Database Info

Phone shuts off all the time

Hey everyone, thanks for looking at this and hopefully helping me out. I'm new to rooting my phone and installing new roms and stuff, but I researched about as much as I could for about a week before I even rooted.
Now I've moved on and installed a new rom (CM7). Before installing I used clockwork and formated the /system, /data, /cache, and dalvik. At first everything was ok, but after about 15 minutes it turned off. I read up on battery problems, so kept my phone plugged in all weekend (got up to 4.196V-ish, with 0mA in or out) then deleted the battery file, rebooted, unplugged the phone and let it drain completely (even while it still had a charge it would turn off randomly but I figured it would be ok). After it was completely drained I completely charged it again and it still randomly turns off.
At first I thought maybe it was just the rom, but no one else seems to have the same problem as me (that I can find), so I downloaded an ICS rom to try that. Same problems. So far I have done the following to try and find out WTF is going on...
Installed Elixr to see battery drainage (sitting at main screen doing nothing its roughly -8mA, but right after boot or opening a program it jumps to -300mA to -480mA)
Done NUMEROUS battery pulls (with and without deleting the battery config file)
Switched ROMS
Any help would be amazing
PS: Before rooting or flashing a new mod my phone would shut off on its own, but only once a week, maybe. Now it turns off as soon as I unlock my sim card. However, it doesn't turn off at all if I have it plugged in.

spcclark said:
Hey everyone, thanks for looking at this and hopefully helping me out. I'm new to rooting my phone and installing new roms and stuff, but I researched about as much as I could for about a week before I even rooted.
Now I've moved on and installed a new rom (CM7). Before installing I used clockwork and formated the /system, /data, /cache, and dalvik. At first everything was ok, but after about 15 minutes it turned off. I read up on battery problems, so kept my phone plugged in all weekend (got up to 4.196V-ish, with 0mA in or out) then deleted the battery file, rebooted, unplugged the phone and let it drain completely (even while it still had a charge it would turn off randomly but I figured it would be ok). After it was completely drained I completely charged it again and it still randomly turns off.
At first I thought maybe it was just the rom, but no one else seems to have the same problem as me (that I can find), so I downloaded an ICS rom to try that. Same problems. So far I have done the following to try and find out WTF is going on...
Installed Elixr to see battery drainage (sitting at main screen doing nothing its roughly -8mA, but right after boot or opening a program it jumps to -300mA to -480mA)
Done NUMEROUS battery pulls (with and without deleting the battery config file)
Switched ROMS
Any help would be amazing
PS: Before rooting or flashing a new mod my phone would shut off on its own, but only once a week, maybe. Now it turns off as soon as I unlock my sim card. However, it doesn't turn off at all if I have it plugged in.
Click to expand...
Click to collapse
Well, if you were having this issue before the rooting took place, this very well may be hardware related. There are a few things I recommend before the dreaded unroot and send back to manufacturer route (assuming the phone is under warranty still). It's been proven or at least shown that battery calibration (the whole charge to 0Ma and then fully discharge and then recharge) is a pipe dream.
I would first say find out if the CM7 ROM you're using is OCing or UVing, while you may see some people OCing to 1.3 or higher and UVing -75, not all phones are created equal in capabilities and some phones will randomly freeze/turn off if they don't like your OC and UV settings. I would also suggest flashing a different ROM to see if this problem persists. Cleardroid is what I recommend just to get an idea if it is in fact a OC or UV problem as I believe cleardroid is set up to default stock settings.
You can also try a new battery, I have heard/read/seen that bad batteries can cause reboots. Again though if this was an issue you were sometimes experiencing before, you may have hit the tip of the iceberg on a hardware issue and its finally starting to show now. Hope this helps.

spcclark said:
Hey everyone, thanks for looking at this and hopefully helping me out. I'm new to rooting my phone and installing new roms and stuff, but I researched about as much as I could for about a week before I even rooted.
Now I've moved on and installed a new rom (CM7). Before installing I used clockwork and formated the /system, /data, /cache, and dalvik. At first everything was ok, but after about 15 minutes it turned off. I read up on battery problems, so kept my phone plugged in all weekend (got up to 4.196V-ish, with 0mA in or out) then deleted the battery file, rebooted, unplugged the phone and let it drain completely (even while it still had a charge it would turn off randomly but I figured it would be ok). After it was completely drained I completely charged it again and it still randomly turns off.
At first I thought maybe it was just the rom, but no one else seems to have the same problem as me (that I can find), so I downloaded an ICS rom to try that. Same problems. So far I have done the following to try and find out WTF is going on...
Installed Elixr to see battery drainage (sitting at main screen doing nothing its roughly -8mA, but right after boot or opening a program it jumps to -300mA to -480mA)
Done NUMEROUS battery pulls (with and without deleting the battery config file)
Switched ROMS
Any help would be amazing
PS: Before rooting or flashing a new mod my phone would shut off on its own, but only once a week, maybe. Now it turns off as soon as I unlock my sim card. However, it doesn't turn off at all if I have it plugged in.
Click to expand...
Click to collapse
I guess the issue is with the battery itself. Try getting a new battery. I heard some guys experiencing the same and sorting things out replacing the battery....

Leave the charger plugged in. If it doesn't reboot then that will let you know most likely it is the battery.

Agoattamer said:
Leave the charger plugged in. If it doesn't reboot then that will let you know most likely it is the battery.
Click to expand...
Click to collapse
That was my thoughts exactly. However, if the ROM or kernel or whatever is set to shut off the phone at a certain reading of discharge from the battery, ie -500mA, this could also be the problem.
I thought it could have been a problem with the phone as well, but before it would shut off on its own MAYBE once a month. 90% of those I attributed to overloading the phone, closing facebook, opening the internet, starting to load a webpage then open a new txt I just recieved while the phone was still vibrating type things.
Now it still feels like it's just quitting on me, it never turns off while the screen is locked or while its charging. So far after the new ROM it has shut off when I place a call, when I receive a call, clicking on a notification, opening the messaging app, clicking download in the market, and my favorite when I unlock it from sleep.
I will download a different rom right now and try it. Just to double check this is what I've been doing to install a new rom... I boot my phone into recovery (vol- and power), go to recovery from the boot screen (opens clockworkmod), scroll down to mounts and storage, have it format /system, /data and /cache, go back to wipe data/factory reset, then install zip from sdcard, select the rom and go... I know some roms require inspiremod, should I still install this if I'm USING an inspire??
Thanks for the input guys, I really appreciate it

If it does turn out to be the battery or you just decide to get a new one to test it out. I recommend these, they are awesome and the only thing anyone should try besides HTC factory replacements. Good luck and I hope this works out for you.
Anker Batteries

i only skimmed this. but cleaning battery contacts can help also check the side door, sometimes that can cause issues as well. air can out everything and clean metal contacts with rubbing (ipa) alcohol.

So I installed cleardroid. Once again everything worked fine for the first 10-15 minutes and then the shutdowns started again, always when making the phone do something (unlocking, clicking a notification, opening a program, etc) but never when the phone is charging.
I'll clean off every bronze or gold contact I can find but I think I might be fighting a lost cause lol. Three different ROMS, all with the same problem leads me to believe its a hardware issue. Since all the chips in these phones are all small and use multilayer boards I won't be able to replace anything myself so I see a new phone in my near future.
Thanks guys!

If it doesn't do it when its chargeing then it is the battery. I had bought my inspire from someone and it was having those issues ordered a new HTC stock battery from newegg for like $12 and has been working perfectly since then and honestly if you want the best battery rom absolution is the rom you should check out. It's a non sense rom but again I'd just buy a new battery. I had mine timed it'd reset at 92% 74% and 49% xD
Sent from my Inspire 4G using xda premium

spcclark said:
So I installed cleardroid. Once again everything worked fine for the first 10-15 minutes and then the shutdowns started again, always when making the phone do something (unlocking, clicking a notification, opening a program, etc) but never when the phone is charging.
I'll clean off every bronze or gold contact I can find but I think I might be fighting a lost cause lol. Three different ROMS, all with the same problem leads me to believe its a hardware issue. Since all the chips in these phones are all small and use multilayer boards I won't be able to replace anything myself so I see a new phone in my near future.
Thanks guys!
Click to expand...
Click to collapse
hmm, I would say try a new battery before getting a new phone. Worst case scenario is that you spent $15 to learn you need a new phone as opposed to spending $100+ on a new phone...this is of course assuming you want to keep the inspire and not just looking for a reason to get upgrade ahaha

I agree. It still sounds like a battery issue.

I would agree this definitely sounds like an internal short in the battery. Sounds like it's shutting off whenever it gets a significant load on it. Try a new battery first.

I had a similar issue though I was tweaking the CPU. Learned my lesson.
Sent from my Inspire 4G using XDA App

Yeah, Id bet money that its a bad battery. I had this same exact issue with my Inspire. If it shuts off more in low reception areas but it isn't shutting off when plugged in, its definitely the battery. I would try to find someone with an Inspire and try switching them batteries and see if it stops.

If I tried to use the flash with my camera, the phone would shut off. My phone would randomly reboot or turn off. ATT told me they had "some" bad batches of batteries. My phone was still under warranty so ATT sent me a new battery. All the problems went away!

The battery door on the Inspire becomes wonky the more you open it, I was having a problem like yours, new battery and new door has me going good.

[Q] Phone restarts randomly

Hi! Sorry if this was posted in the wrong forum, im new here :laugh:
I installed Fallout V 4.3.0 on my HTC DS and everything was working fine. But then suddenly my phone started to restart randomly. 1-2 minutes after booting it restarts again. If i take out the battery, wait 1 minute, and the put i back in the phone starts automatically again. Then another 1-2 minutes before restart loop.
This does not happen when the charger is plugged in. First thing i thought was a battery-issue, but this happened after flashing a ROM, so?
The phone was working fine on Fallout V 4.0.0, problem occured when updating.
-I wiped everything before installing the ROM.
-Have tried to reinstall Fallout, same problem
-Have tried to install Endimyon, same problem.
Information about the phone:
Current ROM: [Endymion V3.5|Sense 3.5|GB 2.3.5][kernel V2.2|ControlCenter]
Hboot: 6.98.1002
Radio: Default
S-off
Would appreciate some help, as my phone is useless atm! :crying:

Hello,
Maybe this should be posted in the Fallout thread (however you have to make 10 posts before being able to post in the dev section...). Up to the moderators to move your thread or not
I have had some similar issues after flashing Fallout, except my phone didnt reboot but it just went off a couple of minutes after i tuned it on. Although this just seemed to happen once. After I turned it on again, everything ok until I charged it to 100%, turned it on again - and same issue.
I then flashed CM9, same issue.
I read somewhere that it might be a charge level display issue : when you plug the phone in charge and unplug it right away, battery indicator will say it is charged to 100% - while obviously it is not...
Hope that will help you.

nuts77 said:
Hello,
Maybe this should be posted in the Fallout thread (however you have to make 10 posts before being able to post in the dev section...). Up to the moderators to move your thread or not
I have had some similar issues after flashing Fallout, except my phone didnt reboot but it just went off a couple of minutes after i tuned it on. Although this just seemed to happen once. After I turned it on again, everything ok until I charged it to 100%, turned it on again - and same issue.
I then flashed CM9, same issue.
I read somewhere that it might be a charge level display issue : when you plug the phone in charge and unplug it right away, battery indicator will say it is charged to 100% - while obviously it is not...
Hope that will help you.
Click to expand...
Click to collapse
Thanks for replying! Was going to post in the dev section indeed, but i dont have 10 posts... But i found out, if i turn on "screen always on" setting, the phone does not restart. Hmm...

superlorre said:
Thanks for replying! Was going to post in the dev section indeed, but i dont have 10 posts... But i found out, if i turn on "screen always on" setting, the phone does not restart. Hmm...
Click to expand...
Click to collapse
have you try a reflash

zerokoolmyth said:
have you try a reflash
Click to expand...
Click to collapse
Yes. Do you think buying a new battery will do the trick?

Time for the really stupid question - but it is the old one and has been a problem for many people (including me).
Have you tried to insert a piece of paper, folded so it is 3 or 4 sheets thick, in between the battery and the back of the phone when you insert it? There is a manufacturing tolerance which can cause the battery to move and lose connection to the contacts sometimes.
It's probably not the solution for you, but it's a damn sight cheaper than buying a new battery immediately.

SimonTS said:
Time for the really stupid question - but it is the old one and has been a problem for many people (including me).
Have you tried to insert a piece of paper, folded so it is 3 or 4 sheets thick, in between the battery and the back of the phone when you insert it? There is a manufacturing tolerance which can cause the battery to move and lose connection to the contacts sometimes.
It's probably not the solution for you, but it's a damn sight cheaper than buying a new battery immediately.
Click to expand...
Click to collapse
Thanks for answering, but i've tried that... The weird thing is that if i turn on the setting "screen always on", the phone does not restart. Or if the charger is plugged in. It only restarts some seconds after the screen goes black (inactivity) or if i press the power button.

Sadly I don't have an answer for you, however, I wanted to recommend that you avoid taking your battery out as that can cause damage to the emmc chip and thus brick your phone
Sent from my Desire S using xda app-developers app

mzr92 said:
Sadly I don't have an answer for you, however, I wanted to recommend that you avoid taking your battery out as that can cause damage to the emmc chip and thus brick your phone
Sent from my Desire S using xda app-developers app
Click to expand...
Click to collapse
Thanks for the warning, but i really dont care about the emmc chip now You see, if the battery is in the phone starts itself automatically...

I would have to say it's the rom. Did you back it up?
Sent from my Nexus S 4G using Tapatalk 2

PROPAIN2112 said:
I would have to say it's the rom. Did you back it up?
Sent from my Nexus S 4G using Tapatalk 2
Click to expand...
Click to collapse
Have wiped everything, reflashed Fallout ROM, didnt work. Wiped everything, restored NANDROID backup to Endimyon, didnt work either...

superlorre said:
Thanks for answering, but i've tried that... The weird thing is that if i turn on the setting "screen always on", the phone does not restart. Or if the charger is plugged in. It only restarts some seconds after the screen goes black (inactivity) or if i press the power button.
Click to expand...
Click to collapse
Don't worry about the eMMC chip that the other poster mentioned - the problem is not caused by removing your battery - it is caused by not removing it properly, or by removing and reconnecting it quickly which means there is still residual charge when it reconnects.
Given the more detailed description, I assume you have a custom ROM running? If so then try two things
1) Try to decrease the under-voltage settings by 50mV
2) Increase the minimum CPU speed.
It sounds like the phone is going to sleep, but is slowed down too much and a reboot is forced.
Sent from using the power of my mind.

SimonTS said:
Don't worry about the eMMC chip that the other poster mentioned - the problem is not caused by removing your battery - it is caused by not removing it properly, or by removing and reconnecting it quickly which means there is still residual charge when it reconnects.
Given the more detailed description, I assume you have a custom ROM running? If so then try two things
1) Try to decrease the under-voltage settings by 50mV
2) Increase the minimum CPU speed.
It sounds like the phone is going to sleep, but is slowed down too much and a reboot is forced.
Sent from using the power of my mind.
Click to expand...
Click to collapse
Tried your suggestion, but no luck. Will buying a new battery give me any chance?

It might do. I would be tempted to find a phone shop and ask them if you can test your phone with a battery from them before buying it though - just in case it is something else causing this.
Sent from <redacted in the interests of global security> using the power of my mind.

Hy Guys!
My DS is doing the same thing after I istalled the ICE DS 5.1. Funny thing is it started only after 1 day. It was working perfectly until it restarted after pressing the power button. I've tried different ROMs (CM 7.2; Fallout 5) but it happend almost instantly. Also tried the CPU voltage, no result.
I'm curious superlorre if the new battery did the trick?
Or is there a thread I missed where the problem got solved?
Thanks in advance.

No matter what i do -- Random Reboots.

As the title says.. No matter what i do i.e. change roms, kernels.. etc im getting random reboots..
i can say that it started doing this after i wiped battery stats.. ( i think )
it doesnt reboot when the phone is plugged in and it doesnt reboot ALL the time.. Maybe 2-4 times a day..
the phone reboots when im doing something say, when i click to snap a picture, when i press the answer button on a call, when i press send when in a text message.. stuff like that nature.. doesnt happen all the time tho.. but it does happen a few times everyday.
I do not oc to enormous amounts lol.. i never go past 1.5 and i mostly keep it at 1.2.. but like i said, all this random rebooting just happen all a sudden. been going on for about 2 weeks now..
i have noticed after i wiped battery stats (few weeks ago) that my battery is not consistent.. meaning when the screen is on, my battery is at say 70% but when i go into 4ext the battery displays 61% but then when i turn back on the phone, itll say another random number..
Yes, i re calibrated my battery -- when it was at 100 i hit calibration, i let the phone die, i let it charge back up untouched, do a few charge cycles, and it still hasnt fixed the battery issue..
i have the latest radio, firmware and hboot.. ive tried changing roms, changing kernels, and when i change roms i dont install anything (thinking it might be a bad app) i leave the rom as it came and it still reboots..
idk what else to do, im getting annoyed.. your thoughts?

... dang
with 175 views i guess no one knows..
my problem is un fixable apparently =/

it seems you havent tried this fix

ganeshp said:
it seems you havent tried this fix
Click to expand...
Click to collapse
This solved it for me, no reboots for weeks now!
Sent from my HTC Sensation using xda app-developers app

Random reboots
This thread is long, but are we saying that messing with the battery connectors fixes this and it is a hardware fault?
I get occasional reboots with CYANOGEN Rom when I am trying to turn WIFI on, but just accept it as the rest of the ROM is great.
I also get it sometimes when I disconnect USB, especially if I forget to turn USB off, either at the phone or the PC end
I have also found that it seems to be ROM dependent. In my experience I get random reboots constantly on VIPER, less often on ELEGANCIA, never on Android REVOLUTION and the WIFI issue with Kang 10 Cyanogen.
I would love to think it would all go away by sticking a piece of business card at the top of my battery; )

ganeshp said:
it seems you havent tried this fix
Click to expand...
Click to collapse
ha, ima try that right now.. thanks!

seems like that solution fixed it.. :laugh:
a whole day without rebooting.. hopefully it lasts :fingers-crossed:
thanks guys :good:

[Q] Sensation not working

Hello,
I am an owner of HTC Sensation, rooted with Android Revolution 7.3.
My phone has ~1,5 years, since its first days i was using Android Revolution ROM, never had any problem.
Today, my phone first lost signal. Itcould not connect to any mobile network so I tried to restart it, when i got back to it after 5 minutes, the phone was stuck on beats audio logo and when i touched it, it felt very hot, it was never that hot even I used it for hours playing some games or browsing internet. (I think it was processor, down side of the phone, below battery, but because of that battery got a bit hotter too) I had to pull off the battery, I've waited till it got cold and tried to run again but rom was not working so i reflashed it from my sd card, after the next restart (phone did not get hot) when phone was checking installed apps, it simply turned itself off. Before battery showed around 80% charged, after reinstall 30% and it happened in max 10 minutes ,but after that shut down I could not turn it on. LED was not working, I tried pulling off battery, charging it, charging without abttery then connecting it, trying to reboot with abs but PC could not see the device.
The only thing I noticed, when i was trying tocharge it for the first time, processor was getting hotter but LED was not working, but then, it simply went cold.
I have no idea what I could do more here, it looks like hardware problem but te only thing i could not check was putting a new battery and try it then. Is there anything I can do more about it?
For any help, thank you.
PS: When the phone 'died' it was using faux123's 1,5 GHz kernel which came with the ROM. AsI said, before this event, everything was working perfectly, no sign of this incoming event. No restarts, freezes or crashes.
*If it matters, i was charging phone every 4-5 days, never let it go below 10%, bettery is from HTC EVO 1730mAh (original).

can you boot to the bootloader?
if yes do it and select from there reboot
see how it goes

rzr86 said:
can you boot to the bootloader?
if yes do it and select from there reboot
see how it goes
Click to expand...
Click to collapse
I can do nothing. No reaction.

MarcBliz said:
I can do nothing. No reaction.
Click to expand...
Click to collapse
try this
remove battery,sim and sdcard and charge as it is for 4-5 hours
put them back and switht it on
see how it goes
also give it a try with a different battery
if everything fails then try this
http://forum.xda-developers.com/showthread.php?t=1522351
i am not sure if you will have much hope but try it anyways

rzr86 said:
try this
remove battery,sim and sdcard and charge as it is for 4-5 hours
put them back and switht it on
see how it goes
also give it a try with a different battery
if everything fails then try this
http://forum.xda-developers.com/showthread.php?t=1522351
i am not sure if you will have much hope but try it anyways
Click to expand...
Click to collapse
Re-tried these methods, hoped I had done soemthing wrong before. I saw the artice before, was hoping there are different ways to revive the phone. Tried this, says device not found. Looks like the only method would be this JTAG box but it's a bit expensive or try to send it to repair.
Anyway thank you for your time, I appreciate it.
-And if I might ask, any idea why the phone heated up itself on nearly last startup as I mentioned in my thread? It would be allright if the phone just died before this event, now it just makes me think there might be bigger hardware problem which just caused the death and it's not worth repair.

Phone shutting down at random %ages (50, 60, 40+)

Hi All,
I'm facing a weird issue with my phone from more than 2 months and it has reached a frustrated level now. It used to shut off at levels like 15%, sometimes between 15-25%. But nowadays, it shuts down automatically at 40-60% and that is really unreliable. So, i wanted to check if there are other people facing the same issue or is it only my device. Please share your views, any possible solutions, possible reasons, and if applicable, similar experiences.

thanks for the info, i got my oneplus one back in 2013, hopefully it will not shutdown after a while. i have not found such problem and hope i will not in the future as i want to have the phone for at least 5 years

karthics4 said:
thanks for the info, i got my oneplus one back in 2013, hopefully it will not shutdown after a while. i have not found such problem and hope i will not in the future as i want to have the phone for at least 5 years
Click to expand...
Click to collapse
Well i do hope you won't face any issues with your phone. But this is totally weird. This is making my phone unreliable for me.
Sent from OnePlus One

abhibnl said:
Hi All,
I'm facing a weird issue with my phone from more than 2 months and it has reached a frustrated level now. It used to shut off at levels like 15%, sometimes between 15-25%. But nowadays, it shuts down automatically at 40-60% and that is really unreliable. So, i wanted to check if there are other people facing the same issue or is it only my device. Please share your views, any possible solutions, possible reasons, and if applicable, similar experiences.
Click to expand...
Click to collapse
Clear all data from recovery and reflash system with fastboot images. http://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541

kushal.purkar said:
Clear all data from recovery and reflash system with fastboot images. http://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541
Click to expand...
Click to collapse
If you won't mind asking, how actually will that help with this issue? I'm just curious to know

abhibnl said:
If you won't mind asking, how actually will that help with this issue? I'm just curious to know
Click to expand...
Click to collapse
I had the same issue after I updated to MM and recently after latest update also. I had to do the same thing. Reason behind that was xposed was incompatible. But as I flashed everything. (/system/data too ) now its working fine

kushal.purkar said:
I had the same issue after I updated to MM and recently after latest update also. I had to do the same thing. Reason behind that was xposed was incompatible. But as I flashed everything. (/system/data too ) now its working fine
Click to expand...
Click to collapse
Thanks for the details. Unfortunately, i would need some time to perform this as i barely get time to flash roms. Thanks again!
Sent from OnePlus One

Dude... just get a new battery...

Traace said:
Dude... just get a new battery...
Click to expand...
Click to collapse
Just the answer i was looking for [emoji106] [emoji106]
Sent from OnePlus One

abhibnl said:
Well i do hope you won't face any issues with your phone. But this is totally weird. This is making my phone unreliable for me.
Sent from OnePlus One
Click to expand...
Click to collapse
thanks so much, bought it after my nexus4 died which im still sad about because its one of my 1st real android phones after having a contract android phone.

As an update, i kept my phone on charge for straight 4-5 hours. and now it shuts down after 20-25%. Definitely an improvement. But still it's a mystery why does it show this bug in the first place.

Umm, how has no one mentioned maybe trying battery calibration!? Seems like a fairly obvious first step here to take before swapping out for a new battery.. Plug the phone in and let it charge entirely. Even at 100% in Settings > Battery it will still show "100% - Charging on AC" (or USB whatever you've got connected)
You need to wait for that to turn into "100% - Charged." Then, calibrate using any battery calibration app from the playstore, ( I use this one )
After it charges to 100% - Charged, hit "calibrate" in the app, disconnect the charger, and let it drain entirely. You might find it dying out before 0% once again, but this hopefully should have been the last time. Plug the phone in and switch it on as soon as you can while it starts to charge. Let it charge uninterruptedly to 100% - Charged, again.
Not saying this might solve it 100% but it is an option to try.

GuitarGuy96 said:
Umm, how has no one mentioned maybe trying battery calibration!?[emoji14]Seems like a fairly obvious first step here to take before swapping out for a new battery.. Plug the phone in and let it charge entirely. Even at 100% in Settings > Battery it will still show "100% - Charging on AC" (or USB whatever you've got connected)
You need to wait for that to turn into "100% - Charged." Then, calibrate using any battery calibration app from the playstore, ( I use this one )
After it charges to 100% - Charged, hit "calibrate" in the app, disconnect the charger, and let it drain entirely. You might find it dying out before 0% once again, but this hopefully should have been the last time. Plug the phone in and switch it on as soon as you can while it starts to charge. Let it charge uninterruptedly to 100% - Charged, again.
Not saying this might solve it 100% but it is an option to try.
Click to expand...
Click to collapse
Well already tried and i may sound a bit silly, but studies have proved that battery calibration is a myth. Android automatically cleans the batterystats.bin file after every single full charge. Rest assured, i have already done that with no avail.
Sent from OnePlus One

I had the same problem, phone was switching off @ 40% and at times @35%. Battery calibration certainly helped. No more problems now. Works well if the phone is rooted.