Database Develop

Nook battery health question.

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
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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.

Battery 98%

When I charge my phone and it says the battery is full and 100%, but after I unplug the charger, I only get 98% of battery. It is not really a problem but i'm just wondering if anyone else has this also.
Sent from my LG-P970 using XDA App

Seems to be phone battery calibration, happens to me too. Try not to unplug the charger immediately after 100%, let it overcharge for few minutes more.
Sent from my LG-P970 using Tapatalk

Also happening to me... It's because battery calibration...

This is the normal behavior of overcharge protection.
imagine you battery is charged till 100%, the overcharge protection now disable charging till the battery is loosing a few % of its charge, but the "battery memory" doesnt recognize this respectively doesnt refresh its state so your battery indicator will always show 100% until you unplug the phone.
if you unplug the phone at 100% it might be, that the battery memory is refreshing after loosing one more % of charge and now recognize, thats it wasnt at 100% at all and show you the current charge.
e.g. if you charge your phone when its off-state, this behavior shouldnt take place and the phone should charge till exactly 100%. important for recalibrating the battery.

Here, if you have root use this
https://market.android.com/details?id=com.liteup.calibratebattery
You can also load up clockwork recovery anf clear battery stats.
If no root access, fo the following.
1.Power on let fully charge
2.turn phone off while still plugged in
3. Remove battery and power cord and push power button for 5 secs
4. Replace battery amd power cord
5. Let fully charge again.
Once charged, power up while pluged in, once phone is fully loaded un plug and monitor battery,
None root battery calibration should be finished.
Sent from my PC36100 using xda premium

When it happens to me... I inmediatly replug the charger and wait... the second time I umplug I get 100% and It seems to repair the issue for the future charges.

i noticed this too! sometimes i do get 100% after charging. But most of the times its 98% immediately after unplug! And i have my battery calibrated too!:/

same issue

any solution for this guys?. I've calibrated my battery so many times and it is not fixing the 98% charge when unpluggin

mine's not...
try screen-on charging...
go to settings>deveLopment>check stay awake(charging)
if you're in Gingerbread version (2.3.4) when battery reached 99%, you"LL need to wait 1 more hour to make it fuLLy charged...
that's it!
tried and tested by most android users...
just charge it without using to avoid excessive heat of your device... :good:

What about first time using battery? Charge the battery 100% first or let it drain to 0% then fully charge?
I bought 2400mah battery, but cant get significant performance, fully charged first time use..

I think you were ripped off.
we will miss you Nicholas.... /s

If your going to buy an aftermarket battery. You get what you pay for. I ordered a mugen 1800mah delivered in 4 days from Hong Kong. My synopsis Bloody brilliant!
Waiting for my Jiayu g2s to be delivered

[Q] Help. Battery will not charge more than 70%

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
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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

[Q] Battery Issue? OS WISE?

Guys.
Am on ICS THS B16 with ICY GLITCH 14 B5 kernel..
I found this few mins back on my Cappy..
I had around 30% charge in my cappy and when i plugged in, i felt the warm on the back door while its charging.. It took around 1 1/2 hrs to Reach 80%..
Now When the device showed 90%, the back door is so chill cos of my climate here.. but still its charging...
Is it Normal?
Or The Charging thingi stopped in the OS and showing fake %???

What's the issue exactly? It's normal for a phone to get hot while charging
Sent from my CM9 ICS i897 Captivate

The issue is that.
As you said The device gets hotter while in charger...
But here it does not when its at 90% and it does till 89%

Oh wait, I think I read this somewhere. I vaguely remember reading that the battery will fast-charge until it reaches a certain threshold (like 80% or possibly 90%?), where it begins to trickle charge so it doesn't overcharge or something. I could be completely wrong; I might be referencing something completely different but maybe it's somehow relevant. Either way, I really wouldn't worry about your charging temperature unless it's getting really, REALLY hot.

Is this when using an outlet to charge the phone or a usb port on your computer? I've noticed different charge speed between the two.
I've also capped my charging at 90% because I've heard that charging to 100% isn't great for long-term battery life.

korockinout13 said:
Oh wait, I think I read this somewhere. I vaguely remember reading that the battery will fast-charge until it reaches a certain threshold (like 80% or possibly 90%?), where it begins to trickle charge so it doesn't overcharge or something. I could be completely wrong; I might be referencing something completely different but maybe it's somehow relevant. Either way, I really wouldn't worry about your charging temperature unless it's getting really, REALLY hot.
Click to expand...
Click to collapse
This is the exact reason. Li-Ion batteries can be damaged by keeping them at 100% charge or letting them get down to nearly 0% charge, so when batteries get to 90% they'll trickle charge. This is a normal safety procedure and all phones do it in some way or another - some phones will charge to 100% and then discharge slightly to hold at 90-95%
This is also why you should:
1. NEVER EVER let your battery go down to 0%
2. NEVER EVER use the charge to 100% - unplug, re-calibrate cycle to bypass this safety system that people post on here on a semi regular basis.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

Phone is hot while plugged in and @ 100%

While at work, I leave my phone plugged in and charged at all times.
I don't have exact temperatures but I've noticed that it is warm the whole time. Anyone else notice this?

blazinazn said:
While at work, I leave my phone plugged in and charged at all times.
I don't have exact temperatures but I've noticed that it is warm the whole time. Anyone else notice this?
Click to expand...
Click to collapse
Are you using the official charger?
Some aftermarket USB C cables can damage your phone or even fry it completely.
If you are using a standard charger, I'm more inclined to say your phone is getting warm because the battery has been charging. If you have hotspot on, that can warm your phone up quite alot too... Basically the more your phone is doing the hotter it can get (Bluetooth/wifi/hotspot etc)
FYI: charging to 80/90% will make your battery last alot longer too, if you plan on keeping it a few years. Charging to 100% is the fastest way to degrade your li-ion battery.
If you are rooted you can limit your charge to 90% but depends if you don't have access to a charger all day you might need that 100%.
Hope that helps.

Demolition49 said:
Are you using the official charger?
Some aftermarket USB C cables can damage your phone or even fry it completely.
If you are using a standard charger, I'm more inclined to say your phone is getting warm because the battery has been charging. If you have hotspot on, that can warm your phone up quite alot too... Basically the more your phone is doing the hotter it can get (Bluetooth/wifi/hotspot etc)
FYI: charging to 80/90% will make your battery last alot longer too, if you plan on keeping it a few years. Charging to 100% is the fastest way to degrade your li-ion battery.
If you are rooted you can limit your charge to 90% but depends if you don't have access to a charger all day you might need that 100%.
Hope that helps.
Click to expand...
Click to collapse
Yes, using the official charger. I also failed to mention that I have a case on my phone. Not sure if that is contributing to it.
Is it because charging to 100% counts as a full cycle? I will admit that I'm not up to snuff on battery tech and what the best way to preserve the battery long term. From my past understanding, if you take your battery all the way down and then charge it to 100%, then that was a full cycle. More cycles = degraded battery over time.
Not sure if this still holds true for li-ion batteries today.
Edit: My thought here is to leave it on the charger whenever I can, thus minimizing the cycles I put on the battery.

blazinazn said:
While at work, I leave my phone plugged in and charged at all times.
I don't have exact temperatures but I've noticed that it is warm the whole time. Anyone else notice this?
Click to expand...
Click to collapse
blazinazn said:
Yes, using the official charger. I also failed to mention that I have a case on my phone. Not sure if that is contributing to it.
Is it because charging to 100% counts as a full cycle? I will admit that I'm not up to snuff on battery tech and what the best way to preserve the battery long term. From my past understanding, if you take your battery all the way down and then charge it to 100%, then that was a full cycle. More cycles = degraded battery over time.
Not sure if this still holds true for li-ion batteries today.
Edit: My thought here is to leave it on the charger whenever I can, thus minimizing the cycles I put on the battery.
Click to expand...
Click to collapse
My suggestion is download accubattery, it will tell you your battery temperature and also it calculates the degredation and health of your battery. It will also explain how many cycles of wear you are adding to the phone.
Back in the old days with nickel cadimium batteries you needed to do the whole 0-100 thing, that was good for battery memory... But modern day lithium batteries actually are better being topped off and kept between 20-80% in an ideal world. So deep discharges and high % charges wear out your battery significantly faster... This is why electric cars often limit charge, by doing this they can extend the life of the battery cells quite dramatically.... but if you are upgrading yearly, don't worry about it.
Here is an article that will help you.
EDIT: try charging with and without the case and see if it gets hot, definitely cases can be an insulator. You can monitor temp in accubattery.
https://www.wired.co.uk/article/how-to-improve-battery-life-tips-myths-smartphones

The idea that there is a set number of charging cycles for a particular battery, and every time you charge the phone you use up one of those cycles regardless of how much it charges (ie a 10% charge and a 100% charge both use one charging cycle) isn't how modern cell phone batteries work.
As noted, it is best to not charge your phone to 100%, nor do you want to discharge your battery to 0%. It is best to charge it more frequently for a smaller amount of charge each time as well. So charging a phone 10% ten times is better for the better than charging the battery once for 100%.
Heat is also a huge problem with batteries and the hotter a battery gets, the shorter life expectancy it will have. So definitely look into the issue.
If rooted, there are a couple of Magisk modules that control charging. They usually will automatically pause charging if the battery gets too high of a temp. Once a preset time has passed, it will restore charging again. The idea being that the pause in charging will allow the battery temps to drop. You can also limit the battery max charge to another value other than 100% if you want. 80% max charge is suppose to be the sweet spot for battery longevity, but anything less than 100% is going to add life to your battery.

Just so you know the phone does not charge to 100% or allow you to discharge the battery completely. Your phone just shows that you are at 100% when charged as much as allowed and discharged as much as allowed when you reach 0% charge. The partial charge thing no longer has much of any effect since the phone is doing it for you already but the internet hasn't' caught up to that yet. These chargers do stop charging at full and your phone should not be warm if it's charged but unused. So... are you using while on the charger? That's not a great idea because it's going to kick it into charge over and over. The fellow above was correct about using proper cables, I'm not sure that's much of a problem anymore but there still may be some ringers on Amazon and elsewhere. You could also have something discharging the battery enough to get it to charge continuously or close enough to it to warm the phone up over time, a wake lock can do it for example. Those can keep the phone on charge enough to warm it up.
In general with charging it's going to be best to keep your charging and total cycles down because capacity loss during charging is a real issue due to physical deterioration and transfer of materials in the battery caused during the charge. You would be better served by allowing it to discharge at least somewhat and only charging as needed rather than keeping it plugged in. Since you're at work it should be fairly easy to plan your charging so that you'll be able to get through the day without the constant charge. Not saying wait until it dies and then charge, that would be inconvenient, just that you would get more life if you reduced your charge cycles.
No matter what your phone is getting warm something needs to be addressed if it's doing so when not used but plugged in. The charger should stop for long periods and the phone should be cool after the charge completes.