Develop Bugs

My GN battery could only charge up to99%?

Hi, after three times full cycle charge(one through the socket on the wall and two via usb). I found my galaxy nexus battery could only be charged up to 99%, even there is a "complete" showed on the locked screen.
So do i need to reset my phone xia bootloader or anybody know how to solve that? Many thanks!!!!!!
Sent from my Galaxy Nexus using XDA App

flyhighln said:
Hi, after three times full cycle charge(one through the socket on the wall and two via usb). I found my galaxy nexus battery could only be charged up to 99%, even there is a "complete" showed on the locked screen.
So do i need to reset my phone xia bootloader or anybody know how to solve that? Many thanks!!!!!!
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
Known, this is for battery protection.For example sgs2 showed 100% but it is not actually 100%.Galaxy Nexus shows the correct level.Dont worry

Mine only goes up to 97%! Very annoying.
Sent from my Galaxy Nexus using Tapatalk

98% here! Although I've gotten used to it now.

RTContent said:
98% here! Although I've gotten used to it now.
Click to expand...
Click to collapse
Have you guys tried to turn off your phone and then let it charge once it is full turn it back on? I noticied that was the only way

I was about to post here to ask about this, as I've noticed it as well. Good to hear it's normal, but I'm curious how it protects the battery.

This is standard charging behaviour and happens on the Nexus S too (which is currently my phone). There were similar questions on the Nexus S general forum about this behaviour too.

It is for increasing battery life. You should not charge it to maximum or discharge it completely. It's a well known fact about Li-Ion batteries...

afilopou said:
Known, this is for battery protection.For example sgs2 showed 100% but it is not actually 100%.Galaxy Nexus shows the correct level.Dont worry
Click to expand...
Click to collapse
Thanks mate~ I am new on Android, so just curious about this....

I have this issue too. I have noticed that if I unplug it and plug it back in, it will charge to 100%. I had assumed it was because I was using the Samsung 700ma charger. Guess not.
I have noticed my Galaxy Tab 7 does the same thing, but it will show 100% until I unplug it then it will go down immediately to a lower level, I plug it back in and let charge and it goes to 100%.
I have guessed that what is happening is that once it charges to 100%, it stops charging and starts using battery, thus the decrease. I have not watched it to try to catch it as soon at it done charging to see if this is the case as I always charge overnight.
I would guess that if I let it get low enough, it would start charging again. I know my laptop will not charge the battery unless it is 90% or less to prevent top offs that shorten battery life.

ankitb4u said:
Have you guys tried to turn off your phone and then let it charge once it is full turn it back on? I noticied that was the only way
Click to expand...
Click to collapse
will try this tonight！

robinsmy1 said:
I have this issue too. I have noticed that if I unplug it and plug it back in, it will charge to 100%. I had assumed it was because I was using the Samsung 700ma charger. Guess not.
I have noticed my Galaxy Tab 7 does the same thing, but it will show 100% until I unplug it then it will go down immediately to a lower level, I plug it back in and let charge and it goes to 100%.
I have guessed that what is happening is that once it charges to 100%, it stops charging and starts using battery, thus the decrease. I have not watched it to try to catch it as soon at it done charging to see if this is the case as I always charge overnight.
I would guess that if I let it get low enough, it would start charging again. I know my laptop will not charge the battery unless it is 90% or less to prevent top offs that shorten battery life.
Click to expand...
Click to collapse
the way you used is exactly what my friend told me to do. He has the same issue, and if he unplug the charger when a 'complete' showed on the locked screen and replug it, you could get a 100%!!

Same problem here but I dont care.

I had this problem. My GN would only charge to 98% so I left it on charge for nearly 8 hours and it eventually got to 100% I carried out a battery calibration using this app from the market and its been perfect ever since I've even noticed an increase in battery life
https://market.android.com/details?id=com.nema.batterycalibration
Sent from my Galaxy Nexus using xda premium

flyhighln said:
the way you used is exactly what my friend told me to do. He has the same issue, and if he unplug the charger when a 'complete' showed on the locked screen and replug it, you could get a 100%!!
Click to expand...
Click to collapse
Your not supposed to do this. Charging to 100% and/or letting it drop to 0% decreases battery life in the long run. This applies to all LI-ION batteries, in your laptop, or anything else.
You people that complain about 96-99% just need to get over it. It's like that for a reason. Don't go chasing mods the charge it to 100%, or ways to trick it into saying 100%, just accept that when it says charged it is.
edit: Sorry if I come off as an 8==D. Just tired of seeing posts like this (the nexus S does the same thing. Its by design for a reason.)

My galaxy nexus charges all the way to 100%. But when i leave it charging overnight, when i wake up its on 97%. I think its a built in safety feature to prevent the phone from charging when left plugged in for an extended period.
Sent from my Galaxy Nexus using Tapatalk

Oh good to know this is intentional.

[Q]Battery not charging to 100%

When I wake up and take my phone off the charger, it's always at like 98 or 97%. I have battery monitor and when looking at it, it shows that it gets to 100% through charging, then goes down to 98 or 97 and then stays at that state throughout the night.
Anyone else having this happen with their phone? With enough battery issues, it seems these 2 or 3% could be an hour of standby.

When the phone hits 100% on the charger it doesn't charge anymore to prevent overcharging.. pretty common feature in most phones nowadays.. if it goes below a threshold it charges again until 100 and the process repeats
Sent from my Galaxy Nexus using xda premium

same issue... my thunderbolt use to hit 100%, but the gnex stops at 99 or 98%. if i unplug the charger for few seconds, plug it back in and boom it goes to 100%

Same issue here. Seems to stay on 99 until I unplug charger and plug it back it.
Sent from my Galaxy Nexus using xda premium

This isn't an issue..

volfman said:
Same issue here. Seems to stay on 99 until I unplug charger and plug it back it.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
If you want to get 100% (not saying it makes a difference when it's showing at 98/99%, what volfman suggest it the best way to do it. I did it with my SGS2

it should charge to 100% in the first place. another bug that needs to be fixed... hopefully the 4g gets fixed first cuz with this, i can live with.
The reason i want `100% is cuz its nice to see the 100% rather then 99%.

Phone stuck at 99% while charging

I'm on FB17 and my phone is getting really hot while charging is stuck at 99%. It's been like this for a couple hours. anyone know what's up?
Sent from my SPH-D710 using XDA App

Is something running? When you're plugged in, you're still running off the battery. Mine only goes 100% if it's in standby while plugged in.

Nothings running at all
Sent from my SPH-D710 using XDA App

Turn off the phone and let it charge.
If that doesn't work, pull the battery and let it sit for 2 minutes

Yeah, I'm having the same issue. Also read a few others were as well. I'm going to try and recalibratey battery. Ill keep you posted.

+1 to Nibrs' comment. I would shutdown the phone completely, let it take a full charge WITHOUT the android OS running, unplug the charger, remove the battery for a few minutes then boot the phone back up. After it's been up and running and settled in, plug the charger back in once again. It could take 30-45 minutes to finish this last trickle charge.

I've had this issue since cm9 alpha 1. Don't really care.
Sent from my SPH-D710 using XDA

Aganar said:
I've had this issue since cm9 alpha 1. Don't really care.
Click to expand...
Click to collapse
Thanks for your non-contribution to this thread.

Alright, are calibrating didn't work ( might of helped battery life tho) it charges to 100% only when my phone is off. As soon as I turn it on, its at 99%. I miss my blue led.
Sent from my SPH-D710 using XDA

Mine will be stuck on 99% for a long time also but mine will eventually say 100%. It has to do with how the battery is charged. Once it gets to a certain point it only does a slow trickle charge to maintain the battery level. So for the 99% part it's supposed to do that but you shouldn't have those heat issues. Did you flash a new ROM recently by chance?

MeWarning said:
Mine will be stuck on 99% for a long time also but mine will eventually say 100%. It has to do with how the battery is charged. Once it gets to a certain point it only does a slow trickle charge to maintain the battery level. So for the 99% part it's supposed to do that but you shouldn't have those heat issues. Did you flash a new ROM recently by chance?
Click to expand...
Click to collapse
Since GB my phone has done this same thing. I just figured its an ICS thing...really if u think about it, ur phone is at 100% while charged...u unplug it and it is using battery so you're at 99.999 percent off the bat...seems like the phone just doesn't round less than whole numbers.
Sent from my SPH-D710 using XDA

dante32278 said:
Since GB my phone has done this same thing. I just figured its an ICS thing...really if u think about it, ur phone is at 100% while charged...u unplug it and it is using battery so you're at 99.999 percent off the bat...seems like the phone just doesn't round less than whole numbers.
Sent from my SPH-D710 using XDA
Click to expand...
Click to collapse
You're not actually fully charged when you unplug it. It would be in the 90% area because it doesn't constantly charge the battery. It stops once it gets to a certain point and then will start charging again once the battery hits a certain minimum level.

Well, took almost 12hrs of charging but finally got to a 100%. Btw. I'm on blu kuban rom. Not sure if its a ics bug or a battery issue. Never had this happen in stock.
Sent from my SPH-D710 using XDA

I think it is supposed to float between 95% - 100% to avoid damaging the battery.
Sent from my SPH-D710 using XDA

Don't know if this a factor but had this happen today on ff09. Battery jumped from 54% to 10% on one reboot (phone was hot)... Rebooted again and back up to 26%.
Got home, plugged in on LG cord to 99%. Changed to Sammy charger, finished 2 hrs later.
Sent from my SPH-D710 using XDA

tdunham said:
+1 to Nibrs' comment. I would shutdown the phone completely, let it take a full charge WITHOUT the android OS running, unplug the charger, remove the battery for a few minutes then boot the phone back up. After it's been up and running and settled in, plug the charger back in once again. It could take 30-45 minutes to finish this last trickle charge.
Click to expand...
Click to collapse
That's awesome info, I'll have to try that. Thanks!
Sent from my SPH-D710 using XDA

How many cycles have you gone since flashing? I have been on blu kuban for over a month now. I update the instant I see an update. Most times it takes around 3 full battery cycles before I see decent life. This last update seemed to take longer than usual to see normal battery behavior. First I would try draining battery to 5%, run battery calibration script in the updater then fully charge and calibrate again. If it continues I would recommend the standard restore to stock and reinstall.
Sent from my ridiculously long named phone ---
Sprint Samsung Galaxy S II Epic 4G Touch

Q: After full charge..and unplugging

After full charge and unplugging do you find that it drops right to 99% or lower? Even though it says 100% before unplugging?

Yea mine does that too. Seems kinda weird how it drops instantly
Galaxy SIII via XDA premium

Nah, mine takes about 30 mins or so.
Sent from my SGH-I747 using xda premium

your battery is probably uncalibrated. mine stays for 100 for a while.

How do you calibrate the battery on these phones?

i did calibrate with batterycalibration app

Mine stays at 100% for a while after unplugging.

Charge hour phone with it powered on, when it reaches 100% unplug it, turn it off, when it's fully powered off, plug it in, let it charge when it reaches 100% with power off unplug it power back on, for the same, then use battery calibration app.
Works great for me with every android phone. (don't think you can charge your phone with it powered off if you're using cyanogenmod)
Sent from my SGH-I747M using xda premium

Charging at night?

Is it safe to charging at night, if it's not, what will it do to the battery?
Customer service always tells me to charge it just for 3-4 hours, but I have difficulty with that since I get home late and I leave early, but I still manage to get a full battery without it charging overnight but I would just like to know
Sent from my SGH-M919 using xda app-developers app

kevinrubio1 said:
Is it safe to charging at night, if it's not, what will it do to the battery?
Customer service always tells me to charge it just for 3-4 hours, but I have difficulty with that since I get home late and I leave early, but I still manage to get a full battery without it charging overnight but I would just like to know
Sent from my SGH-M919 using xda app-developers app
Click to expand...
Click to collapse
I do it when I can't get a full charge before bed; but I also wake up 2-3 times per night and tend to unplug it once I notice it's at 100%. I've read that once it reaches 100%, if it stays on charge for a certain amount of time it will switch to battery and drain, then charge back to 100% after a certain percentage is drained. I would say that's the case as I woke up one morning and the phone was at 92% charge and was in the process of charging. Battery info said it was charging on AC and the graph showed it went to 100% then back down.

lordcheeto03 said:
I do it when I can't get a full charge before bed; but I also wake up 2-3 times per night and tend to unplug it once I notice it's at 100%. I've read that once it reaches 100%, if it stays on charge for a certain amount of time it will switch to battery and drain, then charge back to 100% after a certain percentage is drained. I would say that's the case as I woke up one morning and the phone was at 92% charge and was in the process of charging. Battery info said it was charging on AC and the graph showed it went to 100% then back down.
Click to expand...
Click to collapse
Hmm that's weird, but from the sounds of that, I don't think it's healthy for the battery to charge for a long time
Sent from my SGH-M919 using xda app-developers app

lordcheeto03 said:
I do it when I can't get a full charge before bed; but I also wake up 2-3 times per night and tend to unplug it once I notice it's at 100%. I've read that once it reaches 100%, if it stays on charge for a certain amount of time it will switch to battery and drain, then charge back to 100% after a certain percentage is drained. I would say that's the case as I woke up one morning and the phone was at 92% charge and was in the process of charging. Battery info said it was charging on AC and the graph showed it went to 100% then back down.
Click to expand...
Click to collapse
Sounds like Google services are using your phone at night. That happens to s lot of people but can be stopped if you follow the battery life thread that skipjacks started.
Sent from my SGH-M919

lalec said:
Sounds like Google services are using your phone at night. That happens to s lot of people but can be stopped if you follow the battery life thread that skipjacks started.
Sent from my SGH-M919
Click to expand...
Click to collapse
That thread is perfect! I would use it but I need notifications to notify me but I did use it for a night! Amazing difference
Sent from my SGH-M919 using xda app-developers app

lalec said:
Sounds like Google services are using your phone at night. That happens to s lot of people but can be stopped if you follow the battery life thread that skipjacks started.
Sent from my SGH-M919
Click to expand...
Click to collapse
I do use that guide. My signal is terrible and is what drains my battery. I really don't believe that is related to any app running wild and draining my battery because from completely dead to 100% takes about 2.5-3 hours with me using it, WiFi on, brightness at 100%, etc; I can also easily get over 2 days without a charge with light use... It would be more but my lack of signal accounts for an almost 1.5% per hour idle drain. Good signal areas I'll drain less than .5% per hour with no use/app changes outside of having a strong signal.

Weird...
When your phone charges to 100%, your phone knows to stop charging, mine always stops charging when is says "reached 100%". I just leave it on the charger and it stays steady at 100 until i take it off.
It shouldn't effect the lithium ion, either.
I thought that was the special thing about lithium ion?
They don't wear down?
Idk, could be wrong.
Sent from my SPH-L720 using xda app-developers app

Overnight charging is a no no. More info here http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

I always leave it charging when I fall asleep. And if, IF I wake up in the middle of my sleep and see that it's at 100% I'll unplug it. If I don't wake-up I'll just leave it charging until I wake up. Been doing that since before I even had a smartphone and never had any problems. Then again I do switch phones every year
Sent from Flip's Galaxy S4

lordcheeto03 said:
I do use that guide. My signal is terrible and is what drains my battery. I really don't believe that is related to any app running wild and draining my battery because from completely dead to 100% takes about 2.5-3 hours with me using it, WiFi on, brightness at 100%, etc; I can also easily get over 2 days without a charge with light use... It would be more but my lack of signal accounts for an almost 1.5% per hour idle drain. Good signal areas I'll drain less than .5% per hour with no use/app changes outside of having a strong signal.
Click to expand...
Click to collapse
A bad signal will definitely drain your battery. When I know I am in an area without signal and will be there for a few hours I turn my phone's power off so I have some battery left when I need it.
Sent from my SGH-M919

I've always charged my phone at night and have never had usages with the battery.
Sent from my SGH-M919 using Tapatalk 2

Bought some cheap batteries on Amazon, I charge whenever I want, however I want (typically overnight, all night). If I ruin the battery, so be it, I can just pop it out and replace it in 5 seconds. This is the real advantage of having a removable battery.

I've always left my smartphones on the charger overnight. Seven years going and haven't had any issues. I do tend to replace my battery after 9-12 months of use though.
lordcheeto03 said:
I do it when I can't get a full charge before bed; but I also wake up 2-3 times per night and tend to unplug it once I notice it's at 100%. I've read that once it reaches 100%, if it stays on charge for a certain amount of time it will switch to battery and drain, then charge back to 100% after a certain percentage is drained. I would say that's the case as I woke up one morning and the phone was at 92% charge and was in the process of charging. Battery info said it was charging on AC and the graph showed it went to 100% then back down.
Click to expand...
Click to collapse
This sums it up. Per the article linked earlier in the thread about charging li-ion, it sounds (relatively) trivial for the device manufacturer to implement a charging cut-off after the cells reach a specific voltage level. Once the cells drop to a certain level they're safe to charge again, and the cycle starts over. I don't imagine it's great for the battery to sit on that recharge cycle, but it's not going to over-charge and become a fire hazard.
I imagine external battery chargers might be a little different. That $3 battery & charger from eBay isn't going to have the same safety regulations as a major manufacturer like Samsung.

norml said:
Overnight charging is a no no. More info here http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Click to expand...
Click to collapse
An interesting tidbit from that article.
Li-ion does not need to be fully charged, as is the case with lead acid, nor is it desirable to do so. In fact, it is better not to fully charge, because high voltages stresses the battery.
Click to expand...
Click to collapse

I'm pretty sure a $600 phone can handle any of your charging blunders. Relax kid.
We're not dealing with Nokia's anymore.
Sent from my SGH-M919 using xda app-developers app

Avoiding full charge has benefits, and some manufacturers set the charge threshold lower on purpose to prolong battery life.
Lithium-ion does not need to be fully charged; a partial charge is better.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

tikay00 said:
I'm pretty sure a $600 phone can handle any of your charging blunders. Relax kid.
We're not dealing with Nokia's anymore.
Sent from my SGH-M919 using xda app-developers app
Click to expand...
Click to collapse
All the other comments say not to charge over night...
Sent from my SGH-M919 using xda app-developers app

I charge mine overnight with no issues.
Sent from my TI-82 using XDA Premium

I just called Samsung and they highly recommend me to not charge it over night
Sent from my SGH-M919 using xda app-developers app

norml said:
Avoiding full charge has benefits, and some manufacturers set the charge threshold lower on purpose to prolong battery life.
Lithium-ion does not need to be fully charged; a partial charge is better.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Click to expand...
Click to collapse
I get the general concepts that the article presents, but it doesn't really address any advances in charging methodologies that newer devices could add. It reads like it was designed for 'dumb' devices such as cordless phones, rechargable power tools, etc. For instance, it says never to charge with the device powered on. Yet Windows Phones (at least my Lumia 800) won't charge with the device off...plugging it in automatically boots the phone up.
Our phones obviously have more advanced power circuitry, such as being able to hold the power button in and have the device power cycle no matter what state the phone is in, and I assume it applies to other parts of the phone as well.