Battery level display bug? - Nexus 4 Q&A, Help & Troubleshooting

A quick update on a weird bug I encountered in the N4 yesterday. I was outside and got home with my battery at around 50%. I plugged the phone in and look away for a couple of minutes and when I looked back at the phone and the battery was at 100%(!).
I knew this couldn't be right so I checked the battery graph and it showed a steep jump from 50 to 100 in a matter of minutes. I did a phone restart and the battery was back to the correct level and went back to charging normally. Unfortunately I forgot to screenshot the battery graph and after the reset the graph was reset as well.
Could this bug be one of the reasons why certain users are reporting very bad battery lives on the N4? I can imagine that if I had not been paying attention with the charging and just took the phone out to use later, the battery would have seemed to drop very quickly. How commonly could it happen even; has anyone else seen it?

This happened to me last night. I plugged it in to charge and it said the battery was at 100
Sent from my Nexus 4 using Tapatalk 2

This happened to me only once. I jumped from 1% to 100% in a minute I was like no way this thing charges that fast lol
Sent from my Nexus 4 using xda app-developers app

Does seem like it is a common problem then. Better keep an eye out on the battery when charging it.
Sent from my Nexus 4 using Tapatalk 2

Add me to the list, a reboot after I observed the nano second charge to full capacity didn't even make it display properly. I didn't try a hard reboot however.
Not selling my GN just yet.

Related

Battery suddenly drained completely

Before I left the house to go to work, my 10.1 Tab (Google I/O Limited Edition, rooted with 3.1) was at around 80%. I get home 9 hours later and the battery is completely drained. I plugged it in to the charger and turned it back on to see the battery at 1%. That just doesn't seem right to me. I can usually go about 2 days without putting it on the charger.
I've attached an image of the Battery Use graph, you can see it just drops like a cliff for no apparent reason. Has this happened to anybody else? Also, I just noticed that the time it was off (approximately 9 hours) is missing from the graph, so it only shows just under 5 hours.
I had the same issue last night. It had ~40% battery left when I went to sleep last night and this morning it wouldn't turn on, so I plugged in the charger and found the battery drained completely.
Interesting that it happened for you the same night. For me, it seemed to have happened around 5-6pm Pacific time on June 23. I don't know the exact time because I didn't have it with me at the time.
Happened the same to me a couple of weeks ago.
Battery was at 40% and overnight went to 0% and the tablet turned off.
Very weird
Came home to find mine with the screen on but completely black so you could BARELY tell it was on. Had to reboot as it wouldn't respond. When it did I only had 20% charge. I had unplugged it about 5 hrs earlier and left it with about 95% charge. Only happened once though so I haven't worried too much, maybe a similar issue though
Sent from my PC36100 using XDA Premium App
If I had to hazard a guess.. it would probably have been a runaway process in the background somewhere that totally drained the battery. If it was the battery itself losing a charge like that, I would be worried.... When batteries discharge like that for no reason, they can actually explode... (it is rare, but possible..not trying to cause a panic).
jvanbrecht said:
If I had to hazard a guess.. it would probably have been a runaway process in the background somewhere that totally drained the battery. If it was the battery itself losing a charge like that, I would be worried.... When batteries discharge like that for no reason, they can actually explode... (it is rare, but possible..not trying to cause a panic).
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Click to collapse
Wouldn't a runaway process drain the battery slowly over time? This seems to have happened instantly.
I really hope i dont find mine doing this... If I watched a laptop do it I would say the battery was shot. Now that its been charged does it hold a charge just as good as it was prior?
Im jealous you got the google I/O tab, was trying to get one on ebay but to hell with spending all that money for an army of androids you wil never see in a case. I heard they were giving them away for free @ the conference...
Happens tome as well
COUPLE of days ago sentries sleep and woke up to a dead tab
Before I went to bed I had at least 50 perent charge
well , twice in 5days usage .... there is a problem ..... weird
Sent from my SHW-M110S using XDA App
mine no response in wall charging ..so worried that i am pondering your words ...'when it did '
were u trying to. say the tab was not being able to boot in quite some time ?
dsEVOlve said:
Had to reboot as it wouldn't respond. When it did I only had 20% charge.
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Click to collapse
Sent from my SHW-M110S using XDA App
I have had my tab 3 days unrooted. I left it last night at 85% and came home several hours later with the battery totally drained.
Will wait and see. Mine boot, battery 44%, not sure a wall charge in 30 some minutes can charge this much. Battery usage found no clues, no sign of sudden drop......
Yep just happened to me Also. This is a real problem.
first to make sure these power saving settigs are alright ,especially gps which will be turned on by so many location iasking apps.
i originally thought it happened twice on me . now i got to. say the first time my gps is on ,second time , the 10.1 looks no response /dead , but press power burton longer, it will be back in desktop without boot,kind of like hibernation on pc ......maybe after a quite long time no activity, 10.1 manage to hibernate itself .....just guessing
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i just had this happen to my 7" gt. never happened before.
Maps, for some reason, has been quite active even though I haven't used it in a while. I am not logged in to Latitude or anything so I don't know what gives. Also, CNN and USA Today apps seem to consistently get active on 1-5 hour intervals even though I disabled Notifications, etc. Anyone knows the reasoning?!
Last night I was browsing the web at about 30% battery, when my tab just clicked off out of nowhere. I wasn't able to turn it back on until I'd plugged it in. Once I got it back on it showed 1% battery.
Very weird...
battery issue
So last night im surfing the web battery is about 65% suddenly the remove charger battery full message pops up and the indicator says i have %100 full? I hadnt charged it in 4 hours.
jvanbrecht said:
When batteries discharge like that for no reason, they can actually explode... (it is rare, but possible..not trying to cause a panic).
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Click to collapse
Maybe if there's dead short and the pack isn't fused. Otherwise I call BS.

Battery charged itself !!

I checked my battery monitor widget today am noticed something very strange. It showed me 40% charged when I was sure it was only 35% charged before I went bed! WTF did it charge itself? As you can see from the screenshots the phone was not on charge and was awake for most of the night which has never happened before. I have not installed any new apps in the last few days I have never seen this before on any of my android phones over the years. After 1 month of using the note this is the first glitch i've noticed (if it is a glitch). I am on stock LA4.
Anyone have any ideas as to why this happened?
I'm not complaining ( wish it happened every night!) just curious.
I have noticed the same strange thing with ICS.
did you try pinching your arm?
/Jeriz
It is probably/maybe your battery stats that was not exactly "right" and might "recalibrate" your battery stats to the true value.
The simplest answer is always the true one: It is having trouble reading your battery right. Happens with mine too sometimes.
LOL I had the same thing happened to me.
First day with my note. And so far I am loving it.(despite colour rendering issues , and a very lagging stock keyboard)
Sent from my GT-N7000 using xda premium
Maybe the phones are evolving and learning to use the sensor on the Front to charge itself lol
Sent from my Galaxy Note
This has happened to me several times already since the Galaxy S days.. sometimes after a reboot the battery looses 50% and slowly charges back up its quite funny and strange, never happened to my note though.
What do you think happens if some of the services is not needed anymore and stopes relaying,the battery % estimation will go up.
georgios73 said:
I checked my battery monitor widget today am noticed something very strange. It showed me 40% charged when I was sure it was only 35% charged before I went bed! WTF did it charge itself? As you can see from the screenshots the phone was not on charge and was awake for most of the night which has never happened before. I have not installed any new apps in the last few days I have never seen this before on any of my android phones over the years. After 1 month of using the note this is the first glitch i've noticed (if it is a glitch). I am on stock LA4.
Anyone have any ideas as to why this happened?
I'm not complaining ( wish it happened every night!) just curious.
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Click to collapse
Mine charged itself too.
Went from 30% to 50% when I was out.
I thought it has some solar panel hidden beneath.
hagba said:
What do you think happens if some of the services is not needed anymore and stopes relaying,the battery % estimation will go up.
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Click to collapse
Wtf are you talking about? That's not any kind of estimate of lifetime, that's a report on amount of energy left. And in this case, specifically, a bug in it's reading.
Livewings said:
Mine charged itself too.
Went from 30% to 50% when I was out.
I thought it has some solar panel hidden beneath.
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Click to collapse
That one a good idea. Smartphone company should consider to put it in every phone in future..lol
Sent from my GT-N7000 using XDA App
When I saw this thread, I immediately opened my battery stats only to see this:
lulz
Viamonte said:
Wtf are you talking about? That's not any kind of estimate of lifetime, that's a report on amount of energy left. And in this case, specifically, a bug in it's reading.
Click to expand...
Click to collapse
You need to review your facts make a bit more research, the report is based on the fact that how many apps and services are you using,say if the wifi is on, it will show you certain %, however if you turn it off will report you that it has increased, depending on the running apps and services how much battery is left, my laptop does it all the time,unless you are living in pre Smart Battery Meter era.
I have to agree that if the % relies on the voltage (as I am sure it must do to some extent, but I am only guessing), stopping heavy services will allow the voltage to increase and the app may see that as a gain.
Alternatively we have discovered Samsung's secret OTA charging method! This explains why some phones have terrible battery life, they are being sucked dry by nearby 'Vampire Notes'!
Now, if we could just work out how we could charge all Notes by sucking iPhones dry ....
turshija said:
When I saw this thread, I immediately opened my battery stats only to see this:
lulz
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Click to collapse
Mega wtf. :O
Sent from my GT-N7000 using xda premium
Battery is trolling
The Galaxy Note battery is a three terminals battery. So I think that the % state of charge of this battery is directly calculated from its output voltage.
The voltage decrease as the charge decrease, so it is possible to evaluate the residual charge in the battery.This is not a very precise method but it is quite simple to implement.
After a high current drain there is what is called a ''voltage recovery'', the battery voltage increase slowly a little bit as the current is stopped. So you may think that the battery get back energy, but unfortunately it is only an artifact.
Yesterday I showed you all how my battery indicated that it had charged itself.
So guess what folks today when I checked the complete opposite happened!!
Again as you can see it went from 48% just before I went to sleep only to wake up to a dead phone (switched off). Upon rebooting it showed only 9% !!
Now I can cope with it going up but going down is not good.
Hope its not a hardware problem and just a faulty battery.
lets see what happens tomorrow maybe it will explode!
I'm an EE (election engineering) student. Michel_7 is right. Lithium ion batteries experience a voltage sag during high current draws. Afterwards there is some rebound, both as the battery cools if over temp, and with a period of lower activity. This is in part due to the fact that batteries have internal resistance, and as they supply power, they also dissipate some internally. This is of squared proportion to the current drawn. IE current^2 * resistance. Battery resistance constant, so the more power the phone uses, the more the battery does. This is what heats up the battery.
Sent from my GT-N7000 using xda premium

Who has not let there battery go completely flat?

Also how long have u had the device for?
I have not let my battery die to the point where tablet shuts down.
Had it since 16th of july.
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I haven't. I plug it in when it gets around 25-30%.
Have it for a week now.
Sent from my Nexus 7 using xda app-developers app
I did the first day before I charged it.
Sent from my Galaxy Nexus using xda premium
I don't think that I've let mine go below 40%
Completely dead, never. but I have gotten it down under 14%. At that point, I just plugged it in until it was back to 100%.
I have drained it completely maybe 3 times. Once playing dead trigger. I had the N7 plugged into my laptop but it was draining faster than the laptop was charging. Drained it a second time watching movies on a trip. I have drained it completely one or two other times but those are the 2 that come to mind.
drained it the first day and charging when it's around 10% now. nice battery life.
Lowest for me has been around 5%, although I will be going on a trip soon - I hope the powerbrick I have will help it survive!
Nope. Had it down to about 30% after 3 days of use. Was about to complain about battery life, then remembered that it had already had 3 days of use
I don't think mines been lower than 15%, I usually charge it every evening so most of the time it's around 40%-50% left.
I have let it shut down with low battery about a dozen times already
What are your opinions on this? Is doing it bad or good for the battery??
Thanks
I don't let it get that low, and with these batteries, there is no "memory" to worry about when charging... that has not been an issue since Ni-Cad batteries, which have never been used in tablets, and have not been used in phones for like 15 years...

Crazy battery reading

My battery was at 9%. I plugged it in, rebooted to recovery and it read 70%. I thought it was just a misread but when I rebooted it was still at 70%. Has anyone seen this before?
I'm running HB 0927, fast charge is off.
sent from the depths of helly bean
Mine acts that way, but usually just the opposite. Then over time it slowly goes up.
yeah im having a similar problem my phone battery will be at 88% then it will me at 60 in under 20 minutes which is very unusual
blizzardproof said:
yeah im having a similar problem my phone battery will be at 88% then it will me at 60 in under 20 minutes which is very unusual
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Click to collapse
I've noticed that while in use the batt percent will drop a lot but then rise a few percent when you turn screen off.
sent from the depths of helly bean
Mine has done the opposite where it read 70 and dropped to 3% when I got into recovery. What's also odd about mine is that every time it says Charged, when I unplug it, it's never higher than 96%. But if I talk on the phone while it's plugged in, it will go as high as 99%.
That used to happen to me. I just plugged my phone in when it was dead, then I rebooted and I had 70%. Its actually very convenient. When I have to go somewhere, I just plug it in for a minute and my battery is all good to go.
Sent from my SAMSUNG-SGH-T989 using xda premium
Lol it doesn't work that way, the phone might not read the battery percentage correctly, doesn't mean it can fully charge the battery in a few minutes. After you flash a rom or factory reset, it might take a bit of using the phone to get a precise battery reading.
Although some rom have the feature to enable fast charge, but it only improve charging by a bit.
Also its okay to not charge lithium ion batteries to 100% all the time, its actually better for the life of the battery to only charge up to high 90s, some roms have the feature to limit the charging percentage.
It's because now-a-days people don't know too much about the incorrect battery stats and how to fix them.
I've had the same problems, but it's quite weird, it goes up sometimes and down most of the time.
Charge to 100% - or as high as your phone gets - then wipe battery stats. Reboot a few times and charge again to 100% and then do it again.
There's a much better method laying around here, but i'm just too lazy to search right now.
Mine,does that also. I pull the battery out and it recorrects it
Sent from my SGH-T959 using xda premium
Charging it solves the prob, but rebooting without just screws it up, especially when I had a camping retreat I couldnt call anyone causr of incorrect stats.
Sent from my SGH-T999 using xda app-developers app

battery draining in seconds

Good evening people at xda,
From the past few days i am facing an issue in which my battery drains instantly like if i unplug my phone at 25% within 1 minute its at 17% and within 5 minutes it is zero and phone shutsdown. Then i remove my battery and put it back and the battery is again 18% and then again the same thing happens.
*I had made sure that no app is causing this immense drain
*my phone is not rooted
*Running lollipop
*N910G
Any help would be strongly appreciated!
New battery. Mine was doing the same thing. Got a whole new phone when I replaced the battery.
Sent from my SM-N910P using Tapatalk
Did they replaced in warrantly period for free or not?
pilotmills said:
new battery. Mine was doing the same thing. Got a whole new phone when i replaced the battery.
Sent from my sm-n910p using tapatalk
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Didn't bother with the hassle. It was at the end of the warranty period and the batteries are so cheap these days. Got a two pack of Anker for about $40 I believe. Great company for chargers/battery packs/batteries.
Sent from my SM-N910P using Tapatalk
Same here over here. I have an N910C and I get sudden battery drains. The battery starts jumping down from X% to Y% in seconds until phone shuts down. So, I connect my charger and suddely thr battery is 15% again. Sometimes I see that battery is 20% and I connect my charger but I doesn't start charging my phone, it is as if I started a battery countdown and instead of charging my battery starts discharging faster than the speed of sound. Other days I have 40% and suddenly 0%; phone shuts down. This is insane. Let me know if battery replacement solves the problem.
Also getting poor battery life and fast drain in seconds. Had 13% of battery yesterday, started Skype call and phone shuted down. Last night I had 27% and turned on the ultra power saving mode. Had 25% in the morning, turned the saving mode off and battery went straight to 7% and phone turned off in half minute. Should get new battery tomorrow, will update then.
Sent from my SM-N910F using XDA Free mobile app
Same as what I experienced last week. And I noticed the left side of my screen was lifting.... then I checked the battery and saw it bloated... I threw it away and used my spare....
well i got it done by the company under warranty. got a part named "msb" replaced!

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