Database Users

shut down voltage in rafpigna kernel

Hi Guys!
Sorry for posting this here, but with less than 10 posts i'm not allowed to post in development threads.
i'm using rafdroid 3.1 and really love it, it's a great build!
but my battery lasts only for about ~12-18 hours on normal usage. This is really a problem for me, it should last at least 24h, better 30h in normal usage. cause when i have to use it more, i need to go to ~12h without any problems...
i noticed that the shut down voltage in the used kernel is @ 3.6V, could somebody confirm this?
A li-ion battery can be discharged to 3.0V (maybe lower) without any problems. I'm into r/c planes so i have a lot to do with batteries and i know this is true, also look here: http://en.wikipedia.org/wiki/Cutoff_voltage#Premature_voltage_cut-off
So is it possible that i set the shut down voltage for myself to 3,2V or 3,0V?
Maybe this would bring the extra hours i'm searching for...
switching to a none sense build isn't a solution for me, i love sense and use it a lot (the dialer is really near to the best thing i can imagine, i also love friendstream and the weather widget with the fullscreen animation...)
We are dischargin with a maximum of 0,2C (~240mA) so when you look at this chart at the red line:
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we are nearly wasting the half battery time when shutting off @3.6V. with a shutoff @[email protected],2C i think we would have a 1/4 more use time. with a shutoff @[email protected] in standby mode (4mA) the battery would maybe stand 2 times longer?
but in fact of the fast downgoing voltage i would prefer to go to 3,2V to be on the safe side...
sorry for my bloody english, i hope everyone can follow me

I think this is a very interesting question. I have calibrated my battery but it seems like my ROM/kernel (imilka Vision Sense 4.1) is thinking that 3.6 V is the same as empty and shuts down. It initiates the shutdown procedure at that level approximately. After that it can be restarted some times before the battery is completely empty.
What I am looking for is a solution to change the shutdown voltage to 3.2 V instead of 3.6. It would be a good addition to the battery life.
If there´s some kind of configuration file that can be changed it would be good to have it done.
It seems like calibration doesn´t solve this configuration problem. It still shuts down at too high level.
I hope this thread can provide a solution.

That's really interesting. But I think it is a protection feature for the battery itself. So I don't know what might happen if you go down to 3.2V.
I'm not sure but this might be a driver or even something deeper in our phone that causes the shutdown so early. So I guess it's not very smart to touch this piece of the system and I don't know if it is possible anyway. But please, someone who knows better should let me know

As far as i know, the hardware cut off in the batterie is around 2.6v, so there would be no caution to the batterie itself. I also read that the software shutdown is in the kernel.
So the question is, if there is a posability to change the voltage myself or if this have to do a kernel chef?
The danger to destroy the batterie with this experiment would be very smal, and if, an original htc batt cost @ amazon ~20€...

Actually I think if you look at the post about Battery stats bin file, there is talk about the actual cut off without harm to the battery, and I think I remmeber seeing that 2.6 is the cutoff, is there a way to see what WinMo cuts off at? this way we are sure of the same cutoff, cause I agree the battery doesnt last nealy as long as winmo and that would be a good reason why.

It would be great if some of the devs could also say something to this thread

hopefully the devs notice this thread.
honestly this is the best (better most exciting) idea i have heard since magdlr came out did you allready ask in the irc?
#htc-linux, #htc-linux-chat on freenode

sorry, I'm not usin irc, maybe someone else could do this

I like this idea too especially since most batts have some juice left till 3.2 Volts and all the extra bits of minutes we can squeeze out of it is nice.
BUT, I wonder if this is not being done on purpose. Who says our beloved phone works under a certain Voltage treshold?
I have no schematic so I can't check on what Voltage the components and probably the Voltage regulator work.

There´s a sign that we should be able to get some more juice from the battery. When the device switches itself off there´s sometimes power left to do atleast 2-3 reboots almost until full boot (with other it switches off first when the home screen is supposed to be shown).
That is an indication that there should be some more power left in the battery which means the shutdown can be delayed somewhat in theory. When the battery is really depleted the HD2 switch itself off after one second of showing the bootscreen. But before it can almost complete 2-3 reboots.
In Windows Mobile it´s a little bit different - it can do one reboot before calibration but with Android it´s able to do more reboots before depletion. I would guess that 3.3 V would be a proper shutdown value when those reboots is considered. Unfortunately I don´t know how the voltage when it has been emptied down to "immediate shutdown" because it indicates 3.6 V after the first successful boot with charger connected.

My phone is dying at 30%... Started to happening when I changed the ROM. I managed to drain the battery to 7% with 3.4 V... At this point I can't keep de phone on to drain the rest. Tried all "calibration" methods.. not working

[x10 Autoshutdown issue] Temporary fix?, Sd cards bad sectors?

First i hope u understand me.!! (My english is not that good....)
My phone was suffering from the same thing (for 3 months more less)...
It was really annoying because my phone started tu shutdown after 1-3 minutes of use. but yesterday i found that it was working as intended after i have formated my sd card..
I have been making some researches about this problem and i found that the problem may be your sd card.
I suggest u to format it in slow mode.
Restore device defaults
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unclick quick format
and thats all
for me is working, im using FXP30 with doomkernel + wifi modules
I hope this work for u too, this bug is really annoying....
edit1 - try playing a game for at least 15-20 minutes in order to know if this worked for u.
let me know if this worked......

hm, my phone shuts down randomly after about 3 hours of usage. i'll give this a try when i get back home.

Hmm, the shutdown issue could be caused by using custom ROM or custom kernel but not usually caused by SDCARD.Maybe it is bug of your ROM. Have you try another ROM and it is the same?
Sent from Sony Ericsson Xperia X10 - Stock Android 2.3.3 Modded

is the same ..
edit - is only a temporary fix, after a manual reboot it start to shutdown again... at least for me.

Same problem here with my x10 w/ stock clock interactiveX, and class 4 sdhc on any kernel or rom. My wifes x10 is perfect with class 2 sdhc, doomkernel, interactiveX, unlocked sim and BL, OC'd to 1.22ghz (temp control using setcpu profiles). my problematic x10 is similar spec to wifes but with fat batt, and aftermarket sd card.
I slow formatted twice, still same prob, so replaced sd card, but still restarts. especially when using youtube, heavy internet, gaming, and general use while charging. SO, after observations, i suspect: 1 fat mugen battery is trapping heat under it, 2 bad sectors in RAM, 3 general hardware fatigue, 4 another sd card with bad sectors. since those are as common denominators during heavy use and caching...
I'm gonna go back to stock batt, and try another sd. if problem persists, its gonna be an excuse fo either a sgs2 or nexusprime

The device does shutdown itself if:
Temperature of the battery exceeds somewhere around 42-45 degree Celsius (or 107-113 farenheit)
and/or:
Voltage of the battery drops below 3.0 volts (Or what is set as 0% battery capacity for android devices)
Some third party batteries can show a charge level above 3 volts (above 0%), yet be "out of juice". It's known to those batteries that claims themselves to have more capacity compared to the original batteries. In fact, they don't. They only got the voltage "skewed up" in order to appear as a higher capacity battery.
(Most common among "higher capacity" batteries that have the same size as the original.)

My phone shuts down when the battery gets empty

My phone has been shutting of due to battery drain latley, ill be around 30 or 40% leave it sit, then when i come back ill hear it vibrate, hit the unlock button just in time to see the battery indicator at 1%, the trick is when i power back up the phone is back at 30 or 40% battery life again, i've calibrated, wiped stats but it keeps doing it.

I am in discussions with 3 UK and they have informed me that the issue, at least in my case, is down to me dropping the phone. I have told them that is the case, but they have insisted that a cracked glue joint is to blame. How many people have actually suffered from this fault, and what networks are you on?

What does the SDCard has to do with anything? The system is not even in the SD card.

@Hzu mate the size of your sig is BIGGER THAN HUGE

sahibunlimited said:
@hzu mate the size of your sig is bigger than huge
Click to expand...
Click to collapse
i did it on purpose lol. Let's see the reaction of the others. Lol

Hey..
Did you ever Google "x10 random reboots "?
You will be surprised, but not the nice kind of way.
They say that it's a problem of the Mainboard so only Sony can fix this.
I have the same problem but not that often and only while playing games.
Greetings!
Sent from my X10i using XDA

Get a new battery
I used to have problems with my X10 (SO-01b) suddenly shutting down.
Typically the cause (from what i've read on XDA) is:
1.) It gets too hot
2.) need to recalibrate your battery stats
3.) you need a new battery
I spent a couple months testing out different things and found my battery's voltage would drop too low even when it had enough "charge"
The solution was to just buy a new battery; The new battery cost was really cheap from my carrier (about the cost of 3 to 4 starbucks coffees)
X10 launched over 2 years now; If you haven't replaced your battery by now, you're probably overdue for it (or get a new phone)

Fixed
I reformatted hubby's sd card 4 times in a row now no reboot issue. Thanks for all the great info!

x10i :( said:
I am in discussions with 3 UK and they have informed me that the issue, at least in my case, is down to me dropping the phone. I have told them that is the case, but they have insisted that a cracked glue joint is to blame. How many people have actually suffered from this fault, and what networks are you on?
Click to expand...
Click to collapse
I am suffering from this to. I will try a new battery. With me, the phone dropped a few times (battery cover is even cracked...). It is 2j+ old so it could well be the battery.

Nexus 4 sudden battery drops, sim pin requests

Hello all!
So I've owned the N4 since May 2013, it worked great, but right now some severe issues popped up. These issues include:
1) Sudden battery drops for no reason at all. The battery stats look horrible and nothing is draining the phone. See for yourself - added screenshot in the bottom of the post.
The battery drops often lead to a weird flat charge level. For instance, the battery immediately dropped for 20-30% (let's say, leading to a 50% charge), but that that 50% charge can remain for quite a while. Once it was like that even on 1%. Restarting the phone sometimes may bring the battery % up, but still the draining is unbelievable.
2) When the battery is below ~15% all hell breaks loose. I'm loosing the cell signal, sim pin requests pop. Basically, it's either charge the phone at this point or the phone will die in a couple of minutes. If you're using the phone with such low charge, the (what i assume) radio module restart will kill it soon.
Phone never been repaired, the screen is original. Also, the proximity sensor died (i guess) and I've had to flash xposed and install the "turn off prox sensor" module.
What I've already done:
1) Format cache
2) Factory reset
3) Clean flash stock ROM
4) Clean flash other ROMs (currently on Android M Chroma)
5) Flash older stock radio modules (thought it may prevent radio restarts)
6) Limiting my radio to only WCDMA mode (3G or nothing, instead of 2G/3G mode)
7) Replaced the battery few days ago (didn't help at all)
One more thing: my wife has the exact same phone, bought approx. same time ago. Bought from totally different places (one from Poland, second from Italy). Her phone has very similar symptoms, although, not to that extent. It means that her phone battery is also suddenly dropping and sometimes sim pin requests appear, but it's less frequent and not so bad as with my phone.
If you have any ideas how to pinpoint what's wrong or maybe even a solution - that'd be great. Thanks in a advance.
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Probably time for a new battery as the phone has been used for almost 3 years.

It's a number seven in "what I've done" list it was my last resort to change the battery and that didn't help at all (immediately saw the same symptoms). That's why I'm clueless and wondering if the phone is basically dying...
Thanks for the reply though.

Are you sure the replacement battery is good?

audit13 said:
Are you sure the replacement battery is good?
Click to expand...
Click to collapse
Yeah, it's new and bought from the reliable store.

Try the new battery in your wife's phone?

That would require buying one more battery, because the original is so strongly glued to the case, that I will destroy it in the process of taking out (like I did with my own). So not really the best option to continue buying new batteries for allegedly fried phone

I understand. Maybe you need to apply more heat to loosen the adhesive?

Any Luck ?
ravenua said:
Hello all!
So I've owned the N4 since May 2013, it worked great, but right now some severe issues popped up. These issues include:
1) Sudden battery drops for no reason at all. The battery stats look horrible and nothing is draining the phone. See for yourself - added screenshot in the bottom of the post.
The battery drops often lead to a weird flat charge level. For instance, the battery immediately dropped for 20-30% (let's say, leading to a 50% charge), but that that 50% charge can remain for quite a while. Once it was like that even on 1%. Restarting the phone sometimes may bring the battery % up, but still the draining is unbelievable.
2) When the battery is below ~15% all hell breaks loose. I'm loosing the cell signal, sim pin requests pop. Basically, it's either charge the phone at this point or the phone will die in a couple of minutes. If you're using the phone with such low charge, the (what i assume) radio module restart will kill it soon.
Phone never been repaired, the screen is original. Also, the proximity sensor died (i guess) and I've had to flash xposed and install the "turn off prox sensor" module.
What I've already done:
1) Format cache
2) Factory reset
3) Clean flash stock ROM
4) Clean flash other ROMs (currently on Android M Chroma)
5) Flash older stock radio modules (thought it may prevent radio restarts)
6) Limiting my radio to only WCDMA mode (3G or nothing, instead of 2G/3G mode)
7) Replaced the battery few days ago (didn't help at all)
One more thing: my wife has the exact same phone, bought approx. same time ago. Bought from totally different places (one from Poland, second from Italy). Her phone has very similar symptoms, although, not to that extent. It means that her phone battery is also suddenly dropping and sometimes sim pin requests appear, but it's less frequent and not so bad as with my phone.
If you have any ideas how to pinpoint what's wrong or maybe even a solution - that'd be great. Thanks in a advance.
Click to expand...
Click to collapse
I am facing a similar issue, did you find any solution ?

Unfortunately not.
Battery replacement did not help. Also tried replacing charger port controller on the motherboard, but that did nothing as well.
Ended up buying new phone and selling this one for dirt cheap amount of money.

The same started happening to me a couple weeks ago.
I think it's time to change to nexus 5 (or similar)

Same is happening to me, the cheapest solution is to use a power bank as I'm not ready to leave my Nexus 4.

s7 battery problem

I just got my s7 and use for a week. But the battery of my s7 drain very fast. And I can't use other charger to charge except for the original charger. Anyone has the same problem? Is my battery faulty or is there any fix for tat?

I thought the Elephone s7 didn't come out yet, how did you get it?

Preorder
krouri said:
I thought the Elephone s7 didn't come out yet, how did you get it?
Click to expand...
Click to collapse
Bought mine preorder 3.Nov
This is my fifth day with my S7 runs like a charm except some problems regarding incoming call
postimg.org/image/5lnkamd4x/

When you say drain fast, what do you mean? What screen time are you getting? What's the issue with incoming calls?

dave8840 said:
I just got my s7 and use for a week. But the battery of my s7 drain very fast. And I can't use other charger to charge except for the original charger. Anyone has the same problem? Is my battery faulty or is there any fix for tat?
Click to expand...
Click to collapse
I have the S7, 64GB and I also feel the battery drains quite fast. Around 3 Hours screen on time.
Currently trying with disabling the 2nd SIM & also turned the performance setting to low power and but has not made much difference yet.
Also I suspect the "Clear background App" setting/system app is unnecessarily killing apps in the background and causing even more app-restarts. Any way to turn this app off and instead use Greenify ?

dave8840 said:
I just got my s7 and use for a week. But the battery of my s7 drain very fast. And I can't use other charger to charge except for the original charger. Anyone has the same problem? Is my battery faulty or is there any fix for tat?
Click to expand...
Click to collapse
I use my s7 five days and it was fine, tonight phablet did not respond to pressing the power button, left display off, I pressed multifunction button to wake up the device, but nothing happened. I attached charger but after an hour of charging phone is always off. I took away the SIM card and SD memory card and charging unit remained, and after another half-hour phone is always turned off and does not start anymore.
for five hours phone is dead but feels heat in the area of ​​the rear camera ... I think the problem started from the battery, because the same area was heated slightly during charging.

I have got the same problem, the battery is running down too fast. I only have used since last 3 days and I have to charge the battery twice every day. Any solution?

Hi,
No troubles here, battery is fine on my 3G/16G.
Do you have the problem when the phone is as new and wiped out clean from the recovery ?
Can you try this withouth installing anything ?
Best regards

For me, at the end of the day, about 40% of battery left.
I turn the battery pref into low performance, and no problem for my use

I am a light user and I get only 8 to 10 hours with the S7.
I recharged from 12% to 44% in less than 20 minutes,but it seems to empty just as fast.
I have heard that you should let it run down,till it shuts down and then recharge it and that helps the battery life

i have exactly the same problem .. no answer from elephone

vleskos said:
i have exactly the same problem .. no answer from elephone
Click to expand...
Click to collapse
I had same problem with S7 Mini, turned out it was 'Play Services'
Check this link for details. https://forum.xda-developers.com/elephone-s7/help/elephone-s7-mini-terrible-battery-drain-t3560035

Try this.. Go to settings, clear background application,, check all the apps as whitelist. It turns out the phone usually clear background applications, its logic to save battery is by shutting off every app which is running in background, but by doing this, the processor will work harder to bring up every apps back to work which means more energy more energy consumptions.
And turn of your finger print scanner. I did these and got my discharge rate 1%/h in standby.

Cyput said:
Try this.. Go to settings, clear background application,, check all the apps as whitelist. It turns out the phone usually clear background applications, its logic to save battery is by shutting off every app which is running in background, but by doing this, the processor will work harder to bring up every apps back to work which means more energy more energy consumptions.
And turn of your finger print scanner. I did these and got my discharge rate 1%/h in standby.
Click to expand...
Click to collapse
Thanks, testing.
What about the Intelligent battery saving" toggle under battery settings.
I've left it on for now

I switch it on.
Yesterday i got 1 day and 10 hours battery with 3 hours screen on time, it was 17% just before i recharge it. Low power mode

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i did the suggestions but i also found my main culprit was risilo Sync the new name for btsync over night with no WiFi it used 21% battery. Turned off the wake check in settings and added it to greenify.

[RESEARCH] Zenfone 5 1.2Ghz Screen On Time

As the title said, I'm gathering some information about screen on time (SOT) of Zenfone 5 1.2Ghz (from 100 to 1-5 percent)
I want to see how my battery is after years by how much time it can handle now. Hope you guys help me.
In comment section, please including your SOT plus:
- What rom are you using? (Kernel version if can)
- Most used network: Wifi or Cellular
- Network setting: Always on or Never (Manually)
- App ram usage (Running Service in Setting/Battery or Develop Options)
Thats all I want to know for now.
Thanks!

Using stock rom Kitkat newest version, cause it uses much less battery!
I mostly use more of the Wi-Fi on always on
what is mostly using my ram is the screen ( brightness) and android
I will send more information about RAM usage later, my phone is recharging

Using 1.6ghz variant.
rom- resurrection remix nougat. but channging of roms didnt had any great impact
only wifi always on.
ram- 40-50% or below free.
sot i get varies from 2hr- 3hrs. only texting and light stuff gives around 2hr 40mins.

im using latest kitkat on my 3 years old zenfone 5 single sim variant.
this one with 100% cpu usage all time + [ full screen brightness+ bluetooth + wifi+ gps on ] from 100% to 5%;
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This one has only wifi on with full screen brightness 100% to 5%
Click to expand...
Click to collapse

zeetsu said:
im using latest kitkat on my 3 years old zenpone 5 single sim.
this one with full cpu usage + [ full screen brightness+ bluetooth + wifi+ gps on ] from 100% to 5%;
This one has only wifi on and full screen brightness 100% to 5%
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Click to collapse
How long screen on time did you get? That's quite impressive battery graph with wifi and gps always on.

nheolinkin said:
How long screen on time did you get? That's quite impressive battery graph with wifi and gps always on.
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Click to collapse
Screen was always on in both tests. i used battery drain app to make screen always on with full brightness and wifi in second test and i get 3h45m screen time.
in first test i pushed cpu 100% and activated all gps/bluetooth/wifi etc and i get 1h53m screen time. but phone was really overheated and i scare to do it again (it was burning my hand)
actually i was shocked myself when i saw 4 h screen time when i used my phone to only read ebook all day in home with half brightness and i decided to test my phone. Results were amazing i agree, i hope it keeps that way for one more year.
i tested overnight battery usage and it dropped to 85% from 100% within 7 hours with wireless open while android sleep. i guess it might be better to close all network overnights

zeetsu said:
i tested overnight battery usage and it dropped to 85% from 100% within 7 hours with wireless open while android sleep. i guess it might be better to close all network overnights
Click to expand...
Click to collapse
I wish I still kept the screenshot on Mashmallow to show you.
wireless is not the reason but the google play service. After disable a list of unneeded services, I let wireless enable all the time, gmail and other notification still can be recieved and battery drained 1% per hour (screen off). For specifically, after 6 hours over night, it will drain 6%.
screen on time is normally 3 hours but of course I have to tweak a lot to get this result. If not, battery just drains like hell.

nheolinkin said:
I wish I still kept the screenshot on Mashmallow to show you.
wireless is not the reason but the google play service. After disable a list of unneeded services, I let wireless enable all the time, gmail and other notification still can be recieved and battery drained 1% per hour (screen off). For specifically, after 6 hours over night, it will drain 6%.
screen on time is normally 3 hours but of course I have to tweak a lot to get this result. If not, battery just drains like hell.
Click to expand...
Click to collapse
i tried to close wifi yesterday , as you mentioned it does not effect the drain.
3 hours sot on marshmallow is great but unfortunately i cant use custom roms cuz i need Gps occasionaly and my simcard often keep loosing signal on thoose . i am considering to get a xiaomi mi or redmi phone by next year but until that i had to use asus zf5 with kitkat 4.4.2 and 3-3.5 sot is best i can wish for.