Develop Bugs

[Q] Battery temperature?

Hi all,
Can you tell me how much does your battery of desire z heat? I think mine is over heating during charging. Please tell me your charging (temperature of battery an hour after pluging) and non charging temperatures in celcius.

for me around 25-30 degrees celcius

Earlier mine was -5 yours seems a lil warm hmm but now while charging 38c and 100f
Sent from my HTC Vision using Tapatalk

do rom and kernel affect battery temperature? I have both of them stock

Deadly Sto(R)m said:
do rom and kernel affect battery temperature? I have both of them stock
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The clock speeds would afaik
Sent from my HTC Vision using Tapatalk

According to SetCPU, my G2's battery is currently at 40.7 Celsius while charging with the profile set to drastically underclock once it hits 45.5.

MacaronyMax said:
Earlier mine was -5 yours seems a lil warm hmm but now while charging 38c and 100f
Sent from my HTC Vision using Tapatalk
Click to expand...
Click to collapse
Well my phone is set to overclock at 1.5ghz ondemand so the temps may be alittle higher than stock
Sent from my HTC Vision using XDA App

My battery gets pretty warm when it's charging. Last I checked, it hovers around 40C. Shouldn't get too worried about temperature unless it breaks the 45-50 degree mark as batteries get warm in general when charging.

Athrun88 said:
My battery gets pretty warm when it's charging. Last I checked, it hovers around 40C. Shouldn't get too worried about temperature unless it breaks the 45-50 degree mark as batteries get warm in general when charging.
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I saw 48,1 a while ago so it got me worried. Do you think me to send my desire z to authorized service?

Deadly Sto(R)m said:
I saw 48,1 a while ago so it got me worried. Do you think me to send my desire z to authorized service?
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Click to collapse
If its staying under 50* I wouldn't be horribly worried. When charging and OC'd mine has hit the 45* mark (had a setCPU profile for it) a few times. I just gave it a rest for a minute and its back down to normal.
If your battery is hitting the 45* mark quickly or without much use you may have an issue going on. Other than that, I wouldn't be alarmed if you get high temps under heavy use or if you're largely OC'd.

martonikaj said:
If its staying under 50* I wouldn't be horribly worried. When charging and OC'd mine has hit the 45* mark (had a setCPU profile for it) a few times. I just gave it a rest for a minute and its back down to normal.
If your battery is hitting the 45* mark quickly or without much use you may have an issue going on. Other than that, I wouldn't be alarmed if you get high temps under heavy use or if you're largely OC'd.
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Click to collapse
so it would be better if i wait to send. I have noticed that it is heating while i am talking with charging at the same time.

My battery tends to heat up when I'm using mobile data, but it never goes beyond 50

Oh btw, if you have high battery temps while charging, this reduces your battery life because the temps mess up the chemical compounds in the battery over time
Sent from my HTC Vision using XDA App

evilcuber said:
Oh btw, if you have high battery temps while charging, this reduces your battery life because the temps mess up the chemical compounds in the battery over time
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
I saw just charging is heating it around 38-39C. It has overheating (in my mind) when charging + talking...

evilcuber said:
Well my phone is set to overclock at 1.5ghz ondemand so the temps may be alittle higher than stock
Sent from my HTC Vision using XDA App
Click to expand...
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I was being sarcastic because mine was -5 don't worry Read my thread saying XD Help Please to understand why
Your temps are very good especially for 1.5
Sent from my HTC Vision using Tapatalk

Deadly Sto(R)m said:
I saw just charging is heating it around 38-39C. It has overheating (in my mind) when charging + talking...
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Well how hot is it getting? And there's no doubt that talking while charging will get your battery quite hot.

martonikaj said:
Well how hot is it getting? And there's no doubt that talking while charging will get your battery quite hot.
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Click to collapse
it is around 45-48 degree celcius

Deadly Sto(R)m said:
it is around 45-48 degree celcius
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Click to collapse
That's rather hot add.a charging profile to downclock I'd say
Sent from my HTC Vision using Tapatalk

Deadly Sto(R)m said:
it is around 45-48 degree celcius
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Click to collapse
its regularly that hot during normal use?

martonikaj said:
its regularly that hot during normal use?
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it is normally 30-38 degree

The best ultimate super oober battery trick to make phone last 6 days

I have a question. My battery gets to 4200mV around 80% which means its fully charged.it continues to slowly climb to 100% after that even though it hit a full charge long before it says 100%. I tried battery calibrator but it doesn't seem to help. what should I do?

Use wifiwhen possible. Turn off all unused radios (GPS,wimax,data,wifi)
Also don't run Max brightness when screens on.
Sent from my Galaxy S2 Epic 4g Touch.

Turn phone completely off.
Leave phone off.
Observe epic battery life.

Kn0wBuddy said:
Turn phone completely off.
Leave phone off.
Observe epic battery life.
Click to expand...
Click to collapse
+1
If you want a phone to last you six days, u better get a flip phone.
Unless you airplane mode the phone and never use it you will not get more than two days max, which is pointless since its not really a phone in that situation.
Sent from my Galaxy S2

bluefire808 said:
I have a question. My battery gets to 4200mV around 80% which means its fully charged.it continues to slowly climb to 100% after that even though it hit a full charge long before it says 100%. I tried battery calibrator but it doesn't seem to help. what should I do?
Click to expand...
Click to collapse
I think full charge is based off the mAh not mV.
Sent from my SPH-P100 using XDA App

I dont know how the circuit in the phone works, but when I charge up my lithium batteries for my RC car, while its charging the circuit shows a higher voltage than the battery will actually be at when its pulled from the charger. I also dont know what tells the charger it is full(or getting full) but the charger starts charging at a lower amperage the closer to full the battery becomes.

maddmatt02 said:
I dont know how the circuit in the phone works, but when I charge up my lithium batteries for my RC car, while its charging the circuit shows a higher voltage than the battery will actually be at when its pulled from the charger. I also dont know what tells the charger it is full(or getting full) but the charger starts charging at a lower amperage the closer to full the battery becomes.
Click to expand...
Click to collapse
Yes, your chaging with amps, not volts really.
Sent from my SPH-P100 using XDA App

For the people telling me how to get better battery life there's not what I even asked about in the OP. The guys that said its not the mV and its the mAh that does make good sense. Is there a app or widget to watch it in real time? I have better battery by curve fish that shows mV not mAh. Thanks for the feed back guys!

bluefire808 said:
For the people telling me how to get better battery life there's not what I even asked about in the OP. The guys that said its not the mV and its the mAh that does make good sense. Is there a app or widget to watch it in real time? I have better battery by curve fish that shows mV not mAh. Thanks for the feed back guys!
Click to expand...
Click to collapse
Grab battery monitor widget and better batter stats. BMW updates every min, but can be set lower. BBS is on of the best apps to show what's using battery.
Sent from my SPH-P100 using XDA App

bigtoysrock said:
Grab battery monitor widget and better batter stats. BMW updates every min, but can be set lower. BBS is on of the best apps to show what's using battery.
Sent from my SPH-P100 using XDA App
Click to expand...
Click to collapse
Thank you so much. I will try them both!
Edit-I installed better battery widget.only problem I'm having is it shows me running an 1500mAh battery. I sent the dev a email which they say to do if its showing an incorrect value. So this should be fixed to. It works great thanks again so much. I now know one more thing about my phone that I didn't before

IIRC The SAMOLED+ pixels are off when displaying black. Google pure black and set it as you wallpaper. That should help.

bluefire808 said:
Thank you so much. I will try them both!
Edit-I installed better battery widget.only problem I'm having is it shows me running an 1500mAh battery. I sent the dev a email which they say to do if its showing an incorrect value. So this should be fixed to. It works great thanks again so much. I now know one more thing about my phone that I didn't before
Click to expand...
Click to collapse
You know that you can change the mAh in settings in BMW right?
Sent from my SPH-P100 using XDA App

what app is BBS? i can't find anything that stands for those initials

ericc2728 said:
what app is BBS? i can't find anything that stands for those initials
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Better battery stats.
Sent from my SPH-D710 using XDA App

Also depending on how aggressive your overclock is since it will raise voltages depending on frequencies. Also syncing data is a huge battery drainer. If you kill auto sync and only do manual syncs, it will feel like night and day.

bigtoysrock said:
...better batter stats...
Click to expand...
Click to collapse
Where is this in the Market? I searched for "better battery stats" and got nothing with that name.

Sturmie said:
Where is this in the Market? I searched for "better battery stats" and got nothing with that name.
Click to expand...
Click to collapse
Try and search "BetterBatteryStats"
Sent from my SPH-D710 using xda premium

Kn0wBuddy said:
Turn phone completely off.
Leave phone off.
Observe epic battery life.
Click to expand...
Click to collapse
haha epic response

Downclock CPU to save battery?

I`m not playing games or running CPU demanding apps, just phone calls/sms/bit of non flash web.
Is it possible to downclock CPU to increase usage(save battery)?
Or CPU doesn`t eat that much battery and downclocking would have very little effect on battery?

With a rooted device, you might want to try CPU Master Free. You will be able to decrease the clock speed.
Also, you could try to UnderVolt your CPU. Search for your phone model UV in te forums.

Min frequency is 350MHz so if your not doing anything it will be idling at 350mhz

rbs_uk said:
I`m not playing games or running CPU demanding apps, just phone calls/sms/bit of non flash web.
Is it possible to downclock CPU to increase usage(save battery)?
Or CPU doesn`t eat that much battery and downclocking would have very little effect on battery?
Click to expand...
Click to collapse
It does help you save precious battery life.
You can download the best app for overclock, SetCpu, from the XDA site, it's free for XDA members:
http://forum.xda-developers.com/showthread.php?t=505419

How much more battery life I could get by downclocking CPU? Any feedback from people who have tried such thing?

On my gn i find the screen to be the biggest user of thr battery power so underclocking prob would have little use, ohh and iirc the phone uses race to idle which procesess overything as fast as possible to get the cpu back it low power idle state.

rbs_uk said:
How much more battery life I could get by downclocking CPU? Any feedback from people who have tried such thing?
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Click to collapse
I normally charge my phone before go to sleep, I don't overcharging it during the night.
My SetCpu frequencies are Min 19/ 692 Max.
I am connected through 3G data ALL day and I am always online on Skype, I use my phone a lot, browsing, games, and phone call, and I can tell you, thanks to the undervolting, I got home at night with 50% juice remaining.
Without SetCpu, I would have 10/15% left at night...

yukinok25, that`s huge improvement, I`ll try it definitely.

rbs_uk said:
yukinok25, that`s huge improvement, I`ll try it definitely.
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And...this is why we all love XDA...
Remember that battery life also depends on Radio version and kernel installed.

I remember there was a topic about "How to charge your phone first time" - cannot find it any more.

rbs_uk said:
I remember there was a topic about "How to charge your phone first time" - cannot find it any more.
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If you mean after you just bought it, Its enough to let it fully discharge twice, without charging it, in between this two circles.
Anyway with nowdays Li-ion battery, you won't really need to this so anymore, since the lifespan of battery start to decrease from the moment that they left the production factory.

yukinok25 said:
If you mean after you just bought it, Its enough to let it fully discharge twice, without charging it, in between this two circles.
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Yes.
Discharge twice without charging - hmm... once its dead its dead. I didn`t get it

rbs_uk said:
Yes.
Discharge twice without charging - hmm... once its dead its dead. I didn`t get it
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Click to collapse
Sorry for my english.
I meant during your usage time (during the day) don't charge your phone at all. let it discharge fully twice.

yukinok25 said:
Sorry for my english.
I meant during your usage time (during the day) don't charge your phone at all. let it discharge fully twice.
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Click to collapse
Ok, thanks.

Anytime mate!

Ive read good results on using juice defender app to prolong battery life:
http://android.modaco.com/topic/349071-galaxy-nexus-battery-drain-issues/

L60N said:
Ive read good results on using juice defender app to prolong battery life:
http://android.modaco.com/topic/349071-galaxy-nexus-battery-drain-issues/
Click to expand...
Click to collapse
I would not recommend juicedefender. Doesn't do anything at all. The only thing I notice is that nu wi-fi turned itself off when it shouldn't.
You could try AutomateIt. You can set up your own actions.
Ex: Within 100 meters of school > Sound off

[Q] How to maximize the battery life(not the same as it sounds)?

By how to maximize the battery life I mean the life of the battery itself(1-2 years) not how long it lasts(1-2 days)?
I've read that if you charge your battery to 90% it is better than to charge to 100%. Is it true? I mean that if you use your battery a lot it will die in 2 years. But is there a way not to kill your battery this fast. I am using Air Kernel and CM10.1 so I can set the battery to charge only to 100%(default), 96%(as stock) or even lower.

Batteries last much longer than 2 years even without you changing anything. No reason to bother if that's your goal. Just avoid extreme hot and cold temperatures and water and it's foolproof.

most likely, your battery will outlast your device.

But will it be bad for the battery if I set the maximum charging to 100 rather than to stock 96%?

daniil1410 said:
But will it be bad for the battery if I set the maximum charging to 100 rather than to stock 96%?
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since 2008, ive always charged my devices(android) to 100%, even leaving them on the charger much longer. ive never had a battery problem. needless to say, none of my devices has ever outlasted the battery.

simms22 said:
since 2008, ive always charged my devices(android) to 100%, even leaving them on the charger much longer. ive never had a battery problem. needless to say, none of my devices has ever outlasted the battery.
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Click to collapse
OK, but the stock battery capacity that Samsung have set is 96. I believe that they have a reason for that. But the kernel's default is 100.

daniil1410 said:
OK, but the stock battery capacity that Samsung have set is 96. I believe that they have a reason for that. But the kernel's default is 100.
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Click to collapse
If you believe it's at 96 for a reason then why are you asking us?

063_XOBX said:
If you believe it's at 96 for a reason then why are you asking us?
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Click to collapse
I'm asking you is there really a reason or not. Have you used a device with custom kernel that sets the battery to 100% for year or so?

daniil1410 said:
I'm asking you is there really a reason or not. Have you used a device with custom kernel that sets the battery to 100% for year or so?
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Click to collapse
Years. Unused battery capacity is wasted capacity.

daniil1410 said:
I'm asking you is there really a reason or not. Have you used a device with custom kernel that sets the battery to 100% for year or so?
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Click to collapse
Complete cycles do negatively affect the lifespan of the battery, but most folks will have moved on to another phone by the time the battery is to the point of being unusable.
Sent from my Nexus 7 using Tapatalk HD

Battery charges to above 4300mV

Hi guys,
Today I've installed battery monitor app and saw that at full charge with the charger connector still attached I have a voltage above 4300mV. I know that Li-Ion are very stressed above 4200mV and this shortens the battery life a great deal (you are left with only 1/3 of the battery endurance that you would normally have). Do you think lg made this purposely so we would have a little more juice with the downside of a quick degradation of battery performance? Thanks

cojocar.andrei said:
Hi guys,
Today I've installed battery monitor app and saw that at full charge with the charger connector still attached I have a voltage above 4300mV. I know that Li-Ion are very stressed above 4200mV and this shortens the battery life a great deal (you are left with only 1/3 of the battery endurance that you would normally have). Do you think lg made this purposely so we would have a little more juice with the downside of a quick degradation of battery performance? Thanks
Click to expand...
Click to collapse
The battery is a 4600 mAh. Does the number not directly corelate?

sleekmason said:
The battery is a 4600 mAh. Does the number not directly corelate?
Click to expand...
Click to collapse
voltage (mV) is different from amperage (mAh)
think of electricity as a waterfall
voltage = height of the waterfall, how much potential energy a water droplet has
amperage = how much water is actually falling per second
anyways, those apps might not be accurate. also, battery charging has some profile/curve. 4.3V isn't particularly bad
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
http://batteryuniversity.com/_img/content/ion2.jpg

I have another question. How long does your battery last? I'm on mahdi 2.8 with redkernel v9 and from 92% to 10% I only have 5h-6h screen on time with only browsing… Discharge rate measured with battery monitor is between 600mA and 1000mA. It seems an awfully short time. Others report more than 10h on a full charge… How's your battery life? Thanks

cojocar.andrei said:
I have another question. How long does your battery last? I'm on mahdi 2.8 with redkernel v9 and from 92% to 10% I only have 5h-6h screen on time with only browsing… Discharge rate measured with battery monitor is between 600mA and 1000mA. It seems an awfully short time. Others report more than 10h on a full charge… How's your battery life? Thanks
Click to expand...
Click to collapse
Six hours is the most I have ever seen on both of my Gpad tablets. I have not noticed much difference between any ROM or kernel. I have never seen anything close to 10 hours on the Gpad.
Sent from my LG-V500 using xda premium

I improved the battery a bit by undervolting (324Mhz -> 700mV, 1242Mhz->925mV) , reducing the freq of the cpu to 1242Mhz and reducing the gpu freq to 320Mhz. I gain 1h with these changes (I‘m only using the tablet for browsing/reading). I would buy a cover with a slot for an external battery but I didn't find one…

cojocar.andrei said:
I improved the battery a bit by undervolting (324Mhz -> 700mV, 1242Mhz->925mV) , reducing the freq of the cpu to 1242Mhz and reducing the gpu freq to 320Mhz. I gain 1h with these changes (I‘m only using the tablet for browsing/reading). I would buy a cover with a slot for an external battery but I didn't find one…
Click to expand...
Click to collapse
I am experimenting with my two Gpad's. I currently have both set up wit Mahdi ROM and Mani kernel. I have one underclocked both cpu and gpu. The other has stock settings. Interested in seeing how much difference it makes. I am not expecting much because the screen eats up most of the battery.
Sent from my LG-V500 using xda premium

mani kernel gave me sdcard unexpected unmounts while writing to sd and putting the tablet to sleep

Under clocking the cpu and gpu and under volting the cpu gained about 90 minutes of screen on time, but it was not worth the cost in performance… which was especially noticeable when switching between apps. The main reason for using a custom kernel (red kernel or mani) is to improve performance...not cripple it.
Sent from my LG-V500 using xda premium