PDA

View Full Version : How to Calibrate Battery And Charge Battery To Max mV



cobracon71
11-28-2011, 08:25 PM
Battery Calibration and Max mV

You must be rooted to utilize this method

1. While in Android, charge up to 100% and leave the phone plugged in.
2. Using root explorer or es file explorer delete /data/system/batterystats.bin
3. Remove back cover
4. Press Power and choose to reboot normally.
5. When the screen goes black and the lights go out, pull out the battery before you get the M logo. It will probably still work after the M logo shows up but that's how I do it.

6. Surprise: The phone will boot up without the battery! - Mine does - every time

Note: Batterystats.bin is recreated when you see the M logo - even though the battery isn't in the phone.

Go to Step 8 if the phone booted up as described.

7. If it doesn't boot up and you see the battery with the ?
..........a) Put the battery back in (you will see 60%),
..........b) Power off the phone (press power until LED light goes out)
..........c) Power on the phone (press power until you see the M logo)
..........d) Remove battery... and watch bootanimation...

8. a) After the surprise of seeing the boot animation without a battery, you will then see the lock screen along with a "No SIM card error" and no signal.
...... Put the battery back in - the SIM card error will disappear, you will get a signal, it will show 60% full and the icon will show the battery charging.
...... Go to Step 9 if this works as planned. If it doesn't, reboot (again without the battery) and use step 8b instead of step 8a.
... b) Put the battery back in during the bootanimation, but after the haptic feedback/vibration (and the buttons along the bottom light up).
....... On a normal reboot, you can actually slide and unlock the phone when you get the vibration during the boot animation. You knew that, right? http://media.xda-developers.com/images/smilies/wink.gif

9. Use your phone normally while you calibrate the battery http://media.xda-developers.com/images/smilies/biggrin.gif

10. Let it fill it up to 100% + 15 minutes or so. When it is truly finished charging, the battery should be cool.

11. If the phone is running hot, weird things can happen. For example, you may get no signal when you put the battery back in or the battery doesn't begin charging (the status bar battery icon doesn't change). Just let the phone cool off and it should work next time.

100% full is approximately 4200mV
As you can see in the cap below, it's showing only 60% at 4241mV (This was after booting up without the battery and putting the battery in)
A few minutes later, still plugged in, it showed 100% at 4225mV and then it went up to 4230mV.

Finally, I then unplugged the phone and I got a reading of 4196mV http://media.xda-developers.com/images/smilies/biggrin.gif



This is proven to work and works well... I did not come up with this nor do I take credit for it... I copied and pasted this on word from another forum but could not tell you where lol

I am not responsible for what you may or may not do to your phone by doing this

Moderators if this has been previously posted please discard the thread thank you


Droid X Forums Rule

cory46
11-28-2011, 08:36 PM
Here maybe :)

http://www.DroidXForums.com/forum/showthread.php?p=428673

Battery calibration (New method?)

Sent from my DROIDX using Droid X Forums

cobracon71
11-28-2011, 09:15 PM
maanneee this is the second thread ive started that you have hijacked with another link what up with that llmaaoo u did it to my uot kitchen thread also

cory46
11-28-2011, 09:38 PM
maanneee this is the second thread ive started that you have hijacked with another link what up with that llmaaoo u did it to my uot kitchen thread also

Ha I did? I'll have to investigate this one haha. Sorry in advance if I did

Sent from my DROIDX using Droid X Forums

silver04v
11-28-2011, 10:39 PM
So, is this tested on the dx?
Are the directions the same. What's with the Sim card error stuff.

taking miui for a spin

Scram
11-28-2011, 10:46 PM
So, is this tested on the dx?
Are the directions the same. What's with the Sim card error stuff.

taking miui for a spin

Yes. Works on the X...

Sent from my liberated DX

mikey2487
11-28-2011, 11:11 PM
i ended up just doing this on my phone and everything worked fine. only thing i noticed is that when i let it charge from 60 to 100 it didn't go 60,70,80, etc to 100 it just went 60% to 100% but when i did the battery calibration i was at 4176 so i'm assuming it worked fine. thanks for this cobra!!

ryant35
11-29-2011, 12:18 AM
i ended up just doing this on my phone and everything worked fine. only thing i noticed is that when i let it charge from 60 to 100 it didn't go 60,70,80, etc to 100 it just went 60% to 100% but when i did the battery calibration i was at 4176 so i'm assuming it worked fine. thanks for this cobra!!

Mine did exactly the same thing.

lindross
12-07-2011, 05:05 PM
Mine did exactly the same thing.

Same here so I can only assume it went right.

cobracon71
12-07-2011, 06:45 PM
that is correct it will jump from 60 to 100 but make sure you leave in on charge a additional 20 to 30 minutes for max charge

MIck11
12-07-2011, 09:05 PM
Sweet!

Sent from my DROIDX using Droid X Forums

chuck54
12-18-2011, 10:32 PM
So I'm on 12.Something miui.us and I put the battery back in when it was fully booted without the battery and it had a ? On the battery. Once I put it back in, it rebooted and said it was 100%,not 60, like the post says. Is this normal?

swalker
12-18-2011, 10:58 PM
Try this, works better IMO
Phone on, charge till full and delete stats.
Reboot
As soon as screen goes black pull battery.
Let phone continue to boot.
Right after your button lights appear put battery back in.
Do this all in "same" reboot.


Why they ask? , because I can!

Azzuron
12-21-2011, 08:10 AM
my phone 100% of the time dies after i pull the battery and does not continue to boot or do anything. not sure what I'm doing wrong.

chuck54
12-22-2011, 10:33 AM
IV also found that this is easier, as long as I make sure its dead. On the latest 12.9 miui.us it dies then will still give 5% witch is VERY handy! But my battery status is still a. ?Mark. Should I reboot again

Sent from my DROIDX using Droid X Forums

swalker
12-22-2011, 08:23 PM
my phone 100% of the time dies after i pull the battery and does not continue to boot or do anything. not sure what I'm doing wrong.

Are you leaving it plugged in to outlet

Why they ask? , because I can!

maybish
12-23-2011, 09:58 PM
I'm going to need to do this tonight. My battery has been unbearable the past couple weeks and just now while using into google plus it went from 69% to 49% in a matter of 2 minutes!

from my PINK Droid X

vulcaninvt
01-04-2012, 08:53 AM
For the life of me I am not able to get this to work. When I follow the instructions, I do not get "No SIM card error". I get something about a non Verizon battery (sorry I do not have the exact language). I have attempted all the the different steps and do get to the 60% mark, but then it goes right to 100%. I have not received a charge higher than 4155.

I find now when I unplug the phone, it drops to 99% within a second or two. Any thoughts on what is going on? I am running Liberty 2.0

Thanks!

silver04v
01-04-2012, 10:08 AM
For the life of me I am not able to get this to work. When I follow the instructions, I do not get "No SIM card error". I get something about a non Verizon battery (sorry I do not have the exact language). I have attempted all the the different steps and do get to the 60% mark, but then it goes right to 100%. I have not received a charge higher than 4155.

I find now when I unplug the phone, it drops to 99% within a second or two. Any thoughts on what is going on? I am running Liberty 2.0

Thanks!

Dropping to 99 is normal

Sent from my DROIDX using Droid X Forums

Willup
01-04-2012, 10:55 AM
As soon as I pull the battery when I reboot and it goes blank for a second it will not boot. Throw the battery back it and it will boot. Using ICS beta rom so I dunno if this has something to do with this.

vulcaninvt
01-04-2012, 01:38 PM
Thank you, is the 4155 fairly normal or is it low? I just see my batter draining faster now, maybe it is just due to Liberty?

Nemo aeternamn
01-04-2012, 01:40 PM
Thank you, is the 4155 fairly normal or is it low? I just see my batter draining faster now, maybe it is just due to Liberty?

How long did you let it sit after it got to 100%? Your voltage should be closer to 4.2v

Everyone owns a gun deep inside...
It's just a matter of how much you let it slide

vulcaninvt
01-05-2012, 09:38 AM
How long did you let it sit after it got to 100%? Your voltage should be closer to 4.2v


Once I go through the steps and get it to 100% I let it charge for about 30 minutes or so before checking. I have not been above 4155 yet... ?

Nemo aeternamn
01-05-2012, 11:02 AM
The average voltage is 4.2.. In the ginger kernel... Mines usually 4.194/4.196...

We have nothing to fear but running out of beer

vulcaninvt
01-05-2012, 03:52 PM
I am wondering why I am not getting near that, head scratching...

schluger
02-27-2012, 10:35 PM
I don't get what you mean by step 9 use your phone normally while you calibrate the battery. How am I calibrating the battery?

hecksagon
06-21-2012, 09:03 PM
Batterystats.bin

A google developer has told the android community that batterystats.bin does not contain any information about battery calibration. It simply stores usage statistics about which apps are using the most battery. Erasing this file will do nothing but clear those stats. The battery itself stores all of its on charge information in its own circuitry.

Battery Capacity

Batteries of the same model can vary in maximum capacity. All of the specs you see on the battery are the minimums they have to meet to leave the factory they are made in. Some are right at this minimum, some are much higher.

Charging

Android will charge a battery rapidly to around 80%. From there it will trickle charge it to 100%. Since you do not want to overcharge, once the battery reaches 100% it stops charging and lets the battery discharge a few percent. Then it trickle charges back to 100% and then back down. The whole time the battery will still report full charge. If you take it off the charger while its at its lowest point of discharge, you may see your battery drop from 100% to 95% quickly. To maximize you charge, leave your phone on the charger until you get to 100%, then unplug, wait 30 seconds or so, and plug it back in. Doing this tricks the phone into potentially overcharging it. This may lower your battery's lifespan.