Battery not showing 100% charged - Galaxy Tab 7.7 General

So I have noticed that the battery on the tab does not show fully 100% charged. Every time I charge the tab overnight and I bring up the notification bar the battery only shows 99% charged, this is as soon as I unplug the charger. The tab can not loose 1% charge in the second it takes to disconnect it. I have noticed that this also happens with the original tab and no one could figure out why. What is the deal with this?
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Yeah, I've noticed as well, but dont care too much
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Because as soon as it loses 1/1000th of a percent, it is no longer 100% charged. So it shows 99%. That's just the way it is.

The info you so desire can be found somewhere here

Masterface7 said:
The info you so desire can be found somewhere here
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So its common and not an issue but still annoying nonetheless
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Related

Charging percentage

Hello. Last two times I have had a very wrong percentage showing on the lock screen when charging my tablet. Yesterday my lockscreen showed 19% with the charger attached. When I unplugged it my tablet jumped to 98%. Anyone else having this behavior when charging? My tablet is updated with 1.139.05_COM_GEN1.
Sent from my A500 using XDA Premium App
I think I've seen similar behaviour once, don't remember the numbers but before unplugging the battery % was low, and after unplugging it jumped to full.
As far as I know, when you plug in the charger and screen off the machine. After charging for some times, when you turn on the screen, you need to wait a 'certain period of time' to let the tablet refresh the correct battery % & display to you.
Agree, I think everyone have the same problem. The most accurate is the light indicator of power button. Red mean charging and white mean full charged. Sometime white light indicator but logon screen show charging with percentage. It's because it haven't update yet.
Sent from my A500 using XDA Premium App
Nice that I'm not alone. I will wait and see if it changes after coming updates.
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Same problem here!
Sent from my XT720 using XDA App
Is there a fix for this....this very annoying...!
Sent from my XT720 using XDA App

Battery issue still in 2.3.4

I left my phone on charge all night, I just woke up, un plugged it and it's gone down 3% in just a few minutes... Going to let the battery completely fire today.
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FACE PALM -.-'
Battery never (NEVER) charge up to 100%. Read about it in STICKY POSTS -.-'
That's okay, we've already had this topic a few times.
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oxfordmark said:
I left my phone on charge all night, I just woke up, un plugged it and it's gone down 3% in just a few minutes... Going to let the battery completely fire today.
Sent from my GT-I9000 using XDA App
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I think you should remove the theme that gives you battery percentage values and go out enjoy the sunshine...
use search please...

Fully charged battery drops from 4194mV to 4124mV when unplugged

Hi,
I have Bell stock 2.3.4 on my atrix. I noticed that my fully charged battery drops from 4194mV to 4124mV incidently when I unplug my phone. It still says 100% though… I have been using Battery Calibration app from the market. Is this normal?
Yeah, don't worry about it
Sent from my MB860 using XDA App
Nothing to worry about. Basically the charger was keeping the phone fully charged and when you unplugged it the phone started using the battery.
my phone does that too.. except it doesnt stay at 100%. it immediately goes to 99% right after i unplug it.
cachookaman said:
my phone does that too.. except it doesnt stay at 100%. it immediately goes to 99% right after i unplug it.
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That's a mechanism the phone has that prevents overcharging, it's actually a good thing.
janggu said:
Hi,
I have Bell stock 2.3.4 on my atrix. I noticed that my fully charged battery drops from 4194mV to 4124mV incidently when I unplug my phone. It still says 100% though… I have been using Battery Calibration app from the market. Is this normal?
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Click to collapse
Yeah, it is normal. My AT&T Atrix drops to 4169mV from 4200mV when unplugged.
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And I thought it was battery drain

After flashing Ics my battery couldn't seem to stay high so one day, I took the liberty of finishing the battery and...
THIS IS THE PURFECT EXAMPLE OF WROMG BATTERY INFO C:
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LOL XD
This pic is just soooooo funny. I have no clue why but looking at that makes me laugh XD
very very wrong battery readings.....
happens lots of times after flashing.....weirdest thing that was happening to me was battery rapidly falling from 50 to 30% and than slowly growing to 40%.....
Sent from my GT-I9300 using xda app-developers app
what kernel are you using? if it the devilkernel in the advanced options do wipe battery stats
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Lol
Sometimes battery stats behave strange
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gaspernemec said:
happens lots of times after flashing.....weirdest thing that was happening to me was battery rapidly falling from 50 to 30% and than slowly growing to 40%.....
Sent from my GT-I9300 using xda app-developers app
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Yes, I have to agree. This has also happened to me. I have actually had this happened when I turned my phone off one day. Before turning it off it had 60% battery, after a minute I turned it on and it said 20% battery. Also, has it happened to you that you charge it leave a couple of hours and when you unplug it rapidly falls to 70% or less? LOL! But it is nothing a full charge and batterystats.bin wipe wont fix.
Marcxd2214 said:
what kernel are you using? if it the devilkernel in the advanced options do wipe battery stats
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Wiping battery starts has nothing to do with reported battery percentage. Similar results can be obtained by setting your phone face up on the coffee table, watching any random show on tv, and doing Zumba for 30 minutes. In other words... none.
Battery stats, which is only a list of the apps that have put a demand on the battery, is already cleared each and every time the os is rebooted
Sent from my Galaxy Nexus using Tapatalk 2
Strange
Yea, it happen to mine too after ICS 4.0.3 upgrade, does anyone can help?
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jessietwf said:
Yea, it happen to mine too after ICS 4.0.3 upgrade, does anyone can help?
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Click to collapse
This is what I have read on the XDA forums and it has worked for me.
Completely charge your phone to 100% (Full battery charge) without unplugging. Once it is charged, without unplugging it, reboot to recovery and wipe battery stats in the ADVANCED section. As soon as your wipe it, very quickly unplug the phone. (as fast as possible). Once you do this, reboot your phone and completely drain it to until it turns off and you cannot turn it back on unless is plugged. Once it is drained charge it completely full withot unpluggin it or turning it on.(Best time to do this is at night, since you are probably not going to use it while you sleep). After that just use it daily. You have to give it a couple of days so the battery syncs up. Hope I helped out!
Supermannypr said:
This is what I have read on the XDA forums and it has worked for me.
Completely charge your phone to 100% (Full battery charge) without unplugging. Once it is charged, without unplugging it, reboot to recovery and wipe battery stats in the ADVANCED section. As soon as your wipe it, very quickly unplug the phone. (as fast as possible). Once you do this, reboot your phone and completely drain it to until it turns off and you cannot turn it back on unless is plugged. Once it is drained charge it completely full withot unpluggin it or turning it on.(Best time to do this is at night, since you are probably not going to use it while you sleep). After that just use it daily. You have to give it a couple of days so the battery syncs up. Hope I helped out!
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Click to collapse
No offense, but what you have read is incorrect and is rooted in a misunderstanding about how the os and li-ion batteries work.
1. Wiping battery stats does nothing pertaining to charge indication. The file cleared is an already blank file that lists nothing more than a list of the apps that have consumed power. This file is cleared by the is on every reboot already.
2. Completely draining the battery shortens its serviceable life.
Any "results" that are seen by doing the above are merely attributable to the placebo effect.
Sent from my Galaxy Nexus using Tapatalk 2

Battery Draining While Phone is Off

I just got my nexus 4.
Last night I charged the phone completely, disconnected if from charger and turned the phone off.
This morning when I turned it on the battery was drained 15% down to 75%
Does anyone else have this problem?
Defect with phone?
Thanks for help.
You have to let the battery settle and let the battery stats calibrate. The % that you had after rebooting is what you really have. The first time it wadjt showing the right amount.
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android88 said:
You have to let the battery settle and let the battery stats calibrate. The % that you had after rebooting is what you really have. The first time it wadjt showing the right amount.
Sent from my Nexus 4 using xda premium
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He said he turned his phone off...
I don't see how it can lose 15% if it is completely shut off. That's weird.
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Crisisx1 said:
He said he turned his phone off...
I don't see how it can lose 15% if it is completely shut off. That's weird.
Sent from my SGH-T999 using xda app-developers app
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Click to collapse
Then when he turned it on, he "lost" 15%. Like I said in my post, what it said before he turned it off was wrong. He didn't really lose 15%. It was just displaying the wrong thing.
Sent from my Nexus 4 using xda premium
You might have some apps running in the background that is preventing your device from going to deep sleep to conserve power. Check what's running in the background when your phone is off. You can use better battery stats app to check what's consuming your battery level.
Are your running a custom kernel? I've heard of a few cases with kernels where even though the phone is sleep and screen off just touching the screen will cause battery drain.
Sent from my Nexus 4 using xda app-developers app
I'm guessing you either meant it was at 85% or drained 25% down to 75
Either way this is common on a lot of phones now due to the way the battery gauge works. When you turn your phone off then on it doesn't always remember where it was so gives a value and then if it's under where it should be it soon recalculates and can either starts going up or stays on the same value for a long time. This has happened on both my old SGS2 and also my N4 for example this morning while my phone was being drained by the FB app keeping GPS on, I turned off location access and then restarted my phone which dropped a few extra % and then sat for a good few hours at that % even though I used my phone.
Moral to the story is don't always take what you see as true, give it time to settle and see how it goes over a few charging cycles.

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