The battery of my Nook Color (CM7 - build 128) does not charge over 50%.
The battery completely drained out (I probably left it on standby for 1 week) and now when I recharge it the charge level always stops exactly at 50% (shown on Spare Parts). I also noticed that when the charge level reaches 50%, the color of the 'n' symbol on the USB cable becomes green (maybe it thinks that 50% is now the maximum charge level?)
Can someone help?
Thanks!
If you have cwm installed, go to advanced option and reset battery stats. Then reboot and charge your nook. Looks like the complete drain might have screwed up the reporting on charge. I would recommend charging the nook while it is turned off and see if that fixes the problem.
Sent from my NookColor using Tapatalk
luigig said:
The battery of my Nook Color (CM7 - build 128) does not charge over 50%.
The battery completely drained out (I probably left it on standby for 1 week) and now when I recharge it the charge level always stops exactly at 50% (shown on Spare Parts). I also noticed that when the charge level reaches 50%, the color of the 'n' symbol on the USB cable becomes green (maybe it thinks that 50% is now the maximum charge level?)
Can someone help?
Thanks!
Click to expand...
Click to collapse
Are you using the B&N Nook Cable and charger?
khaytsus said:
Are you using the B&N Nook Cable and charger?
Click to expand...
Click to collapse
Yes, I am.
Moshe5368 said:
If you have cwm installed, go to advanced option and reset battery stats. Then reboot and charge your nook. Looks like the complete drain might have screwed up the reporting on charge. I would recommend charging the nook while it is turned off and see if that fixes the problem.
Click to expand...
Click to collapse
I do not have cwm installed. Is there another way to reset the battery stats?
I tried to charge the nook when it is off, but it automatically powers itself on anytime I connect the USB cable. I do not remember it behaving like this before.
luigig said:
Yes, I am.
Click to expand...
Click to collapse
Good. So i see you're using build 128, you might try updating that. I don't recall when some of the battery calibration problems were fixed.
One thing to be clear on is even if your NC is saying it's 50%, if the charger stops, the battery is full. The charging is independent of Android, so it's not like it's overcharging etc. Most likely it's a calibration issue.
Get up to date on CM7 and use the NC until it powers off on its own then plug it in and don't touch it. It will turn on by itself. Leave it alone until it's done charging, see where it is then.
Related
My 4-week old rooted NC (1.1 / Autonooter 3.0) has been plugged into the BN charger for a few hours. The battery level shows 98% yet the LED on the BN charger is green, strongly suffesting that that's as far as it's going to go.
I've not let my NC get much below 40% battery level without recharging.
Anyone else seeing this behaviour? I realize that rechargable batteries have a finite life span, but I'd sort of like my NC to last me a couple of years.
Perhaps I should let the battery get below 10% before recharging...
There is no such thing as memory effect. Discharging your battery is the worst thing you can do for it. If it says 98% is the most it can do, then your battery statistics need to be wiped. You can get a more accurate mapping of % to charge level by doing a full charge to discharge cycle, but this leads to premature battery death, and I do not recommend it.
See also http://batteryuniversity.com/
Thats normal, the charger operates in low-current mode and will keep charging till it gets 100%. Let it plugged for another 1 hour and you should see the 100% full charge then.
arda99 said:
Thats normal, the charger operates in low-current mode and will keep charging till it gets 100%. Let it plugged for another 1 hour and you should see the 100% full charge then.
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Click to collapse
You dear sir are correct, most devices have being doing that for awhile.
Even my pro2 and diamond would take 2 hours to get from 98% to100%.
Sent from my GT-I9000 using XDA Premium App
Today is a week since I've got my Nook and it's battery started to bother me.
When I fully charge my Nook and indicator shows 100% I unplug it and in a few seconds charge level drops to 99%, after this battery discharges in normal pace, Is it some kind of software glitch(I use Nookie Froyo 0.68), or in just a week Nook's battery started to loose capacity?
There was an issue whith a battery before. I had to connect my Nook to MacBookPro using generic microUSB to transfer some files and in about 10 seconds battery charge indicator jumped to 100%, could it be a reason for current battery behavior?
Is there some kind of fix available?
Thanks in advance.
Try charging til it turns green then edit about an hour. Boot into CWR and clear battery stats. Then unplug and see what happens.
Sent from my KaosFroyo V39 Eris using XDA App
EhudBenjamin said:
Try charging til it turns green then edit about an hour. Boot into CWR and clear battery stats. Then unplug and see what happens.
Sent from my KaosFroyo V39 Eris using XDA App
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Click to collapse
You can try that, but Correct me if I'm wrong but as soon as you unplug your nook and run from battery at the very Nano Second the Battery is no longer at 100% so the Indicator would be correct, seeing as it only does Whole %.
But really Ehudbenjamin's Answer is better, Its most likely just the stats the OS uses to track the usage that is mess up. or Maybe Android, uses a very Strict Battery usage policy when displaying %
Doesn't sound like something to be super worried over tho.
EhudBenjamin said:
Try charging til it turns green then edit about an hour. Boot into CWR and clear battery stats. Then unplug and see what happens.
Sent from my KaosFroyo V39 Eris using XDA App
Click to expand...
Click to collapse
Sorry, but I don't quite understand, what should I edit for an hour?
dalkor said:
Sorry, but I don't quite understand, what should I edit for an hour?
Click to expand...
Click to collapse
LoL, I'm Pretty sure he wanted to say "Wait" for a hour.
therealguppy said:
LoL, I'm Pretty sure he wanted to say "Wait" for a hour.
Click to expand...
Click to collapse
Yes, that was it, wait an hour.
Sent from my KaosFroyo V39 Eris using XDA App
dalkor said:
Today is a week since I've got my Nook and it's battery started to bother me.
When I fully charge my Nook and indicator shows 100% I unplug it and in a few seconds charge level drops to 99%, after this battery discharges in normal pace, Is it some kind of software glitch(I use Nookie Froyo 0.68), or in just a week Nook's battery started to loose capacity?
There was an issue whith a battery before. I had to connect my Nook to MacBookPro using generic microUSB to transfer some files and in about 10 seconds battery charge indicator jumped to 100%, could it be a reason for current battery behavior?
Is there some kind of fix available?
Thanks in advance.
Click to expand...
Click to collapse
Li-Ion batteries have a governor to prevent overcharging. When the battery reaches 100%, it stops charging; even if it remains plugged in. After a certain amount of discharge, the governor allows the battery to charge back to 100% again.
Depending on when you are when you unplug your device, you may see it remain at 100% for a longer or shorter period of time.
Thanks for the answers, but it actually didn't help. I just charged my nook from 10% to 100% and in a minute after I unplugged my charger, indicator showed 99%. As I noticed, charge percent is calculated based on battery voltage and it drops nearly immediately, when I unplug a charger.
Hi
Apologies if this has been posted before. I recently flashed my phone with gingerbread (JVK) and since then, the USB charging have been more then a little bit screwy.
Usually i have my phone plugged into my PC while i am work. At some point during the day i will get the message telling me that its finished charging. If i unplug it at this point the battery will instantly drop to between 70 and 80 percent, sometimes it goes as low as 50%!!!! If i plug the phone back in it will continue charging for a while and then i will get another message telling me that the battery is at 100%. If i unplug it then it still drops, but to a higher percentage. I am able to get the battery to 99% by plugging it in and unplugging it a number of times.
The odd thing is that if i charge it from mains, it goes to 100% and stays there the first time.
Any ideas?
somehow same issue for me for what ever gingerbread (jv1/jvk/jvb) i have use.
but mine is different, if i got it unplug immediately after it saids "full charged" it will shows 100%.
BUT if i leave the charger on after it saids "full charged" for another few more hrs say 6 hrs, after unplugging.. it will immediately drop to 90% or even less some time.
well for js5/7/8 don't have such issue, that means after i leave the charger plug for overnight even its already full charged, after unplugging it still shows 99-100% !
wondering if any jv1/k/b user encounting this same issue?
pennzoilgtr said:
somehow same issue for me for what ever gingerbread (jv1/jvk/jvb) i have use.
but mine is different, if i got it unplug immediately after it saids "full charged" it will shows 100%.
BUT if i leave the charger on after it saids "full charged" for another few more hrs say 6 hrs, after unplugging.. it will immediately drop to 90% or even less some time.
well for js5/7/8 don't have such issue, that means after i leave the charger plug for overnight even its already full charged, after unplugging it still shows 99-100% !
wondering if any jv1/k/b user encounting this same issue?
Click to expand...
Click to collapse
If you are rooted, then delete battery stats, shutdown your phone, and leave it on the charger till it is 100% full. Then leave in on the charger again, start your phone, and delete battery stats again. Reboot your phone, and you should be ok.
For the second part, in which your phone after fully charged and left on charger lost some percentage after unplugging, it seems that Gingerbread stops charging once battery is full, and do not continue, even if charger is plugged in, once it'll lost some power. Some older phones does this (S45 for example).
Out of curiosity, what kernel are you using?
Virnik0 said:
If you are rooted, then delete battery stats, shutdown your phone, and leave it on the charger till it is 100% full. Then leave in on the charger again, start your phone, and delete battery stats again. Reboot your phone, and you should be ok.
For the second part, in which your phone after fully charged and left on charger lost some percentage after unplugging, it seems that Gingerbread stops charging once battery is full, and do not continue, even if charger is plugged in, once it'll lost some power. Some older phones does this (S45 for example).
Out of curiosity, what kernel are you using?
Click to expand...
Click to collapse
ok, as for battery stats i did the wipe, but i did not shutdown and do a full charge
as for kernel i did not really try on stock kernel though, i started using jv's series with CF's kernel or supercurio's hacked kernel.
maybe you are right that gingerbread stop charging after the battery is fully charged, but to my understanding i thought that is supposed it run on a/c once its fully charged? leaving the battery disconnect until you unplug it and it will starts to use the battery.
for froyo wise i presume it runs on a/c while leaving the battery disconnected, after overnight of full charged the phone is cool and don't feel like the battery is still "charging" after it reaches 100%
I had this problem too when i was with xxjvk. batterystats.bin was always automatically deleted by system once charger was connect/disconnect (couldnt remember...).
if the charger was unplugged right after fully charged notification, the phone worked perfectly fine and battery life was much better than with xsjw8..
Sent from my GT-I9000
rinl said:
I had this problem too when i was with xxjvk. batterystats.bin was always automatically deleted by system once charger was connect/disconnect (couldnt remember...).
if the charger was unplugged right after fully charged notification, the phone worked perfectly fine and battery life was much better than with xsjw8..
Sent from my GT-I9000
Click to expand...
Click to collapse
And do you suffer battery drops after unplugging from already full charged for few hours?
Sent from my GT-I9000 using XDA App
pennzoilgtr said:
And do you suffer battery drops after unplugging from already full charged for few hours?
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
yes, indeed.
Actually, i have mentioned in this thread before...
http://forum.xda-developers.com/showpost.php?p=12950876&postcount=6
rinl said:
yes, indeed.
Actually, i have mentioned in this thread before...
http://forum.xda-developers.com/showpost.php?p=12950876&postcount=6
Click to expand...
Click to collapse
Ok seems like jvb doesn't solve the issue... I'm on goatrips's jvb at the moment. I got the make sure that I unplug immediately after it said full charged otherwise the percentage would drop like 10-20% if I leave it connected overnight.
Wondering how come there is so many jvk/jvb tester/users around but seems no one mention about it.
Sent from my GT-I9000 using XDA App
Virnik0 said:
If you are rooted, then delete battery stats, shutdown your phone, and leave it on the charger till it is 100% full. Then leave in on the charger again, start your phone, and delete battery stats again. Reboot your phone, and you should be ok.
For the second part, in which your phone after fully charged and left on charger lost some percentage after unplugging, it seems that Gingerbread stops charging once battery is full, and do not continue, even if charger is plugged in, once it'll lost some power. Some older phones does this (S45 for example).
Out of curiosity, what kernel are you using?
Click to expand...
Click to collapse
Thanks for your reply but i have already tried this.
It also does not explain why it is fine charging from mains but not USB.
Notice that. Not sure whether its a bug. When it finishes charging, the sgs operate naturally and doesn't preserve the battery like it use to in the previous fw. So it drops immediately as the phone is disconnected. If the screen is left on during charging, it is a problem...
Sent from my GT-I9000 using XDA Premium App
Anything ever come out of this? I'm using Serendipity VII for Cappy based of jvb. I'm seeing this regardless of the type charger I use. Once it hits 100%, the battery continues to show 100% until I remove the charger. Then it shows what I assume is the amount of battery left after powering the phone from the point it reached a full charge to the present. If I remove it immediately after full charge is reached, it reflects that. If I leave it on the charger for hours, it immediately drops reflecting the time spent since full charge.
Sent from my SGH-I897 using XDA
I am not new to the phone and I have done battery calibrations many times. I used MIUI for a long time, then went to Pinnacle 1.1. After a few weeks one night after fully charging, I unplugged the charger and it dropped to 70% instantly. I could then plug the charger back in and it will not move from 70% for a while, then it will register 'fully charged'. Removal of the charger again will make it drop to 70%. Turning off the device and charging will show the green battery about 2/3 full, but not registering full. I then went back to MIUI thinking it was a rom flaw, but this problem has persisted. I am right now charging on stock JF6 with the same results. If this is indicative of a defective battery, has anyone seen this before? The battery is 14 months old.
TL;DR - It seems that the battery wont charge past 70% regardless of ROM/Kernel.
I had a similar problem but it was because I wasn't using the charger that comes with the phone switched chargers problem was solved.
Sent from my I897 using xda premium
Have u tried draing ur battery, use tge battery till tge phone switches of on its own and then recharge it while the phone is off.
Sent From Infuse®
mrjay711 said:
I had a similar problem but it was because I wasn't using the charger that comes with the phone switched chargers problem was solved.
Sent from my I897 using xda premium
Click to expand...
Click to collapse
I am using the charger that came with the phone. Also tried a blackberry charger as well as usb charging it.
rkkaranrk said:
Have u tried draing ur battery, use tge battery till tge phone switches of on its own and then recharge it while the phone is off.
Sent From Infuse®
Click to expand...
Click to collapse
I drained the battery last night, and then charged while off fully. The green battery icon went to 100%, and as soon as I turned it on it said 73%.
You might want to check into getting a new battery I got a extended battery for 10$ you can probably find the original sized battery for about the same price if you look around.
Sent from my I897 using xda premium
Google "bump charging". I had a similar issue when I was on serendipity vii, it would charge to full, but as soon as I unplugged it would drop to 80%. I bump charged, then calibrated. All was well after that.
Sent from my SAMSUNG-SGH-I897 using XDA App
phrix626 said:
Google "bump charging". I had a similar issue when I was on serendipity vii, it would charge to full, but as soon as I unplugged it would drop to 80%. I bump charged, then calibrated. All was well after that.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
Tried that. It hangs at about the 2/3 full level on the large green battery icon when the phone is charging off so I really can't do a proper bump charge.
I think I am going to resign to it being a battery past its prime...
New batteries are fairly cheap, plus I've heard that if you even mention faulty battery to at&t they ship you a new one for free...
studacris said:
New batteries are fairly cheap, plus I've heard that if you even mention faulty battery to at&t they ship you a new one for free...
Click to expand...
Click to collapse
I find that hard to believe, but it can't hurt to try!
Sounds like you need a battery calibration..
1. discharge completely
2. plug into a USB port on the computer for a slow charge up to 100% (overnight while "off")
3. unplug the device and turn it on
4. if you have a ROM with CWM installed, clear the battery stats at this time.
5. plug it into usb until it's charged to 100% (while on)
6. unplug the device and turn it off
7. plug in into usb again until its charged to 100%(while "off")
8. turn it on and use it as normal
This will allow the device to relearn it's battery charging characteristics. This is the battery calibration.
AdamOutler said:
Sounds like you need a battery calibration..
1. discharge completely
2. plug into a USB port on the computer for a slow charge up to 100% (overnight while "off")
3. unplug the device and turn it on
4. if you have a ROM with CWM installed, clear the battery stats at this time.
5. plug it into usb until it's charged to 100% (while on)
6. unplug the device and turn it off
7. plug in into usb again until its charged to 100%(while "off")
8. turn it on and use it as normal
This will allow the device to relearn it's battery charging characteristics. This is the battery calibration.
Click to expand...
Click to collapse
In stages 2 or 5 it never reaches 100%.
I am going to try a coworkers battery tomorrow at full charge. That should settle it.
orlandoxpolice said:
In stages 2 or 5 it never reaches 100%.
I am going to try a coworkers battery tomorrow at full charge. That should settle it.
Click to expand...
Click to collapse
You are not leaving it long enough. It will reach 100% once it charges what it believes is 30% more. It must be off and you must clear the Batt stats.
Once it stops charging it marks that as fully charged. Your battery needs calibration.
AdamOutler said:
You are not leaving it long enough. It will reach 100% once it charges what it believes is 30% more. It must be off and you must clear the Batt stats.
Click to expand...
Click to collapse
I left it off and plugged in overnight and it never reached 100%, but I will give it a shot again this weekend.
AdamOutler said:
Once it stops charging it marks that as fully charged. Your battery needs calibration.
Click to expand...
Click to collapse
You are right.
I did a small test with a coworkers battery today.
His battery in his phone - 88%
His battery in my phone - 58%
Leaves a delta of 30% which is exactly why mine stops charging at 70%.
It has gotten to 100% while off charging in the green. I then booted to CWM recovery and wiped battery stats, but it turns on at 70% again. It is almost like it isn't deleting the file.
orlandoxpolice said:
I find that hard to believe, but it can't hurt to try!
Click to expand...
Click to collapse
It's true, go to your nearest AT&T store and tell them about your issue and they'll take your information (name, address etc...) and ship you a brand new OEM (Samsung) battery no questions asked. No idea why they don't just hand you one on the spot, but it only takes a few days to get to you anyways.
orlandoxpolice said:
You are right.
I did a small test with a coworkers battery today.
His battery in his phone - 88%
His battery in my phone - 58%
Leaves a delta of 30% which is exactly why mine stops charging at 70%.
It has gotten to 100% while off charging in the green. I then booted to CWM recovery and wiped battery stats, but it turns on at 70% again. It is almost like it isn't deleting the file.
Click to expand...
Click to collapse
did you finish the procedure I mentioned? There is a calibration procedure. It involves turning it on and off several times and plugging it in an unplugging it several times.
AdamOutler said:
did you finish the procedure I mentioned? There is a calibration procedure. It involves turning it on and off several times and plugging it in an unplugging it several times.
Click to expand...
Click to collapse
I followed the calibration instructions perfectly. I have done it quite often actually. Didn't work. It acts as if CWM isn't actually deleting the file.
Deleted batterystats.bin via a terminal emulator and still no luck.
hopeless
Hello, I've had my NC for a year this month and never had any major issues. I installed manualnooter 4.6.16a when nook was updated to 1.3.0 some time ago and all was great in the NC world. Recently I noticed that my battery is stuck @ 29% no matter what! I never charge via usb thru the computer always plugged in a wall socket. I dld batt solo widget, and many other battery widgets just to make sure, and of course they all say 29%.
Here's the thing, the n on the cord is green which usually mean its fully charged. I used it til it died, plugged it back in to recharge two days and the % is the same. I went ahead and wiped it, updated it back to 1.3.0 stock and you guessed it, it still says 29%. What do you think the problem is, please help.
The problem may be that your charge cable no longer works with an AC source. I know it sounds far fetched, but mine would not charge above 33% with the cable that came with it, but once I used my cable I use in my car it started charging fast again, and is now charging to 100%.
Download the battery monitor widget and it will tell you if your cable is charging AC or USB.USB charge is very weak vs AC. Try recalibrating your battery either with an app (I use nemas version) or do it under advanced in recovery. Assuming you are rooted.
Ian
Sent from space
ianPhillips1 said:
Download the battery monitor widget and it will tell you if your cable is charging AC or USB.USB charge is very weak vs AC. Try recalibrating your battery either with an app (I use nemas version) or do it under advanced in recovery. Assuming you are rooted.
Ian
Sent from space
Click to expand...
Click to collapse
Assuming he is having the same problem as I did, The nook just stops charging, and will not charge any higher than whatever percentage it stops at. The only thing that worked for me was using a new Nook Color Cable. Just an odd bit of wonkiness.
ianPhillips1 said:
Download the battery monitor widget and it will tell you if your cable is charging AC or USB.USB charge is very weak vs AC. Try recalibrating your battery either with an app (I use nemas version) or do it under advanced in recovery. Assuming you are rooted.
Ian
Sent from space
Click to expand...
Click to collapse
Also, boot into clockworkmod and clear your battery stats. You're battery should be right around 4200mv fully charged (Spare Parts on CM7 can tell you this). Sounds like you just have an issue where its not recognizing full charged as fully charged.