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[Q] Phone off battery indicator never reaches 100%?

I decided to try resetting the battery stats, charged the phone to 100%, then turned off the phone and plugged in the charger and now the green battery icon looks like it is about 90% full, but never goes to 100% (I've left it plugged in for 3 hours since). Any ideas?
Update: Full discharge and recharge seems to have done the trick!

Let the battery drain to zero. Plug in for a min then unplug to see where its at. If its at 1% charge it back to full and reset stats again...if it says something weird like 12% or more or less let it drain and die again until its at 1% then recharge and reset stats. Then let die completely before recharging
Sent from my SAMSUNG-SGH-I897 using XDA App

Smallsmx3 said:
Let the battery drain to zero. Plug in for a min then unplug to see where its at. If its at 1% charge it back to full and reset stats again...if it says something weird like 12% or more or less let it drain and die again until its at 1% then recharge and reset stats. Then let die completely before recharging
Sent from my SAMSUNG-SGH-I897 using XDA App
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Will try and and report back - thanks for the suggestion!

I've found that my phone won't charge all the way unless I'm using the wall charger or car charger that I got with the phone I had tried using a charger from one of my old phone's and it actually made the phone go into sync mode and still didn't charge it all the way sometimes even when it's plugged into the computer it wont charge all the way
Sent from my SAMSUNG-SGH-I897 using XDA App

govgeek said:
Will try and and report back - thanks for the suggestion!
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Also try using the phone heavily and discharge it

anker battery and battery stats

Hello and good weekend all!
I received a week ago an 1900 anker battery. After I charged it till 100% + about two hours I wiped battery stats and till now already did more than 5 full charge cycles but still when I reboot my phone the precentage drops about 10% (every cycle)
Sent from my HTC Sensation Z710e using XDA App

anyone? =\

Rebooting always drain the battery sometimes by a lot more than 10 %. Powering off and then turning on the phone again has a lesser impact in the battery.
Sent from my Kindle Fire using Tapatalk

the problem is that because of this my phone shuts down suddenly instead of regular "shutting down" process

[Q] how do you calibrate battery?

I'm reading some guides and posts about battery calibration...
I'm trying to do it with battery calibration apk, but I can't understand when battery is really full even if I use current widget (it stucks at 10mv, it does not come down to 0).
how do you calibrate?

Do wipe status as long as u riched this value as a maximum. .. restart. .. let it with out charging till it gets to 1% then charge it again till 100% do that a couple of times ur battery should be calibrated for good; )
Sent from my HTC Sensation XE with Beats Audio Z715e using xda premium

To know when its fully charged you need to be watching ma not mv. As ma is the flow of electricity that your battery is currently receiving, as long as your phone is on it will not hit 0 as your phone will still be consuming battery so it will always sit between 10 and 20ma when fully charged. As long as your happy its sat around that mark for a few minutes then its charged. But best way to calibrate in my opinion, is to just discharge to 5% and charge overnight. Wiping battery stats does nothing as your phone creates a new battery stats file on its own after every full charge and battery stats.bin only contains information of what's been using your battery like in the settings menu. This has been confirmed on xda portal by a Google software engineer.
Your phone is clever enough to figure out what charge your battery has by measuring amps and volts once its been discharged and charged a couple times as by then it will have a established the minimum and maximum mv your battery can hold and battery stats file does not hold this information.
Sent from my HTC Sensation using xda premium

Is it safe to charge the battery overnight?

Is it safe to charge the battery overnight?
I mean, charging more than 100%, charging over the 3-4 hours needed, charging for 7-8 hours..

I think it won't effect it cuz i charge my phone from overnight too.nothing happens.

when battery gets full it stops charging after that

Of course
I've been doing that for a year.
Usually my battery reaches 10% at the end of the day, then I just leave it charging over night.

Thanks, i've been doing it since I bought the phone but I've never really cared until now..

Do you guys turn off the phone before charging overnight?

No. I don't know how does it affect the quality/capacity of battery though!
I remember as a kid I had those RC-cars and there were always warnings about how it will 'destroy' the battery if it is charged for too long. lol.
I don't have any battery problems.
Just make sure your LED isn't turned on!
I once forgot it on overnight...
It's a little dimmer now. :c

They said once it reachs 100% to stop charging. It can have an negative impact on your battery. Lithium technology or not. But I do it too. I think it just shorten the life span on a slow scale.
Sent from my Galaxy Nexus using XDA Premium 4 mobile app

info[]box1 said:
They said once it reachs 100% to stop charging. It can have an negative impact on your battery. Lithium technology or not. But I do it too. I think it just shorten the life span on a slow scale.
Sent from my Galaxy Nexus using XDA Premium 4 mobile app
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Here is the thing...
Yes the phone has a voltage shut off when it reached 100%.
However, it will start to drain battery immediately once it cuts off charging. Even when idle with teh screen off it uses some power. And once it drops to 99% it will start charging again until it reached 100%.
Depending on your set up and how much the phone runs when idle it would keep 'topping off' the battery several times overnight. This is harsh on the battery.
So it's not like once it cuts off charging it stays off until it's unplugged and replugged in. It'll keep charging everytime it drops to 99%

Read this.
http://www.strumerjohn.com/apps/blog/show/32094931-how-your-smartphone-battery-works
Sent from my 16GB Blue Verizon Galaxy S3 running MIUI v5 with KT kernel

[Q] does energy bypass batery when full charged?

Here is the full question: Does modern smartphones protect the battery making energy bypass baterry when it is full charged? (like most laptops do)
This is related to: is it bad to keep my phone plugged to the wall charged for 15 hours? is it true that doing this makes the baterry go 100%-99%-100% and it "drains" battery's life taking cycles?
Is this the same for all devices? I have a Samsung Galaxy S Advance (i9070)
Thanks!
EDIT: MODS, feel free to delete, i couldn't because there is not such option! I posted this in the wrong sections.
thanks.

The charging circuit lowers the charge to a trickle, to keep battery charged.
I find I can get an hour or two more phone time if I keep charging after it says 100%.
If every thing is working right you shouldn't damage the phone or battery.
Sent from my XT897 using XDA Premium 4 mobile app

Subscribed to this thread as I am very interested in the answer myself.

It is float charging at that point. Battery levels are determined by the battery's voltage. A fully charged lithium ion battery sits at about 4.2 volts while a nearly drained one would sit at about 3.3 volts. This is how your phone knows when to stop charging the battery. So when it gets to the highest point, it stops and lets it trickle out a bit. Then when a little bit of energy has bled off, the charging circuitry kicks back on until it reaches the threshold again. Then the process repeats. It does this to maintain a healthy battery level without overcharging. Hope this helped
Sent from my SGH-M919 using xda app-developers app

PainTrane117 said:
It is float charging at that point. Battery levels are determined by the battery's voltage. A fully charged lithium ion battery sits at about 4.2 volts while a nearly drained one would sit at about 3.3 volts. This is how your phone knows when to stop charging the battery. So when it gets to the highest point, it stops and lets it trickle out a bit. Then when a little bit of energy has bled off, the charging circuitry kicks back on until it reaches the threshold again. Then the process repeats. It does this to maintain a healthy battery level without overcharging. Hope this helped
Sent from my SGH-M919 using xda app-developers app
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Thanks for the information. Its very informative. :good:
Will constantly charging a phone result in reduced battery life?

Constantly charging a phone will not affect battery life because it's just float charging. Float charging keeps batteries charged but not too charged, drained but not too drained. Of course lithium ion batteries will just eventually wear out because they're good for about 300-400 full charge and discharge cycles. But that's FULL charging and discharging. If it's float charging, the battery will stay good for years.
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