I've had my Nexus for about a month, and no matter what ROM or kernel I use it seems that most of the time my battery only charges to 99% an not the full 100%. It will sometimes charge to 100%, but is rare that it happens. I know how to properly take care of my battery, but I'd like to know of this happens to anyone else and if there's anything I can do to fix it. I'm currently using the stock battery.
Thanks.
Sent from my Galaxy Nexus using xda premium
dustrho said:
I've had my Nexus for about a month, and no matter what ROM or kernel I use it seems that most of the time my battery only charges to 99% an not the full 100%. It will sometimes charge to 100%, but is rare that it happens. I know how to properly take care of my battery, but I'd like to know of this happens to anyone else and if there's anything I can do to fix it. I'm currently using the stock battery.
Thanks.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Android has been like this since at least Gingerbread. It's not new or a problem. Some phone manufacturers make it read 100%, but Nexus devices report what it actually is. You can turn the screen on when it's at 99% and start charging that way if you really need that last 1% .
I've had that happen a few times. Go to /data/system and delete batterystats.bin and then plug in your phone. It should then charge to 100%.
Sent from my toroplus
Redneck Trash said:
I've had that happen a few times. Go to /data/system and delete batterystats.bin and then plug in your phone. It should then charge to 100%.
Sent from my toroplus
Click to expand...
Click to collapse
Agreed, deleting you bat batterystats.bin will allow the phone to charge to 100%. It's pretty common lately, I have had it happen 3 times after the second I gave up. 99% is good enough for me.
mwalt2 said:
Android has been like this since at least Gingerbread. It's not new or a problem. Some phone manufacturers make it read 100%, but Nexus devices report what it actually is. You can turn the screen on when it's at 99% and start charging that way if you really need that last 1% .
Click to expand...
Click to collapse
I dunno, I've been using gnex for 6 months and never had that problem?
As far as I'm aware, most smartphones when continually connected to a charger will charge to 100%, stop charging, allow the phone to discharge to 95%, and then begin charging again. This prevents over-charging, which would potentially damage the battery.
I rarely find my Nexus at 100% when it's on the charger. It's usually at 97-99%.
Redneck Trash said:
I've had that happen a few times. Go to /data/system and delete batterystats.bin and then plug in your phone. It should then charge to 100%.
Sent from my toroplus
Click to expand...
Click to collapse
Enkriptd said:
Agreed, deleting you bat batterystats.bin will allow the phone to charge to 100%. It's pretty common lately, I have had it happen 3 times after the second I gave up. 99% is good enough for me.
Click to expand...
Click to collapse
:facepalm: No, it will not. Batterystats.bin has absolutely zilch, zero, nada, to do with it. I have no idea why people, including some who should know better, continue to perpetuate this bit of misinformation. The only thing deleting batterystats.bin does is erases the list of processes that have used the battery. It has no bearing on the percentage reported.
To the OP- one of the primary reasons that you don't see it often make it to 100% is that lithium-ion batteries are often throttled just short of a complete charge in order to prolong the battery's serviceable life. Additionally, some will slow to a trickle charge when close to fully charged. At this point, the charge and discharge rates will sometimes negate each other.
najaboy said:
:facepalm: No, it will not. Batterystats.bin has absolutely zilch, zero, nada, to do with it. I have no idea why people, including some who should know better, continue to perpetuate this bit of misinformation. The only thing deleting batterystats.bin does is erases the list of processes that have used the battery. It has no bearing on the percentage reported.
To the OP- one of the primary reasons that you don't see it often make it to 100% is that lithium-ion batteries are often throttled just short of a complete charge in order to prolong the battery's serviceable life. Additionally, some will slow to a trickle charge when close to fully charged. At this point, the charge and discharge rates will sometimes negate each other.
Click to expand...
Click to collapse
Deleting the file got my phone to report 100%. I know it shouldn't matter. Although I never encountered this issue on ICS. Only started on JB.
Sent from my toroplus
Redneck Trash said:
Deleting the file got my phone to report 100%. I know it shouldn't matter. Although I never encountered this issue on ICS. Only started on JB.
Sent from my toroplus
Click to expand...
Click to collapse
Actually, it didn't. You're equating correlation with causation. What would have gotten your phone to report 100% is some other variable that actually has bearing on battery charge.
Dianne HackbornJan 12, 2012 - Public
Today's myth debunking:
"The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory."
No, it does not.
This file is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings.
That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your more device more fantastic and wonderful... well, unless you have some deep hatred for seeing anything shown in the battery usage UI. And anyway, it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point), so this would be a much easier way to make it go away.
Click to expand...
Click to collapse
najaboy said:
Actually, it didn't. You're equating correlation with causation...
Click to expand...
Click to collapse
Source: https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
And I like this reply to a comment even better:
+semeon korsunsky You say "ever since my first android(g1 oct 2008) and every android device ive owned since, the batterystats.bin file has always lost accuracy with a short amount of time," but in fact there was NO batterystats.bin file in early Android. I think the first release this ever appeared in was Cupcake, and that was just some early experimental work I was doing to try to quantify application behavior by sticking in instrumentation of interesting potential power-related things they were doing.
I will say that I don't know for sure what all of the various devices are doing... however, I know exactly what the battery stats code on the G1, Nexus One, and Nexus S does. I wrote it. And I can assure you there is nothing it does that has any impact on battery level reporting or battery draining (aside from whatever work the code itself does that would use power).
Frankly, arguing that deleting the file is having any impact on the reported battery level on these devices is the same as arguing that the sun orbits the earth. It just isn't true, and you can go right into the code and see this for yourself.
Click to expand...
Click to collapse
Related
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Do we really need this since it's a Li-ion battery? I know Ni-Mh and Ni-Cad has memory effect, but not on the Li-Ion battery.
I was just wondering the same thing today....simply because there seems to be several different methods to do it. Some say charge 8 hours, turn off, charge and hour, unplug, turn on charge 10 minutes. Then other methods say to do something different....be nice to have an app to walk you through different methods so you know step by step your doing it right
I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both
deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Click to expand...
Click to collapse
That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
All the battery calibration tools, are basically deleting the file... right?
Is it that hard to boot into recovery and wipe battery stats?
deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Click to expand...
Click to collapse
I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
paulieb81 said:
That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
Click to expand...
Click to collapse
Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.
the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????
turn your brightness to 100% and change it so that it never turns off; use wifi tether and play a 720p movie at the same time; oc your kernel to it's highest stable frequency. it'll drain pretty quickly.
I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.
mykeldrip said:
the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????
Click to expand...
Click to collapse
That's because the phone stops charging when it reaches 100%, and runs off of battery probably until it reaches in the low 90s, then charges again. You won't ever notice this because the light will always be green. However, you'll notice that unplugging it a few moments after it turns green, the battery will stay anywhere from 100%-98% for a while. At least on my phone it does.
Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)
laydros said:
I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.
Click to expand...
Click to collapse
I am by no means an expert so if you find any reliable info on this and can link us to read, I would love to learn more. All I know is that it is commonly said to drain rechargeable batteries and that I have seen that topping them off very often does lead to battery life degradation.
Tyzing said:
Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)
Click to expand...
Click to collapse
There is no need to fully drain the battery. Its purpose in calibration is to configure the software that is correlating voltage to percentage charged. That's all. Regarding the old Apple advice, that is doing the same thing. It will not affect the hardware.
Now, what WILL affect the hardware is charging itself. Every charge/discharge cycle will reduce the total capacity of the battery. This is why the EVO will not cycle on it's own until 10% discharged. It's improving the overall battery life by that restriction.
In short, you will save money overall by getting a higher capacity battery that you don't force to charge too often. Draining your battery does nothing but give you peace of mind and it only really needs recalibrating when it's total capacity has been reduced which isn't often. 3-6 months.
Sent from my PC36100 using XDA App
herbthehammer said:
I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.
Click to expand...
Click to collapse
Yeah except that's not a good idea, it will kill the weak cells.
I understand. Still think it would be useful if it would do the "juice until LED changes" method while sleeping though
paulieb81 said:
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
Click to expand...
Click to collapse
I'm interested!
Btw - what are the charging calibrations people are using? Are you seeing one working better than another?
Im a noob, so take what I say worth a grain of salt but yesterday I did the standard method where you fully charge...turn off...plug back in until led changes green and do it a few times.
I went from 9 hours to 17 hours with no other changes except a few profiles in setCPU.
I did this just last night so my results are fresh.
Tyzing said:
I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both
Click to expand...
Click to collapse
A few SetCPU profiles is all it takes to see a dramatic increase in battery life, especially while screen off. If you disable it I bet whatever gain you think was from 'calibrating' it disappears.
Can someone please give me some advice on what to do with my battery! Only been on for about 7 hours and I'm already at 34%!! Well 33 as of now.. This is NOT normal! Only talked for about an hour total today! I always have wifi on because I don't have a data plan! -Medium usage.
-pics enclosed!
-system info/rom/kernel info!
-please help!! Thanks!
Sent from my HTC Vision using XDA Premium App
Some advice I can shed on this is having Wifi on all the time, (by all the time you mean at least 24/7), that could be a strong point why your battery life is low. Another thing is the number of apps that require data being pulled running in the background
1. Having Wifi on for the time you state is bad if you don't have a signal. Reason why is that since there is no signal for your Wifi to obtain it will continue to search and fail, search and fail which actually drains some good amount of battery being forced to repeat such a task unlike when having a steady signal it's usage becomes minimal
2. High number of data pulling apps also works the same except then have the option to change the time they pull data which can be usually found under settings/options tab
Try these out and let us know how it goes =]
xArcane1x said:
Some advice I can shed on this is having Wifi on all the time, (by all the time you mean at least 24/7), that could be a strong point why your battery life is low. Another thing is the number of apps that require data being pulled running in the background
1. Having Wifi on for the time you state is bad if you don't have a signal. Reason why is that since there is no signal for your Wifi to obtain it will continue to search and fail, search and fail which actually drains some good amount of battery being forced to repeat such a task unlike when having a steady signal it's usage becomes minimal
2. High number of data pulling apps also works the same except then have the option to change the time they pull data which can be usually found under settings/options tab
Try these out and let us know how it goes =]
Click to expand...
Click to collapse
Thanks for the info
When I have wifi on, I am always somewhere where I have wifi. I do leave it on while driving, but that's no more that a few minutes until it reconnects.
Sent from my HTC Vision using XDA Premium App
Hmmmmm
I barely noticed that you are running a custom rom. After flashing the new rom did you wipe battery stats? If not, that can actually affect battery life as all roms run differently and different data is applied to the battery stat
There are two ways to go about wiping the stats. You can boot into recovery and Wipe Dalvik Cache under the advanced settings or you can download Battery Calibration from the marketplace which in my experience is a lot easier
Battery Calibration
The instructions are inside the app on how to implement the process
I had this rom for a while but when I flashed it, I did not wipe data or anything. I decided to wipe data to give it a try and reflashed it. I charged it completely and calibrated it. I am in the process of running the battery until it dies so I can recharge it to complete the calibration process.
Sent from my HTC Vision using XDA Premium App
Be sure to post back your results and hopefully if nothing has improved I'll try again to assist you =]
Ran it last night untill it was dead and let it charge throughout the night. Testing battery life now! Will post results when at 8 hours. Would post at 7 again but I am gooing on a college visit today and won't be using it then.
Sent from my HTC Vision using XDA Premium App
DroidCell said:
Ran it last night untill it was dead and let it charge throughout the night. Testing battery life now! Will post results when at 8 hours. Would post at 7 again but I am gooing on a college visit today and won't be using it then.
Click to expand...
Click to collapse
DO NOT drain the battery until it dies!!! Just down to 15-20%, then charge to full, repeat a couple times. Over-discharge is not good for Li ion batteries.
People on here keep recommending it, or saying they do it. Its NOT a good idea, and proliferating this bad advice needs to stop. Draining the battery to dead is bad for the life of the battery. Also over-discharge can possibly render the battery unable to take a charge, requiring you to buy a new battery. It doesn't happen often, but its happened to a few different people on this phone, and other phones as well.
redpoint73 said:
DO NOT drain the battery until it dies!!! Just down to 15-20%, then charge to full, repeat a couple times. Over-discharge is not good for Li ion batteries.
People on here keep recommending it, or saying they do it. Its NOT a good idea, and proliferating this bad advice needs to stop. Draining the battery to dead is bad for the life of the battery. Also over-discharge can possibly render the battery unable to take a charge, requiring you to buy a new battery. It doesn't happen often, but its happened to a few different people on this phone, and other phones as well.
Click to expand...
Click to collapse
You seem to know a lot so i'm gonna ask ya redpoint. People say there is a built in safety zone so even when the battery is reporting as 0 it really isn't. The batteries do not allow themselves to get below a certain threshold for the reason you are explaining. Is this not true? Lots of people who know nothing of xda or cell phones in general let there phone run the whole way out for whatever reason. I would think that cell/battery manufacturers would take that into consideration.
the reason people used to tell you to drain the battery complete was based on an older battery tech that has what you would call a "memory" it needs to "memorize" it's lowest and highest point in order to calibrate the battery. Li-ions do not need that. They actually keep track of your charge cycles.
suppose it can handle 1000 cycles. on the first day, you used up 75% of your battery and put it on the charger to max. then the next day you use another 75% and do the same thing. at this point what actually happens is that the battery will count this as 1.5 cycles rather than 2 cycles. But redpoint is right.
Do NOT drain the battery completely when it's a Li-ion battery. it's old advice for old tech battery that is legit for that type of battery but not Li-ion batteries.
To calibrate your battery, you just use your phone normally. It will figure out where it is supposed to be as you use and charge it over the course of a few days.
better battery life
Notice on the graph, the screen was not on for a while though...
Sent from my HTC Vision using XDA Premium App
xsteven77x said:
You seem to know a lot so i'm gonna ask ya redpoint. People say there is a built in safety zone so even when the battery is reporting as 0 it really isn't. The batteries do not allow themselves to get below a certain threshold for the reason you are explaining. Is this not true? Lots of people who know nothing of xda or cell phones in general let there phone run the whole way out for whatever reason. I would think that cell/battery manufacturers would take that into consideration.
Click to expand...
Click to collapse
It is true that there is a built in 'safety zone' so that the battery does not drain completely to zero.
However, it is also true that this 'safety zone' can and HAS failed for some users (including some who are on these forums)
With the way that Li-Ion batteries work, and 'calibrate', there is no added benefit to draining it completely to zero. If there is no benefit, then the risk is not worth it.
DroidCell said:
Can someone please give me some advice on what to do with my battery! Only been on for about 7 hours and I'm already at 34%!! Well 33 as of now.. This is NOT normal! Only talked for about an hour total today! I always have wifi on because I don't have a data plan! -Medium usage.
-pics enclosed!
-system info/rom/kernel info!
-please help!! Thanks!
Sent from my HTC Vision using XDA Premium App
Click to expand...
Click to collapse
These ideas ran through my mind reading your post:
I. You might want to calibrate your battery. I've run into many instruction how to do this (just google the keywords: Desire Z calibrate battery), but basically the ones that do NOT require you to drain your battery to zero first, came down to this:
0. Turn Fastboot OFF!
1. Power on your Desire then connect to your Charger and Fully charge until the LED changes Green.
2. Disconnect your phone from the charger and then power off.
3. Reconnect your phone to your charger with the power off and wait for the green LED.
4. Disconnect the phone from the charger and power it on.
5. Once the phone has fully booted / ready to use ... power off again.
6. With the power off connect the phone to the charger and wait for the green LED.
7. Disconnect from the Charger then power on and use normally.
Many people seem to have greatly increased their battery life just by following those simple steps. I am currently in the process of trying it myself, but will probably need some hours before I can verify if the overall life has significantly increased.
II. You might want to install an App like "Watchdog lite" for a longterm check if you have any apps or processes, that work as a battery eater in the background.
III. if the above tips should fail, you might want to upgrade your radio and maybe also align the radio library (RIL), to match it best with your radio and ROM. But do a lot of reading and research before actually performing that task, since this is nothing for beginners and might even make things worse. This thread might be a good point to start your research.
hope that helps,
Tronar
BATTERY CALIBRATION
Hi!
As we know when we install a new rom we sometimes have battery drain or when we flash a new kernel etc..... what is this?? this means that your battery goes to 0% very quickly!
The normal steep is goes to recovery and wipe battery stats!!
but what i do if in recovery don't appear something like wipe battery stats??
simple!! be sure that your nexus is completely charged,download this app ,, tap on battery calibration !! (after that charge your nexus without break)and congratulations.... buy a beer and make a party!!
I don't made this app.... just share it....
i will upload the link in a note pad... why?? simple.... i can't put links!!!
There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.
Shmi117 said:
There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.
Click to expand...
Click to collapse
o really?? i post that because sometimes when i flash a new kernel my battery percentage lie.... when i had for example 15% mi tablet shut down and i calibrate with this app and mi tablet shut down in 0%... normally...... and i do that always y flash a new rom or a kernel...... maybe i'm wrong .....
Shmi117 said:
There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.
Click to expand...
Click to collapse
It doesn't even need to be to zero.
Everyone should go to batteryuniversity.com and read the articles on cycling and charging li-Ion batteries. Then you will be able to make sense of conflicting advice on batteries.
Current: Note 2 - Nexus 7 - Charge
Retired: Player 5.0 - Fascinate
<><><><><><><><><><>
Read twice, flash once
ezas said:
It doesn't even need to be to zero.
Everyone should go to batteryuniversity.com and read the articles on cycling and charging li-Ion batteries. Then you will be able to make sense of conflicting advice on batteries.
Current: Note 2 - Nexus 7 - Charge
Retired: Player 5.0 - Fascinate
<><><><><><><><><><>
Read twice, flash once
Click to expand...
Click to collapse
mmmmm thanks for the page....
The myth of wiping battery stats was thoroughly debunked almost a year and a half ago. It is a 100% true statement that neither this app nor wiping battery stats in recovery has ever affected anyone's battery life or battery indication in any way, shape, or form.
Want to know why battery drains after flashing a new rom or kernel? Hint- it has absolutely nothing to do with incorrect battery stats- totally disregarding the fact for a moment that batterystats.bin has absolutely nothing to do with battery charge indication.. After flashing a new rom, your device is actually using more battery than usual as accounts are set up and synced. Likewise, after flashing a new kernel, it takes a short amount of time for the kernel to "settle."
If you still believe the myth that battery stats need to be wiped every now and again, there's an even easier way to do it than wiping in recovery or using some snake oil app... charge your device to full or near full and then unplug it from the charger. Voila- you've just successfully wiped battery stats!
Shmi117 said:
There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.
Click to expand...
Click to collapse
This.
OP, stop posting nonsense. Seriously.
Strange battery behavior
It's actually odd, my battery started getting stuck at 100% like a week ago or so, after 11 hrs standby time and 30 mins screen-on time, it doesn't even drop 1%. However, it shuts down normally at 1%. I actually tried so many things to fix this, i opened the back cover and pulled the battery out, i let it run dead and charge it all the way up, but it just seems to like that 100% mark. Since it actually shuts down at 1%, i wanted to make sure it's completely dead, so i booted into recovery and oddly, with max brightness in twrp, it took about 15 mins for the device to completely shut down.
Any ideas what might fix this?
coolbyte9 said:
It's actually odd, my battery started getting stuck at 100% like a week ago or so, after 11 hrs standby time and 30 mins screen-on time, it doesn't even drop 1%. However, it shuts down normally at 1%. I actually tried so many things to fix this, i opened the back cover and pulled the battery out, i let it run dead and charge it all the way up, but it just seems to like that 100% mark. Since it actually shuts down at 1%, i wanted to make sure it's completely dead, so i booted into recovery and oddly, with max brightness in twrp, it took about 15 mins for the device to completely shut down.
Any ideas what might fix this?
Click to expand...
Click to collapse
Bear in mind that you optimally do not want to discharge the battery to the point of shutdown. Doing so shortens its lifespan, and can trigger the N7 to go into a hibernation mode on order to protect the battery from permanent unrecoverable damage due to a deep discharge.
Sent from my Nexus 7 using Tapatalk HD
najaboy said:
Bear in mind that you optimally do not want to discharge the battery to the point of shutdown. Doing so shortens its lifespan, and can trigger the N7 to go into a hibernation mode on order to protect the battery from permanent unrecoverable damage due to a deep discharge.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
I do know that, I just wanted to try out every thing that could fix this annoying bug.
seriously, battery calibration is for nothing and waste your data and time to download it..
najaboy said:
The myth of wiping battery stats was thoroughly debunked almost a year and a half ago. It is a 100% true statement that neither this app nor wiping battery stats in recovery has ever affected anyone's battery life or battery indication in any way, shape, or form.
Want to know why battery drains after flashing a new rom or kernel? Hint- it has absolutely nothing to do with incorrect battery stats- totally disregarding the fact for a moment that batterystats.bin has absolutely nothing to do with battery charge indication.. After flashing a new rom, your device is actually using more battery than usual as accounts are set up and synced. Likewise, after flashing a new kernel, it takes a short amount of time for the kernel to "settle."
If you still believe the myth that battery stats need to be wiped every now and again, there's an even easier way to do it than wiping in recovery or using some snake oil app... charge your device to full or near full and then unplug it from the charger. Voila- you've just successfully wiped battery stats!
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i have a question....... i discovered this app because mi battery was giving me problems..... for example...... it charges very quickly .... and when i had mmmmm 15% my tablet just shutdown....... when i use this app, i charged my battery to 100% and i "calibrate" my battery ,and my battery works perfect again, now my tablet shutdown in 0% or something like that..... so that could be called calibration.... o what?
thanks!!
alonsoch said:
i have a question....... i discovered this app because mi battery was giving me problems..... for example...... it charges very quickly .... and when i had mmmmm 15% my tablet just shutdown....... when i use this app, i charged my battery to 100% and i "calibrate" my battery ,and my battery works perfect again, now my tablet shutdown in 0% or something like that..... so that could be called calibration.... o what?
thanks!!
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The app has nothing to do with it as the only thing it clears is the list of processes that have operated on battery since the last full or near full charge.
The only "calibration" that an end user can perform entails a complete discharge/charge cycle. This resets the flags for the battery's internal fuel gauge.
Sent from my Galaxy Nexus using Tapatalk 2
Is there a fix for stuck battery percentage? My tablet was working fine and all of a sudden I realized it was being stuck at 100% regardless of how much I used it.
Aria807 said:
Is there a fix for stuck battery percentage? My tablet was working fine and all of a sudden I realized it was being stuck at 100% regardless of how much I used it.
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a reboot usually fixes it
thx fo info
does that mean these two posts are crap?
http://forum.xda-developers.com/wiki/Battery_Calibration
http://www.xda-developers.com/andro...asy-way-with-battery-calibration-for-android/
dosmastr said:
http://forum.xda-developers.com/wiki/Battery_Calibration
http://www.xda-developers.com/andro...asy-way-with-battery-calibration-for-android/
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Both are outdated.
Sent from my Nexus 7 using Tapatalk HD
najaboy said:
The only "calibration" that an end user can perform entails a complete discharge/charge cycle. This resets the flags for the battery's internal fuel gauge.
Sent from my Galaxy Nexus using Tapatalk 2
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This is all the recalibration the device needs.
Naja is 99% correct. It's not the only calibration you can do (you can wipe stats), but it's the only one you should need to do.
batteryuniversity.com has a couple of good articles on the care and feeding of Li-Ion batteries. There is a lot of less than accurate info that floats around about batteries. The above site is a good way to learn the difference.
Sent from my Nexus 7 using xda premium
Wiping stats does nothing in terms of calibration.
Sent from my SCH-I545 using Tapatalk 4 Beta
Hello, unfortunately I haven't been in possession of my phone for a good amount of time, and I believe when I lost it the battery was run down to zero percent. IF I ever manage to get this device back, will there be any major battery issues I should be worried about? The device was only a few weeks old when I lost it. If anybody can answer this, I'd appreciate it. Thank you.
I'm sure it'll be fine if you do end up finding it. Battery issues might only arise if you're constantly discharging to 0% which is harmful to the battery. Once should not make a big difference.
itsamoreh said:
I'm sure it'll be fine if you do end up finding it. Battery issues might only arise if you're constantly discharging to 0% which is harmful to the battery. Once should not make a big difference.
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So the fact that it's been dead for so long won't have an impact on the battery life? I only ask because I read something about that not being good, but I don't know how old that article was or if it's even still applicable. Thanks again.
In actuality, the battery voltage is not even close to zero, when the battery meter says zero and the phone shuts off.
The battery has safeguards to prevent the battery voltage dropping too low (too low, and it won't take a charge). If/when you get the phone back, leave the phone on charger overnight, and see if you can get it working by holding down the power button for several seconds.
redpoint73 said:
In actuality, the battery voltage is not even close to zefar when the battery meter says zero and the phone shuts off.
The battery has safeguards to prevent the battery voltage dropping too low (too low, and it won't take a charge). If/when you get the phone back, leave the phone on charger overnight, and see if you can get it working by holding down the power button for several seconds.
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That's very good to know, I'll keep that in mind. So from the information posted so far, it's safe to say that this scenario will have NO negative effect on the overall battery life?
urbanism91 said:
That's very good to know, I'll keep that in mind. So from the information posted so far, it's safe to say that this scenario will have NO negative effect on the overall battery life?
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Correct. Should have no negative effect.
urbanism91 said:
That's very good to know, I'll keep that in mind. So from the information posted so far, it's safe to say that this scenario will have NO negative effect on the overall battery life?
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It might also be safe to say you may never see your phone again. I mean, it's been 6 months.
urbanism91 said:
That's very good to know, I'll keep that in mind. So from the information posted so far, it's safe to say that this scenario will have NO negative effect on the overall battery life?
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That is not at all what I am saying. Li ion batteries should be stored at a certain voltage level, otherwise negative impact can occur. Its also possible the voltage has dropped by this point, that the phone will not properly take a charge.
If/when you get the phone back, try to charge overnight and see if it will power on. Otherwise, another option is to find a repair shop with a battery meter with a "boost" function can sometimes bring Li ion batteries back to life after the voltage has dropped too low. But the phone may need to be opened up to do this.
All,
Last weekend, I experienced the most unusual occurrences where my Note 7 battery just drained within minutes while at least half full. I was browsing the internet on my phone waiting for a drink. I put the phone down to pick up the drink, and when I went back to the phone, I could not interact with it. I pressed on the power button for a few seconds, nothing. Went back to the car and plugged it up and there it went, it was out of power. I first thought it was weird, cause I could have sworn I had at least 40% batter left. Ok, whatever, that night it happened again. I'm pretty anal about battery power, so I will definitely notice when my battery reaches a low level especially so low that power shuts off.
Ever since the two incidents my phone has been running fine during the week. Just right now, I noticed my battery was at 39%, so I was like ok, let me plug it in and give it some juice before I leave work. I stepped away for a few seconds and come back to my phone and see it at 11%, I was like what?? I unlock my phone, and seeing it go down 10%, 9% while its being charged...I started "close all apps", still going down 8%, I go to settings, "optimize" and optimize all, nothing, 7%, finally drag down notification, close the Tidal app widget, and clear all, think what was left was Good app. 6%....keep watching the battery screen...7%...few seconds more 8%. PHewwww....
WTF was that?? Was it a rogue app that was sucking up the battery? But what triggered it? I checked GSAM battery tracker, Android System at 35% CPU usage 6h 9m, next is Kernel 11% 1h 56m, then Good 5.3% 55m..Instagram 4.9% 52min....
Its happened to me 3x within a week. GSAM is not telling me any info on what is causing this.
Any ideas?
If I were you , I would shut it down and return it .
tossero said:
If I were you , I would shut it down and return it .
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me too
Sent from my SM-N930F using XDA-Developers mobile app
But from what I just did, to me it's gotta be a rogue app that's causing this or something is going on with the system. I also just wiped cached partition.
Sent from my SM-N930T using Tapatalk
Nutzzer said:
But from what I just did, to me it's gotta be a rogue app that's causing this or something is going on with the system. I also just wiped cached partition.
Sent from my SM-N930T using Tapatalk
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Yes , maybe . Phone freezing and battery rapidly discharging in the actual context doesn't seem good. Be cautious...
Cheers~
Get rid of it ASAP!
When batteries discharge faster than expected they can generate heat, this heat can trigger the bad battery "explosion" we are all fearing.
This sounds like a prime situation. Shut the phone off and leave it off.
Get it replaced ASAP.
you should replace it
this is faulty battery
how long you had it so far
and how was batterg life , lagging , overheating like ?
FAULTY ALERT. do a scratch test and return it! lmao jk. just return it.
I have also had this happen where I check my battery percentage 75% then not a minute late my device is off and wont start up until I plug in a charger and then maybe 5 minutes later it show 30%. Something is really screwed up with the either these batteries or the phones themself. Worst decision ever was to not make the battery user replaceable! My Note 7 is going back once the replacements are available.
laserbiz said:
I have also had this happen where I check my battery percentage 75% then not a minute late my device is off and wont start up until I plug in a charger and then maybe 5 minutes later it show 30%. Something is really screwed up with the either these batteries or the phones themselves. Worst decision ever was to not make the battery user replaceable! My Note 7 is going back once the replacements are available.
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Yup...I don't believe its the battery but something in the OS. I don't really care about removable batteries, but this battery fiasco, the lag, the battery drainage we experiencing...I think I'm done guys. I'm still on the fence, but leaning towards to the Iphone 7 Plus.
I honestly think it's something in the battery. The way they're exploding and the way it randomly drains points to battery issues. Plus if it was a software issue, Samsung would have pushed an update a long time ago. It's much easier to push an update than recall every single phone. I personally think the chemistry in the battery is off, that's why we get random drains and exploding batteries. Regardless, mine is getting exchanged as soon as the replacements are available. Btw, mine has been doing the same thing for the past week, so I know about having 50% or more of battery and it going completely dead. That's can't be because of the software. The phone would get hot if a rogue app was draining that fast. Not to mention I've never seen a rogue app drain a battery instantly...
Sent from my SM-N930T using Tapatalk
This could also be the electronics not accurately determining the batteries voltage. In turn, allowing the battery to charge well above what's safe (3.7v battery charged by a 5v charger)- and if there's one thing you don't do to lithium batteries it's overcharge them.
Phlip00ws6 said:
This could also be the electronics not accurately determining the batteries voltage. In turn, allowing the battery to charge well above what's safe (3.7v battery charged by a 5v charger)- and if there's one thing you don't do to lithium batteries it's overcharge them.
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If the battery is not defective and it's the Power Management Circuit which is problematic, then the risk will even be more disturbing than the idea of having a defective battery. Anyone knows whether the Exynos variant is also using Qualcomm power management IC?
This is the extent of what Samsung is saying:
Based on our investigation, we learned that there was an issue with the battery cell. An overheating of the battery cell occurred when the anode-to-cathode came into contact which is a very rare manufacturing process error."
The leads shorting doesn't represent a problem with the cell - overheating/exploding would be normal in this situation.
Phlip00ws6 said:
This is the extent of what Samsung is saying:
Based on our investigation, we learned that there was an issue with the battery cell. An overheating of the battery cell occurred when the anode-to-cathode came into contact which is a very rare manufacturing process error."
The leads shorting doesn't represent a problem with the cell - overheating/exploding would be normal in this situation.
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You have copy of the full report. I'm interested to read their findings.