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Battery life is plunging from 80% to zero

Hey all,
About three weeks ago I had a strange problem. I noticed that in two straight charge cycles, my battery life plummeted from about 80% to zero in just a few hours. I'm not sure what the issue was. I hadn't changed settings, installed new apps, etc. My first screenshot shows an example of what happened. 4G and data were off during the entire time.
Since then, things have been okay. I typically get 3 days standby with 4G on and light use, or 4 days with 4G off. That's mostly standby with maybe an hour or so of talking and minimal use.
After those strange battery plummets, I installed and used GSam Battery Monitor to get more details about what processes were running on my phone in case I noticed the sharp drop happening again. Everything had been fine for over two weeks, with me getting expected battery life before this issue and not experiencing any odd, sudden drops (maybe 5 or 6 charge cycles). This lends me to conclude that my battery's charge capacity is okay, and calibration also shouldn't be an issue.
However, the problem arose once again a couple days ago. Went from 75% to nothing in just a few hours. 4G was off during that time. The third and fourth screenshots show the same issue. Charged my phone, and this morning the same thing happened yet again. At about 90% the plummet began, and within an hour or so I was at 75%. At this point I took screenshots of Android's battery status, and I also did the same for GSam to show what apps and processes were running. The phone's temperature seemed fine.
The GSam screenshots taken when the phone was at 75% and dropping are in the next post, since I'm limited to four images in this one. I have no idea what's causing this massive, sudden battery drain. The only thing I can think of is that I've done Verizon's OTA updates, but otherwise pretty much all my settings, apps, and usage are the same. Plus, for two weeks I had normal battery behavior, so I'm completely baffled.
I also know that cell standby is incorrectly reported in the GS3 battery screen, and I'm getting a good signal where I live so that shouldn't be a problem. I forgot to get screen time for the first case (first two images), but it shouldn't be more than 10-15 min there since most of the charge was lost due to the freak plummet.
If anyone may have an idea of what's going on, or if there are some tools/tests I may use to figure this out, I'd really appreciate it. I turned off my phone after taking the screenshots at 75%, so if I need to turn it on and check something for you I can probably do that. Thanks a lot.

FYI, here are GSam screenshots from when the battery was in the process of plummeting this morning.

i think you built in battery status settings are off. i barely get 12 hrs with medium use, so what i think it happens is that the battery monitor is not showing the proper discharge, and then all of a sudden it catches up to the discharge rate.
are you on stock rom, rooted, unlocked bootloader?

wizzardeel said:
i think you built in battery status settings are off. i barely get 12 hrs with medium use, so what i think it happens is that the battery monitor is not showing the proper discharge, and then all of a sudden it catches up to the discharge rate.
are you on stock rom, rooted, unlocked bootloader?
Click to expand...
Click to collapse
I am stock rom. No rooting, no unlocking.
These plunges are definitely an anomaly. Truly, with me barely using the phone and turning off mobile data, I get a few days of standby. I've had the phone since July, and the aberration in battery behavior has been the steep plunges I've shown.
In between these instance of steep plunges, I've had normal use. I really don't think it's an issue of calibration. Please believe me when I say that my normal, light use during the past four months gets me anywhere from 3-5 days with me barely using the phone. When I say barely using it, I mean not even touching it for an entire day if nobody calls me. But now, a sudden plunge in battery life is happening at 80% with no apparent reason.
I think it might be some kind of software or hardware glitch, but it's impossible for this to be normal given the battery life I typically get. Just looking at that steep drop, it's crazy and just happens out of nowhere.
But please trust me when I say that these sudden plunges that have happened a total of 4 or 5 times, causing the battery to drain completely in a few hours when I'm not touching it, are quite a drastic aberration from the normal standby life I get. Something is definitely wrong here, I just don't know what.
And one more thing to add is that after this sudden plunge and rapid drain, charging the battery still takes the normal time it does when I'm not having this issue. That is, about 2.5-3 hours to reach a full charge (and I charge with the phone 'off'). The battery is being completely drained. But this happened twice, then didn't happen for maybe 5-6 charge cycles, then happened again twice.
Before the first instance, I remember an OTA Verizon update around 10/5. My phone was okay for 2-3 charge cycles after that. Then two rapid drains. Then 5-6 normal cycles. Then two more rapid drains. There was a second Verizon OTA update somewhere in there but I can't remember.

and you said it only started once you did the OTA update from verizon right? well you could either try to go back to the stock verizon rom pre-update and see what happens there, or contact verizon and let them know what happens with the new OTA update. they could replace your phone, or it could be a bug of the new OTA update. i am on stock rom and rooted and deleted the apk that kept on trying to push the update. just unlocked by bootloader and so far my battery life has improved compared to previous locked bootloader.

i would take it to a verizon store and show them. They might give you a new battery.

I may have to do that. I'm just not really sure what the issue is.
- The battery can still hold a full charge.
- Based on running services, nothing is causing high CPU usage.
- The sudden plummet almost seems kind of random.
- Since there have been normal charge cycles, it's not an issue of calibration.
I'm not sure if this is a hardware issue or software issue. I'm trying to wrap my brain around what could cause the battery to drain so suddenly and sharply. Could the charge somehow be "leaking"? But in that case I'd expect it to happen all the time. If there's an underlying software issue, is there any other tool I might be able to use to figure it out?

Does the phone get hot?
Sent from my SCH-I535 using xda app-developers app

jhoutz said:
Does the phone get hot?
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
Not from what I can tell. Note that the first couple plummet drains were overnight.
But today I caught it before noon. The phone wasn't hot, and the GSam screenshots show no CPU stress.

Maybe you can do a factory reset and se if that helps. They will probably do one if you bring it to verizon anyways. It sure sound like a hardware problem. You'd think if the processors are working that hard that the phone would get hot, I know mine gets pretty hot sometimes under heavy use.
Sent from my SCH-I535 using xda app-developers app

Thing is, all indications show the CPU isn't working hard, and the phone wasn't hot.
I'm stumped.
This is a noobish question, but I presume the only way to go back to stock is to factory reset? One thing I might wait for is the Jelly Bean update, presuming this random drain holds off until then.
But yea, I dread going into VZW because they're just going to try to pass this off onto me doing something wrong, or me not knowing how to calibrate the battery, etc. The information I've provided in my OP and in the screenshots would fly over their heads. Maybe I can just do an online chat and tell VZ to send me another battery?
The only other thing I can think of is that sometime before these plummets happened, I went online to MyVerizon and turned off the Backup Assistant for movies/music/etc. so I wouldn't get all those notifications. I don't think this could be the issue, since the plummet happens when data is off. Plus, GSam would show that Backup Assistant is hogging the CPU or forcing a signal.
I doubt swapping batteries will fix it, though. I'm thinking my internal hardware might have a serious problem.

inm8num2 said:
Thing is, all indications show the CPU isn't working hard, and the phone wasn't hot.
I'm stumped.
This is a noobish question, but I presume the only way to go back to stock is to factory reset? One thing I might wait for is the Jelly Bean update, presuming this random drain holds off until then.
But yea, I dread going into VZW because they're just going to try to pass this off onto me doing something wrong, or me not knowing how to calibrate the battery, etc. The information I've provided in my OP and in the screenshots would fly over their heads. Maybe I can just do an online chat and tell VZ to send me another battery?
The only other thing I can think of is that sometime before these plummets happened, I went online to MyVerizon and turned off the Backup Assistant for movies/music/etc. so I wouldn't get all those notifications. I don't think this could be the issue, since the plummet happens when data is off. Plus, GSam would show that Backup Assistant is hogging the CPU or forcing a signal.
I doubt swapping batteries will fix it, though. I'm thinking my internal hardware might have a serious problem.
Click to expand...
Click to collapse
Before the update, was everything normal?
Is the update with the HE base/baseband?
It probably isn't a hardware problem, just a bad base.
I've noticed after updating my GS3 to the HE base and the battery life was just horrid.
It's said that the new HE baseband uses up more battery also

emckai said:
Before the update, was everything normal?
Is the update with the HE base/baseband?
It probably isn't a hardware problem, just a bad base.
I've noticed after updating my GS3 to the HE base and the battery life was just horrid.
It's said that the new HE baseband uses up more battery also
Click to expand...
Click to collapse
Sorry, I don't know what you mean by "HE" base/baseband.
But yea, this problem didn't come up until after an OTA update.

Check your baseband version under Settings -> About and paste it here
Sent from my rooted Verizon Samsung Galaxy SIII

It's I535VRLHE
Kernel version: 3.0.8-1092717
Build number IMM76D.I535VRALHE
I turned on the phone and within 10 min or so the battery life went down by 2-3% without me doing anything. As a test I've put it into Airplane mode, and it's decreased by about 2% in 45 min.
Now I'm wondering if I have a faulty antenna or something.

Yup ive had it drain 90% overnight many times for no reason. Called verizon and my new battery should be here today.

1+ day on battery and only 11 minutes of screen time?!?

inm8num2 said:
It's I535VRLHE
Kernel version: 3.0.8-1092717
Build number IMM76D.I535VRALHE
I turned on the phone and within 10 min or so the battery life went down by 2-3% without me doing anything. As a test I've put it into Airplane mode, and it's decreased by about 2% in 45 min.
Now I'm wondering if I have a faulty antenna or something.
Click to expand...
Click to collapse
HE is the baseband version and the build number. For example I have: Android Version: 4.0.4
Baseband: I535VRLG7
Build: IM76D.I535VRALG7
which is the version before the update.
Like everybody else said, call Verizon or go to a store and let them know about the battery issues and they should send you a new one. Or even call Samsung and tell them you bought an S3 through Verizon and you are having battery hardware issues.

sonser said:
1+ day on battery and only 11 minutes of screen time?!?
Click to expand...
Click to collapse
Well, no calls made or received during that time. No data being used.
So, wasn't really using the phone during that time...

[Q] phone shuts down after battery goes from 40-50% to 0%

Today I had my AT&T One X at around 40% charge when I went to sleep. After getting up the phone had shut itself down and when I try to turn it on using the power switch nothing happens. I charged it then it starts charging from 0%. I am on stock 4.04 rom and have rooted the phone. This is the third time in a month that this has happened. I am attaching the battery curve that I got after today's incident. Please Help! Thank you very much for any help in advance.

bosskaunhai said:
Today I had my AT&T One X at around 40% charge when I went to sleep. After getting up the phone had shut itself down and when I try to turn it on using the power switch nothing happens. I charged it then it starts charging from 0%. I am on stock 4.04 rom and have rooted the phone. This is the third time in a month that this has happened. I am attaching the battery curve that I got after today's incident. Please Help! Thank you very much for any help in advance.
Click to expand...
Click to collapse
Sounds like bad wakelocks, install Better Battery Stats to find out what is draining your battery.

Crappyvate said:
Sounds like bad wakelocks, install Better Battery Stats to find out what is draining your battery.
Click to expand...
Click to collapse
I have installed betterbatterystats and will update with results next time it happens..

I too am having this problem. Though it started happening after my phone drained and wouldn't restart after charging (boot loop). After I fixed that, it's been dropping dead.
I'm on a stock rom with ElementalX 3.0 kernel. Was v2.0 when it initially started.
Any luck finding information? I still get about the same use out of it (sometimes). I'm thinking that maybe the battery's level is getting reported incorrectly?

This is a known bug, whatever the hell is causing it. Just about everyone has had this happen at least once.

Its Reh said:
I too am having this problem. Though it started happening after my phone drained and wouldn't restart after charging (boot loop). After I fixed that, it's been dropping dead.
I'm on a stock rom with ElementalX 3.0 kernel. Was v2.0 when it initially started.
Any luck finding information? I still get about the same use out of it (sometimes). I'm thinking that maybe the battery's level is getting reported incorrectly?
Click to expand...
Click to collapse
How often are you having this problem. I have had this happen about 3 times in the last three weeks or so. Since my post last week, I haven't had it happen to me yet. I now have the betterbatterystats app installed and will update with results the next time I have battery drain.

bosskaunhai said:
How often are you having this problem. I have had this happen about 3 times in the last three weeks or so. Since my post last week, I haven't had it happen to me yet. I now have the betterbatterystats app installed and will update with results the next time I have battery drain.
Click to expand...
Click to collapse
It happens quite often. Happened today, then three days before that. I really don't have much on this phone either. After the initial bootloop I did a factory reset and didn't really add much.

This happened to me once on stock rom and kernel. I think it has something to do with the network trying repeatedly to connect and draining the battery. But the phone is asleep and not updating the battery percentage. When the phone finally awakes, it instantly updates the batteryfrom whatever it was before to 0. It seems to happen to people in the early morning.

There is a pretty sizable thread on this already.
http://forum.xda-developers.com/showthread.php?t=1881439
I have contacted AT&T and HTC. Neither knows whats up. Went to CM 10 though and haven't seen the issue. Although, the last 2 weeks with CR Dev I didn't see the issue either. It used to happen every night.

Butters619 said:
There is a pretty sizable thread on this already.
http://forum.xda-developers.com/showthread.php?t=1881439
I have contacted AT&T and HTC. Neither knows whats up. Went to CM 10 though and haven't seen the issue. Although, the last 2 weeks with CR Dev I didn't see the issue either. It used to happen every night.
Click to expand...
Click to collapse
Thought I remembered seeing a thread but couldn't find it via search.
I wonder if it's a sense based issue if you haven't seen it with CM 10. Though I didn't have any issues while using the stock kernel. -edit just read flar2's post about using stock and seeing the issue
Most likely something is draining while the phone is asleep and the battery doesn't update. You can see in my history details that when the phone wakes it jumps. Especially the ending death jump lol

I know if I have fast boot enabled and then it off, it'll drain around 10%. It only loses around 3 or 4 if the phone is shut down. I've never left it on overnight, but then again I am an avid task-killer
Sent from my One X using Tapatalk 2

[Q] Dock Draining battery

Both running stock or CleanROM I have the issue that when I leave the tablet undocked my battery will last days or weeks with the screen off. When I connect the dock and turn off the screen the dock battery will drain to 0% within a couple days and the tablet battery level would be lower than if I had left it undocked.
I've installed better battery stats and deep sleep batter saver and the device is verified in deep sleep 90% of the time.
Any suggestions?

Think that is how it designed to work. Dock will keep trying to top up the tab when it drops below 70% and then when the dock battery runs out it requires extra juice from the tab to keep it alive.

sbdags said:
Think that is how it designed to work. Dock will keep trying to top up the tab when it drops below 70% and then when the dock battery runs out it requires extra juice from the tab to keep it alive.
Click to expand...
Click to collapse
I think my question may have not been clear. One should assume that the addition of a second battery should increase the overall runtime of the device not decrease it. Instead of getting the extra hours of battery life I am getting less battery life with the dock attached.

Same problem
I have the exact same problem. Ive got all the right apps and settings suggested from XDA and still my battery drains when doc is connected.

madhits45 said:
I have the exact same problem. Ive got all the right apps and settings suggested from XDA and still my battery drains when doc is connected.
Click to expand...
Click to collapse
Same problem since the 4.2 update...

WoozyBE said:
Same problem since the 4.2 update...
Click to expand...
Click to collapse
Ditto, same here.

I'm starting to think this is a common problem, and not just some random one that I was having...
So I installed better battery stats and it is indeed the dock that's draining both it's own battery as well as the infinity's battery. I think I had about 4 hours of asusdec_wake lock coming from the dock when I let it go to sleep, but the strange thing is it only appears to happen after about half an hour of sleep before it kicks in for me (I should point out btw that I'm using a tf201 dock and running cromi-x 4.4 with _that's kernel). After removing the dock from my infinity, I no longer got the battery drain from my tab, but when my tab was docked, the keyboard seemed to drain like crazy along with the infinity, but only after being asleep for about half an hour to an hour. I suppose this is just a 4.2 bug that ASUS might be able to release an update on, or sbdags, as it seems he's done a better job with bug fixes than ASUS has. :laugh:

Paulitics said:
I'm starting to think this is a common problem, and not just some random one that I was having...
So I installed better battery stats and it is indeed the dock that's draining both it's own battery as well as the infinity's battery. I think I had about 4 hours of asusdec_wake lock coming from the dock when I let it go to sleep, but the strange thing is it only appears to happen after about half an hour of sleep before it kicks in for me (I should point out btw that I'm using a tf201 dock and running cromi-x 4.4 with _that's kernel). After removing the dock from my infinity, I no longer got the battery drain from my tab, but when my tab was docked, the keyboard seemed to drain like crazy along with the infinity, but only after being asleep for about half an hour to an hour. I suppose this is just a 4.2 bug that ASUS might be able to release an update on, or sbdags, as it seems he's done a better job with bug fixes than ASUS has. :laugh:
Click to expand...
Click to collapse
Is sbdags a custom rom? I'm assuming so. Also your use of the tf200 dock should make no difference. Its been proven besides a firmware change and a slight color change the 2 docs are pretty much the same. I also believe this maybe a 4.2 issue however I have seen this before the latest update with my doc. It does appear to kick in after about 30 mins to an hour for me also. I am trying out a new app that I hope will help called DS battery saver. Ive tried others before to no avail but I figured why not give this one a try. I keep my infinity on the doc all the time so I hope they can fix this issue...

madhits45 said:
Is sbdags a custom rom? I'm assuming so. Also your use of the tf200 dock should make no difference. Its been proven besides a firmware change and a slight color change the 2 docs are pretty much the same. I also believe this maybe a 4.2 issue however I have seen this before the latest update with my doc. It does appear to kick in after about 30 mins to an hour for me also. I am trying out a new app that I hope will help called DS battery saver. Ive tried others before to no avail but I figured why not give this one a try. I keep my infinity on the doc all the time so I hope they can fix this issue...
Click to expand...
Click to collapse
sbdags is the creator of the awesome custom rom, clean rom inheritance xenogenisis, he's also the second poster in this thread. I'm currently running his 4.4 rom and it's incredible! (Thank you @sbdags btw for the amazing rom, you'll get a kind donation once I can get this internship thing figured out :highfive I kind of figured that having a 201 dock wouldn't make a difference, but I just thought I should mention it. As for the draining of the battery, I think we can just assume it's a 4.2.1 bug that can hopefully be patched by ASUS or by one of the awesome developers. I've also tried DS battery saver, and I think it told me the culprit was screen on, but after installing better battery stats, I got a recurring wake lock from the asusdec_lock. Oh well, it's not the worst thing ever right now to just undock the tablet, or remember to shut it off while docked.

Paulitics said:
sbdags is the creator of the awesome custom rom, clean rom inheritance xenogenisis, he's also the second poster in this thread. I'm currently running his 4.4 rom and it's incredible! (Thank you @sbdags btw for the amazing rom, you'll get a kind donation once I can get this internship thing figured out :highfive I kind of figured that having a 201 dock wouldn't make a difference, but I just thought I should mention it. As for the draining of the battery, I think we can just assume it's a 4.2.1 bug that can hopefully be patched by ASUS or by one of the awesome developers. I've also tried DS battery saver, and I think it told me the culprit was screen on, but after installing better battery stats, I got a recurring wake lock from the asusdec_lock. Oh well, it's not the worst thing ever right now to just undock the tablet, or remember to shut it off while docked.
Click to expand...
Click to collapse
I'm not so sure i want to try custom roms yet. I hate not knowing if its the rom or my tablet when trouble arises. I wonder what it could be in his rom that makes this issue go away or does it not? Was not sure if you were saying it cleared the problem up or not.
I have better battery stats & its telling me asusdec_wake was on for 11h 50min. Not sure what that is, assuming it woke the tablet up. Sounds similar to yours though. I do know the google services was what always shows in the battery stat app by asus. I hate to undock as it involves removing my whole case which protects both doc & tablet.

madhits45 said:
I'm not so sure i want to try custom roms yet. I hate not knowing if its the rom or my tablet when trouble arises. I wonder what it could be in his rom that makes this issue go away or does it not? Was not sure if you were saying it cleared the problem up or not.
I have better battery stats and so far it has only reported no stats, so not sure what is draining my tablet. I do know the google services was what always shows in the battery stat app by asus. I hate to undock as it involes removing my whole case.
Click to expand...
Click to collapse
Oop, yeah, sorry, I probably should have made that clear that the problem is still present in Clean Rom Xenogenesis 4.4 and most likely with Stock Asus 4.2.1, so flashing a custom Rom won't do anything to solve it to my knowledge, so I wouldn't worry about that. In order for better battery stats to do it's stuff, you need to set it to "since last boot" and then just restart the tablet. At least, that's what I did to make it work. After that, better battery stats will start collecting data about what's waking up your tablet from sleeps, but it's still kind of hard to pinpoint what app is causing the issue.
What we know for sure is that it's something to do with Android 4.2.1 and being connected to the dock while the tablet sleeping is causing it to drain both the batteries of the dock and the tablet, but this doesn't occur when it's disconnected from the dock, and the tablet sleeps just fine. Also not really sure if this is relevant, but when I had my tab sleeping, it went into deep sleep, but after about half an hour of deep sleep, it had that asusdec_wake lock and then it bumped up to I believe 510 mhz for the rest of it's sleeping time. So, maybe it's a stock kernel thing?

Here's what I think is happening.
Asus don't allow deep sleep whilst the device is charging. When using the dock the device thinks is it is charging so doesn't deep sleep. The devices keeps waking, drawing charge from the dock which eventually runs down.

sbdags said:
Here's what I think is happening.
Asus don't allow deep sleep whilst the device is charging. When using the dock the device thinks is it is charging so doesn't deep sleep. The devices keeps waking, drawing charge from the dock which eventually runs down.
Click to expand...
Click to collapse
That could be a reason, I'm just confused as to why ASUS would add this, as I never had this problem in 4.1, but after 4.2 it's happened every time I had my tablet in the dock and let it sleep for long periods of time, and it's not cromi 4.4 as it appears to be the case with stock as well. Also, not only the dock drains, but the tablet drains too, but it's only when docked. When I'm not docked, I go about 1% per hour drain, but when I am docked, I'll go about 10 - 15% drain. Oh Asus, you crazy!

Could this be related to the option to wake-up by pressing a key on the dock, by any chance? I could just be spouting rubbish (which wouldn't be a first), but it seems to me that such a setting would require some kind of wake process.
Do you have it enabled?
I vaguely recall there being a similar issue with a fairly similar-named process a while back. I think it was the wakeup setting back then, but it could also have been Maps and Location Services.
Send From My Samsung Galaxy S3 Using Tapatalk 2

ShadowLea said:
Could this be related to the option to wake-up by pressing a key on the dock, by any chance? I could just be spouting rubbish (which wouldn't be a first), but it seems to me that such a setting would require some kind of wake process.
Do you have it enabled?
I vaguely recall there being a similar issue with a fairly similar-named process a while back. I think it was the wakeup setting back then, but it could also have been Maps and Location Services.
Send From My Samsung Galaxy S3 Using Tapatalk 2
Click to expand...
Click to collapse
I froze maps and turned off all location access and turned off all wireless functions (location, bluetooth, wireless, etc.) from my tab and it still occurs. It's possible that it could be the asus power saving thing for the dock which is the only real thing I have enabled for the dock, but I'm away from my tab at the moment, so I can't exactly test this theory yet.

sbdags said:
Here's what I think is happening.
Asus don't allow deep sleep whilst the device is charging. When using the dock the device thinks is it is charging so doesn't deep sleep. The devices keeps waking, drawing charge from the dock which eventually runs down.
Click to expand...
Click to collapse
Any idea how to fix?

Paulitics said:
... It's possible that it could be the asus power saving thing for the dock which is the only real thing I have enabled for the dock, but I'm away from my tab at the moment, so I can't exactly test this theory yet.
Click to expand...
Click to collapse
Based on my observation mentioned option has no infuence on dock draining problem.

Confirmed Dock Drain
The battery drain is happening to me as well. I couldn't figure out why the stupid thing kept going dead.
Not happy! It's just another problem with this tablet. I wanna like it, but it's one thing after another!
-- ok, venting over --
Anyone find a solution yet? Downgrade the OS?

ryanbadowski said:
The battery drain is happening to me as well. I couldn't figure out why the stupid thing kept going dead.
Not happy! It's just another problem with this tablet. I wanna like it, but it's one thing after another!
-- ok, venting over --
Anyone find a solution yet? Downgrade the OS?
Click to expand...
Click to collapse
I believe asus is releasing a new update for our tab in a couple weeks. Over on the tf300 forum, I heard they got a new update that I'm not entirely sure what it fixed, but it may or may not have fixed the battery issue, I'll have to look into that. So I would wait before jumping the gun and downgrading, but that's just me, it's a free country after all.
But as for now, there is no fix that I'm aware of.
Sent from my HTC EVO LTE using xda app-developers app

No such problems here - yesterday evening 91%+91%, today morning 89%+89%. Stock deodexed 4.2.1 ROM with _that2 kernel and some apps removed.

Nexus 5 sudden crash

Running kitkat, battery recently replaced. all good for a month.
Yesterday the phone suddenly switched off , i switched it on again and the battery had jumped down about 40%.
It crashed again but then remained stable for the rest of the day.
Tonight (at 50% battery remaining) i got a sudden warning "6% battery remaining" and it crashed again, i switched on again and the battery went back to normal , around 40%, stable since.
Any ideas or is the phone on the way out ?

Did you buy an official N5 battery? It looks like a faulty battery...

This is the one i ordered
https://www.replacebase.co.uk/lg-nexus-5-d820-replacement-battery-bl-t9-original-6818/
Phone seems ok today so far, would wiping the cache be worth a try ?
Thanks for the help.

michaelopolis said:
This is the one i ordered
https://www.replacebase.co.uk/lg-nexus-5-d820-replacement-battery-bl-t9-original-6818/
Phone seems ok today so far, would wiping the cache be worth a try ?
Thanks for the help.
Click to expand...
Click to collapse
It can't do any harm but it won't help in this situation.
Try the following:
1. Let the battery go to 5% then charge your device to 100%
2. Disconnect the cable
3. Reconnect it and check if the battery level is at 100%. If not keep charging. If 100% disconnect and reboot. Then reconnect until 100%
These steps worked for some users (even if steps 1 & 2 should be enough IMHO).
Moreover you can try to remove apps or flash the factory images to check if the problem persists. If nothing works then your last attempt is to send it back to ReplaceBase.

thanks for taking the time to reply, will try your suggestions,

Just had another strange battery drain, captured it on this screenshot.
You can see battery just takes a sudden dive and recovers somewhat.
http://dl-1.va.us.xda-developers.co....png?key=ftn99xdXJLEfZ80y35-hWA&ts=1442328244

michaelopolis said:
Just had another strange battery drain, captured it on this screenshot.
You can see battery just takes a sudden dive and recovers somewhat.
http://dl-1.va.us.xda-developers.co....png?key=ftn99xdXJLEfZ80y35-hWA&ts=1442328244
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I have just read a nice thread about massive battery drain. Check this out.
His explanations fit with your battery stats.

Thanks for that, will have a browse, but would it explain my phone suddenly dying at 50% ?

michaelopolis said:
Thanks for that, will have a browse, but would it explain my phone suddenly dying at 50% ?
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I guess. Anyway you should follow the above steps and clean up your device by removing useless apps/features. Finally flashing factory images is sometimes a good thing to start from scratch.

Thanks again
I just tried your first suggestion, charged till 100% then disconnect, it immediately dropped to 99% so i recharged to 100%
Then disconnected and rebooted, weirdly when the phone rebooted it said the battery was now at 19% ,
Back on charge again.

Ugh.... Good luck but I would bet on a faulty battery. You'll probably have to send it back if you can use the warranty.
Did you have the same issue after receiving the new battery? Did you change several things of your setup (kernel, new apps...)?
Going from 100% to 19% can't be explained by the above thread. IMO no apps, no kernel, no software can explain this drop. Some folks say that it can also be caused by the motherboard...

Replacebase have promised to send me out a new battery , they too think its likely a dodgy battery, top customer service so far, hopefully it wont take too long to arrive.
I didnt change anything on my phone, perhaps updated some apps , its stock Kitkat,,, meanwhile Is there any way to check the health of the motherboard ? i don't like the sound of that.

michaelopolis said:
Replacebase have promised to send me out a new battery , they too think its likely a dodgy battery, top customer service so far, hopefully it wont take too long to arrive.
I didnt change anything on my phone, perhaps updated some apps , its stock Kitkat,,, meanwhile Is there any way to check the health of the motherboard ? i don't like the sound of that.
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Without profesionnal tools we can't check this AFAIK. Don't worry about the motherboard. It was only a suggestion reported by a few users. Chances are your problem will be solved after receiving the new battery.

ok thought as much, battery charged up to 100%, rebooted and now at 60%.
Ill put back in the old battery for now and see how it behaves. thanks for you help

Does this battery drain make sense?

https://imgur.com/a/ZaLax
I was at home all day yesterday, I barely used my phone. I unplugged it in the morning around 6:00am, and battery was reported at 100% until about 10:00am. That can't be accurate because I made a couple calls and browsed around a bit.
From 10:00am, it discharged slowly to about 60%, when I went to bed at 9:00pm.
When I woke up at 6:00am this morning, the phone was totally drained and off. This doesn't make sense. Standby drain should be 2 or 3% an hour. not 60% over 9 hours.
Something is up...I'd greatly appreciate if anyone can help me solve this.

The battery on this phone doesn't seem to be calibrated all that well, so it is dropping faster than it appears to be when you unplug with a full charge. It doesn't really stay at 100% for 4 hours, so eventually it will start dropping faster once the phone realizes you are missing more battery than it thought.
With that said, you definitely seem to have had some process that bugged out and was running all night until the battery died. If that keeps happening I'd do a factory reset

redandblack1287 said:
The battery on this phone doesn't seem to be calibrated all that well, so it is dropping faster than it appears to be when you unplug with a full charge. It doesn't really stay at 100% for 4 hours, so eventually it will start dropping faster once the phone realizes you are missing more battery than it thought.
With that said, you definitely seem to have had some process that bugged out and was running all night until the battery died. If that keeps happening I'd do a factory reset
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thanks. I appreciate the answer. Any idea how to find that bugged process? All of the battery stat apps require root to identify this, which doesn't exist at the moment.

jamesey10 said:
thanks. I appreciate the answer. Any idea how to find that bugged process? All of the battery stat apps require root to identify this, which doesn't exist at the moment.
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I don't know how to yet on unrooted 8.0. I don't know if the keyboard is considered a system app, but I lost 20% of my battery yesterday to Gboard so I wonder if that's also your problem. Mine did show up somewhere in the battery stats though so if you didn't see it there that's probably not your issue

Try Better Battery Stats (there's a good xda thread) and gsam (from the play store). If unrooted, you have to set some things with adb to get all functions.

jamesey10 said:
thanks. I appreciate the answer. Any idea how to find that bugged process? All of the battery stat apps require root to identify this, which doesn't exist at the moment.
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There is root now that is definitely some rouge apps and or un calibrated battery hope u get it sorted out

I don't have this phone (yet), but isn't there a way to boot into the stock recovery/bootloader and wipe the battery stats there? or maybe an app that can do it that does NOT require root?