When my phone battery 45% its dead - General Questions and Answers

hello i have a problem with my xiaomi redmi note 2,im installing lineage OS 16 and its work fine but i feel weird about my phone battery indicator,when i using it its feel like my battery lasts a long time but turns out I was wrong,when my phone battery at 45% its dead and when i check the battery its empty ,so what should i do now ?.
I will be very grateful if anyone can help me

Look inside here:
How to Check Battery Health on an Android Phone
Wondering how to check battery health on Android? Learn how to see and monitor your Android phone's battery health.
www.makeuseof.com

jwoegerbauer said:
Look inside here:
How to Check Battery Health on an Android Phone
Wondering how to check battery health on Android? Learn how to see and monitor your Android phone's battery health.
www.makeuseof.com
Click to expand...
Click to collapse
I have checked this website but there is no method for my problem, besides this website only seems to tell me how to keep the battery healthy, besides my battery is not damaged,its the indictor this problem started happening after I installed the pie rom, before installing this rom I tried the oreo rom and my battery were the same before i switched to custom rom,is this the bug of the rom ?

Ubisoft3.0 said:
I have checked this website but there is no method for my problem, besides this website only seems to tell me how to keep the battery healthy, besides my battery is not damaged,its the indictor this problem started happening after I installed the pie rom, before installing this rom I tried the oreo rom and my battery were the same before i switched to custom rom,is this the bug of the rom ?
Click to expand...
Click to collapse
If your SOT run time is normal, the battery is most likely ok.
There are edits you can do if rooted but that's beyond my knowledge as to where/how to access them.
Otherwise try a battery calibration by charging to 100%, run until low battery shutdown, repeat.

blackhawk said:
If your SOT run time is normal, the battery is most likely ok.
There are edits you can do if rooted but that's beyond my knowledge as to where/how to access them.
Otherwise try a battery calibration by charging to 100%, run until low battery shutdown, repeat.
Click to expand...
Click to collapse
I already do that yesterday till today there is no change

Ubisoft3.0 said:
I already do that yesterday till today there is no change
Click to expand...
Click to collapse
Use the battery voltage to estimate the charge state of the battery.
If all that's wrong is a misreading you could just adapt to it.
You can try a hard reset (simulates pulling battery) and clearing the system cache but I doubt that will help. Worth a try.

blackhawk said:
Use the battery voltage to estimate the charge state of the battery.
If all that's wrong is a misreading you could just adapt to it.
You can try a hard reset (simulates pulling battery) and clearing the system cache but I doubt that will help. Worth a try.
Click to expand...
Click to collapse
When you say hard reset do you mean reset my phone to factory settings or delete all of my data from twrp ?

Ubisoft3.0 said:
When you say hard reset do you mean reset my phone to factory settings or delete all of my data from twrp ?
Click to expand...
Click to collapse
It simulates pulling the battery and doesn't touch any data.
It's usually done but holding the volume control and power buttons down until it reboots on my N10+ if I recall correctly. It's hard to find this with a Google search but the instructions are out there, somewhere.
Of course if you have physical access to the battery you can simply disconnect/reconnect it.

blackhawk said:
It simulates pulling the battery and doesn't touch any data.
It's usually done but holding the volume control and power buttons down until it reboots on my N10+ if I recall correctly. It's hard to find this with a Google search but the instructions are out there, somewhere.
Of course if you have physical access to the battery you can simply disconnect/reconnect it.
Click to expand...
Click to collapse
okay I'll try it later but if it doesn't work I'll go back to oreo again, and thank you for the help

Ubisoft3.0 said:
okay I'll try it later but if it doesn't work I'll go back to oreo again, and thank you for the help
Click to expand...
Click to collapse
On rooted phones there's a file edit you can do to fix that. I've seen it on XDA before. It doesn't apply to me so it was a curiosity.
Sorry I can recall the thread or file name.
Try this.
Try this Google search: fix battery percentage,xda rooted
Or something similar.

blackhawk said:
On rooted phones there's a file edit you can do to fix that. I've seen it on XDA before. It doesn't apply to me so it was a curiosity.
Sorry I can recall the thread or file name.
Try this.
Try this Google search: fix battery percentage,xda rooted
Or something similar.
Click to expand...
Click to collapse
My problem solved,its because the kernel when i try to reinstall my rom without installing the KERNEL then when i try it, my battery back to normal .

Related

Why is Android's battery always so darn inaccurate

My icon in the notif bar looks like 80% and it is 40% lol. I don't get it.
hah2110 said:
My icon in the notif bar looks like 80% and it is 40% lol. I don't get it.
Click to expand...
Click to collapse
Strange, I haven't noticed this.
1) What phone are you using
2) What ROM are you running
3) Have you wiped your phone along with the cache?
akapoor said:
Strange, I haven't noticed this.
1) What phone are you using
2) What ROM are you running
3) Have you wiped your phone along with the cache?
Click to expand...
Click to collapse
Almost every Android phone. It is a known problem.
I don't seem to have an issue with it.
When it reaches 75%, my bar is 3/4s. When it's 50, its half-way...etc...etc...
hah2110 said:
Almost every Android phone. It is a known problem.
Click to expand...
Click to collapse
Awsome job answering 3 questions with a random statement.
I know the phone stores the info about the battery in a file. This file includes the max charge the battery can charge too. There is a method somewhere on these forums that show how to drain your battery, wipe the file, then do a full charge so the phone can relearn the battery and the correct settings get saved.
I believe flashing new roms and doing storage wipes can cause this file to be removed and created with false info.
WoZeR said:
Awsome job answering 3 questions with a random statement.
I know the phone stores the info about the battery in a file. This file includes the max charge the battery can charge too. There is a method somewhere on these forums that show how to drain your battery, wipe the file, then do a full charge so the phone can relearn the battery and the correct settings get saved.
I believe flashing new roms and doing storage wipes can cause this file to be removed and created with false info.
Click to expand...
Click to collapse
No... It has nothing to do with this. Every Android phone I've had... Regardless of whether it is brand new, stock, rooted, flashed, new kernel, anything... Doesn't matter.
May I know how many android phones you previously had?
not trying to flame btw.. but i dont have that case with my phone.. and this is my first phone
You have tokinda program the Lion Batt internal charger first, you charge them full->run till dead--> repeat process 2 times and then the system will be way more accurate. Try this and reply in about 3 days the results.
lagu805 said:
May I know how many android phones you previously had?
not trying to flame btw.. but i dont have that case with my phone.. and this is my first phone
Click to expand...
Click to collapse
John512 said:
You have tokinda program the Lion Batt internal charger first, you charge them full->run till dead--> repeat process 2 times and then the system will be way more accurate. Try this and reply in about 3 days the results.
Click to expand...
Click to collapse
You guys are still missing it. The ICON is not accurate but the internal sensor is. Jeebus. Look at these links... and it seems as my answer is in the first two sentences:
http://senk9.wordpress.com/2010/06/07/android-app-of-the-day-battery-left-widget/
http://www.androidjunkies.com/index...ets-you-keep-watch-of-your-power-app-reviews/
Honestly, if "it" truly bothers you, why not just put the overlay ontop so you get the "real" percentage.
It's work just fine for me, usually +/- 3% at most, works great on froyo.
Calibrate if it is way off
Sent from my HTC Magic using XDA App
I'm trying to understand how android calculates battery percentage, and from my testing it seems that the battery meter is hard coded into each particular phone model. This link seems to kinda verify this.
http://www.android-x86.org/documents/howtoconfigurebatteryservice
Does anyone know where in the system the battery file is located? Either the battery driver, or the algorithm it uses, or even a stats file. Anyone able to point me in the right direction? Thanks.
Daveenna said:
It's work just fine for me, usually +/- 3% at most, works great on froyo.
Calibrate if it is way off
Sent from my HTC Magic using XDA App
Click to expand...
Click to collapse
How abouts do you calibrate the visual battery indicator at the top of the notification bar to be within 3%??
Are you talking about something else like the battery charge status reading?
I've experienced the same problem as the OP on all my Android phones as well. It is a problem when you think you have 75% charge and all the sudden you are getting low battery warnings.
same here. Notification Bar battery is hilariously off.
akapoor said:
I don't seem to have an issue with it.
When it reaches 75%, my bar is 3/4s. When it's 50, its half-way...etc...etc...
Click to expand...
Click to collapse
oh yea? mine goes to nine percent...and takes forever for it to shut down. only when i shut down the phone or reboot it, does it not come back on. lol

[Tutorial]Battery Recalibration

Though Most of you Might know this already But I'll post it for the new Users out there
So you have flashed your Rom Recently and are finding some trouble with your battery?
Does it dies too quickly? or you see those numbers going down very Soon?
There might be some Other Issues related to Battery drainage but most common problem the user might experience after flashing quite a few ROM's is Mis- callibration of the battery
To fix this install a market app known as battery callibration
https://market.android.com/details?id=com.nema.batterycalibration&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5uZW1hLmJhdHRlcnljYWxpYnJhdGlvbiJd
You need to have a ROOTED device for that
program does it by removing the batterystats.bin system file. The OS generates a new clean batterystats file soon, thus any fake information from the previous ROM is removed.
When you reboot the phone after calibration a new batterystats.bin is created
IMPORTANT after calibration let your phone discharge to 0% and then charge it to 100% without break
DO IT AT YOUR OWN RISK (although None is involved) I'm NOT RESPONSIBLE FOR
ANY SORT OF DAMAGE DONE.
Hope this helps you guys
This can also be done via CWM usinge the delete battery stats option.
Sent from Galaxy Fit. Running CM 7.1
panzerscope said:
This can also be done via CWM usinge the delete battery stats option.
Sent from Galaxy Fit. Running CM 7.1
Click to expand...
Click to collapse
Sure But as stated this is for new users Who are not well acquainted with recovery
Just following logic. If someone has started flashing Roms and rooting devices, I would be surprised if they had not discovered CWM
Sent from Galaxy Fit. Running CM 7.1
after doing research on all methods to recallibrate checking pros and cons finally i got the answer brothers...its very simple no need for cwm or drain full abttery kill your batery download recallibrate delete batterystat.bin....all fake bother....just do a simple step remove your battery for 2-5 minutes and than on it....you are recalibrated....simple
but what about batterystats.bin? Why is it there? ^^
And from which research resource you are talking?
galaxyfitankit said:
after doing research on all methods to recallibrate checking pros and cons finally i got the answer brothers...its very simple no need for cwm or drain full abttery kill your batery download recallibrate delete batterystat.bin....all fake bother....just do a simple step remove your battery for 2-5 minutes and than on it....you are recalibrated....simple
Click to expand...
Click to collapse
Hey..it works,thanks for your efort in researching this
I'm quite desperate coz ever since I'm installing creed 1.7 seems like my bettery drain very fast,too bad coz I like this ROM. Last night I charged it to 100%,then I go to sleep(so my HH is idle) but when I woke up 3 hours later,my battery stat already drop to 84%,strange. So I try plugged out my battery for 5 mins and voila..now it's written 53% but it's been like that for half hour so maybe it's quite stable now. Thanks again dude
since 13 months i m using fit bro and the most annoying thing of android was battery backup so researched almost all sites of android and lion baterry ....checked alll methods of battery boosting from apps and ram clearance,...the battery stats.bin bro yup that you dont have to take care its android system which adjust itself and recalibrate when you make your android without power means no battery for a while and when you insert it again the system itself recognizes....killing your battery specialy lion reduces its self life also its the number of cycles so whenever you charge charge your phone to fullest not like every 5 min you are charging your phone once a day to the fullest just check what i said bro its really works just believe and c
http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
colossus said:
http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
Click to expand...
Click to collapse
It's true it does not IMPROVE it but it helps show correct figures
sedhasukhdeep said:
It's true it does not IMPROVE it but it helps show correct figures
Click to expand...
Click to collapse
However, as she explains, that’s not the case. Because those battery stats, stored in the batterystats.bin file, are only used to maintain information about what is using the battery when not recharging. That is, it essentially holds the information displayed in the Settings > Battery screen. Nothing more, nothing less. Thus:
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Click to expand...
Click to collapse
I did battery re calibration once and it made no difference at all, having a google engineer dis-miss all the myths is good enough for me buddy.
colossus said:
I did battery re calibration once and it made no difference at all, having a google engineer dis-miss all the myths is good enough for me buddy.
Click to expand...
Click to collapse
Yeah I agree too..Not much difference
but still not that difficult too (Matter of seconds?)
I installed Battery Calibration 1.2. When open it writes the following:
1. Plug in your phone to the charger
2. Wait till it charges to 100%
3. Click 'Battery Calibration'
4. Unplug your phone
ZmisiS said:
I installed Battery Calibration 1.2. When open it writes the following:
1. Plug in your phone to the charger
2. Wait till it charges to 100%
3. Click 'Battery Calibration'
4. Unplug your phone
Click to expand...
Click to collapse
Everything is crap bro regarding battery calibration its just to sell there product
galaxyfitankit said:
Everything is crap bro regarding battery calibration its just to sell there product
Click to expand...
Click to collapse
I know. I've been to.
Thanks for this! I heard from some android users that Battery Calibration is a myth, but it appears to be really effective anyway.
sedhasukhdeep said:
Sure But as stated this is for new users Who are not well acquainted with recovery
Click to expand...
Click to collapse
dude does it really works. . ??
Instead of battery caliberation just swith off phone,remove battery,insert battery,turn on phone. It works.
Press Thanks if i helped you
avilove4u said:
dude does it really works. . ??
Click to expand...
Click to collapse
This work for me. Don't wipe battery. After install ROM, remove battery about 5 minutes and it is well.
ZmisiS said:
This work for me. Don't wipe battery. After install ROM, remove battery about 5 minutes and it is well.
Click to expand...
Click to collapse
Tell clearly bro .. After flashing rom i will use battery callibaration or nt ?
And by removing da battery and inserting after 5 mins da battery wl get long life ?? kidding ??
Sent From my lovely FIT..... !! lOvE u Fit

Android OS draining battery upto 72 %

Hi ,
yesterday night i dint plug my phone to charging because my battery was above 70 % so i thought its more than enough for next day but i woke up in noon and saw that my phone was on 11% so took a screenshot thought that posting it here might help me
thnx in advance
Try disabling Google now I heard that its a major battery drain to our crespo
Sent from my Crespo using xda premium
You need to describe your device configuration. Phonetype, Firmware, ....
Time for a clean install.
Sent from my Nexus S
nexususer said:
Hi ,
yesterday night i dint plug my phone to charging because my battery was above 70 % so i thought its more than enough for next day but i woke up in noon and saw that my phone was on 11% so took a screenshot thought that posting it here might help me
thnx in advance
Click to expand...
Click to collapse
Try Installing soju factory image from google. I did a clean install wiping dalvic chache as well and my battery is awsome since then and I never disable google now. See in the attached screenshot how flat battery consumption curve when I am not using it.
alien_x said:
Try Installing soju factory image from google. I did a clean install wiping dalvic chache as well and my battery is awsome since then and I never disable anything.
Click to expand...
Click to collapse
I did the samething after getting terrible battery life due to an AudioOut_2 wakelock that never let my phone idle, and the same thing still happens. I'm wondering if a hardware malfunction could cause screwy behavior like this.
Just do "proper clean install", it should help.
Agree with clean install. ROM and kernel choice have a lot to do with battery drain also.
Was this a one time thing or the norm for your phone? If a one time thing wouldn't worry too much but would still shop for ROMs and do a clean install.
I have started using Juice Defender and LUX and my battery life has increased exponentially its features should help any ROM kernel combo.
Sent from my Nexus S 4G
i had a problem with android os sucking the life out of my battery, all was ok for about a week after i installed jb but then my battery life sucked. rather than do a clean instal i turned off auto sync for a couple of days then switched it back on again, since then my battery life has been good and android os has hardly used up any battery. might be worth while trying this first
Yeah. Full wipe is a last resort. At least if you figure out what actually caused it, you can prevent it from happening. I remember my Nexus S had this weird bug where if I put the phone in air plan mode and didn't disable auto sync, the phone would never properly sleep. Never had that issue on any other phone.
Its sometimes ROM related....codename ROM I get high android is but not with androxide
Sent from my Nexus S using Tapatalk 2
alien_x said:
Try Installing soju factory image from google. I did a clean install wiping dalvic chache as well and my battery is awsome since then and I never disable google now. See in the attached screenshot how flat battery consumption curve when I am not using it.
Click to expand...
Click to collapse
You have network disabled... Off course it does not drain!
I cannot tell much about your device setup since not all the details were given, But even my Sprint Nexus S 4G had horrible battery issues. The stock gingerbread was a joke, then the stock ICS did improve to do a couple more hours. Now running an rooted JB and it seems to do 1day and 3 hours at this time.
alien_x said:
Try Installing soju factory image from google. I did a clean install wiping dalvic chache as well and my battery is awsome since then and I never disable google now. See in the attached screenshot how flat battery consumption curve when I am not using it.
Click to expand...
Click to collapse
i am using international nexus s superamoled version and my model number is i9010T so i cannot install soju i have to install sojua and i m on jelly bean right now
One Power Guard can help the system into a deep sleep,Reduce battery drain
downloaded from http://forum.xda-developers.com/showthread.php?t=1889740
One Power Guard, an AMAZING product, saves energy for your Android device under the all circumstances. It greatly enhances device performance, improves battery, and powers up standby time and battery life by optimizing system kernel and cpu, avoid phone overheating, shutting down useless programs, preventing from energy-consuming apps, initiating deep-sleep mode, adjusting Wifi parameters, optimizing charging parameters and pacing up setting change , etc.
Google Now
Turning off Google now is what fixed the battery drain for me. Tried other things but only this worked.

Misterious Battery Drain

Hello guys,
These days I've been noticing that something is draining my battery really fast. I checked and only half of the time my device is ON it is in deep sleep. The other half is on 400Mhz frequency. I check battery stats on Settings and OS is consuming it all. Yesterday I didn't use it and I got 1h of screen, and 25 minutes the day before. And again 50% of the time in sleep mode and 50% used (but I didn't use it)
Something is not letting my phone go into sleep mode. It's been happening for a week now.
Any clues on how to check deeper what's causing it?
i dont know whats causing it but i had it to in the night it lost 5/6 % of battery and i started to hate it but i installed greenify 3.0 build 5 and donate version so i added every single app and some system apps in it and it helped me allot only 1% lost in the night about 9 ours so its perfect for me now just try it i hope it helps
babanasor said:
i dont know whats causing it but i had it to in the night it lost 5/6 % of battery and i started to hate it but i installed greenify 3.0 build 5 and donate version so i added every single app and some system apps in it and it helped me allot only 1% lost in the night about 9 ours so its perfect for me now just try it i hope it helps
Click to expand...
Click to collapse
Loosing 6% in the night is not a problem. Actually, I turn on plane mode and I never loose any percentage in the night. My problem is that I loose all my battery percentage
felystar said:
Loosing 6% in the night is not a problem. Actually, I turn on plane mode and I never loose any percentage in the night. My problem is that I loose all my battery percentage
Click to expand...
Click to collapse
did you try soft reset sometimes it helps calibrate battery?
hold volume down and power button wait tiill it reboots
and maybe its a app that you installed as last is waking up your device ?
and have tried a factory reset and what rom are you using ?
babanasor said:
did you try soft reset sometimes it helps calibrate battery?
hold volume down and power button wait tiill it reboots
and maybe its a app that you installed as last is waking up your device ?
Click to expand...
Click to collapse
I have just tried what you said. I'll be testing it today.
However I calibrated my battery when this starting to make sure it was well calibrated.
And I thought I could be an app but it would be under Battery Settings and show us very consuming, wouldn't it?
felystar said:
I have just tried what you said. I'll be testing it today.
However I calibrated my battery when this starting to make sure it was well calibrated.
And I thought I could be an app but it would be under Battery Settings and show us very consuming, wouldn't it?
Click to expand...
Click to collapse
yes that true it would show you but if i were you i did a factory reset fullwipe and use a good rom like alexis rom the latest one and install greenify aswell but first test what you are doing right now if its not good than you have no choice just full wipe clean install a good rom
First try this you can check it with this app also wakelock detector
https://play.google.com/store/apps/details?id=com.uzumapps.wakelockdetector&hl=nl
ALEXISROM
https://forum.xda-developers.com/galaxy-s6/development/alexis-rom-1-0-feel-game-sound-01-04-t3349944
Dont forget to make a backup!!

Calibrating Pixel Battery

Recently, my Pixel has started dying when the battery level still shows 15-20%. It doesn't even enter battery saver mode anymore (triggered at 15%). What is the best method to get the system to recalibrate the battery on a Pixel? I've read about clearing the cache partition on other devices, but the Pixel doesn't have one, and I don't see anything battery-related in /data/cache. I'm pretty sure deleting batterystats.bin has been entirely debunked. I've run through several complete charge-recharge cycles to try to reset it without success. Any other ideas?
hackel said:
Recently, my Pixel has started dying when the battery level still shows 15-20%. It doesn't even enter battery saver mode anymore (triggered at 15%). What is the best method to get the system to recalibrate the battery on a Pixel? I've read about clearing the cache partition on other devices, but the Pixel doesn't have one, and I don't see anything battery-related in /data/cache. I'm pretty sure deleting batterystats.bin has been entirely debunked. I've run through several complete charge-recharge cycles to try to reset it without success. Any other ideas?
Click to expand...
Click to collapse
I use the reset battery statistics feature in HEBF Optimizer app and I've made a habit out of just doing this after every flashing of a new rom once I hit 100% battery
KittyRgnarok said:
I use the reset battery statistics feature in HEBF Optimizer app and I've made a habit out of just doing this after every flashing of a new rom once I hit 100% battery
Click to expand...
Click to collapse
I assume this just erases the batterystats.bin file, which only stores which apps are responsible for power usage. Unfortunately that's not going to help me.
hackel said:
I assume this just erases the batterystats.bin file, which only stores which apps are responsible for power usage. Unfortunately that's not going to help me.
Click to expand...
Click to collapse
Fair assumption, but I would try it regardless. And even if the feature in particular doesn't help the app overall is one I highly recommend and would almost categorize as a root essentials app
hackel said:
I assume this just erases the batterystats.bin file, which only stores which apps are responsible for power usage. Unfortunately that's not going to help me.
Click to expand...
Click to collapse
Did you ever find a solution? I am starting to see the same problem on my Pixel.
I'd love to hear if a solution was found.
Ran into this issue today.
---------- Post added at 11:18 AM ---------- Previous post was at 11:18 AM ----------
I'd love to hear if a solution was found.
Ran into this issue today.
joemanbui said:
Did you ever find a solution? I am starting to see the same problem on my Pixel.
Click to expand...
Click to collapse
No, unfortunately it just got worse and worse, with it shutting off typically between 50-60% charge (but sometimes as high as 85%!), and overheating like crazy. I finally contacted Google about it and they issued me a refurbished phone as a replacement. Just wish I would have contacted them sooner!

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