Database Users

Nexus 7 dying at 25% battery

Without fail my Nexus 7 seems to die around 25% battery. Strangely, this only happened after I unlocked/rooted it, but now it happens every time. I even charged to full, used CWM to wipe battery stats and let it run down from there, still no dice.
Safe to say I should get a replacement?

No? I'd be surprised if I'm the only one having this problem... Seems like the Nexus 7's hardware issues are pretty widespread.

I must admit, when it died, I dont know what % the battery was at.

omnikai said:
No? I'd be surprised if I'm the only one having this problem... Seems like the Nexus 7's hardware issues are pretty widespread.
Click to expand...
Click to collapse
Since youve rooted it, your warranty may be void, assuming that it wont be have you tried a custom rom? as daft as it sounds i had this issue on my old HTC desire, but a custom rom did fix this.
I havent had any issues at all with my nexus 7, my nexus was down to 8% last night when i plugged it in to charge before bed.
Aslo i wouldnt assume there are "wide spread" issues with the nexus7, for every device ever made there are always numerous threads about faults and the odd pixel being missing, people like to come onto the internet to broadcast there views when they feel they have been slighted or wronged in someway, if there was any "widespread issues with the nexus" (such as apples antenagate issue with the iphone 4) then it would be everywhere over ever tech blog.

Jjust reflash a different Rom
》》》Samsung Galaxy S3《《《

Been down as low as 2% before relenting and letting the poor thing power up. Rooted and on jr5.

Thanks for the feedback all, perhaps I'll try un-rooting it while at 100% battery and see if it fully discharges. Perhaps it's just sensitive about the battery capacity when it changes ROMs/Bootloader status.

My Nexus 7 is doing the same thing at 20%. What happened to yours?

Have you tried a factory reset? That's fixed similar problems on other devices.

Factory reset yes, but not at 100% charge.

Mine dies at/or around 30% - I'm stock+not rooted.

Factory reset it. It doesn't matter what the charge percentage is. I did it to mine and it's working fine

clear your batter stats in CWM, full charge, full discharge, full charge

davidcampbell said:
clear your batter stats in CWM, full charge, full discharge, full charge
Click to expand...
Click to collapse
I tried this and it didn't work for me. The only thing that did was a factory reset by flashing the stock image through the root manager tool.

A user named NeoMagus has received two units with this issue, but I haven't seen many people mention it otherwise.
http://forum.xda-developers.com/showthread.php?p=30787728#post30787728
I'm new to tablets but I returned a Fire with the same problem. I assume it's a freak battery thing and not something innate to this device.

Yup my first C6 and last C7 also had this problem. Charged/Decharged fine for about a week, then just started turning off at about 19-20%. The screen would also display in very small text "show low low battery logo". Re-flashing stock, wiping, calibrating by deleting batterystats.bin, nothing helped, always died at 20%. Just ended up exchanging both so don't know what to tell you guys, everyone else seems to be fine so my only conclusion is bunk battery

omnikai said:
Without fail my Nexus 7 seems to die around 25% battery. Strangely, this only happened after I unlocked/rooted it, but now it happens every time. I even charged to full, used CWM to wipe battery stats and let it run down from there, still no dice.
Safe to say I should get a replacement?
Click to expand...
Click to collapse
Flash back stock ROM, lock boot loader and see if it fix. At this point, you got back your warranty and can ask for replacement
Sent from my Nexus 7 using Tapatalk 2

I have the same issue on mine, which is stock/unrooted. I just did a factory reset and it's been okay so far, but it's a little early to tell if it really worked.
**UPDATE** - Doing a factory reset did not fix the issue. It died again after some more use. I'm going to return it to Google.
**UPDATE 2** - After connecting the device to the charger and powering it on again it reported 0% battery. I charged it back up to 100% and I've currently run it back down to 7%. I'm not sure how or why it's working now, but it does seem to be a problem with the software misreporting the remaining battery life.

Mine shut down at 9% last night. Not that bad but not ideal I think it should go to 2-4% or 'go down with the ship' at 0% like my phone does.
Oh well I'm going to get a replacement after my next trip due to audio and touchscreen issues, I've been putting it off in hopes that they iron it out but I can't wait much longer a dead left headphone and random zooming when I scroll is a drag.

Same here ,last week my N7 died at 15% battery
but now at 20% ..
no Low battery Logo show
Should i do Factory Reset ???

[Q] Battery defect or rom issue?

Hello!
Sorry I can't post this in the Paranoid Android thread yet. As a noob I can't post in that forum until I have 10 posts so I'm at a loss as to where I should post this.
Anyway, I just put the new 2.1799 PA ROM on my Nexus 7. Unfortunately, I seem to have a serious battery drain when the screen is on. I have read many posts where people claim to have easily achieved 6+ hours of active screen time per battery charge whereas I'm only getting 3-4 hours of active screen time per charge, almost all of it related to web surfing. I have a strong wifi signal and I keep my screen brightness around 20/30 range. I'm not sure if it's the ROM or if my battery is defective.
I have also read about a battery calibration app through a different thread. Is that necessary for the PA ROM? I didn't see anything in the tutorial mentioning a battery calibration.
Included are two pictures, although they aren't very indicative of my problem as my tablet was sitting in my backpack for most the day.
Please tell me I'm just being paranoid! Thank you for the help!

thatnoob said:
Hello!
Sorry I can't post this in the Paranoid Android thread yet. As a noob I can't post in that forum until I have 10 posts so I'm at a loss as to where I should post this.
Anyway, I just put the new 2.1799 PA ROM on my Nexus 7. Unfortunately, I seem to have a serious battery drain when the screen is on. I have read many posts where people claim to have easily achieved 6+ hours of active screen time per battery charge whereas I'm only getting 3-4 hours of active screen time per charge, almost all of it related to web surfing. I have a strong wifi signal and I keep my screen brightness around 20/30 range. I'm not sure if it's the ROM or if my battery is defective.
I have also read about a battery calibration app through a different thread. Is that necessary for the PA ROM? I didn't see anything in the tutorial mentioning a battery calibration.
Included are two pictures, although they aren't very indicative of my problem as my tablet was sitting in my backpack for most the day.
Please tell me I'm just being paranoid! Thank you for the help!
Click to expand...
Click to collapse
The battery recalibration is a myth, but there is also no harm in trying it.
according to the pics you have attached, there doesn't seem to be anything wrong.
Battery also drains faster if you have too many apps that have services running.
Ex: Facebook.

I know there is a battery warranty, but how bad does it have to be to get it replaced? My battery cannot reach the 9.5hrs of 720p video playback (with headphones in) as achieved by Asus. I can only get 8hrs. From normal usage, I am only able to get 6 hours.

The ROM has less to do with the battery than the kernel does.
I would say try flashing another kernel. The default cyanogenmod kernel that comes with Paranoid Android didn't give me very good battery life.
Franco kernel gives me excellent battery life. Other good ones for battery are Faux or Motley.
You might like reading this thread about kernels and battery life.
http://forum.xda-developers.com/showthread.php?t=1889571
Sent from my Paranoid Nexus 7

AlleN7 said:
I know there is a battery warranty, but how bad does it have to be to get it replaced? My battery cannot reach the 9.5hrs of 720p video playback (with headphones in) as achieved by Asus. I can only get 8hrs. From normal usage, I am only able to get 6 hours.
Click to expand...
Click to collapse
That is in the normal range i would say, Companies usually exaggerate.
As suggested try franco's kernel.
He has a free kernel flashing app on the play store.

My issue is with how the battery percentage is running down......
Charge the N7 to max and use it for a good 2 hours and the battery STILL reads 100%.
Even if I then shut down and reboot it still shows 100%, then all of a sudden it will start to drop very slowly at first until it gets to around 40% which it then shuts down and will not reboot, obviously void of any battery cells.
Clearly it's a calibration issue.
This is on a stock non-rooted machine.

vinny86 said:
That is in the normal range i would say, Companies usually exaggerate.
As suggested try franco's kernel.
He has a free kernel flashing app on the play store.
Click to expand...
Click to collapse
I tried his kernal. I did my video play back test and I got the same 8 hours as before. During normal usage I think I will get about 30-40 more minutes. Still not what others are getting

Beards said:
My issue is with how the battery percentage is running down......
Charge the N7 to max and use it for a good 2 hours and the battery STILL reads 100%.
Even if I then shut down and reboot it still shows 100%, then all of a sudden it will start to drop very slowly at first until it gets to around 40% which it then shuts down and will not reboot, obviously void of any battery cells.
Clearly it's a calibration issue.
This is on a stock non-rooted machine.
Click to expand...
Click to collapse
Try a factory reset. If that doesn't work, you're more than likely actually looking at it being a hardware issue.
Sent from my Nexus 7 using Tapatalk 2

najaboy said:
Try a factory reset. If that doesn't work, you're more than likely actually looking at it being a hardware issue.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Factory reset was the very first thing I tried when it started playing up.... I'm hoping when 4.1.2 rolls out it may clear it. If not then I'll have to look at doing a root and access the battery file to see if deleting may help.
Thing is a recharge should clear out the battery file stats and calibrate, which clearly it's not.
Apart from this the N7 is flawless so it's staying with me. Running hours is the same, just doesn't give an accurate reading of how the battery is running down.
It's not a big issue.... to be honest I'm more curious than annoyed.

Beards said:
Factory reset was the very first thing I tried when it started playing up.... I'm hoping when 4.1.2 rolls out it may clear it. If not then I'll have to look at doing a root and access the battery file to see if deleting may help.
Thing is a recharge should clear out the battery file stats and calibrate, which clearly it's not.
Apart from this the N7 is flawless so it's staying with me. Running hours is the same, just doesn't give an accurate reading of how the battery is running down.
It's not a big issue.... to be honest I'm more curious than annoyed.
Click to expand...
Click to collapse
Have you tried installing a 3rd party battery app to see if it registers the correct battery output? This is the one I have used, works good. GL
https://play.google.com/store/apps/details?id=net.hubalek.android.reborn.beta&hl=en

snipe2nite said:
Have you tried installing a 3rd party battery app to see if it registers the correct battery output? This is the one I have used, works good. GL
https://play.google.com/store/apps/details?id=net.hubalek.android.reborn.beta&hl=en
Click to expand...
Click to collapse
Yes thanks.... Tried quite a few. Nothing changes.

Beards said:
Factory reset was the very first thing I tried when it started playing up.... I'm hoping when 4.1.2 rolls out it may clear it. If not then I'll have to look at doing a root and access the battery file to see if deleting may help.
Thing is a recharge should clear out the battery file stats and calibrate, which clearly it's not.
Apart from this the N7 is flawless so it's staying with me. Running hours is the same, just doesn't give an accurate reading of how the battery is running down.
It's not a big issue.... to be honest I'm more curious than annoyed.
Click to expand...
Click to collapse
You do realize that wiping batterystats.bin has absolutely nothing to do with the battery fuel gauge, right? It does not "calibrate" the battery or affect reported charge. The myth of wiping battery stats has long since been debunked by Google's Android engineers. The only info contained in the file is a list of apps that used battery since the last full charge.
The only other thing you could do besides a factory reset is see if 4.1.2 fixes it for you. If not, then it's definitely hardware causing the issue- the battery charge is likely being improperly read and reported by the battery itself.
Sent from my Nexus 7 using Tapatalk 2

Battery life on Oreo

I flashed the stock image and i found the battery life abysmal. Not even a day
7-8 hrs tops with barely any usage
Anyone has experienced the same issue

Give it a few days and see if it improves. Sometimes drastic updates can have adverse effects on the battery
Sent from my Nexus 6P using Tapatalk

I have one of the best battery life on O right now and I'm not pointing fingers to anything but google.
I was excited after hearing "Android Vitals" and they are on point about it.
Try to flash a custom kernel like EX or Flash though Ex's kernel isn't fully committed with the O source code but you may at least try it. On a side note there are still apps out there that aren't coded properly for O which would probably hinder your angler so look out for them a lot.

Thank you everyone for pitching in
Like I mentioned I flashed the stock image and gave it 2 days but as I disconnect the phone from the charger at around 9 AM (100%) , by 3-4 PM I am being left with 30% or less . By 6 PM it starts beeping as it hovers 15%
I barely use the phone at work. I just do occasional messaging (text and whatsapp). I removed all apps except the ones that I really need. No games...etc
I did flash the other day the EX Kernel ( Beta for O) for which I have the paid manager version.
It drives me crazy as it seems to be draining at a very fast rate with no apparent reason.
What's even more frustrating is that the built in battery app doesn't shed much light. The process that takes the most battery is "System" but that's all.
Maybe it's time for a new phone

rainfactor said:
Thank you everyone for pitching in
Like I mentioned I flashed the stock image and gave it 2 days but as I disconnect the phone from the charger at around 9 AM (100%) , by 3-4 PM I am being left with 30% or less . By 6 PM it starts beeping as it hovers 15%
I barely use the phone at work. I just do occasional messaging (text and whatsapp). I removed all apps except the ones that I really need. No games...etc
I did flash the other day the EX Kernel ( Beta for O) for which I have the paid manager version.
It drives me crazy as it seems to be draining at a very fast rate with no apparent reason.
What's even more frustrating is that the built in battery app doesn't shed much light. The process that takes the most battery is "System" but that's all.
Maybe it's time for a new phone
Click to expand...
Click to collapse
Yes, I went back to paranoid nougat, because I got the same
battery experience as you with O. But I'm reading that you use
what's app, do you can play a video if someone sending you one? Since the O previews for me the videos are just loading but not playing, and that's only the case by using android O, doesn't matter if I use what's app or what's app beta.

I got the 2% battery drain bug and sometimes i dont, ive reflashed oreo about 8 times lol, sometimes it dies at 15%..

coremania said:
Yes, I went back to paranoid nougat, because I got the same
battery experience as you with O. But I'm reading that you use
what's app, do you can play a video if someone sending you one? Since the O previews for me the videos are just loading but not playing, and that's only the case by using android O, doesn't matter if I use what's app or what's app beta.
Click to expand...
Click to collapse
I haven't had any issues with any of the apps. Whatsapp works well I can play videos see the pics etc
I think I am going to get back to Paranoid
I read somewhere I needed to flash first the Nougat stock before attempting to put any custom ROM. Is that what you did?

rainfactor said:
I haven't had any issues with any of the apps. Whatsapp works well I can play videos see the pics etc
I think I am going to get back to Paranoid
I read somewhere I needed to flash first the Nougat stock before attempting to put any custom ROM. Is that what you did?
Click to expand...
Click to collapse
No, just my twrp backup, you can stay on latest bootloader and radio. Strange thing with whats app, may oreo doesn't like my internal, if final release come I will complete clean flash with fastboot.
Edit: check latest Pixeldust rom, it's like pa with a bit more useful features

I think my phone may be defective
Even on Paranoid the battery seems bad
The miscellaneous was on top of the list . What does that mean .... ?

Battery update.- Running kylo kernel r9 , working great so far just a few personal tweaks applied.

rainfactor said:
I think my phone may be defective
Even on Paranoid the battery seems bad
The miscellaneous was on top of the list . What does that mean .... ?
Click to expand...
Click to collapse
I'm not sure what you're expecting, give the rom some time and charges to settle battery. How old is your phone? If you don't have patience flash stock image and completely wipe your phone if you think something is faulty.

Well...
I used to get like a day out of the phone . With my minimal usage I would disconnect it in the morning and still have like 30-40% when getting back home in the evening.
All of the sudden one day I was just on my way home and I noticed the phone was off. I tried power it back on but it kept on flashing red as it was totally drained. Since then battery went downhill.
I'm not crazy and I do not have unrealistic expectations but 5 or 6 hours of battery with almost no usage seems a bit off. I gauged just by looking at the numbers being something ridiculous like 10% an hour.
I did wipe and flash the stock few times. Oreo then Nougat
Since the issue persisted I am thinking the phone just went bad.

If your battery is faulty, then it's faulty, that's why i asked how old your phone is. Ain't there battery health apps to take a look how worse it is.

Yeah I think it's maybe 1yr and half old.
I'm starting to evaluate those Essentials and Pixels 2.
Or better get a Pixel 1st gen if they drop low enough

Sounds to me like your battery is worn out. I'm amazed that you got 1.5 years out of it because I've seen posts from people who didn't even make it a year. You mentioned that it's draining 2% at a time and shuts down at 15%, which are pretty strong indicators that your battery is shot.

rainfactor said:
Yeah I think it's maybe 1yr and half old.
I'm starting to evaluate those Essentials and Pixels 2.
Or better get a Pixel 1st gen if they drop low enough
Click to expand...
Click to collapse
Nokia 8 (pure android) is an option too, but I would change the battery, n6p is still a very nice piece of hardware. Essential
is a hype phone til now.

Do you have a trusted source you can share for a battery?
There are so many floating around and I'm not sure about their quality

rainfactor said:
Do you have a trusted source you can share for a battery?
There are so many floating around and I'm not sure about their quality
Click to expand...
Click to collapse
Hard to say, I will run accubattery for week, after a first charge it doesn't look very promising for me too, and my phone is a bit over a year old. may some other users know a better tool or app, but this one doesn't seem to be so bad. Let's see what happens after some charges.
Akku Gesundheit=Accu Health, sry it's german here.
If you search for a replacement there is a thread here on xda
for the 6p, OEM battery or something like this
https://forum.xda-developers.com/nexus-6p/accessories/oem-battery-t3534410
Edit: may you try to do a rma with your 6p, like this lucky guy
https://forum.xda-developers.com/nexus-6p/general/nexus-6p-google-replaced-pixel-xl-t3660808

rainfactor said:
I think my phone may be defective
Even on Paranoid the battery seems bad
The miscellaneous was on top of the list . What does that mean .... ?
Click to expand...
Click to collapse
Same for me, with Oreo it's even worse

Update, kylo kernel r9, works fine however my phone now dies at 5% instead of 15%-20% much better but still.

LG V20 Battery issues! Roll back? Root

So here's my little situation, I wanted to just keep this phone stock and not root it for once since I do it for every phone I get. I've only had this thing for a week and I love it... Mostly.
Problem is I have ABYSMAL battery life, loosing 10%+ on "Phone Idle" "Android OS" and "Android System" which typically sucks up around 30% of my battery usage and my SOT can be as low as 60 minutes if I let my phone sit while I work for example. This seems to not be an isolated issue however I have yet to find anybody experiencing such a dramatic loss of battery.
So my questions are is there ANY way to fix this? Been looking all over and it seems to be a software issue thus creating more questions. Looked around and I can't seem to find a way to help this problem.
As far as I am aware there is ABSOLUTELY no way to downgrade my T-Mobile H91810s nor is it possible to root it.
Is this true or am I missing something? I just bought this thing brand new after my ZTE Axon 7 got stolen. ):
So my three main questions: Has anyone find a way to lower battery consumption from those three programs? Is there ANY way to rollback to a previous firmware? Or is it possible to root the H91810s firmware?
I would really appreciate any feedback or answerers from the XDA community. I love this forum and 95% of the time there's anyways a solution to my problems from the amazing people but I'm afraid this might be the other 5%. Anyway thank you again for any feedback!

Losing that much battery that quickly is in no way normal. I get between 3 to 4 hours sot and somewhere in the neighborhood of 15 hours of total life. That's normal usage. Most people here seem to get somewhere in that range or more, I don't try too hard to conserve battery. If you have already factory reset to no avail I would first pick up an extra battery. Shouldn't be any more than $20. This will confirm whether this is a battery issue or related to hardware/software on the phone. If that doesn't work you can grab the patched lgup (somewhere in the guides section) and the 10r h918 kdz. Since you are on arb 1, you can roll back to anything with the same arb version. 10r is arb 1 as well, so it should flash no problems. Put the phone in download mode, and click partition dl on the patched lgup gui. Select the 10r kdz and it will flash every single partition to the phone. This will be a brand new phone with factory fresh firmware/software. Do not attempt to flash anything lower than 10r as I have no idea when arb was implemented for the h918 (I believe it was after 10k). If the problem STILL persists after a kdz restore, then I would guess the unit is defective in someway. @runningnak3d any suggestions or corrections to what I have stated? You know a heck of a lot more when it comes to all things LG and v20

I have never had that kind of battery problem on the H910 or H918 no matter the firmware version. I agree with the suggestion of getting a new battery.
FYI - ARB 1 was implemented in 10p, so you can roll all the way back to 10p or anything in between.
-- Brian

toastyp said:
Losing that much battery that quickly is in no way normal. I get between 3 to 4 hours sot and somewhere in the neighborhood of 15 hours of total life. That's normal usage. Most people here seem to get somewhere in that range or more, I don't try too hard to conserve battery. If you have already factory reset to no avail I would first pick up an extra battery. Shouldn't be any more than $20. This will confirm whether this is a battery issue or related to hardware/software on the phone. If that doesn't work you can grab the patched lgup (somewhere in the guides section) and the 10r h918 kdz. Since you are on arb 1, you can roll back to anything with the same arb version. 10r is arb 1 as well, so it should flash no problems. Put the phone in download mode, and click partition dl on the patched lgup gui. Select the 10r kdz and it will flash every single partition to the phone. This will be a brand new phone with factory fresh firmware/software. Do not attempt to flash anything lower than 10r as I have no idea when arb was implemented for the h918 (I believe it was after 10k). If the problem STILL persists after a kdz restore, then I would guess the unit is defective in someway. @runningnak3d any suggestions or corrections to what I have stated? You know a heck of a lot more when it comes to all things LG and v20
Click to expand...
Click to collapse
any hope for F800L model? I have abysmal battery life too. I have two batteries so not that and is not helped by factory reboots.
software is fully updated though

roosters93 said:
any hope for F800L model? I have abysmal battery life too. I have two batteries so not that and is not helped by factory reboots.
software is fully updated though
Click to expand...
Click to collapse
Check the battery optimization and see which apps are unoptimized. If you are using the stock apps for messaging/calling then chances are you have bad network reception. I use airplane mode at home because I'm mostly in the dark area where reception is nill, otherwise my phone's battery in standby lasts less than 6hrs or loses 15-20% overnight. I don't know why the modem eats so much battery in the region of poor reception though. (I have Zuk Z2 as well but I never had to switch it to airplane mode at home and it kept on searching for network all the time without alarming battery usage).
Chances are that your replacement battery is faulty or counterfeit too. I have an LG Battery which was manufactured in January 8th 2018 and its working fine, gives me a full day use from morning till night and I remove the phone from charger before leaving for work. Also, make sure you're using a compatible charger. I have used both QC2.0 and QC3.0 chargers with my phone and its charging speed is the same. (ZUK Z2 comes with QC2.0 charger while I have Leeco's QC3.0 charger too, LG's is QC2.0). Try using a non-QC charger as well which will charger ur battery slow but maybe repairs the memory-effect-like problems with your battery.

Pippinkid said:
So my three main questions: Has anyone find a way to lower battery consumption from those three programs?
So my questions are is there ANY way to fix this? Been looking all over and it seems to be a software issue thus creating more questions. Looked around and I can't seem to find a way to help this problem.
As far as I am aware there is ABSOLUTELY no way to downgrade my T-Mobile H91810s nor is it possible to root it.
Click to expand...
Click to collapse
Several things you can try. Depends how long and hard you are willing to keep at it.
For starters when you boot into recovery, do you see an option to wipe cache ? if so wipe, reboot back and see whether it fixes anything

I've had this happen to a couple tablets. You may need to reset the battery logic.
Turn off the phone.
Pull the battery.
Press and hold the power button for one full minute.
Let the phone sit for 10 minutes without the battery in it.
Put the battery back in and boot up.
I hope this works for you.

androiddiego said:
I've had this happen to a couple tablets. You may need to reset the battery logic.
Turn off the phone.
Pull the battery.
Press and hold the power button for one full minute.
Let the phone sit for 10 minutes without the battery in it.
Put the battery back in and boot up.
I hope this works for you.
Click to expand...
Click to collapse
Am curious as to what 'reset battery logic' means ?
Is this when you use a bigger battery and you want it to recalibrate or something

One Twelve said:
Am curious as to what 'reset battery logic' means ?
Is this when you use a bigger battery and you want it to recalibrate or something
Click to expand...
Click to collapse
A feature called Battery Stats, which keeps track of battery capacity, when it is full or empty. The problem is that it sometimes becomes corrupted and starts displaying data that isn’t real. This is an attempt to get the OS to correct this information.
(Courtesy of Androidpit)

here we are ten days later and the OP has yet to show. I suppose this problem must not be a problem anymore ?

rctd and Triton are really the batteries EATERS!!!.I uploaded h918 10s kernel with it removed

androiddiego said:
A feature called Battery Stats, which keeps track of battery capacity, when it is full or empty. The problem is that it sometimes becomes corrupted and starts displaying data that isn’t real. This is an attempt to get the OS to correct this information.
(Courtesy of Androidpit)
Click to expand...
Click to collapse
The same is happening with my LG V20 H918. When I charge it using a fast charger (I have a Motorola G5 Plus), it shows me fast-charging and simply shows 100% within 10-15 minutes. That means it is wrong information.
So I tested by using my V20 until it got discharged and turned off automatically, and then charged it completely for several hours. What happened next, its battery worked for full 2 days.

bountyman334 said:
rctd and Triton are really the batteries EATERS!!!.I uploaded h918 10s kernel with it removed
Click to expand...
Click to collapse
any info on what Triton is?? I see that in the processes too often as well...

My guess would be something related to rctd...ccmd doesn't seem to hurt nothing and from what I read...(a little)..ccmd is a security fuse or exploit..that kicks in the lock-out timer for password...or criminals as us..:silly:..but I found the Triton file inside the in it.rc inside the kernel and turned it off.. And changed the way it wrote|write..to the system per se..

Pippinkid said:
So here's my little situation, I wanted to just keep this phone stock and not root it for once since I do it for every phone I get. I've only had this thing for a week and I love it... Mostly.
Problem is I have ABYSMAL battery life, loosing 10%+ on "Phone Idle" "Android OS" and "Android System" which typically sucks up around 30% of my battery usage and my SOT can be as low as 60 minutes if I let my phone sit while I work for example. This seems to not be an isolated issue however I have yet to find anybody experiencing such a dramatic loss of battery.
So my questions are is there ANY way to fix this? Been looking all over and it seems to be a software issue thus creating more questions. Looked around and I can't seem to find a way to help this problem.
As far as I am aware there is ABSOLUTELY no way to downgrade my T-Mobile H91810s nor is it possible to root it.
Is this true or am I missing something? I just bought this thing brand new after my ZTE Axon 7 got stolen. ):
So my three main questions: Has anyone find a way to lower battery consumption from those three programs? Is there ANY way to rollback to a previous firmware? Or is it possible to root the H91810s firmware?
I would really appreciate any feedback or answerers from the XDA community. I love this forum and 95% of the time there's anyways a solution to my problems from the amazing people but I'm afraid this might be the other 5%. Anyway thank you again for any feedback!
Click to expand...
Click to collapse
Could be a bad battery. I bought a battery and for some reason it won't let the processor go offline. With 2 of the batteries the phone sleeps just fine, but with the third battery I get horrible battery life and it shows Android system and phone idol eating up battery life and also 3c toolbox shows that the processor is not going offline. Kind of strange, but could just be a bad battery. You can get a new one on eBay for $9 and free shipping! The last one I got is great!
Sent from my [device_name] using XDA-Developers Legacy app

I bought a used Sprint v20 in "VG" condition. The phone looks really clean. But the phone is getting very hot with light browser use in a short time, and drains very quickly. I didn't install any facebook or anything but it may come with Sprint. Anyhow the battery issue is pretty bad so far. However I decided to turn off the location and that seems like it may be part of the problem. However not terribly happy that the GPS eats the battery and causes heat issues, but what can I do. Also noticed someone else with problems mentioned the verizon model. I wonder if the Sprint and Verizon versions have issues. :/ Also my battery was manufactured in 2017/02 and is official. I could replace it but with the heat and GPS issues, it seems like the problem is likely hardware / software related and not the battery itself.

Pippinkid said:
So here's my little situation, I wanted to just keep this phone stock and not root it for once since I do it for every phone I get. I've only had this thing for a week and I love it... Mostly.
Problem is I have ABYSMAL battery life, loosing 10%+ on "Phone Idle" "Android OS" and "Android System" which typically sucks up around 30% of my battery usage and my SOT can be as low as 60 minutes if I let my phone sit while I work for example. This seems to not be an isolated issue however I have yet to find anybody experiencing such a dramatic loss of battery.
So my questions are is there ANY way to fix this? Been looking all over and it seems to be a software issue thus creating more questions. Looked around and I can't seem to find a way to help this problem.
As far as I am aware there is ABSOLUTELY no way to downgrade my T-Mobile H91810s nor is it possible to root it.
Is this true or am I missing something? I just bought this thing brand new after my ZTE Axon 7 got stolen. ):
So my three main questions: Has anyone find a way to lower battery consumption from those three programs? Is there ANY way to rollback to a previous firmware? Or is it possible to root the H91810s firmware?
I would really appreciate any feedback or answerers from the XDA community. I love this forum and 95% of the time there's anyways a solution to my problems from the amazing people but I'm afraid this might be the other 5%. Anyway thank you again for any feedback!
Click to expand...
Click to collapse
You should be able to root as I was on 10s and was able to root using lafsploit : https://forum.xda-developers.com/v20/how-to/root-lafsploit-h918-version-t3773443
Just make sure to rollback to 10p using LGUP, and getting the right .dll file.
P.S : When you use LGUP choose the 'Upgrade' option and not 'downgrade'

Where's my battery going?! (Phone won't sleep?!)

HELP!!!
I picked up an H918 for my wife to use on T-mobile USA. Since it was used, I also got one of the extended life 4100Mah batteries to hopefully make it last at least the entire day without topping off the charge. She usually averages around 4 - 5 hour SOT, so this seemed like a good option from what I've read, and fits in the original door so I can use the wallet case she wants with it.
But man, her battery life is TERRIBLE! I checked with Accubattery, and it reports that the battery is charging within 99% of it's 4100mah spec, so I don't think its a bad battery. Yet, she can barely go 12 hours with just under 2 hours SOT before the phone dies!
She is unrooted, running stock Oreo.
I installed GSam Battery Monitor and used their ADB commands to give it permission to record deep statistics w/out root (pretty cool, never did that before). I ran it for a little while this morning. Within 3 hours 40 minutes off the charger, she was already down to 72% with barely any SOT. I'm attaching screenshots of the app usage and doze screen (sorry for the phone-snapped-of-phone picture, it's my wifes phone like I said, so it was easier to just snap with my camera than take a screenshot and send it to myself to post).
Maybe I'm not reading this right, but it seems like something is keeping her phone from sleeping. A big culprit seems to be call services, and in my location settings, I noticed it mention that LG IMS was doing a lot of heavy battery drain with location related inquiries.
I thought maybe it was related to WiFi calling, so I turned that off. Cell reception is average.
2 hours later, she's down to 50% so that wasn't it. I don't know what else to try other than hard reset, but we literally just got this and set it up 2 days ago, and its been like this from day one. I don't see why it would be any different the second time around.

It's likely a junk battery. It's really hard to get a good oem replacement battery.
If you shop Amazon look for a Taeozi 4200 or Shemnz 4200. They both have 2 year warranty and decent reviews here on XDA
The Perfine 4100 is also highly recommend
Any Li-polymer should be better
Sent from my ONEPLUS A6010 using Tapatalk

When I bought my wife's phone it had a battery drain/overheat and wakelock issue as well. I fixed it and haven't had an issue since. Here's what I did to fix it:
https://forum.xda-developers.com/v20/help/absolutely-terrible-battery-life-t3531456/post78654160

clsA said:
It's likely a junk battery. It's really hard to get a good oem replacement battery.
If you shop Amazon look for a Taeozi 4200 or Shemnz 4200. They both have 2 year warranty and decent reviews here on XDA
The Perfine 4100 is also highly recommend
Any Li-polymer should be better
Sent from my ONEPLUS A6010 using Tapatalk
Click to expand...
Click to collapse
I did my homework first and got the Perfine from Amazon, not a no-name junk battery. When I couldn't fit it without removing the sticker, the seller was really helpful and actually offered to replace it after checking first that it fit in *THEIR* V20 at the factory. Really solid customer support. And according to Accubattery, it really is the capacity it says. Or at least within 99% of it (I think it estimated 4080 or something like that). So I don't think that's the issue.
pistacios said:
When I bought my wife's phone it had a battery drain/overheat and wakelock issue as well. I fixed it and haven't had an issue since. Here's what I did to fix it:
https://forum.xda-developers.com/v20/help/absolutely-terrible-battery-life-t3531456/post78654160
Click to expand...
Click to collapse
That's actually really interesting- I did take apart the phone to do the thermal mod thing (wiped off the dried up pink gunk and put a thermal pad there), but it seemed pretty clean otherwise inside when I did. How on earth did you figure out that was the problem?
After speaking with some folks on Telegram, Reddit, and other corners of the internet, I have a different theory. A bunch of people told me to let the rom "settle", that battery life is never good after a fresh format or new rom flash. Honestly, the critical thinker in me says that sounds like nonsense. I've never heard of this before and I've been flashing roms for the better half of a decade. I'd think after it takes the time the load up your apps and settings and configure itself, it would be done. But I Googled it, and it seems to be a hotly debated subject.
Those that swear by it claim that whenever you start fresh or flash a new rom, it takes anywhere from one to a few battery cycles before the kernel calms down. Perhaps it is doing some sort of internal calibration based on your battery life and system demands or something like that. The theory seems to be that the Kernel doesn't allow the CPU to fully doze until it is done with this process, which sometimes takes days. I don't know, but the more I read about it, the more it sort of started sound plausible. When I got the phone, I tried out some things on it myself without a SIM card first, just to make sure everything on it checked out before giving it to the wife. Then, I did a hard reset, popped in her SIM card and let it do its thing. That's when we realized battery life was pretty terrible, as after 10-12 hours she already needed to charge... and this was on the 4100mah perfine!
I tried another hard reset, and when that didn't fix it, I decided it was time to root and see if I could get to the bottom of the bad battery. It seemed the kernel was where a lot of it currently went according to battery stat apps. After downgrading my H918 to Nougat so I could install TWRP, I promptly flashed Alpha Omega Oreo 20H and restored her apps. Turns out the next morning we couldn't sync her smartwatch, somehow we broke bluetooth (going into BT settings would crash the phone everytime). So weird, and while we were at it the battery life still wasn't great. So I did a hard reset that evening and found that even with nothing installed, BT was borked. (looking back at it, I think I should have flashed an Oreo rom like the stock 20H rooted first, and THEN the AO rom. I think going straight from nougat might have led to a driver mismatch or something)
Anyway, after that didn't work I flashed the stock rooted 20H rom, and lo and behold bluetooth and everything else is working again! But the battery has been bad all along and is still doing its generally suckiness thing.
BUT... as someone pointed out, if this kernel settle thing is real, I've been pretty much flashing and resetting this thing every other day. If roms need to "settle" first (still a debatable subject), than I never really gave it a chance yet and that's why I'm constantly seeing battery drain from things like Kernel even on different roms! And @pistacios, is it possible that you were having a kernel do the same thing since it was just reset and it just so happened to be that when it calibrated itself you thought you had fixed it by cleaning out the USB port?
All I know is I'm going to give this a couple of days before deciding on a plan B. Seems too simple to be the reason, but hey- I'm desperate.

Dishe said:
I did my homework first and got the Perfine from Amazon, not a no-name junk battery. When I couldn't fit it without removing the sticker, the seller was really helpful and actually offered to replace it after checking first that it fit in *THEIR* V20 at the factory. Really solid customer support. And according to Accubattery, it really is the capacity it says. Or at least within 99% of it (I think it estimated 4080 or something like that). So I don't think that's the issue.
That's actually really interesting- I did take apart the phone to do the thermal mod thing (wiped off the dried up pink gunk and put a thermal pad there), but it seemed pretty clean otherwise inside when I did. How on earth did you figure out that was the problem?
After speaking with some folks on Telegram, Reddit, and other corners of the internet, I have a different theory. A bunch of people told me to let the rom "settle", that battery life is never good after a fresh format or new rom flash. Honestly, the critical thinker in me says that sounds like nonsense. I've never heard of this before and I've been flashing roms for the better half of a decade. I'd think after it takes the time the load up your apps and settings and configure itself, it would be done. But I Googled it, and it seems to be a hotly debated subject.
Those that swear by it claim that whenever you start fresh or flash a new rom, it takes anywhere from one to a few battery cycles before the kernel calms down. Perhaps it is doing some sort of internal calibration based on your battery life and system demands or something like that. The theory seems to be that the Kernel doesn't allow the CPU to fully doze until it is done with this process, which sometimes takes days. I don't know, but the more I read about it, the more it sort of started sound plausible. When I got the phone, I tried out some things on it myself without a SIM card first, just to make sure everything on it checked out before giving it to the wife. Then, I did a hard reset, popped in her SIM card and let it do its thing. That's when we realized battery life was pretty terrible, as after 10-12 hours she already needed to charge... and this was on the 4100mah perfine!
I tried another hard reset, and when that didn't fix it, I decided it was time to root and see if I could get to the bottom of the bad battery. It seemed the kernel was where a lot of it currently went according to battery stat apps. After downgrading my H918 to Nougat so I could install TWRP, I promptly flashed Alpha Omega Oreo 20H and restored her apps. Turns out the next morning we couldn't sync her smartwatch, somehow we broke bluetooth (going into BT settings would crash the phone everytime). So weird, and while we were at it the battery life still wasn't great. So I did a hard reset that evening and found that even with nothing installed, BT was borked. (looking back at it, I think I should have flashed an Oreo rom like the stock 20H rooted first, and THEN the AO rom. I think going straight from nougat might have led to a driver mismatch or something)
Anyway, after that didn't work I flashed the stock rooted 20H rom, and lo and behold bluetooth and everything else is working again! But the battery has been bad all along and is still doing its generally suckiness thing.
BUT... as someone pointed out, if this kernel settle thing is real, I've been pretty much flashing and resetting this thing every other day. If roms need to "settle" first (still a debatable subject), than I never really gave it a chance yet and that's why I'm constantly seeing battery drain from things like Kernel even on different roms! And @pistacios, is it possible that you were having a kernel do the same thing since it was just reset and it just so happened to be that when it calibrated itself you thought you had fixed it by cleaning out the USB port?
All I know is I'm going to give this a couple of days before deciding on a plan B. Seems too simple to be the reason, but hey- I'm desperate.
Click to expand...
Click to collapse
Ive experienced ROMs settling in and battery stabilizing after a few days. But this was pretty far back with the HTC M7 and M8. Most modern phone's I've flashed pretty well settled in within the first few hours. The battery life on this phone was never amazing. It was good to just Ok for most when it was new.
If you flashed the stock rooted rom and still had bad battery life, I still suspect the battery itself. I still recommend one of the battery I listed earlier. If the perfine didn't work out try a different one.
Sent from my ONEPLUS A6010 using Tapatalk

clsA said:
Ive experienced ROMs settling in and battery stabilizing after a few days. But this was pretty far back with the HTC M7 and M8. Most modern phone's I've flashed pretty well settled in within the first few hours. The battery life on this phone was never amazing. It was good to just Ok for most when it was new.
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Click to collapse
Right, with the stock 3200mah battery. With the Perfine 4100, a lot of reports are saying 6-7 hours SOT or at least a full day of regular use. That's good enough, really. Mine is dying at half of that. I'm wondering if I have faulty hardware. I could put the stock battery back in and see if it dies much sooner.
I'm actually wondering if someone can check their mA use per hour with the screen on vs off, and I can see if the numbers make sense on mine. Accubattery is pretty good at the math.

Dishe said:
.....
And @pistacios, is it possible that you were having a kernel do the same thing since it was just reset and it just so happened to be that when it calibrated itself you thought you had fixed it by cleaning out the USB port?
....,
Click to expand...
Click to collapse
Phone was up and running for 2 weeks, so it wasn't due to fresh reset.
GSAM battery monitor showed kennel wakelock, something about USB OTG in the top of the list, so I figured the port was my first check for a problem, and it was. It wasn't obvious that there was dirt or foreign matter in there, because it looked clean. But sure enough, after the light brushing with 94% alcohol, the problem disappeared.
I'm not saying this is definitely your problem, just throwing it out there.