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

Nexus 4 doesn't fully charge

I have been experiencing this problem the past weeks, maybe months. The phone won't fully charge and usually stay at a value around 80 - 85%. Sometimes, it even reports to be 100%,and at the moment you unplug it from the wall, it drops to these values. Sometimes, however, it does charge to a full value, but anyway, the battery life is horrible.
Here you have a screens hot of the battery stats.
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The rom I use is cyanogenmod 11. I always have been using this rom, since the moment I purchased the phone.
Like three months ago, my phone dropped to the floor and broke the screen. My home insurance company replaced the screen, so I think, even the phone is a year and three months more or less, I can't call LG for a replacement, can I?
I'm a bit worried because I'm making a long three week trip in some weeks, and I need to have a working phone.
I don't know if going with battery replacement, if try to flash stock and see how it behaves or what to do.
BTW. just for testing if it was the rom or not, I left the phone charging while switched off and got the same results. The original wall charger has the same results as if I charge it with a Samsung charger.
Thanks

I have the exact same problem, I posted about it a couple of days ago.
I have already replaced my battery once, that was almost six months ago, and now, I'm facing the same problem again.
I'm not sure if is only a battery issue, because this is my second battery with the same problem.

There is an app called batterie calibration by néma. I dont want to give up on your batterie/phone, so at least try this app out

I had the same problem with my old phone. What I would do was let the battery run down to 0% and let it switch off. Then i would charge it to 100% and it would work. Its only a temporary solution though as the battery would soon stop charging above a certain percentage after a few days.
I did change the battery on it but i experienced the same problem,it may be that the new battery was also faulty (if it was the battery's fault in the first place). What I did notice though was that when it did not charge above 80 or 85%, when the battery came to about 20% it would stay on 20% longer to compensate for the "lost" percentages. In essence it does charge to 100% it just doesn't show that on that battery bar.
Maybe give this a shot, it might work well for this phone. No harm in trying. You could also try reinstalling the ROM or returning to stock. For me on my old phone returning to stock did the trick.

same problem
i have exactly the same problem,'ive changed two batteries but there's still this problem.
give me a solution please!! i tried different roms, and flashed factory images of android 4.3 nd 4.4.4

It seems to be a common problem with this phone - not charging to its full potential. The other issue I have experienced - the phone goes dead for no reason. After trying a number of time trying to get it to turn on, it eventually does. I am waiting for the day that it actually does just die and I can purchase a more reliable phone.

SandiiDee52 said:
It seems to be a common problem with this phone - not charging to its full potential. The other issue I have experienced - the phone goes dead for no reason. After trying a number of time trying to get it to turn on, it eventually does. I am waiting for the day that it actually does just die and I can purchase a more reliable phone.
Click to expand...
Click to collapse
Something wrong with your phone. There is no such common issue. I've been using this phone since last 4.5 years.
Instead of waiting for it to die, is it not good go ahead and get a new phone?
Nitin

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.

Moto g4 plus battery drain and fast charge!

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I bought this phone last year in july and everything was going pretty smoothly until the nougat update. It completely broke my phone.
MY PHONE GETS FULLY CHARGED IN 30-45 MINS(OBVIOUSLY A BUG).
BATTERY DRAIN IS TERRIBLE, FROM 100% TO 15-20 % IN MAXIMUM 1 HOUR.
PHONE GETS SHUT DOWN ALL OF A SUDDEN AND SHOWS WRONG BATTERY PERCENTAGE.
Now let me tell you all what I have tried to fix this and STILL TRYING. -_-
In January 2017 tried methods like factory reset, clear cache partition etc, nothing works.
Now this month I thought of going back to MM to fix the problem l, that too didn't work.( I downgraded using fastboot)
Again updated to nougat and rooted my phone for the first time, and tried some popular custom recovery. Result = No change what so ever.
Tried Elementalx kernel = No results.
Currently using the Lineage OS 14.1 latest version ( heard it's the most stable CM) = no change even after using some battery optimising apps like greenify.
Attaching battery info screenshot for reference.
If anyone found out any fix to this problem then please tell me. I feel like throwing this piece of **** in the garbage.
PS - while writing the question my battery drained almost 10%

Definitely battery or board problem. Go to service center.

strongst said:
Definitely battery or board problem. Go to service center.
Click to expand...
Click to collapse
I have unlocked my bootloader so I don't think they will help me. Correct me if I am wrong.

callmevish said:
I have unlocked my bootloader so I don't think they will help me. Correct me if I am wrong.
Click to expand...
Click to collapse
There's always a chance if it's a hardware failure of the battery. It depends on the service center. You should give it a try.

strongst said:
There's always a chance if it's a hardware failure of the battery. It depends on the service center. You should give it a try.
Click to expand...
Click to collapse
Okay, thanks for the suggestion.

I think I finally found a solution here!
Try this and let me know if it works for you kr not.
Gonna uodate the thread again if everything works out fine after testing a few more days.
https://forum.xda-developers.com/mo...plus-xt1640-43-athene-npj25-93-t3549369/page3

Did you get the battery drain issue resolved? My g4 plus is having a same issue after bought it a year but rarely use it....now after lightly used for about 15 mins, battery is down 10%. Any help is appreciated.

skytell0123 said:
Did you get the battery drain issue resolved? My g4 plus is having a same issue after brought it a year but rarely use it....now after lightly used for about 15 mins, battery is down 10%. Any help is appreciated.
Click to expand...
Click to collapse
What firmware do you have on your device? Do you have any apps besides the standard stock apps (e.g. Google apps) on your device? How strong is your signal?
You may wish to download Better Battery Stats (free version here: https://forum.xda-developers.com/showthread.php?t=1179809 ) or GSAM Battery Monitor to check if there's any apps or processes draining your battery.
Alternatively, as others have suggested, if there's no obvious draining apps, it could be a firmware issue (try a clean, complete firmware flash) or a battery issue.

echo92 said:
What firmware do you have on your device? Do you have any apps besides the standard stock apps (e.g. Google apps) on your device? How strong is your signal?
You may wish to download Better Battery Stats (free version here: https://forum.xda-developers.com/showthread.php?t=1179809 ) or GSAM Battery Monitor to check if there's any apps or processes draining your battery.
Alternatively, as others have suggested, if there's no obvious draining apps, it could be a firmware issue (try a clean, complete firmware flash) or a battery issue.
Click to expand...
Click to collapse
1. What firmware do you have on your device? I have the original unrooted stock rom running Android 7.0 and just checked no update needed.
2. Do you have any apps besides the standard stock apps (e.g. Google apps) on your device? The G4 plus is showing i have 133 app installed and currently running Nova Launcher.
3. How strong is your signal? I am setting it at Airplane mode while turning wifi on just to listen to music and surf the web.
I will download the Better Battery Stats and GSAM Battery Monitor to monitor the battery performance.
Thanks for your reply.

A possible cause is that the connector between battery and motherboard is loose (so that the accu cannot give full power to the motherboard). To fix this, you need to open your phone with a t4 torx screwdriver and tweezers (look for the instruction videos on this on youtube). Disconnect and reconnect the battery cable connector to the motherboard and make sure it is well fixed.
In my case this worked like a charm, I also noticed that next to the battery having normal behavior again, the phone was also much faster. Apparently the processor speed was also tuned down as the battery could not give full power before applying this fix. Saved me 25 / 70 / 230 euros (new battery / new battery with service costs / new phone)

Rinthros said:
A possible cause is that the connector between battery and motherboard is loose (so that the accu cannot give full power to the motherboard). To fix this, you need to open your phone with a t4 torx screwdriver and tweezers (look for the instruction videos on this on youtube). Disconnect and reconnect the battery cable connector to the motherboard and make sure it is well fixed.
In my case this worked like a charm, I also noticed that next to the battery having normal behavior again, the phone was also much faster. Apparently the processor speed was also tuned down as the battery could not give full power before applying this fix. Saved me 25 / 70 / 230 euros (new battery / new battery with service costs / new phone)
Click to expand...
Click to collapse
Thanks a lot Rinthros for your solution. My Moto G4 Plus caused same issue after having overnight charging for two consecutive nights. 2nd day morning I realized that my phone discharged with normal use in only 1 hour. And after get fully charged in only 30 minutes. It felt very sad but then found this solution by Rinthros. I did exactly the same. Opened my phone with t4 for screwdriver and disconnected battery connectors and just reconnected it. It worked for me exactly smooth and amazing. Now after doing so from last 3 days my phone working as it was previously.
Thanks a lot for your solution Rinthros.
:fingers-crossed::good:

I too had the same problem but actually this occurs after updating it to Oreo my battery is not fully charging and after unplugging battery percent remains same got stuck after 1hr of usage device gets shutdown due to low battery all these problem are only in stock Oreo so I downgraded to marshmallow everything works fine after a battery calibration I dont know what was the problem on Oreo guys pls help me to fix it

Thanks a lot Rinthros. My battery was original from 2016 and tired. I decided to buy a new and followed an instruction on the net. After a day or two I noticed rapid drain and quick charge . In the end I had 30 min of use before I needed to charge again. I opened the unit and, for sure, the connection between battery and motherboard was loose. Fixed this and this was very successful. Two hours later, after re-charge, my Moto 4 is still on 94%. My theory is that a floor-drop caused the disconnect. I visited another forum in search for a solution, but nothing helped. I think this solution applies to other versions of Moto. Please Lenovo, listen to Rinthros, this can save you a lot of customers. Moto is a greate phone and deserves better support.