fast Charge" on WinMo, back when I used a Diamond.
It would charge around 900 maH(much less than Diamond's 1340 MaH battery) on USB and AC and drop down(trickle charge) once it reached 90 percent.
"A quick test from a usb2 port shows the following approx values:
At 50% charge, charges at 918mA
50 minutes later, battery is at 90% and charging at 462mA"
Batteries can accept up to their mA in charging, and since the batteries aren't usually spot on to their rated mA, I'd say we'd be safe up until about 1200 mA charging.
If all that makes sense, it's been a while since I've devved and had to learn all that good stuff.
EDIT: @Kcarp: I've got like 4 OEM batteries here, I'm willing to put at least one of them towards testing, assuming it's not going to harm the phone and would be a battery only affair.

mA and mAh are completely different units, one measures current and one measures capacity.
Sent from my Samsung-SPH-D700 using Tapatalk

My Battery has been charging for 4 hours and it is at 60%
My battery has been charging for 4 hours and it is only at 60% what gives? It is at taking a long time to recharge my battery.

intx said:
FWIW, we used something from no2chem called "Fast Charge" on WinMo, back when I used a Diamond.
It would charge around 900 maH(much less than Diamond's 1340 MaH battery) on USB and AC and drop down(trickle charge) once it reached 90 percent.
"A quick test from a usb2 port shows the following approx values:
At 50% charge, charges at 918mA
50 minutes later, battery is at 90% and charging at 462mA"
Batteries can accept up to their mA in charging, and since the batteries aren't usually spot on to their rated mA, I'd say we'd be safe up until about 1200 mA charging.
If all that makes sense, it's been a while since I've devved and had to learn all that good stuff.
EDIT: @Kcarp: I've got like 4 OEM batteries here, I'm willing to put at least one of them towards testing, assuming it's not going to harm the phone and would be a battery only affair.
Click to expand...
Click to collapse
Yep, I always loaded the fast charger drivers from no2chem on my TP1 and TP2. Enjoyed the increased charging rate from the car charger, usb, and other chargers.
That's the one thing I missed when I moved from the TP2 to the Epic...the Epic was god awful slow at charging!

Well, forgot that the hdd on my laptop has become "unstable" gotta go buy one, probably be tomorrow night before I can build I might try building anyways...it still boots, just locks up and makes god awful noises...we shall see I guess.
Sent from my Samsung-SPH-D700 using XDA App

jamice4u said:
My battery has been charging for 4 hours and it is only at 60% what gives? It is at taking a long time to recharge my battery.
Click to expand...
Click to collapse
What you have reported is not normal behavior.
Did you get the battery monitor widget? Could you post some of the history?
I would suggest you unplug from the charger, reboot into CWM, clear the battery stats, and reboot.
Sometimes the percentage readout behaves strangely, some people have reported that rebooting the phone drastically changes their reported percentages.
(Not on this kernel, but it's been mentioned at least a couple times in the Bonsai thread.)
Maybe you are experiencing this?
If you battery has been charging for 4hrs+ and isn't increasing it's percentage, then something is going wrong and needs to be investigated.
This is where the monitor widget comes in handy, what voltage is being reported, what current (mA) is being pumped into the phone, etc.
=]

i tried the kernal, took like 3 1/2 hours to charge up from 35% or so. but i dont know that we are really gaining much, what are we getting,another 2%?
if we could increase the charge rate, that would be something.

Here are 2 bugs I would like to report you loose root, the superuser icon is there, but you can't let special apps ask for permission. 2nd, the kernel is not supported for wirless tether, I am using the snydicate rom if that makes a difference.
Thanks for the kernel, I see great promise in it

[Q] CPU throttle won't work in surface pro?

In the power options, under processor power management, the maximum processor state on battery seems to always revert back to 100% after a reboot or changing power plans. Any ideas why the setting won't stick?

I noticed this as well
..very annoying
is that the only setting you noticed reverting? or are there more?

I assumed win8 handles processes differently requiring less battery consumption.
Sent from my EVO using xda premium

but that isn't the issue
if u go into settings and change the 100% to anything else
it always reverts back .....very annoying ....marked difference in battery life noticed

If you create a new power plan and use it, the settings will stay after a reboot. This is what I did.

Did anyone try 20% CPU so far ? And if so, how is the battery life?
I won't mind getting Surface Pro if I can throttle down its CPU when on battery to Surface RT's speed for a longer battery.
I currently have a RT version with me

Power consumption curve for CPUs is very non-linear. 90% from 100% will probably save you more power than 20% from 90% will. You'd just be wasting a ton of processing capability.

GoodDayToDie said:
Power consumption curve for CPUs is very non-linear. 90% from 100% will probably save you more power than 20% from 90% will. You'd just be wasting a ton of processing capability.
Click to expand...
Click to collapse
Not only that but the windows throttle percentage is not really as specific as a 0-100 range would suggest, so even if you set 20% it might limit the cpu to its minimum frequency.
If you use a tool such as this you can see what the current frequency is: http://www.cpuid.com/softwares/tmonitor.html
With my laptops (much slower) Core2Duo the minimum frequency was too slow, but about 50% of the max worked well and dramatically reduced the heat under load.
Some people reckon it is better to allow the cpu to use its full frequency so that it finishes the job faster and can move back to the lowest idle state. I am not sure that really applies to i5 (which doesn't support the ARM-style idle states that haswell will) and like you say the power consumption at lower cpu frequencies doesn't vary much. My experience with windows is that sometimes for no apparent reason at all programs such as word or chrome sit using 50+% of the cpu and you have to restart the process. It doesn't happen often at all but you might not realise until your battery is low. With the pro's i5 I expect you could get away with quite a low cpu frequency and would at least know you will always get roughly the same battery life.

This is the same problem that w700 has, an even earlier product. This situation made the biggest thread in the acer community because people are angry, some even took back their products and traded for the surface which made it the same than people realized it was not the w700 itself. Throttle stop didnt work because it seems to be more temp related.
Here are some interesting topics
http://community.acer.com/t5/Acer-T...rottling-Turbo-Boost-issues/td-p/6873/page/28
http://forum.tabletpcreview.com/acer-gateway/54122-w700-throttling.html

Walderstorn said:
This is the same problem that w700 has, an even earlier product. This situation made the biggest thread in the acer community because people are angry, some even took back their products and traded for the surface which made it the same than people realized it was not the w700 itself. Throttle stop didnt work because it seems to be more temp related.
Here are some interesting topics
http://community.acer.com/t5/Acer-T...rottling-Turbo-Boost-issues/td-p/6873/page/28
http://forum.tabletpcreview.com/acer-gateway/54122-w700-throttling.html
Click to expand...
Click to collapse
Actually, it is nothing like that problem. The OP is talking about manually limiting the max clock of the device using the Windows setting that has been there for a while now.

[Q] Serious Nexus 5 overheating problem

Hello. I'm new with the account here, but been reading this forum for years.
I'm creating this thread because my new Nexus 5 (which I have for 20 days now) is overheating more than a normal mobile device should.
When i bought it, it had 4.4.4 Kit kat android, and I had that one for about 5 days, and in that time, I didn't notice any overheating, or maybe didn't pay attention, can't remember really.
But after installing official Lollipop 5.0.1, the device is heating pretty good even when browsing internet for 5 minutes, at about 30-40% brightness.
**** Please tell me if some of your devices are acting the same, and is it worth a try to install back an older android to try if it will stop overheating, or my device may be faulty and should I take it back for another one (or maybe switch to LG G2) ?
Because I'm still unable to post image links, i will write it down:
- Ambient temperature: 23 degrees Celsius
- The temperature sensor is taped on the back side, at the side of camera, this is where it overheats most. (even if not using camera)
- Phone temp after staying on standby with screen off: 28 C (it's not warm but it is warmer than desk which it is sitting on)
- After staying idle on home screen with screen on for 10 minutes (50% brightness): 30.5 C
- After chatting on Messenger for 10 minutes: 34.3 C (feels warm)
- After recording video for 4 minutes: 41 Celsius!!! (almost uncomfortably hot in the whole upper half of the phone, both the back side and the screen)
- After 15 minutes letting it cool down, with screen off of course, it is 38 C (still hot to touch), and it stays like that untill I reboot the phone, then it cools down.
The test took about 50 minutes, and after that, battery was drained for about 25%.
-While charging, the phone does not overheat, just gets a little warm which is OK. (haven't tried wireless charging)
P.S. I don't play games on the phone...
Please act quick in case I should return the phone...

the only time my phone gets hot is when im intensively doing a lot of things..
for example.. im playing ingress, have tether ON, and my two sons are using their tablets connected to my phone playing ingress too..
but if i turn off the game and turn off tether, it cools down..
to me it sounds u have something intesively using your CPU and perhaps GPS and other radios.
hold power button.. when PWR OFF shows, long press it and reboot into SAFE MODE...
use the phone for a bit and see if it gets warm... this should tell you if its apps installed.

I only used wifi, no tethering, no GPS, 3G, NFC or any other radios, cell signal is good so phone is not searching for it.
- In safe mode, it still gets warm when using camera. When browsing internet and watching images in google search, also but just mild warm..
- But after sitting and thinking, I've found a problem! After recording with camera and leaving it to cool down, it didn't cool down because it had to make an effort to upload that 5 min video on Google drive via Auto backup!
After turning the Auto-backup off, it is now much cooler!
I will post tomorrow with the results, if something changes...
Anyway, thank you!

First of all, "warm" doesn't mean anything.
Battery temperature does not mean much either, as the CPU is what generates the most heat.
There is a battery temperature throttle that reduces the CPU frequency, but it is almost entirely pointless as the CPU will always reach it's own throttle temperatures MUCH, MUCH earlier than the battery will. The CPU starts throttling at 65C CPU temp (NOT battery temp), and shuts itself down at about 105C CPU temp. Unless your battery somehow reaches a batterytemp of 70C+ (nearly impossible because the CPU will always hit it's throttle first), then I would never even take it into any sort of consideration unless you have a physical battery defect.
Using the camera generates heat since it's CPU and power intensive.
Using the phone in general will generate heat.
Keep in mind that mobile devices are passively cooled, not actively cooled with a fan/liquid.
Not sure what you're so worried about.

Lower your brightness

Lethargy, thank you for a short physics lesson. I'm already into physics and cooling systems so all is clear. I was just worried a bit because all of my previous phones weren't getting this warm (hot), but also never had a multi-core processor in phone eather, maybe that's the reason why I never experienced this before.
Battery temp (measured with app) gets up to 40-42 degrees Celsius, while the phone case gets up to 41 when recording video. Of course that temp won't damage the device, I'm not worried about the processor, but that temp is degrading battery life, in long term.
And about the brightness, phone is not meant to be used at lowest brightness all the time, so that shouldn't be an excuse for high temps. Just sayin'...
Sent from my Nexus 5 using XDA Free mobile app

AlexSRB said:
Lethargy, thank you for a short physics lesson. I'm already into physics and cooling systems so all is clear. I was just worried a bit because all of my previous phones weren't getting this warm (hot), but also never had a multi-core processor in phone eather, maybe that's the reason why I never experienced this before.
Battery temp (measured with app) gets up to 40-42 degrees Celsius, while the phone case gets up to 41 when recording video. Of course that temp won't damage the device, I'm not worried about the processor, but that temp is degrading battery life, in long term.
And about the brightness, phone is not meant to be used at lowest brightness all the time, so that shouldn't be an excuse for high temps. Just sayin'...
Sent from my Nexus 5 using XDA Free mobile app
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The only thing that sounded odd was how it wasn't cooling down until you rebooted, but it sounds like you figured that out with the automatic upload setting.
41-42c battery temp can be normal after prolonged usage, though personally I usually see that after a short gaming session. My brightness is around 40% and high brightness will cause extra heat.
Otherwise the phone is very thin so you can feel the stacked SoC and RAM heat up through the skin fairly easily, right around the camera area as you mentioned.
I think each device and CPU is slightly different and can vary by a few degrees under load as well.

AlexSRB said:
Lethargy, thank you for a short physics lesson. I'm already into physics and cooling systems so all is clear. I was just worried a bit because all of my previous phones weren't getting this warm (hot), but also never had a multi-core processor in phone eather, maybe that's the reason why I never experienced this before.
Battery temp (measured with app) gets up to 40-42 degrees Celsius, while the phone case gets up to 41 when recording video. Of course that temp won't damage the device, I'm not worried about the processor, but that temp is degrading battery life, in long term.
And about the brightness, phone is not meant to be used at lowest brightness all the time, so that shouldn't be an excuse for high temps. Just sayin'...
Sent from my Nexus 5 using XDA Free mobile app
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Your temperatures are fine and you shouldn't worry about it. It's average for a Nexus 5, and there are throttles/shutdown temps anyways, for both the battery and CPU. I've had mine for a year and there hasn't been any sort of issue, normal usage should be negligible to the condition of the battery.

Ok, everything seems to be ok then. Now I can go to sleep without worrying Thanks guys!
Sent from my Nexus 5 using XDA Free mobile app

HTC U 11 Temperature issues?

Hello, I have been using HTC U 11 for a couple of days now. I find it really odd that the temperature is kinda little high at all times. here are my observations.
before I start im from chennai and the avg temperate here ranges from 28 to 35 on a normal day.
I first noticed heating when I was recording a FHD video at 60FPS for more than 3 min. The camera stopped taking video due to overheat. The phone was uncomfortably hot. But then I realized maybe its because I was riding as pillion in motorcycle while recording and it was 1 PM in the afternoon with Sun burning your eyes. So I thought maybe its because of that.
then taking any 4K, hyperlapse videos increased temperature. So i used CPU temp to analyze the temperature(with back case removed) I was in a AC Hall with room temperature of around 26 degrees C and the starting temperature was 36 degrees C in my phone. Then,
I took two 4K videos 1 and 2 minutes each and the temperature went from 36 to 47 and once the video is finished it settled back to 41. the CPU was at 1900 MHz while recording and throttled down to 300Mhz once its done.
then I ran 3D Mark tests. it gave me a score of some 2.7K with an average FPS of 25 but while performing this test my CPU went to a whooping 53 degrees C and settled back to 45 degree C once its done. Normal Phone operations like FB, reddit, discord etc gives me around 36 37C which still, i feel is too much and despite being a glass body I have never felt any form of chillness even after hours of being in AC room it was always pleasantly warm when normal use to uncomfortably warm on high use.
Do you guys think that I have a defective device? I still have 4 days on free return policy with the seller. should I replace my phone?

I'd say it's normal for a phone.
Video recording and running heavy games is the most difficult tasks for smartphone (maybe now it's VR & AR), I'm not surprised at all if the temperature raises at 42 degrees or more.
Benchmark apps like 3D marks take full power of computing capability, no wonder why it gets even hotter.
Smartphone is a smartphone, not a PC nor a GoPro.

Alpert3 said:
I'd say it's normal for a phone.
Video recording and running heavy games is the most difficult tasks for smartphone (maybe now it's VR & AR), I'm not surprised at all if the temperature raises at 42 degrees or more.
Benchmark apps like 3D marks take full power of computing capability, no wonder why it gets even hotter.
Smartphone is a smartphone, not a PC nor a GoPro.
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yeah! i thought that too. actually i think for a processor like 835 normal temperature is 35 36. I do understand that Optical Image stabilization and image stitching are quite heavy tasks . maybe im paranoid. I just want to make sure it doesnt damage the phone in the long run. Also its kind of a pride thing . you see from where I am, There are tonnes of pun and memes about cheap MI phones and heating. So people around here were like you have a $700 phone(thanks to all the customs and import duties) and it heats like a $50 MI phone?. *smh*.
Do you think installing custom rom can increase performance? I really want to get rid of that HTC companion, news republic, facebook and messenger. FB sucks. it takes up almost 300MB of RAM at all times.

It would not damage your phone but as we speak of the "long-term", something you probably should know:
If you keep using your phone for heavy tasks and temperature of the device is always at 38°C or higher, it could decrease the battery life. Higher temperature would cause the loss of battery capacity. You probably should be careful.
As for MI phones, 50$ is hard to get one. And heating meme is because of Qualcomm S810 back in 2015, for HTC, Xiaomi, as well some other devices. Some people just couldn't get over it even we have S835 today.
For RAM consumption, I'd say leave it, because on the one hand, U11 has 4GB of RAM, 300MB does no harm. (the theory is, the free RAM is some sort of a waste, you don't need to be careful about the RAM usage as long as you don't experience serious lag) on the other hand, you can always disable the apps if you don't need them. Installing another ROM won't make these apps running with less RAM.

Question Rog 3 Temperature

Hi, I want to buy the Rog 5 but I've heard that it has high temperatures even from light use (like when using YouTube it reaches 40degrees celcius). How are the overall thermals? I'm not talking about throttling I'm talking about general temperature when using the phone for light tasks. Any info would be highly appreciated. Also any info on battery life would be great too

From what I have heard from Youtube and reddit, It is a hot phone because it keeps internals in a good temperature, plus they achieved better temperature after update.

Oxydrix said:
From what I have heard from Youtube and reddit, It is a hot phone because it keeps internals in a good temperature, plus they achieved better temperature after update.
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But having a warm phone isn't a good sign is it? I'm currently using a huawei p40 pro plus and it's super cool (probably because of the ceramic body). You mentioned an update, so is the rog 5 cooler after the update? On YouTube Technick ran a battery drain test and the Rog 5's peak temp was almost 60 degrees celcius

Thanos88 said:
But having a warm phone isn't a good sign is it? I'm currently using a huawei p40 pro plus and it's super cool (probably because of the ceramic body). You mentioned an update, so is the rog 5 cooler after the update? On YouTube Technick ran a battery drain test and the Rog 5's peak temp was almost 60 degrees celcius
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I don't know about the reliability of this man, but look here

Oxydrix said:
I don't know about the reliability of this man, but look here
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Thanks man. This really helped.

I got it a few days back, I can share some impressions. Yes, it's a hot phone. Yes CPU temp gets up to about 40 degrees sometimes when browsing or multitasking. Gaming also gets it to about 45 - 50 on CODM and Dead Cells and between 55 and upwards of 60 with Genshin Impact. A Peltier effect cooler like the FunCooler from black shark brings this down about 10 degrees. This temperature is mostly felt at the center of the display, while the sides on the back, where the batteries are, remain noticeably cooler. Perhaps their goal was to dissipate het through the display, idk.
I haven't been able to notice any drop in performance yet, even with the thermal limit set to low. What I don't know is how this affects the chip long term, but I hope it doesn't degrade for at least about 5 years. Either way I'm sticking with a cooler for Genshin impact just to make sure the device lasts longer.

cotov said:
I got it a few days back, I can share some impressions. Yes, it's a hot phone. Yes CPU temp gets up to about 40 degrees sometimes when browsing or multitasking. Gaming also gets it to about 45 - 50 on CODM and Dead Cells and between 55 and upwards of 60 with Genshin Impact. A Peltier effect cooler like the FunCooler from black shark brings this down about 10 degrees. This temperature is mostly felt at the center of the display, while the sides on the back, where the batteries are, remain noticeably cooler. Perhaps their goal was to dissipate het through the display, idk.
I haven't been able to notice any drop in performance yet, even with the thermal limit set to low. What I don't know is how this affects the chip long term, but I hope it doesn't degrade for at least about 5 years. Either way I'm sticking with a cooler for Genshin impact just to make sure the device lasts longer.
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Thanks for the reply. 40 degrees from just web browsing is ridiculous. Rather dangerously high and will definitely degrade batteries. Think I'll give the rog 5 a miss

Thanos88 said:
Thanks for the reply. 40 degrees from just web browsing is ridiculous. Rather dangerously high and will definitely degrade batteries. Think I'll give the rog 5 a miss
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40 is the CPU reading I get. Batteries stay about 5 degrees below the CPU for normal use generally according to my observations, just to make that clear. Not sure which battery temp it's actually reading though, since there are 2 batteries.

Thanos88 said:
Спасибо за ответ. 40 градусов от простого просмотра веб - страниц-это просто смешно.
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120/144 Hz need more power

cotov said:
40 is the CPU reading I get. Batteries stay about 5 degrees below the CPU for normal use generally according to my observations, just to make that clear. Not sure which battery temp it's actually reading though, since there are 2 batteries
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cotov said:
40 is the CPU reading I get. Batteries stay about 5 degrees below the CPU for normal use generally according to my observations, just to make that clear. Not sure which battery temp it's actually reading though, since there are 2 batteries.
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40 is still too high though for normal usage. I've never heard of a phone go that warm. My huawei sits at 22 maximum.

Phone arrived 2 days ago, in my experience It Is not that hot, while browsing / YouTube / Instagram It Is cool (about 31/32 °c) and my ambient temperature Is around 20 °. I have played 1 hour call of duty and It reached 37 ° on the cpu, while the phone was hotter, especially in the middle. I think this Is how It works, getting hot outside to be colder inside. Also I updated to firmware 2102.81 which helped a lot.

Oxydrix said:
Phone arrived 2 days ago, in my experience It Is not that hot, while browsing / YouTube / Instagram It Is cool (about 21/22 °c) and my ambient temperature Is around 20 °. I have played 1 hour call of duty and It reached 37 ° on the cpu, while the phone was hotter, especially in the middle. I think this Is how It works, getting hot outside to be colder inside. Also I updated to firmware 2102.81 which helped a lot.
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Thanks for this!! I'll probably buy one now