[Q] Nexus 4 phone gets switched off when battery reaches 30% - Nexus 4 Q&A, Help & Troubleshooting

HI All,
My Nexus 4 just gets powered off when battery is around 30% and now its starting get worse, it gets switched off when its around 40%.I haven't rooted my phone. It is weird first the network goes off and then when i lock my phone and unlock it just doesn't come up and when I put it for charge it shows as it is charging from 0%. This is being happening since 2 weeks. Anybody has faced the same problem?
voltage :-4.3V
avg voltage :- 4.0V
temp :- 34.7 C
avg temp:- 33.1 C
Anyone has a solution pelase

praveenpk said:
HI All,
My Nexus 4 just gets powered off when battery is around 30% and now its starting get worse, it gets switched off when its around 40%.I haven't rooted my phone. It is weird first the network goes off and then when i lock my phone and unlock it just doesn't come up and when I put it for charge it shows as it is charging from 0%. This is being happening since 2 weeks. Anybody has faced the same problem?
voltage :-4.3V
avg voltage :- 4.0V
temp :- 34.7 C
avg temp:- 33.1 C
Anyone has a solution pelase
Click to expand...
Click to collapse
I'm having similar problems, please check my thread too!

praveenpk said:
HI All,
My Nexus 4 just gets powered off when battery is around 30% and now its starting get worse, it gets switched off when its around 40%.I haven't rooted my phone. It is weird first the network goes off and then when i lock my phone and unlock it just doesn't come up and when I put it for charge it shows as it is charging from 0%. This is being happening since 2 weeks. Anybody has faced the same problem?
voltage :-4.3V
avg voltage :- 4.0V
temp :- 34.7 C
avg temp:- 33.1 C
Anyone has a solution pelase
Click to expand...
Click to collapse
japmeet said:
I'm having similar problems, please check my thread too!
Click to expand...
Click to collapse
Hi guys! You have two answers:
- It is not a real problem but a bad representation of your battery level. Batterystats.bin is a file under /data/system. In this file the phone saves information about your battery level and capacity. Using the saved values, system can create the battery icon, making a level or another. This file is auto-generated, so if u delete it, you are cleaning the battery information in your device. If the saved information isn't real maybe you seem to have 30% battery but the real battery charge is 1%, so my suggestion is:
1. Download an explorer (I would recommend Root Explorer)
3. Charge the phone until the top, let it discharge until the phone cannot reboot
4. Charge it till 100%, unplug it from charger
5. Reboot and connect it back to the charger till 100% again. Unplug it
6. Go to /data/system and delete batterystats.bin
7. Use the phone normally​
If the problem isn't solved in 1-2 days then...
- It is a real problem, may be caused for who main reasons:
The kernel isn't making a good management of the energy. Flash another kernel and set up proper CPU Values to get a good battery life . Configure the cpu frecuencies using an app for so, like trickster mod, cpu master, franco kernel updater, you have a lot... Also undervolt your phone if u think it is necessary too.
Your hardware is broken somewhere, maybe a bad battery, or something overcharged or wrong there. Contact Google SAT and praise for it to be a factory bug lol
I am sorry for this big bible, but hope it is useful for you and the community

luiseteyo said:
Hi guys! You have two answers:
- It is not a real problem but a bad representation of your battery level. Batterystats.bin is a file under /data/system. In this file the phone saves information about your battery level and capacity. Using the saved values, system can create the battery icon, making a level or another. This file is auto-generated, so if u delete it, you are cleaning the battery information in your device. If the saved information isn't real maybe you seem to have 30% battery but the real battery charge is 1%, so my suggestion is:
1. Download an explorer (I would recommend Root Explorer)
3. Charge the phone until the top, let it discharge until the phone cannot reboot
4. Charge it till 100%, unplug it from charger
5. Reboot and connect it back to the charger till 100% again. Unplug it
6. Go to /data/system and delete batterystats.bin
7. Use the phone normally​
If the problem isn't solved in 1-2 days then...
- It is a real problem, may be caused for who main reasons:
The kernel isn't making a good management of the energy. Flash another kernel and set up proper CPU Values to get a good battery life . Configure the cpu frecuencies using an app for so, like trickster mod, cpu master, franco kernel updater, you have a lot... Also undervolt your phone if u think it is necessary too.
Your hardware is broken somewhere, maybe a bad battery, or something overcharged or wrong there. Contact Google SAT and praise for it to be a factory bug lol
I am sorry for this big bible, but hope it is useful for you and the community
Click to expand...
Click to collapse
Thanks, I'll try it out
Edit: I'm using franco r191, Cpu max at 1Ghz, -150mV undervolt. I just had a question. Don't the battery calibration apps like BatteryCalibration do the same thing?

japmeet said:
Thanks, I'll try it out
Edit: I'm using franco r191, Cpu max at 1Ghz, -150mV undervolt. I just had a question. Don't the battery calibration apps like BatteryCalibration do the same thing?
Click to expand...
Click to collapse
Yes, they do, but since everyone has a downloaded root explorer I think is easier this way. You don't have to download any app

luiseteyo said:
Yes, they do, but since everyone has a downloaded root explorer I think is easier this way. You don't have to download any app
Click to expand...
Click to collapse
That app didn't do anything, however I'll try it your way too, and update

japmeet said:
That app didn't do anything, however I'll try it your way too, and update
Click to expand...
Click to collapse
How do u know it didn't do anything?

luiseteyo said:
How do u know it didn't do anything?
Click to expand...
Click to collapse
battery stats didn't reset, plus phone still died at 34%.
I'm charging my phone right now and it goes from 34% to 100% in a few minutes but when I reboot it , the battery %age comes back to 34-35%, what should I do in this case?
Edit: the voltage its showing right now is around 4.3V, so is the 100% correct?

japmeet said:
battery stats didn't reset, plus phone still died at 34%.
I'm charging my phone right now and it goes from 34% to 100% in a few minutes but when I reboot it , the battery %age comes back to 34-35%, what should I do in this case?
Edit: the voltage its showing right now is around 4.3V, so is the 100% correct?
Click to expand...
Click to collapse
Yes, it is correct. If you are rooted you shouldn't have any problem deleting it. Cannot reset, because don't exist. Charge the phone for 8h tonight. When you get up delete it and report.
I won't be very dissapointed if you thank ANY of my answers lol!!

luiseteyo said:
Yes, it is correct. If you are rooted you shouldn't have any problem deleting it. Cannot reset, because don't exist. Charge the phone for 8h tonight. When you get up delete it and report.
I won't be very dissapointed if you thank ANY of my answers lol!!
Click to expand...
Click to collapse
lol, don't worry, trust me I am very thankful for your help, I'm clicking on those little thumbs up now
---------- Post added at 03:36 PM ---------- Previous post was at 03:20 PM ----------
luiseteyo said:
Yes, it is correct. If you are rooted you shouldn't have any problem deleting it. Cannot reset, because don't exist. Charge the phone for 8h tonight. When you get up delete it and report.
I won't be very dissapointed if you thank ANY of my answers lol!!
Click to expand...
Click to collapse
Question, restart after deleting batterystats.bin file?

japmeet said:
lol, don't worry, trust me I am very thankful for your help, I'm clicking on those little thumbs up now
---------- Post added at 03:36 PM ---------- Previous post was at 03:20 PM ----------
Question, restart after deleting batterystats.bin file?
Click to expand...
Click to collapse
It isn't necessary

luiseteyo said:
It isn't necessary
Click to expand...
Click to collapse
Alright, thanks, this time when it hit a 100% I restarted it and it stayed at around 97-98%, let it charge all the way up to 100% and deleted the batterystats file, lets see if this fixes my problem!
Thanks for your support

japmeet said:
Alright, thanks, this time when it hit a 100% I restarted it and it stayed at around 97-98%, let it charge all the way up to 100% and deleted the batterystats file, lets see if this fixes my problem!
Thanks for your support
Click to expand...
Click to collapse
It's ok!
Don't charge it till 100%, because if the file is corrupted it isn't a real 100%, do you understand? Let it charge some hours to grant it is fully charged!
Bye and good luck!
If you have any question more, just quote my post

Related

[GUIDE] [FINALLY FINISHED] Calibrate and Maximize Your Battery

Ok people, you asked for it. I hope this helps!
Maximizing your Battery on your Android Device [and/or HD2]via Calibration and a little bit of common SENSE.
WARNING: DO NOT FLAME, CRITICIZE OR MAKE FUN OF SOMEONE WHO NEEDS HELP. IF ANY OF THIS GOES ON IN THIS THREAD, YOU AND YOUR POST WILL BE REPORTED. I'M SICK AND TIRED OF NERDS HAVING HISSY FITS LIKE RUDE CHILDREN. LEAVE YOUR PROBLEMS OUT OF THIS THREAD. Thanks <3
..::I AM NO WAY RESPONSIBLE FOR YOU SCREWING UP YOUR PHONE, BATTERY, OR LIFE. READ THIS CAREFULLY. FOLLOW DIRECTIONS. USE YOUR BRAIN, PEOPLE!!!::..
Intro: So, as we all know, the HD2 running NAND [and apparently, WinMo6.5] has troubles reporting REAL battery life and battery drain. This guide is for those of you who want the most out of your battery--stock or extended--doesn't matter. This applies to all other phones running Android as well, as the steps I am giving and explaining below can be executed using Terminal Emulator.
When Should You Do This Process:
1.) Getting a New Battery [doesn't matter if it's the same voltage or not, if you put a new battery in your device, FOLLOW THIS GUIDE!!]
Why: The .bin file stored in your phone's system displays battery for one battery. Thus, if you ever change batteries, you NEED to update the .bin file, or else your phone will not display the correct battery readings--prematurely shutting off your device and/or draining battery when the phone says that you are at 50%.
2.) Switching Roms
Why: Every time you wipe your phone's system data, the .bin file gets replaced with a GENERIC file that could or could not apply to your battery. You want the .bin file to be up to date.
3.) Once a Month
Why: This should be part of a monthly routine, to get the most out of your battery. If you flash more than one rom a month, this does not apply to you, as you should be recalibrating your battery whenever you flash a new rom for accurate battery readings [and a potential increase in your phone's daily battery life].
What You Need:
-a rooted phone
-superuser
-busybox
-Terminal Emulator [which can be downloaded from the market]
-Set CPU [which is available to XDA members for free, can be purchased from the market as well]
-Spare Parts
-any sort of automatic task killer
-phone charger
**The method I am using involves using Terminal Emulator installed on your Android device. You can also execute this using adb commands on your computer, assuming that you know how to do it. For those of you that are inexperienced and/or want to save time, read on...
Walkthrough:
..::I AM NO WAY RESPONSIBLE FOR YOU SCREWING UP YOUR PHONE, BATTERY, OR LIFE. READ THIS CAREFULLY. FOLLOW DIRECTIONS. USE YOUR BRAIN, PEOPLE!!!::..
1.) Plug in your device in overnight. Your phone needs to be ON and fully functional [this especially applies to HD2 users, as MAGDLR will not reboot if phone is plugged in--it's a weird glitch]. Turn on Airplane mode if you must. [Keep it plugged in between 8 and 10 hours.]
2.) Turn off your phone.
3.) Just in case, plug in your phone for 10 more minutes [just to make sure it's completely charged @ 100%.
4.) Unplug your phone. Immediately pull out the battery, then put it back in. Press the power button. Plug your phone back in.
5.) Open Terminal Emulator. Type in the code below.
su
[press enter]
rm data/system/batterystats.bin
[press enter again]
Click to expand...
Click to collapse
6.) Deplete your phone as necessary. Once your phone automatically shuts off, turn your phone on again. Hopefully, your phone automatically shuts off as it's booting back up, or it shuts off once it brings you to your lockscreen. Repeat 2 or 3 more times.
You have now recalibrated your battery!
My Notes:
I bought a 2400mAh extended battery for my HD2, which is roughly TWICE the size of a normal HD2 battery. Yes, it is to be expected that my phone should NATURALLY last longer than stock, but read on to see the effects of recalibrating the battery.
Also, I have SET Cpu located on my SD card somewhere [I should really look for it and install it], and I am absolutely positive that if I had it installed, set with an interactive governor, the data below should be a LOT different.
Memory intensive applications:
-Zenonia 2
-Stumbleupon
-MIUI Music
-Swiftkey Beta [along with the other modules and crap I had to download]
-Miren Browser
-Tweetdeck [2 columns set up at 15 min intervals, one at 30 mins]
-Current Widget
-XDA app [obviously XD]
Power-saving settings:
Wifi--On [from 8am-11am]
GPS--Off
Bluetooth--Off
Normal Static Wallpaper [as in a picture, not a live wallpaper]
Brightness--0% [which is STILL too bright, but whatever]
3G--when available, I had Edge from 2:30-8:30 [which inevitably drains my battery more than 3G for some weird reason]
Auto-Task Killer
My Data:
Tested using "memory intensive applications" [see above for full list] and power-saving settings ["again, see above"]. I am running FutureShock's MIUI 2.2.1. Your results WILL vary from mine, based on what rom you are running, your phone, your battery, your running apps, etc etc etc. I am also NOT running Set CPU. I will be conducting another test soon using Set CPU, just to see what results I get. I suggest you run Set CPU, you could potentially double the uptime of your phone.
Time------Percent of Battery [See notes at bottom of this chart, since a few of the percents have been changed to THIS COLOR with two ** after them]
8:00 am ----- 100%
8:30 am ----- 80%
9:00 am ----- 98%**
9:24 am ----- 93%
10:36 am ----- 81%
10:37 am ----- 91%**
11:05 am ----- 85%
11:30 am ----- 81%
12pm [noon] ----- 81%
1:03 pm ----- 77%
2:07 pm ----- 67%
2:10 pm ----- 77%**
2:34 pm ----- 73%
3:00 pm ----- 72%
3:35 pm ----- 68%
4:01 pm ----- 64%
4:31 pm ----- 59%
5:13 pm ----- 55%
5:16 pm ----- 63%**
6:00 pm ----- 57%
6:53 pm ----- 48%
6:57 pm ----- 56%**
7:30 pm ----- 50%
8:00 pm ----- 51% ?!?!?!?!
9:45 pm ----- 38%
10:22 pm ---- 37%
Notes
Random Percent%**
This means that I removed the battery [battery pull], then rebooted the phone. Apparently, the battery readings are VERY inaccurate, being off by as much as 18%.
I have no idea why my battery went up 1% between 7:30 and 8:00. So please don't ask.
Conclusions:
Due to the fact that [apparently] my battery was being inaccurately read, random battery pulls were required to get up-to-date battery readings. I am not sure if this is an HD2 issue, or an overall Android issue when recalibrating your battery after removing the previous .bin file. IF YOU WOULD LIKE TO FURTHER THIS DISCUSSION, I WOULD LOVE MORE DATA FROM OTHER PHONES--HD2 OR NOT.
My battery is STILL running strong. Nothing incredibly drastic at all. I'm surprised that the data turned out like this.
Quick Tips:
1.) If your battery seems to be running low after clearing the stats. Check your battery's actual percent USING SPARE PARTS, then do a battery pull. See what your battery displays when you reboot.
2.) Check Spare Parts to see if your battery is being calibrated. If your battery is 3.7V, and Spare Parts says that your battery's voltage is 2.0V, then delete your battery stats again. Anything above or below .5V from your actual battery's voltage is normal error.
Q & A:
Q: I have a [insert Android phone here] running [insert ROM here]. Does this guide/walkthrough work for me?
A: YES! Go ahead!
Q: I typed in the code you said, and it said "Read/Write Permissions Denied". What's wrong?
A: Your phone is not rooted OR you don't have Superuser installed OR you don't have Busybox enabled.
Q: I have a question, but it's not on here!
A: Send me a PM with your question, and post it in this thread.
Q: I have data from testing this method with my phone running [insert rom here]. Can I send you the data via PM and/or post it in this thread?
A: PLEASE. The more data I receive from other users trying this out, the more accurate I can make this guide. Send me everything!
Q: Can I follow you on Twitter?
A: Sure. Why not. @GoCkillaz
data/system/batterystats.bin
GoCkillaz said:
Hey, I bought an extended battery for my HD2, and I want to wipe the battery stats so my phone reports accurate battery usage.
Where is the .bin file located?
Sent from my phone-containing Chinese software that puts us Americans to shame.
Click to expand...
Click to collapse
Tell us if it works when done.
lms1407 said:
Tell us if it works when done.
Click to expand...
Click to collapse
I found an alternate method. Battery calibration.
1.) Completely drain battery, so the phone shuts off automatically.
2.) Turn on phone again, which should automatically shut off after first boot screen.
3.) Plug in to charger for 8+ hours. Plugging it in overnight will work as well.
Sent from my phone-containing Chinese software that puts us Americans to shame.
GoCkillaz said:
I found an alternate method. Battery calibration.
1.) Completely drain battery, so the phone shuts off automatically.
2.) Turn on phone again, which should automatically shut off after first boot screen.
3.) Plug in to charger for 8+ hours. Plugging it in overnight will work as well.
Sent from my phone-containing Chinese software that puts us Americans to shame.
Click to expand...
Click to collapse
OK, the only problem is that after Magldr no one is able to get accurate charging with phone off.
It charges up to 98 - 99% but never 100%, so this method is not realy working.
This i was doing since the early days of winmo phones, now it's Nandroid with its problems...
lms1407 said:
OK, the only problem is that after Magldr no one is able to get accurate charging with phone off.
It charges up to 98 - 99% but never 100%, so this method is not realy working.
This i was doing since the early days of winmo phones, now it's Nandroid with its problems...
Click to expand...
Click to collapse
I'm recalibrating my phone tonight. I'm running every single battery wasting process I can.
Waiting for your update, dude!
Update #1
I will have update by tomorrow night. My extended battery kept my phone at 1% for close to 90 mins until I gave up and did some more research. Sorry for keeping you all waiting.
I will be using this method below. If it works significantly, I will edit the first post. Ok?
For future reference:
1. Charge to 100 % with phone turned ON.
2. Shut down the phone.
3. Charge for 10 more minutes.
4. Unplug.
5. Remove then reinsert battery.
6. Turn on phone.
7. Plug phone in.
8. Delete data/system/batterystats.bin
THE CODE IS:
su
[press enter]
rm data/system/batterystats.bin
[press enter again]
9. Deplete the battery with movies, wifi, bluetooth, auto synch, max brightness, GPS, and random programs.
10. Let phone die. Turn on again, wait til phone dies on it's own. Repeat 2x.
11. Plug in, charge to 100%.
See you all tomorrow at around this time.
For those of you wondering, the method I tried works. I suggest you subscribe to this thread so you all know when I update this. I'm currently recording all my notes. First post will be revamped tonight with an informative guide and my data. Let me know if you guys want anything specific in the first post.
Sent from my phone-containing Chinese software that puts us Americans to shame.
Attention people. I posted the guide in the first post. Please let me know how this works for you!!! :d
coolfire said:
Waiting for your update, dude!
Click to expand...
Click to collapse
Check first post. That's my update.
Personally I don't think this is relavent at all. My phone charges normally and uses normal battery. I get almost two full days on a battery with a NAND build. I calibrate by charging to 100% turn phone off turn back on charge to 100% turn off and back on this works fine for me...
akapaul26 said:
Personally I don't think this is relavent at all. My phone charges normally and uses normal battery. I get almost two full days on a battery with a NAND build. I calibrate by charging to 100% turn phone off turn back on charge to 100% turn off and back on this works fine for me...
Click to expand...
Click to collapse
That works too, lol.
can NAND charge a battery when it's dead? I heard some problem with charging in NAND/MAGLDR
Have anyone solved battery charge problem in all android nand version for HD2? My HD2 doesn't start when i charge battery in off mode. Orange led do not turn green and phone doesn't start. Only way is soft reset with internal red button. I can charge it in standby mode. Then, led charge becomes green.
How you doing?
Thanks
What build are you using to get 2 days of battery life? On NAND, all i have tried so far was the stock Dec 30th DFT Desire rom. But battery life, even when calibrating, was not very good. With moderate use it would deplete within 24hrs. Now with WP7 my battery does last 2 days, same usage patterns. Did more recent roms fix things? I am well aware of SetCPU, interactive and smartass governors and so on, neither really gave me satisfactory battery life .
dan138zig said:
can NAND charge a battery when it's dead? I heard some problem with charging in NAND/MAGLDR
Click to expand...
Click to collapse
Im wondering the same as i remember reading it somewhere (cant charge the phone with MAGLDR if the phone is not turned on). If batt is depleted and i cant power on the phone - its a disaster right? I dont have a spare batt or external batt charger.
Anyone, please shed some light on this. Thanks!
I was thinking about buying an extended version but if I look at your uptime :O :O
My phone lasts for 51 - 54 hrs. damn, and I actually use it
I tought an extended batt would extend time but it seems the other way around
tidus18 said:
Im wondering the same as i remember reading it somewhere (cant charge the phone with MAGLDR if the phone is not turned on). If batt is depleted and i cant power on the phone - its a disaster right? I dont have a spare batt or external batt charger.
Anyone, please shed some light on this. Thanks!
Click to expand...
Click to collapse
hmmzz, I wouldn't try it but I get this strange feeling that something goes wrong when the phone is shut down. because when I pull the plug, my orange led STAYS awake my phone is so happy it's charged on air, maybe my phone is high or something but if that's not the case it's clear that some errors are to be solved.
to be clear: when u want to test it shut down your phone when you got 80% or so, put it 10 minutes at the charger, boot and see for yourself!
HectiQ said:
I was thinking about buying an extended version but if I look at your uptime :O :O
My phone lasts for 51 - 54 hrs. damn, and I actually use it
I tought an extended batt would extend time but it seems the other way around
Click to expand...
Click to collapse
What are you doing to get your battery to last that long? If thats stock, then im obviously doing something wrong.
Sent from my phone-containing Chinese software that puts us Americans to shame.

Incorrect reading for battery after updated to 4.2.2

Hi, today I went to office, I can see the battery reading is 84% after one hour of use in the transportation. When I plug the phone to the charger it shows 100% immediately (Charge so quickly isn't it ? :laugh. It remains 100% even I reboot the phone. Did anyone meet this bug?
Have never encounterd such a thing. Are you rooted?
Sv: Incorrect reading for battery after updated to 4.2.2
Never seem it but try a factory reset. I always do one after a system update.
Skickat från min Nexus 4
It's likely nothing is wrong. After every ROM flash, the battery calibration always messes up a bit. Just use the phone normally and the calibration will fix itself after a couple charge cycles. If you want to fix it sooner, run the battery down and charge it again.
Hi, today I went to office, I can see the battery reading is 84% after one hour of use in the transportation. When I plug the phone to the charger it shows 100% immediately (Charge so quickly isn't it ? ). It remains 100% even I reboot the phone. Did anyone meet this bug?
Click to expand...
Click to collapse
That will happen with any/all N4's at some point. More commonly the battery will lie to you, forget to update battery level during deep sleep, etc... Your phone isn't "broken".
Mines just did that today.. Was at around 38, plugged it to the laptop to transfer stuff, took it off showed 100.. reboot fixed it but now I have to recalibrate
Sent from my Nexus 4
noodles2224 said:
Mines just did that today.. Was at around 38, plugged it to the laptop to transfer stuff, took it off showed 100.. reboot fixed it but now I have to recalibrate
Sent from my Nexus 4
Click to expand...
Click to collapse
how do you recalibrate exactly?
xiFIL said:
how do you recalibrate exactly?
Click to expand...
Click to collapse
i would like to know this too.
i had the same problem with you guys..because of the TWRP... my phone charged 100%, rebooted in recovery and then i saw only 92%.. i change twrp with cmw,and everything is cool now...but i see my battery to do the following :82,80,73,74 etc...wihout heavy use.. is our battery a little wonky or i just my idea..?
you can calibrate your battery with the following app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=el
not 100% sure if it really works,but you can have a try "gonna need to be rooted'
Thx Bros! Let me try it. :good:
Mr_Comple said:
i had the same problem with you guys..because of the TWRP... my phone charged 100%, rebooted in recovery and then i saw only 92%.. i change twrp with cmw,and everything is cool now...but i see my battery to do the following :82,80,73,74 etc...wihout heavy use.. is our battery a little wonky or i just my idea..?
you can calibrate your battery with the following app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=el
not 100% sure if it really works,but you can have a try "gonna need to be rooted'
Click to expand...
Click to collapse
i tried it on my old phone and it worked. So far my N4 is still fairly calibrated.
batterystats.bin has absolutely nothing to do with the battery level your phone is showing you. Its a per charge battery history file, i.e. what you see if you go to Settings>Battery.
Sent from my Nexus 4 using Tapatalk 2
Mr_Comple said:
i had the same problem with you guys..because of the TWRP... my phone charged 100%, rebooted in recovery and then i saw only 92%.. i change twrp with cmw,and everything is cool now...but i see my battery to do the following :82,80,73,74 etc...wihout heavy use.. is our battery a little wonky or i just my idea..?
you can calibrate your battery with the following app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=el
not 100% sure if it really works,but you can have a try "gonna need to be rooted'
Click to expand...
Click to collapse
As far as am aware it doesn't really work? So your saying changing recovery for you helped with your battery, coz like i take it off charge and its 100% then it jumps down to 97% after a few minutes and am not even doing anything.. and i just got this phone this week. Am tempted to send it back, i don't know what to do?
xiFIL said:
As far as am aware it doesn't really work? So your saying changing recovery for you helped with your battery, coz like i take it off charge and its 100% then it jumps down to 97% after a few minutes and am not even doing anything.. and i just got this phone this week. Am tempted to send it back, i don't know what to do?
Click to expand...
Click to collapse
That is because you left the phone plugged in for so long that it hits 100%, then it starts discharging to prevent overcharge.. so it drops to 95%, then charges again. You took it off at 97% (yes, it might still have shown 100% for a little while so you don't go and plug it in again).
Sfkn2 said:
That is because you left the phone plugged in for so long that it hits 100%, then it starts discharging to prevent overcharge.. so it drops to 95%, then charges again. You took it off at 97% (yes, it might still have shown 100% for a little while so you don't go and plug it in again).
Click to expand...
Click to collapse
So how do i charge it so it doesn't drop, i am getting severe battery drain, i take it off at 100% after checking instagram, twitter and chrome for 10 mins its dropped to 70%.. matr1x kernel with CM10.1..? thanks!

[Q] Battery charging only up to 85%

Hi,
I've recently replaced my battery and now it is not charging fully to 100% but only to 85%. Sometimes it displays it is fully charged but after a minute the percentage dropped to 85%. I've already tried multiple chargers with no result. The only thing that works is bump charging. It looks like the battery is just working fine but the displayed percentage is not right. Is there a way to 'reset' this statistic? Removing the battery.bin didn't do anything for me.
Is there a way to check if the battery is really fully charged despite the wrong displayed percentage?
Faeshaas said:
Hi,
I've recently replaced my battery and now it is not charging fully to 100% but only to 85%. Sometimes it displays it is fully charged but after a minute the percentage dropped to 85%. I've already tried multiple chargers with no result. The only thing that works is bump charging. It looks like the battery is just working fine but the displayed percentage is not right. Is there a way to 'reset' this statistic? Removing the battery.bin didn't do anything for me.
Is there a way to check if the battery is really fully charged despite the wrong displayed percentage?
Click to expand...
Click to collapse
To fix what you are doing you have to be rooted.
1. Root your n4
2. Download root browser from playstore
3. Go to data/system directory and delete batterystats.bin
4. Accept superuser access
5. Reboot and let the battery drain till 0%
Anyway, I don't know if it will be a battery calibration issue, because if u had to replace your previous battery maybe your phone doesn't manage battery well and destroy them... Try, report, and we will make conclusions
luiseteyo said:
To fix what you are doing you have to be rooted.
1. Root your n4
2. Download root browser from playstore
3. Go to data/system directory and delete batterystats.bin
4. Accept superuser access
5. Reboot and let the battery drain till 0%
Anyway, I don't know if it will be a battery calibration issue, because if u had to replace your previous battery maybe your phone doesn't manage battery well and destroy them... Try, report, and we will make conclusions
Click to expand...
Click to collapse
I just deleted it, it's worth a try!
The weird thing is bump charging will result in a 100% charge and the battery seems to work normally (20hours of battery time with normal use).
luiseteyo said:
To fix what you are doing you have to be rooted.
1. Root your n4
2. Download root browser from playstore
3. Go to data/system directory and delete batterystats.bin
4. Accept superuser access
5. Reboot and let the battery drain till 0%
Anyway, I don't know if it will be a battery calibration issue, because if u had to replace your previous battery maybe your phone doesn't manage battery well and destroy them... Try, report, and we will make conclusions
Click to expand...
Click to collapse
It will be a battery calibration issue since that file only stores the statistics of apps. It gets deleted upon reboot. So this won't affect the measurements in any way.
Sent from my Nexus 4 using Tapatalk
Faeshaas said:
Hi,
I've recently replaced my battery and now it is not charging fully to 100% but only to 85%. Sometimes it displays it is fully charged but after a minute the percentage dropped to 85%. I've already tried multiple chargers with no result. The only thing that works is bump charging. It looks like the battery is just working fine but the displayed percentage is not right. Is there a way to 'reset' this statistic? Removing the battery.bin didn't do anything for me.
Is there a way to check if the battery is really fully charged despite the wrong displayed percentage?
Click to expand...
Click to collapse
Connect the charger to the Nexus 4, then insert the plug.
Press the power button and hold it until the device turns on. Immediately after this, press and hold the Volume Down key, not releasing the power button. Appears on the screen Start, circled arrow.
Pressing the Volume Down key, select Power off and activate it by pressing the power button.
When the phone is turned off, unplug the charger and plug it in again. then turn on the phone.
Both solutions didn't work for me. Is there a way to confirm that even if Android displays a value of 85% the battery is fully charged? Because I don't care that much wrong percentage is displayed, I just wanna know for sure the battery is ok.
Faeshaas said:
Both solutions didn't work for me. Is there a way to confirm that even if Android displays a value of 85% the battery is fully charged? Because I don't care that much wrong percentage is displayed, I just wanna know for sure the battery is ok.
Click to expand...
Click to collapse
you should try reflashing your rom
Wipe cache, dalvik cache and battery stats in recovery then fix permissions and reboot.
Puneet Singh Chauhan said:
Wipe cache, dalvik cache and battery stats in recovery then fix permissions and reboot.
Click to expand...
Click to collapse
As I already said in the 3rd post here. That is absolutely useless.
Sent from my Nexus 4 using Tapatalk
luiseteyo said:
To fix what you are doing you have to be rooted.
1. Root your n4
2. Download root browser from playstore
3. Go to data/system directory and delete batterystats.bin
4. Accept superuser access
5. Reboot and let the battery drain till 0%
Anyway, I don't know if it will be a battery calibration issue, because if u had to replace your previous battery maybe your phone doesn't manage battery well and destroy them... Try, report, and we will make conclusions
Click to expand...
Click to collapse
Or restart your phone and battery stats will reset.

[Q] LG G2 D802 battery problem after getting overheated

Hi all,
I would like to ask you(with better skills than me) something about my LG device. Once I got up after listening to music my device was approximately 42celsius degrees and i had to turn it off for 30 mins to get it on a normal temperature. After that I realized my device battery is draining so fast. I don't know why....my idea is that: because of the high temperature or it's a software bug. I plug my phone off at 6:30am and after using it a little I only have maximum 20% at 4:00pm. I'm using Alegen's 5.0.1 rom and all the people who use it said they haven't got a problem like me. I downloaded CPUz and it says my battery life is good. So please help me because I don't know what to do.
Sorry about my English.
42 is a verry low temp. My G2 have 45 in idle, doing nothing. Dont worry, there is no pb with battery
x3m.zone said:
42 is a verry low temp. My G2 have 45 in idle, doing nothing. Dont worry, there is no pb with battery
Click to expand...
Click to collapse
Thanks for your answer but what should I do with my battery draining? I'm using it on a very low brightness and wifi is turned off,etc...
Make a nandroid backup and then try reflashing to stock after a full battery charge. Use the phone until 5-2% and then fully charge it. Then use as normal and see if it helps. If that hasnt helped it could be battery issues.
Also when the phone heats up is it near the top beside the camera?
Sent from my LG-D802 using Tapatalk
heavy_metal_man said:
Make a nandroid backup and then try reflashing to stock after a full battery charge. Use the phone until 5-2% and then fully charge it. Then use as normal and see if it helps. If that hasnt helped it could be battery issues.
Also when the phone heats up is it near the top beside the camera?
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
Yes I would say but I don't know for sure
magonydavid said:
Yes I would say but I don't know for sure
Click to expand...
Click to collapse
Mine heats on same place, so i think its CPU/GPU there, as battery is lower than that, so its normal
nikola016 said:
Mine heats on same place, so i think its CPU/GPU there, as battery is lower than that, so its normal
Click to expand...
Click to collapse
Ohh but I don't know why my phones battery keep draining....
magonydavid said:
Ohh but I don't know why my phones battery keep draining....
Click to expand...
Click to collapse
Maybe you have some apps which keeps your device awake, try with another rom/kernel kombination (dont use 5.0 roms to test battery as battery is better on stock based roms)
nikola016 said:
Maybe you have some apps which keeps your device awake, try with another rom/kernel kombination (dont use 5.0 roms to test battery as battery is better on stock based roms)
Click to expand...
Click to collapse
99% of the time this is the case - a rogue app running, or one of its services, keeping the phone awake and running in the background.
OP, try this: reset the phone to factory settings, restart it and then just leave it like that for 30 minutes or so. Don't even enter your SIM PIN or anything. If the phone is still heating up, the unit is defective and requires service (it is not impossible that the battery is shorting out somewhere somehow).
robogo1982 said:
99% of the time this is the case - a rogue app running, or one of its services, keeping the phone awake and running in the background.
OP, try this: reset the phone to factory settings, restart it and then just leave it like that for 30 minutes or so. Don't even enter your SIM PIN or anything. If the phone is still heating up, the unit is defective and requires service (it is not impossible that the battery is shorting out somewhere somehow).
Click to expand...
Click to collapse
Under factory reset you mean I have to backup the original LG software or my lollipop rom is good?
No, just try resetting to factory defaults (obviously, back up everything important), you can do it either through the menu or the recovery.

Battery 🔋 Calibration

Hiii guysss...!!!!
Now Days Rooting is our daily part of life
after lot off customization and custom Roms
some times our battery gives some problems such as battery drain all other
so i found one solution on it......
Battery Calibration ......!!!!!
No Need Of Any App For It Just Follow this simple steps ....
We will start with a basic necessity for good battery performance CALIBRATION.
Calibration is the process where you get your battery to hold as much charge as it can and the battery meter to display the correct reading. I think when you do this, you will be suprised how much more charge your battery takes than the phone thinks it needs.
1. Charge your phone 100% while it’s on.
2. Use root explorer, astro, or file manager of choice and go to /data/system and find batterystat.bin. Delete it. Then use your smartphone as usual ?
After total use You can power it off on 15% also (beetter to use till shutdown ) but not upper on that .....!!!
3. power off and allow charge it up to 100%. (This may take longer than you think)
4. After Full Charge Power it on, and use it....
5. Go back to step 2 and repeat one more time.
6. After doing this procedure 2-3 times your mobile ? will give you cool ? battery ? backup surely
It's works on every version 4.0 kitkat -6.0 marshmallow
Thank You ...
ViksAndroiD
Hope it's become helpful to everyone
It's useless. batterystat.bin file recreated itself when fully charge your phone!
Alexey71 said:
It's useless. batterystat.bin file recreated itself when fully charge your phone!
Click to expand...
Click to collapse
It's not useless.
This is how you calibrate a lithium-ion battery.
JonnyBorneo said:
It's not useless.
This is how you calibrate a lithium-ion battery.
Click to expand...
Click to collapse
batterystat.bin deleted and create automatically, each time after charging
Alexey71 said:
batterystat.bin deleted and create automatically, each time after charging
Click to expand...
Click to collapse
The file doesn't have anything to do with calibration.
It's just a log file. By deleting it you create a blank log and it starts anew.

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