Database Users

Battery voltage when fully charged

Hey guys,
can you post what voltage you have, when you fully charged your sgs2?
my value is 4,145V i'm just curious if thats the value i should have when fully charged, or if i should calibrate my battery (i switched some roms)
thx

I've got 4125-4135mV

ive got 4215mV hehe, healthy battery

blickmanic said:
ive got 4215mV hehe, healthy battery
Click to expand...
Click to collapse
Dang, you've got one helluva great battery! Mine at most is 4198mV.

coolfire said:
Dang, you've got one helluva great battery! Mine at most is 4198mV.
Click to expand...
Click to collapse
i take good care of my batterys power cycles every time

coolfire said:
Dang, you've got one helluva great battery! Mine at most is 4198mV.
Click to expand...
Click to collapse
The same at my cell.
Sent from my GT-I9100 using XDA Premium App

last time i calibrated the battery i reached 4,205 , that is my personal record. But this value is not very significative because it depens from the corrent usage of the phone. Screen on + cpu running a little bit can decrease voltade showed by 0,1 volt. And i also noticed that the charging process is strange. I assembled a little photovoltaic power station and i know the charging process of lead acid batteries. Because they are composed by 6 elements connected in series, at the end of the charging process the charger need to provide for a short time a voltage 1 volt higher than the normal to equalize the cells. The behavior of the Galaxy s2 charger is similar. The top voltage is reached for a few minues then it decrease to a float level. Very strange thing because the battery is a SINGLE cell and don't need the equalization charge like lead acid batteries.
Probably i just have to study much and play less with my galaxy

simax said:
Hey guys,
can you post what voltage you have, when you fully charged your sgs2?
my value is 4,145V i'm just curious if thats the value i should have when fully charged, or if i should calibrate my battery (i switched some roms)
thx
Click to expand...
Click to collapse
Roughly the same.

this time i have 2,204V right after reaching 100%
i guess it varies a lil' more than on my hd2 (i had always the same value there)
EDIT:
obviously i mean 4,204V haha

4,152 V most of the time. Didn't notice it go higher than that on my phone

blickmanic said:
i take good care of my batterys power cycles every time
Click to expand...
Click to collapse
Please tell me how often you do the power cycle and how?
Thanks in advance

i power cycle every time, charge it full overnight, use it for two days, then charge it overnight again
rinse and repeat

mine was just at 4195
i left it on charge for about 30mins after it beeped to say it was full and just callobrated it as i have been flashing loads of stuff all day

After three calibrates, I get a max of 4.200v and a min of 3.451v
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Mine is 4195 mV..

Mine exactly 4.2V (4200mV)

Mine 4201mV. This is the time to press the "calibrate battery" button. Right at the top.

Tinderbox (UK) said:
After three calibrates, I get a max of 4.200v and a min of 3.451v
Click to expand...
Click to collapse
what app is that?
mines highest is now 4200 exactly
like the look of that app though

How to increase battery life 200%!

Hi, i stumbled across something.
Normally my fully charged X8 lasts about a day (I charge it every night)
I was at this friends house and forgot my charger, so i borrowed his HTC charger. This resulted in a battery that lasted twice as long! I tried it a few times and there is a real difference between the 2 chargers.

actually I've lost my charger and always charging with htc charger(my brother's) so anyway charging every night.. and htc charger can't charge battery till 2400 mah

My battery lasts 3 days im using wi fi ever day and some games. Charged with stock charger
Sent from my X8 using XDA Premium App

around 2 days with a lil Angry Birds + wifi + facebook + web browser
last time I'm doing my experiment with very low usage, I got six days!
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and yeah, with stock charger.

HaN6787 said:
around 2 days with a lil Angry Birds + wifi + facebook + web browser
last time I'm doing my experiment with very low usage, I got six days!
and yeah, with stock charger.
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Click to collapse
plz how you do that ???

Wao, is it possible??...I though only classic phone can make 6 days per charge.

I told you. very low usage. FYI that was FroyoBread. very good battery life

ALWA7SH6 said:
plz how you do that ???
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Click to collapse
He said "very low usage".

No wonder, I am using gingerdx v10 and my battery life only last for 1 days.
x8 with gingerdx v10, [email protected], fast reboot, AMM and Go Launcher.
Thanks doixanh!!!

i use an app that increases the battery time,its juicedefender

lvoonjian8888 said:
No wonder, I am using gingerdx v10 and my battery life only last for 1 days.
x8 with gingerdx v10, [email protected], fast reboot, AMM and Go Launcher.
Thanks doixanh!!!
Click to expand...
Click to collapse
what is AMM

Auto memory manager. And yea.. On gingerDX I get no battery drain if phone is idle for around 2-4 hours.

My battery lasts about 2-3 weeks
i only turn on the phone when i need to make a call, like a bawss..

Nikkopt said:
My battery lasts about 2-3 weeks
i only turn on the phone when i need to make a call, like a bawss..
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Made me smile. Such a useless input
HaN6787 said:
I told you. very low usage. FYI that was FroyoBread. very good battery life
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Click to collapse
FroyoBread, eh? I use that too.. My battery lifetime sucks balls but i guess that's just the way the cookie crumbles.

My battery life s*cks. I have to calibrate the battery and do some improvements (like use "Battery Doctor to save battery" app)
I think the charger doesn't make difference because the battery as a limit, and the charger charges the phone to that limit =D xD watch out, don't use chargers with different voltage and amperage, if you use one with more than the stock charger you probably will burn out your battery xD

I using GingerDx v010 and i have to charge it every day...2 times!!!But i think i use it a little too much!
Could the charger make that difference???I think no.

Any chance it would work on other phones such x10 ? Because for us it isnt so good battery life :/
Sent from my X10i using XDA Premium App

RockitOut11 said:
My battery life s*cks. I have to calibrate the battery and do some improvements (like use "Battery Doctor to save battery" app)
I think the charger doesn't make difference because the battery as a limit, and the charger charges the phone to that limit =D xD watch out, don't use chargers with different voltage and amperage, if you use one with more than the stock charger you probably will burn out your battery xD
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Click to collapse
Did you close wifi/3g/bt when you don't use them? Close them will increase your battery life.

shahkam said:
Any chance it would work on other phones such x10 ? Because for us it isnt so good battery life :/
Sent from my X10i using XDA Premium App
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Click to collapse
Sometimes ROM doesn't affect battery life, affecting battery life is your own habit.
As doixanh said (the dev that make GingerDX), reboot phone after listen to music, etc. I wish i could help you.

every one that wants longer battery life, download SuperDim from the market. My battery lasts 2-4 days depending on usage using Floyo .30

Long Lasting Battery!!

Hello Everyone,
I am seriously tired with the really little battery backing up time if I do heavy usage...So here is a really cool and serious method on how to improve the battery backing time.
Remember...Try the method with your Risk..You will the sole responsible if anything happens to your battery(although nothing will happen if you follow the instructions properly).
So here it goes:
1. Drain your battery to 0%.
2. Remove the battery.
3. In a polythene or a ziplock pouch place the battery in it and safely secure the pouch or polythene.
4. Now keep the battery in a DEEP FREEZER...(Brand Recommended: LG )
5. Let the battery remain in the DEEP FREEZER for 12-18 hours.
6. After the time has passed, remove the battery from the deep freezer, unpack it from the pouch or polythene, and let it come to a warm temperature.
In the mean time, while the battery is outside, there will be water droplets around the battery...dont worry its perfectly safe, but make sure that you clean them.
Now place it in your phone and charge it...You will see the difference...
How it works:
If you are a chemistry student or if you have learnt chemistry, the battery contains lithium fluid, which after a period of time starts to become more liquidish..so the bonds weaken, and therefore less battery backing time...If you keep it in the deep freezer, the bonds become more powerful and hence they 'Handshake' more perfectly. So therefore a better battery backing time.
I did this trick, and it really works...so go ahead and try it!!!

Anybody tested?wanna try,but I always get backfire by doing silly stuff.and as I rember.I saw a warning that the battery shouldn't be cooled below the temperature of 4°C

shadik555 said:
Anybody tested?wanna try,but I always get backfire by doing silly stuff.and as I rember.I saw a warning that the battery shouldn't be cooled below the temperature of 4°C
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LoL.....batteries musnt exceed the temperature above 40 degrees....cooling wont harm it in anyway!!!! and i tried...it seriously powerups ur battery!!!

I get 4 - 5 Days out of my battery! So i don't have to do this YET. Really thanks for this. I will try it when my battery starts to be weak.

Do you have any screen shots of your battery consumption to back up you claim by any chance...
Sent from my GT-I9100 using xda app-developers app

HemdonG said:
If you are a chemistry student or if you have learnt chemistry, the battery contains lithium fluid, which after a period of time starts to become more liquidish..so the bonds weaken, and therefore less battery backing time...If you keep it in the deep freezer, the bonds become more powerful and hence they 'Handshake' more perfectly. So therefore a better battery backing time.
Click to expand...
Click to collapse
Wow, pretty cool. Worth trying. :good:

Heh,gonna try.I have nothing to loose,probably :silly:
If I break the battery,buying myself a xperia mini,not a x10 mini.can you explain what is polythen and a ziplock pouch?

shadik555 said:
Heh,gonna try.I have nothing to loose,probably :silly:
If I break the battery,buying myself a xperia mini,not a x10 mini.can you explain what is polythen and a ziplock pouch?
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Polythene is a shopping bag....
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Ziplock pouch is a sealable bag which can open and close.

lol , use this.
no matte how battery drain.
Send from my Galaxy Nexus using Tapatalk 2

kakho55 said:
lol , use this.
no matte how battery drain.
Send from my Galaxy Nexus using Tapatalk 2
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Click to collapse
lol

hahaha...
nice post sir...
maybe someday i will put my battery in refrigator..
hahaha...

Didn't help at all
For a 12-18 hours there,I thought you weren't kidding.

On a side note, i have seen it guys put flash drives in the freezer for few minutes. I can't think of a reason why.
Sent from my rooted tomato using xda app

Freezing will actually damage the battery in the long run. The same holds true for totally draining it.
Now, this method might work in the short term but not in the way you're thinking. Freezing the battery will actually slow down the chemical processes, which results in what could be described as undervoltage at the hardware level.

Fortun said:
Freezing will actually damage the battery in the long run. The same holds true for totally draining it.
Now, this method might work in the short term but not in the way you're thinking. Freezing the battery will actually slow down the chemical processes, which results in what could be described as undervoltage at the hardware level.
Click to expand...
Click to collapse
Here is a thing.....download a battery indiacator widget...note the current voltage produced while its FULLY charged.....then after freezing and charging it to 100%, notice the widget again....it seriously does helps it and the battery....it doesnt harms the battery for a really long use....i did this, and noticed that i got a maximum voltage of 4193!!!....do test it!!!

shadik555 said:
Didn't help at all
For a 12-18 hours there,I thought you weren't kidding.
Click to expand...
Click to collapse
I am rite now thinking that u are joking..

Battery life didn't change.I let it freeze for 16 hours.nothing changed :/

I can affirm this info is true. Long old tricks actually, but it does improved battery performance and life.
A testimonials.
Freezing Laptop Battery

I admit i've had doubts about this but...
should we start a poll for those who have tried and whailt results they got? Because if this really works it's very helpful, not to mention informative. (I do hate chemistry)
Sent from my rooted tomato using xda app

i will try it when my battery starts to be weak..thanks for the tips

How to calibrate battery?

My battery stats and consumption have been pretty good and whatnot but I just realized it's off and sometimes doesn't count down consistently. But then it will catch up real quick. I am assuming the battery chip/driver are able to measure amps and not guesstimate voltage because of this behavior. I charged battery all the way up, unplugged, turned power off, plug back in til full and started up again but the behavior is still erratic. I am pretty sure I am getting somewhat accurate readings, it is just doing so in an erratic method. Ideas or references I missed? Anybody else notice?
As a side note I thought I was losing 1-2% per 6-8hours of standby but I realized there is a bug or the battery driver doesn't read correctly in standby. Anybody notice this too?
I voided my warranty.

@rbiter said:
battery.
Click to expand...
Click to collapse
The battery reporting is definitely inconsistent on this device. I've tried pinging it via terminal emulator to "force" it to re-poll voltage and capacity, with no luck, it doesn't update it to where I know it should be. Not sure if anyone has dissected this battery yet, many Li-Po's have an internal chip, not sure about this one.

I am quite sure it has a chip. Trying to confirm if it has a chip that measures amperage. I am guessing driver is bad or bugs.
I voided my warranty.

One thing I've noticed is that it seems to poll correctly if I charge to full and don't reboot at all. As soon as I reboot it starts flatlining after that point.
Sent from my Nexus 4 using Tapatalk 2

Here's my best example yet. Upon plugging in it's quickly gone from 15 to 25...err....29% however. If I charge to 100% and don't reboot after that it doesn't drift. Something breaks the phones ability to read voltage/capacity for some reason upon rebooting. Stock or not stock, same behaviour. A few reboots in there, a couple where the % went UP.
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What is the problem can any one point out why I am getting do less battery is it because of atooma or acuupedo
Sent from my Nexus 4 using xda app-developers app

There is no battery calibration method that is anything more than a placebo. Just flash your ROMs at 100% and don't charge your phone 5 times a day. Let it drain and fully recharge once in awhile. Past that, there isn't much to be done.
Edit: Franco mentioned in his kernel thread that the battery reporting seems a little wonky. He is hoping it is addressed in 4.2.2.

Charge your phone fully while it is off to 100 then do a battery star wipe. Let drain till around 5 to 10 from regular use and then charge all the way up.
And remember that batt wipes do nothing more than have your rom read the battery more accurately, it had nothing to do with giving it better battery life. You are gonna want to flash a more efficient kernel or rom to achieve that.
Sent from my SGH-T999 using xda app-developers app

estallings15 said:
There is no battery calibration method that is anything more than a placebo. Just flash your ROMs at 100% and don't charge your phone 5 times a day. Let it drain and fully recharge once in awhile. Past that, there isn't much to be done.
Edit: Franco mentioned in his kernel thread that the battery reporting seems a little wonky. He is hoping it is addressed in 4.2.2.
Click to expand...
Click to collapse
Hard to find info about the li-po battery, especially the one in this phone. I wouldn't rule out poorly designed circuitry at this point either. Love the phone, question build quality.
Sent from my Nexus 4 using Tapatalk 2
---------- Post added at 12:29 PM ---------- Previous post was at 12:20 PM ----------
djpingpong said:
Charge your phone fully while it is off to 100 then do a battery star wipe. Let drain till around 5 to 10 from regular use and then charge all the way up.
And remember that batt wipes do nothing more than have your rom read the battery more accurately, it had nothing to do with giving it better battery life. You are gonna want to flash a more efficient kernel or rom to achieve that.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
Wiping battery stats does nothing more than reset the current charge cycle's percent usage by app/process. That's it, it won't increase the accuracy of capacity reporting.
Sent from my Nexus 4 using Tapatalk 2

CMNein said:
Wiping battery stats does nothing more than reset the current charge cycle's percent usage by app/process. That's it, it won't increase the accuracy of capacity reporting.
Sent from my Nexus 4 using Tapatalk 2
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Click to collapse
This is spot on. I tried to make that point earlier with my placebo comment, but some people are slow to catch on. Thanks for spelling it out.

Is my charger not working 100%efficient?

I have N9005 MJ7 rooted
iam using galaxy charging current pro, to measure my charger output, but with my phone gives only 1200mah, while our charger should gives 2000mah, iam using the original charger and cable which came with the mobile
is it normal, does anyone got a better score? which apps do u use?
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thermax04 said:
I have N9005 MJ7 rooted
iam using galaxy charging current pro, to measure my charger output, but with my phone gives only 1200mah, while our charger should gives 2000mah, iam using the original charger and cable which came with the mobile
is it normal, does anyone got a better score? which apps do u use?
Click to expand...
Click to collapse
i get that as well dont think charging current pro is compatible with note 3 so dont worry about it :silly:

thermax04 said:
I have N9005 MJ7 rooted
iam using galaxy charging current pro, to measure my charger output, but with my phone gives only 1200mah, while our charger should gives 2000mah, iam using the original charger and cable which came with the mobile
is it normal, does anyone got a better score? which apps do u use?
Click to expand...
Click to collapse
That app is OK and probably your charger is also OK - the circuit that controls charging is probably limiting the current in order to keep it safe (for instance if it is too warm it might use an even lover current). Also the current is optimized as to be different at different levels of the battery capacity.
That being said I am always charging over night with a safe USB port - that way the current is 500mA max and the battery life is maximized, while I still get a completely full battery in the morning.

xclub_101 said:
That app is OK and probably your charger is also OK - the circuit that controls charging is probably limiting the current in order to keep it safe (for instance if it is too warm it might use an even lover current). Also the current is optimized as to be different at different levels of the battery capacity.
That being said I am always charging over night with a safe USB port - that way the current is 500mA max and the battery life is maximized, while I still get a completely full battery in the morning.
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I have a friend who has a 3 month S4, he used to leave the battery charging over night also, and the battery swollen and life daily use decreased to less than a day in 3 month use only!!!

jaythenut said:
i get that as well dont think charging current pro is compatible with note 3 so dont worry about it :silly:
Click to expand...
Click to collapse
did u try any other apps?
why Maximum result is not showing?

thermax04 said:
did u try any other apps?
why Maximum result is not showing?
Click to expand...
Click to collapse
Na just not bothered it charges fast so I'm happy :silly:

thermax04 said:
I have a friend who has a 3 month S4, he used to leave the battery charging over night also, and the battery swollen and life daily use decreased to less than a day in 3 month use only!!!
Click to expand...
Click to collapse
Yes, but:
- the S4 does not have the same charging algorithm as the Note3
- he was probably charging the S4 (which has different battery, charger and algorithm) at 1000 mAh or so (which was the most important point I was making, the 500 mAh are not 2x safer, are probably 4 to 8x safer, probably 20x safer than 2000mAh, that is not a linear thing)
- I think the S4 batteries had a certain defective batch (the media spoke at some point about it)
- there will always be a certain very small percentage of batteries that WILL go bad "no matter what", but that is usually exceedingly small if the charge process is done correctly.