http://forum.xda-developers.com/showthread.php?t=1800268
i'm using this ROM and it automatically shutdowns my Nexus 7 when the battery is below 20%, anyway to fix this ??
P/s: some people say that because it did not calibrate my battery after flashing the ROM, but i wiped everything, included battery stats, is that ok ? or i have to calibrate it ?
You can't calibrate the battery. Anyone who told you to do so deserves to be slapped with a pimp hand. Likewise, never waste your time sipping battery stats. It is in no way, shape, or form going to affect battery life or the battery fuel gauge.
Try a factory reset. If that doesn't correct the problem, try the stock rom. If you still have the problem, it's defective hardware.
Sent from my Nexus 7 using Tapatalk 2
najaboy said:
You can't calibrate the battery. Anyone who told you to do so deserves to be slapped with a pimp hand. Likewise, never waste your time sipping battery stats. It is in no way, shape, or form going to affect battery life or the battery fuel gauge.
Try a factory reset. If that doesn't correct the problem, try the stock rom. If you still have the problem, it's defective hardware.
Sent from my Nexus 7 using Tapatalk 2
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Click to collapse
Thank you so much :good:
@ but actually when i change to another rom, this did not happen, so i think it is a software problem
Related
Hello!
I rooted my phone as of yesterday, I charged it all night and when I took it off today the battery went from completely full to dead withint 3 hours of no use. I did not use the phone at all.
Any ideas?
If you just rooted your phone, you should not have battery drain... Try to temporarily disable root (with Voodo OTA RootKeeper for exemple)
Use better battery stats to nail down which app is causing the drain
Did you try wiping your battery stats in CWM - advanced?
There's also an app, Battery Calibration, on the Play Store that may help with that.
Not uncommon to get weird battery readings after changing rom's or rooting.
slaphead20 said:
Use better battery stats to nail down which app is causing the drain
Click to expand...
Click to collapse
+1 that app will tell you exactly what's bogging down your cpu, and which apps prevent proper deep sleep mode.
Sent from a galaxy far, far away
PermaFried said:
Hello!
I rooted my phone as of yesterday, I charged it all night and when I took it off today the battery went from completely full to dead withint 3 hours of no use. I did not use the phone at all.
Any ideas?
Click to expand...
Click to collapse
This is soooo strange. Not a normal behavior!! Before you root your phone, how the battery lifes goes??? Are you in a stock or modified ROM? Wich kernel are you using?
I faced this issue a couple weeks ago. Android S.O was the culprit and it was driving me crazy. I was using a custom ROM (RemICS-UX). I solved the problem returning to stock and erasing everything, then i reflashed the ROM and the kernel, in my case Devil3 0.79. If you want to give it a try!!
After that my batterys life is pretty fine, during at least 2 days!
Feel free to ask anything you want! Cheers mate
Sent from my GT-I9000 using xda app-developers app
Go through a couple more full charge cycles, if android os usage isn't very high then, it should be fine.
Edit: on second thought, draining the battery without use in 3 hours is extreme, and would suggest that the CPU is running at max speed all the time. If it doesn't solve itself or improve a lot after a few more charge cycles, reflash everything.
Using GT-I9000 my sent Tapatalk 2 from.
Did you just root your phone or did you flash another ROM? Some ROMs have horrible battery life.
The stock battery usage monitor (Settings>Battery) should be enough to tell you what ate your battery. If it's a particular app you're running, try disabling that and see if it improves. If the usage is mostly "Android System", "Mobile standby", or something like that, then you have a tougher problem. The free app CPU spy will let you know if something is keeping your CPU usage high. Better battery stats is pretty cheap and will give you much more specific information.
+1s for BetterBatteryStats and waiting a few charge cycles before judging/debugging your battery drain, especially if you changed your kernel to root or flashed a rom.
I find that after flashing a new rom or kernel my phone, the battery level shown in recovery mode is higher than in the rom's settings, for a couple days. (You can see batt level in semaphore's recovery). I once dud a lazy search about this and found nothing, but I figure that's what is meant about waiting a few cycles gir your battery to calibrate.
sent from a telephonic device
groksteady said:
+1s for BetterBatteryStats and waiting a few charge cycles before judging/debugging your battery drain, especially if you changed your kernel to root or flashed a rom.
I find that after flashing a new rom or kernel my phone, the battery level shown in recovery mode is higher than in the rom's settings, for a couple days. (You can see batt level in semaphore's recovery). I once dud a lazy search about this and found nothing, but I figure that's what is meant about waiting a few cycles gir your battery to calibrate.
sent from a telephonic device
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Click to collapse
or u can just use the app batterycalibration after flashing a new rom
Friend try with this modem..
http://forum.xda-developers.com/showthread.php?t=993576#
TheWeeknd said:
or u can just use the app batterycalibration after flashing a new rom
Click to expand...
Click to collapse
There's no such thing as "calibrating your battery". It's a myth. Wiping your battery stats file doesn't do anything other than reset the tracking of what's using power. It doesn't magically fix your battery meter. Flashing a new ROM doesn't leave left over data, again a myth.
Battery life is never consistent after flashing because your ROM needs to "settle" for a day or two first and during that time your ram and cpu usage are all over the place.
The rest is a placebo effect.
Sent from a galaxy far, far away
Idea
I think I may know what is happening to you as of now. Try to bring up the Battery settings if you are on ICS and take a screenshot and post it here. If my 'spider' senses are correct, your phone did not go to 'sleep' and remained awake.
Since I can't put my signature for unknown reasons...(Maybe because I just created an account since I did not want my old one)
Please donate to [email protected] (html not allowed yet) on Paypal if I helped you
Currently I'm experiencing a huge battery drain too. I used both tools which where mentioned here in this thread and when the drain occours, CPU spy reports that my SGS didnt go in deep sleep at all with turned off display, it was at least at 100mhz all the time! I attached 2 logs from better battery stats and it seems like the NotificationService is causing it?
I'm using JW6 PDA JW4 Modem and JVC CSC in combination with the MNGB 0.5.8 Kernel.
Definitely, now you got to find out what is causing it!
Deleted
Anyone know if calibration is necessary after installing a custom ROM on the nexus 10?
Sent from my Nexus 10 using Tapatalk 2
Someone can correct me if I'm wrong but I believe a Google engineer came out and said that calibrating your battery did absolutely nothing. I haven't calibrated any batteries since I owned an Epic back in 2011 and it doesn't have appeared to hurt my battery life at all.
Wow old school.. I remember when battery calibration was all the placebo rage a few years back.. :laugh:
Just use your device normally and charge it normally. No amount of black magic and battery draining tricks is going to improve anything.
From my experience I can say it didnt help at all. I did this on multiple devices, different custom roms and stock roms and it is really more a placebo effect than anything else. Sometimes I think it helped, but a day after I see the usual behavior..
wjsmaggle said:
Someone can correct me if I'm wrong but I believe a Google engineer came out and said that calibrating your battery did absolutely nothing. I haven't calibrated any batteries since I owned an Epic back in 2011 and it doesn't have appeared to hurt my battery life at all.
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This is correct.
Sent from my S3.
Awesome battery life
Sent from my Nexus 10 using xda app-developers app
There's no such thing as battery calibration.
I am having a battery drainage issue with my Nexus 7 16GB
My Nexus 7 battery drainage pattern have been unstable.recent charge i use 1 day++++ and it is still on 100% battery and after it start to decrease my Nexus off without any battery low warnning at abt 30%.
Anyone have this problem? and any solutions to it?
Anyway my Nexus 7 is not rooted and is up to date of 4.2.2.
Thanks!
Open the thing up and try reseating the battery connector.
peneoark said:
Open the thing up and try reseating the battery connector.
Click to expand...
Click to collapse
doing this wont void my warranty?
Have you tried a external battery widget to see if that gives you an accurate reading of your battery level? What's the battery usage screen say is eating all the battery?
Battery calibrators etc. just don't work. Remove the back cover (it's very easy to do) and unplug the battery. Put the cover back on. No one will be able to tell if you ever opened it or not, unless you break something.
Restore factory settings and see before you play with hardware...
Restoring might work
Sent from my Nexus 7 using xda app-developers app
Read the "Update" in the OP here.
Fixed.
My Nexus4 at any time if it is under 40% will just shut off. I've seen it at 35% and again at 21% just shut off. When I put back on the charger shows 0%.
This has happened both on CM10 and AOKP. Sadly, I'm not able to wipe the battery stats through TWRP nor Koush's... Any ideas on how to fix this?
Why could you not wipe the battery stats in TWRP or CWM? Did it not come up as options, or pop up an error? You could also try the non-touch version of CWM just in case.
There is probably more you can try but my brain isn't doing very well at the moment.
Sent from my Nexus 7 using Tapatalk HD
Wiping batterystats.bin has absolutely nothing to do with what level of battery charge your phone displays nor does it have anything to do with how quickly your battery drains.
https://plus.google.com/105051985738280261832/posts/FV3LVtdVxPT
Your issue sounds more like a problem with your phone, kernel, etc. You might want to make sure that the battery connectors are not loose, test your phone on absolutely stock software, and so on.
imbonez9 said:
My Nexus4 at any time if it is under 40% will just shut off. I've seen it at 35% and again at 21% just shut off. When I put back on the charger shows 0%.
This has happened both on CM10 and AOKP. Sadly, I'm not able to wipe the battery stats through TWRP nor Koush's... Any ideas on how to fix this?
Click to expand...
Click to collapse
Wipe Battery stats bin file.
After trying many different roms you should always do that.
There are many free apps in the store,doing this very job.
You 'll be fine!
Hyperionas said:
Wipe Battery stats bin file.
After trying many different roms you should always do that.
There are many free apps in the store,doing this very job.
You 'll be fine!
Click to expand...
Click to collapse
Not true. :banghead: Did you read the post above yours
Sent from my Nexus 4
spaceman860 said:
Not true. :banghead: Did you read the post above yours
Sent from my Nexus 4
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Click to collapse
Yeap,i did see the post
Anyway,it seems more like a miscalibration thing to me. (wrong battery readings)
As it has been said before,better to revert to the stock rom/kernel and see if the problem persists.
This will let you know if it's a battery/hardware problem.
So when a woke up today,my phone's led was blinking(green) and I wanted to check the notifs.But it was turned off,I couldn't wake it up.Then hard rebooted,and realized that the battery is on 1%.Strange cause I went to bed with battery on 56%.I checked the battery stats and it was all good,but
from 56% it went straight down,I mean no downhill or anything.Just from 56% suddenly to 1%.I'm on a stockish rom(overSTOCK v4.2 with stock kernel,running xposed)
So there are multiple questions.
Is this can be a faulty battery?(My device is a refurbished one.I got it a month ago)
Is this can be a false batttery status display?I chose a mod to get battery percentage(overstock has aroma installer)
If so,the battery stats relies on the battery status display on statusbar?If so this,It can be the mod that caused this by not showing be proper percentage of my current battery status.
Or anything else,that would cause this?
Thank you!
Sounds like its your battery. There is various post like yours where users battery just go bad. Give it a cycle and if it's still doing the same, its most likely your battery.
Sent from my Nexus 4 using Tapatalk
jayRokk said:
Sounds like its your battery. There is various post like yours where users battery just go bad. Give it a cycle and if it's still doing the same, its most likely your battery.
Sent from my Nexus 4 using Tapatalk
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Click to collapse
But it was all good until now for one time.Ah,hope it won't happen again
Has happened to me twice. Check this out - http://forum.xda-developers.com/nexus-4/help/strange-battery-problem-100-to-0-t2553226