Database Users

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.
Sent from my A500 using XDA Premium App

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

Batery

If I left mah phone charging alln8 ....will it hv bad effects on my phone
Sent from my HTC Wildfire using XDA App

no, when it is charged 100%, it stops charging.

Frequently charging overnight will decrease the battery life . It will be long term effect.
Sent from my HTC Wildfire using XDA App

Yes, it will. Charge only when the battery is low, and remove from the charger as soon as poss after charging is done.

Hmmm.. Iam charging always by leaving the phone connected to the charger for the night and I think it doesnt make any difference. My battery holds about 2 days, with wifi on, 1hour of talking and using communicator, so it isnt so bad.
Sent from my HTC Wildfire using XDA App

Battery not showing 100% charged

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?
Sent from my GT-P6800 using xda premium

Yeah, I've noticed as well, but dont care too much
Sent from my GT-P6800 using Tapatalk

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
Click to expand...
Click to collapse
So its common and not an issue but still annoying nonetheless
Sent from my GT-P6800 using xda premium

How to calibrate p3100 battery

Hi i want to calibrate my p3100's battery...actually m tab 2 was on low battery when i upated it but now the battery is now behaving very oddly..plz help me to calibrate it without rooting the device
Sent from my GT-P3100 using xda app-developers app

kyahaiyaar said:
Hi i want to calibrate my p3100's battery...actually m tab 2 was on low battery when i upated it but now the battery is now behaving very oddly..plz help me to calibrate it without rooting the device
Sent from my GT-P3100 using xda app-developers app
Click to expand...
Click to collapse
Off your tab and full charge and then switch on and use it till it is dead ....
And switch it till battery is completely down ...
And again charge it till 100% without break
Sent from my GT-P3100 using XDA Premium HD app

hemantshah3 said:
Off your tab and full charge and then switch on and use it till it is dead ....
And switch it till battery is completely down ...
And again charge it till 100% without break
Sent from my GT-P3100 using XDA Premium HD app
Click to expand...
Click to collapse
What do you mean by "switch it till battery is completely down" ?
And do we switch off the tab when we fully charge it the 2nd time?

There are free apps on the playstore called "battery calibration" that basically erase your battery config file and allow the ROM to re-learn the battery usage, etc. Very easy to use, charge your battery to 100% - then click the button on the app, it erases the file - you unplug the unit, and use it normally. The software will build a new file
Your unit has to be rooted for this to work, and I have read that it does not really do anything, while others swear by it every time they flash a new ROM.
Do some searching - read some of the posts and details on them, and make your own decision
Good luck,
Regards,

Calibre battery is myth in all modern devices! It only erase battery usage data..

but FYI, its pretty useful on some devices!
i have xperia which has pretty erratic battery life..so clearing battery stats really helps!

battery calibration

after flashing dsc i discharged my fone to 0% battery 5-10 times... as said in dsc flashing guide
battery calibrated properly nd worked fine for 2-3 days then its again jumping from 30% to 1% and then again to 30% ......
i have cleared battery stats and repeated the process but still no progress
Sent from my Dell Streak using xda premium

Wiping battery stats is a myth. Doesn't work at all.
Probably your battery is old and used up
https://www.xda-developers.com/andr...-battery-stats-does-not-improve-battery-life/
Sent from my HTC Raider

Ace38 said:
Wiping battery stats is a myth. Doesn't work at all.
Probably your battery is old and used up
https://www.xda-developers.com/andr...-battery-stats-does-not-improve-battery-life/
Sent from my HTC Raider
Click to expand...
Click to collapse
TRUE
Sent from my Dell Streak 5
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naah battery is good
total ussage time is god but the battery percentage is not proper
this is the only problem
Sent from my Dell Streak using xda premium

I got same problem. Did you ever solve this?

i just charged it t0 100% ghen let fone drain to 0% and switch off by itself.
but it had to be done always, once you start charging your battery before 0% it would again go crazy,
Sent from my Micromax A110Q using xda app-developers app

Have you try to test the battery capacity?.
The accurate way is to test it using mAH meter, but you might try to test it using application below:
https://play.google.com/store/apps/details?id=ru.NanoDinamics.NovaTester
I've use it for testing original OEM 1530 Dell battery and it show exactly 1530mAH, and then try it again with another custom 1800 mAH Dell battery and it show 1758 mAH.. closed enough ....