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[Q] Battery charging maxxed out at 98% ??

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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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

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
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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®
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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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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...
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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.
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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.
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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.
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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.
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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!
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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.
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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.
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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

Phone dies at 5%

How can I calibrate my unrooted phone
Sent from my Nexus 6 using XDA Free mobile app

You can't. Even if you are rooted.
Run your battery all the way down until it shuts off. Charge, uninterrupted, until fully charged. Voila! Battery calibrated.
Battery calibrating apps/techniques have been useless for quite some time.

carlz28 said:
You can't. Even if you are rooted.
Run your battery all the way down until it shuts off. Charge, uninterrupted, until fully charged. Voila! Battery calibrated.
Battery calibrating apps/techniques have been useless for quite some time.
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My phone has gone through many charge and shutdown cycles and not even this has changed my 5% shutdown.

Have you tried leaving your phone plugged in after 100%? Let it trickle charge for an hour or two.
The battery 'calibration' stuff that people do is what android does automatically after getting to nearly full charge.
It hasn't been needed since gingerbread.

I have had this issue happen a few times, what I do is plug it in to turn it on , then try to run it down till 0 and then put it on charge while off till its 100% and leave it there for a few hours. Then after a few cycles, this occurs again. I dont charge in the middle, always charge at night until 100% and 30 minutes beyond that.

Battery percentage

I do not understand why the percentage of the battery as soon as I turn on the phone after a full charge immediately indicates 98% and not 100%, even if the display shows off the full charge as soon as I remove the charger.

It's probably because your 100% battery level is nearing on 99% and every reboot, based on my experience, more often than not consumes 1%, maybe more, hence, 98% battery left.

trxjam said:
I do not understand why the percentage of the battery as soon as I turn on the phone after a full charge immediately indicates 98% and not 100%, even if the display shows off the full charge as soon as I remove the charger.
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I'd suggest varying how you charge the phone; 1) with the phone on 2) with the phone off
My (albeit anecdotal) experience is that when charged with the phone on, and left on the charger longer than when it says 100%, it's doing a 'trickle' charge, which then seems to charge it completely. Again, anecdotal, but it seems to me that after charging it numerous times with it on, then when I charge it turned off it seems to do a *full* charge.
ymmv

maybe I explained myself badly. in the evening I put the phone off and off. In the morning as soon as I accrue it, instead of marking 100%, it will score 98% .If it is when I unplug it from the charger and it is still off and it is 100% .