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battery calibration?

hi!
don't know if this is the right forum, but i think i'll give it a try
how can i calibrate the battery of my hd2? or is this not neccessary?
should i always discharge 'till the battery is nearly empty, or is this not a good idea and i should recharge at a certain battery-level the latest?
thanks very much for your help!

im getting v good battery usage and i do thid by full charge full drain 3 or 4 times and i tend to charge when gets to 10% hope this helps g

hebbe said:
hi!
don't know if this is the right forum, but i think i'll give it a try
(...)
Click to expand...
Click to collapse
i think the hd2 general forum would have been more appropriate for this but i guess it won't hurt anyone if you posted here
there are many contrasting views about this and you will probably get confusing answers. i am not an expert but i'll try to brief you with some info i've got from my readings about lithium-ion batteries and my personal experience, of course.
so here we go:
hebbe said:
how can i calibrate the battery of my hd2?
Click to expand...
Click to collapse
1. discharge fully until the phone shuts down by itself
2. remove battery and wait ~1 minute
3. charge completely with the phone OFF until the green light is lit
4. remove battery and wait ~2 minutes
hebbe said:
is this neccessary?
Click to expand...
Click to collapse
some recommend to do it every 3 to 6 month
here you'll find many that recommend you to do it after flashing a new radio rom.
from my own experience i tend to agree with this
hebbe said:
should i always discharge 'till the battery is nearly empty, or is this not a good idea and i should recharge at a certain battery-level the latest?
Click to expand...
Click to collapse
i've read somewhere that lithium-ion batteries like being charged as often as possible and don't like being left without juice. this is the main reason some people don't want to even hear about the calibration procedure. but i think there is a big difference between complete discharging now-and-then and complete discharging as a habit.
i've never heard anybody recommend a precise low level limit when you should start to recharge.
there is no danger to overcharge though.
hebbe said:
thanks very much for your help!
Click to expand...
Click to collapse
no problem mate,
cheers

Poor Battery Life on NS?

I'm going to try to purchase my Nexus S before class tomorrow when they open. Don't want to take any chances on it selling out. Would it be wise to turn it on and use it a while during the morning? Or does the battery need to be fully charged before using it to condition it and ensure a good battery life? I've read many battery tips but i'm still a little confused on whats better for a new battery.

CaliLove310 said:
I'm going to try to purchase my Nexus S before class tomorrow when they open. Don't want to take any chances on it selling out. Would it be wise to turn it on and use it a while during the morning? Or does the battery need to be fully charged before using it to condition it and ensure a good battery life? I've read many battery tips but i'm still a little confused on whats better for a new battery.
Click to expand...
Click to collapse
When you get it, deplete it, but do not let it die. Ever. Then just cycle it normally.

zachthemaster said:
When you get it, deplete it, but do not let it die. Ever. Then just cycle it normally.
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Click to collapse
What do you mean by "die".... like to 0%, if so what should we take it down to?

azn2050 said:
What do you mean by "die".... like to 0%, if so what should we take it down to?
Click to expand...
Click to collapse
Yes, by letting your battery "die", per se, you're letting it deplete to 0%. I'd say for safe measure, between 5%-9%. But if you're in the vicinity of a charger take it down to 2%. If not, turn it off at 5%, then plug it in before powering it back on. My devices' daily life lasts so long (on all devices I own) because I properly know how to cycle a battery.

If you let your battery die (0%), it'll lose more and more charge (on a 0.00% level) every time. When you get it tomorrow though, it should have ~50%-60% charge.

CaliLove310 said:
I'm going to try to purchase my Nexus S before class tomorrow when they open. Don't want to take any chances on it selling out. Would it be wise to turn it on and use it a while during the morning? Or does the battery need to be fully charged before using it to condition it and ensure a good battery life? I've read many battery tips but i'm still a little confused on whats better for a new battery.
Click to expand...
Click to collapse
There's no need for that, only if it doesn't have any juice.
More info: batteryuniversity dot com

Battery life?
So how are your batteries doing? Mine is kind of crappy. What supposedly changed in 2.3? I see no difference in the reporting of apps in Battery Use and they took away Battery History in the hidden system settings. Where is the graph everyone talked about?

You gotta give it a few charging cycles for the battery to reach it's full potential. Give its few days, you'll notice it will get better after you charged it a few times.
Sent from my Nexus S using XDA App

The battery life on mine is chugging along pretty well. I gave it a full charge before hitting the streets. Its been 4 hours with wifi and GPS on with a couple dozen pictures taken and a bunch of apps dl and installed. used maps 5.0 and periodically hit the GPS for my position getting really good accuracy while driving and the battery level still has a little more than 4/5s battery life still remaining
Sent from my Nexus S using XDA App

hah2110 said:
So how are your batteries doing? Mine is kind of crappy. What supposedly changed in 2.3? I see no difference in the reporting of apps in Battery Use and they took away Battery History in the hidden system settings. Where is the graph everyone talked about?
Click to expand...
Click to collapse
You haven't broken it in yet, use your brain.

The phones barely been out that long, it takes a while to have good statistics about battery life.

Myth on lion
rashad1 said:
You haven't broken it in yet, use your brain.
Click to expand...
Click to collapse
Sent from my Nexus S using XDA App

I haven't even reached the full 100% charge yet, been using it then charging it some then using it then charging it some. Lol

hah2110 said:
So how are your batteries doing? Mine is kind of crappy. What supposedly changed in 2.3? I see no difference in the reporting of apps in Battery Use and they took away Battery History in the hidden system settings. Where is the graph everyone talked about?
Click to expand...
Click to collapse
hah2110 said:
Myth on lion
Sent from my Nexus S using XDA App
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Click to collapse
That's funny because every company that sells back up batteries tell you to go through 4-5 full cycles before it reaches its potential. I guess you're right, and they're all wrong.

They are wrong. Google it
Sent from my Nexus S using XDA App

Battery
how do I train my battery it was halfway charged when i got it do I let it die and then put it on the charger thanks!
EDIT:WRONG SECTION DELETE THIS MODS!

I've always charged all the way up then ran the battery all the way down, then charged all the way up again. Then periodically, I will run the battery all the way down just to give it a little exercise. So far out of all the cell phones I have had I have had 1 battery go bad on me, that was 8-10years ago.

Battery
how do I train my battery it was halfway charged when i got it do I let it die and then put it on the charger thanks!

matter of opinion really.... I would kill it by playing with it.... then do a full charge
that is what I am doing

Generally the suggested method is to charge it for 8-12 hours as soon as you can, then use it until it gets very low, then charge for another 8-12 hours. Do this cycle about 3 to 4 times and you've got yourself a healthy battery.
Killing the battery entirely, despite popular belief, can have some negative effects on its health. Especially during is conditioning phase.

How to calibrate your battery

I have been seeing a pretty good amount of posts lately about how to properly calibrate your battery. This is a quick step by step guide on how to do so.
I will outline 2 ways to calibrate your battery.
The first way is using a free app from the android market (easiest IMO)
The second way is using CWM.
But first.... Some common questions.
Why would I need to calibrate my battery?
Anytime you flash a new rom it is recommended to calibrate your battery to optimize the battery life of your device.
You can calibrate your battery at anytime if you believe you should be getting better battery life.
How does it work?
When you calibrate your battery you are wiping your batterystats.bin. This allows for your operating system to create new battery stats that can drastically improve your battery life.
Using battery calibration app
First, install Battery Calibration by NéMa from the android market.
Once installed...
1. Charge your phone to 100%
2. Without unplugging your phone... open battery calibration
3. You will have to allow root permissions if first time using the app. Make sure the app says your phone is charged to 100% as well. Your voltage should be 4200mV or as close as possible.
4. Click on battery calibration in the middle of the screen.
5. Unplug your phone.
Now your battery stats are fully wiped. To fully create new clean stats follow the next steps.
6. Without charging your phone at all... let it die completely until it shuts off.
7. Plug your phone in and without a break let it charge to 100%
8. Unplug your phone
9. Let your phone die completely until it shuts off.
10. Fully charge your phone to 100% battery again.
11. Unplug your phone.
12. Let your phone die completely until it shuts off (last time)
13. Charge your phone back to 100% again.
CONGRATS! Your battery is fully calibrated!!
Note: it is recommended to do 4 full cycles to completely calibrate your battery but you should notice a difference after the first cycle.
USING CWM
1. Charge your phone to 100% full.
2. Reboot to CWM (recovery)
3. Scroll down using volume keys and choose advanced
4. Choose wipe battery stats
5. Reboot phone.
Now your battery stats are wiped. To fully create new clean battery stats follow steps 6 through 13 above.
As stated this is just a quick guide for reference for anyone having questions regarding calibrating your battery. If I have left anything out feel free to mention and I will add it in asap.
If this post helped you please hit the thanks button

These threads are useful too.
http://forum.xda-developers.com/showthread.php?t=1334950&page=2
http://forum.xda-developers.com/showpost.php?p=16771651&postcount=41
The second is from the Tab forum, but apparently our phones have the same MAX17042 fuel gauge chip which reads open circuit voltage to provide battery stats. As Vlad_z states, deleting the log file does not actually calibrate the battery, this is done automatically with the MAX17042 chip. The 2nd link does give instructions on how to reset / calibrate this chip without a jig.

I have definitely noticed a difference after using the battery calibration app as well as clearing battery stats through CWM.
I did try vlad_z calibration as well. I am still in the process of letting my battery die currently for a comparison. However it has been about 26 hours and I still have 37% battery left with moderate use.
I will be updating the OP to contain Vlad_z procedure as well

Nice post. I always just calibrate through cwm when I hit full charge. I never do three complete drains and recharges though. Usually one complete drain one complete charge and then use my phone as normal. Have you really noticed a difference doing four full cycles?
also it step 6. I've found if you power the phone back on after it dies it will truly kill the battery.
Still cool to get over 36 hours of use on this phone. Almost as good as my old dumb phone(which I sorely miss).

I have 5 batteries for this phone. 2 are 1500mAh and 3 are 1800mAh.
I assume I would have to recalibrate for each battery?

arclite00 said:
I have 5 batteries for this phone. 2 are 1500mAh and 3 are 1800mAh.
I assume I would have to recalibrate for each battery?
Click to expand...
Click to collapse
What do you need all that power for? Do you have five devices? I Would think you would calibrate based on which mah you are using since you are only deleting a file on your phone. I.e once for 1500 and only use those batteries.
Sent from my SGH-T959V using XDA App

arclite00 said:
I have 5 batteries for this phone. 2 are 1500mAh and 3 are 1800mAh.
I assume I would have to recalibrate for each battery?
Click to expand...
Click to collapse
Internal memory of the fuel gauge chip has room for two battery profiles, it cannot hold 5... so, if you are using all 5 then state of charge (soc) reported back to OS level would be pretty much inaccurate.
You can delete batterystats.bin all day long with cwm or apps - this is just as usefull as dancing with rainstick around your phone.
If you absolutely need multiple batteries then stick with same nominal 1500 or 1800. That way fg chip would report average value, granted your batteries should be the same age and health.

Posts like these are truly helpful, This should be sticked imho. I'm a complete noob to flashing, just performed my first two flashes last night, and it's a job trying to scour through these forums and read through all the posts trying to find the information you are looking for. I did it, and I'm very happy with the results. Damned if I was going to ask a question on these forums. you guys got me scared. hehe.
Anyway thanks, as this was the next piece of info I was hunting for!

Hello,
I have three batteries : 2x Original 1560 mAH and 1x 2430 mAH
How to calibrate them with my HTC Sensation ?

adlene72 said:
Hello,
I have three batteries : 2x Original 1560 mAH and 1x 2430 mAH
How to calibrate them with my HTC Sensation ?
Click to expand...
Click to collapse
If you are rooted, you can use the app from the market
Sent from my SGH-T959V using xda premium

In charging after fully discharging the phone, do i charge it while it is off or can i charge it while it's on?

Battery calibration by deleting the file is now known to be complete snake oil. Confirmed in the code as well. Deep discharge cycles, along with heat, are enemies of Li ion batteries. While it seemed a very good idea at the time, following this procedure is now known to be only detrimental to battery life, even if it makes people feel good.
Posted from my SGS4G, thanks to Team Acid development

Jeff is correct. Since these instructions the myth about battery calibration has been debunked
Sent from my SGH-T959V using xda app-developers app

jeffsf said:
Battery calibration by deleting the file is now known to be complete snake oil. Confirmed in the code as well. Deep discharge cycles, along with heat, are enemies of Li ion batteries. While it seemed a very good idea at the time, following this procedure is now known to be only detrimental to battery life, even if it makes people feel good.
Posted from my SGS4G, thanks to Team Acid development
Click to expand...
Click to collapse
So whats the proper charging way now? Thanks for the info though!
Sent from my LT26i using xda app-developers app

darkace007 said:
So whats the proper charging way now? Thanks for the info though!
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
Keep the phone between 20-85% otherwise heat will destroy the battery. Charge the phone as often as you can and avoid extra heat from charging.

help..
pls help me.after doing battery calibaration?my battery % was 0 only.how am i gonna fix that?even though i charge so many times.it get 0 % only.pls help me fix that problem.tnx

Necro-rez of a tread that has already stated "don't do this" ain't gonna fix it for you. Why don't you post what your hardware, firmware, and software are in another thread, along with very clearly detailed description of what you did and what happened (with what you expected to happen, if different).
Without that, "Not a bug" "Move along, nothing to see here."

after pressing "calibrate" from app and unplug phone from charger, do i have to let the phone discharged without it being disturbed from any battery usage activities e.g. messaging, play games, browsing internet etc? or I can use the phone while it discharges? i hope to not defeat the purpose of calibrating the battery.

adhawk said:
i hope to not defeat the purpose of calibrating the battery.
Click to expand...
Click to collapse
There is no purpose for this kind of "battery calibration" process. It has been thoroughly debunked. It is generally accepted, however, that deep cycling of the batteries shortens their lifespan.

do i need to charge it off, after draining the battery ?

[Q] is it goot to charge the mobile frequently or only after battery drain?

hhi,
is it goot to charge the mobile frequently or only after battery drain?

shellx said:
hhi,
is it goot to charge the mobile frequently or only after battery drain?
Click to expand...
Click to collapse
Lifehacker had an article on this a few months ago. It was more detailed than this but the main idea I gathered from the article was to charge it to around 90% then let it discharge to about 40% then charge it back to 90ish. Also avoid charging it/unplugging it often. I deliver pizza so I suck at abiding by those rules Cuz I'm in and out of my car so much.
Ps. I leave my laptop on and plugged in all the time and after a year it won't hold a charge at all. So I'm thinking leaving it charging after its fully charged might be the worst thing to do. Hope I helped.
Sent from my Galaxy Nexus using xda app-developers app

Please enjoy this awesome article.
Honestly, a big part of the reason I went for the Samsung Galaxy SIII is because I don't have to worry about babying the battery; a battery that will inevitably lose charge no matter what. If/when it gets old/abused enough to bother me, I can just get a new one if I'm still using the phone then. :good:

HELPPPPP

hi all
i was working with my tab and set the clock to wake me up in the morning,
now i woke up and i see the tab is power down, but its not back,
no turning on,no recovery , and no downloading,
BUT,when i push power+Vol.down(downloading mod) with a RED line it says : Low Battey.Cant download!
but my battery was between 20 and 30 %...
guys pleas help me

rezadentevil said:
hi all
i was working with my tab and set the clock to wake me up in the morning,
now i woke up and i see the tab is power down, but its not back,
no turning on,no recovery , and no downloading,
BUT,when i push power+Vol.down(downloading mod) with a RED line it says : Low Battey.Cant download!
but my battery was between 20 and 30 %...
guys pleas help me
Click to expand...
Click to collapse
Get a good 2 Amp AC charger and leave on on charge for a good while.
After able to boot, you 'might' require a battery scaling calibration. I have posted a guide in General section for that (link in signature).
Best of luck
Sent from my GT-I9500 using XDA Premium 4 mobile app

UpInTheAir said:
Get a good 2 Amp AC charger and leave on on charge for a good while.
After able to boot, you 'might' require a battery scaling calibration. I have posted a guide in General section for that (link in signature).
Best of luck
Sent from my GT-I9500 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thanx UITA
its u again who helped me,
thanx alot

rezadentevil said:
Thanx UITA
its u again who helped me,
thanx alot
Click to expand...
Click to collapse
I hoping for your sake the tab will revive. fingers crossed
Sent from my GT-I9500 using XDA Premium 4 mobile app

UpInTheAir said:
I hoping for your sake the tab will revive. fingers crossed
Sent from my GT-I9500 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
thnx bro
its alive again.
what was the problem?

rezadentevil said:
thnx bro
its alive again.
what was the problem?
Click to expand...
Click to collapse
If you're referring to your problem posted here, I guess the
Don't let the battery discharge completely : potential to damage the battery and/or the battery fall "asleep" (internal safety circuit opens) with the charger then unable to service the battery.
Click to expand...
Click to collapse
.
A good 2 Amp AC charger can often "kick-start" the dead battery, but not always.
As far as the cause, I can only guess; app or process causing wake-lock > battery drain, or perhaps a battery scaling issue as I described in my thread : [TWEAK] SGT 7.7 Battery Calibration [Fuel Gauge Reset]
My tab would discharge to approx 30-35% then drop to around 10-11% almost instantaneously, sometimes shutting off if I wasn't paying close attention !
Click to expand...
Click to collapse
Glad it's sorted

UpInTheAir said:
If you're referring to your problem posted here, I guess the .
A good 2 Amp AC charger can often "kick-start" the dead battery, but not always.
As far as the cause, I can only guess; app or process causing wake-lock > battery drain, or perhaps a battery scaling issue as I described in my thread : [TWEAK] SGT 7.7 Battery Calibration [Fuel Gauge Reset]
thanx alot bro,
I dont know how to say thanx,
I went into setting/battery and I saw the batter Guage up there, I saw untill when I was awake it went up and down, and after that when I slept , with a straight line it goes down,green,yellow and red...
but I cant understand I did that before untill my tab turned off but its turned on with 17% of battery,even a few times I did it and tab comes up,, but this time I didnt by the mean, it did it by it self
what happend to it , it didnt turn on,
what was that about? how app could do that? how did that happend?
Glad it's sorted
Click to expand...
Click to collapse
I am so sorry about my english :'(

UpInTheAir said:
If you're referring to your problem posted here, I guess the .
A good 2 Amp AC charger can often "kick-start" the dead battery, but not always.
As far as the cause, I can only guess; app or process causing wake-lock > battery drain, or perhaps a battery scaling issue as I described in my thread : [TWEAK] SGT 7.7 Battery Calibration [Fuel Gauge Reset]
Glad it's sorted
Click to expand...
Click to collapse
hi UITA
i have a big problem.
my original charger is broken, i used my HTC wildfires charger,5V / 1A
i bought a new Tab charger 5V / 2A .it charget my tab 15 to 100 in 7 hours. i tought its broken too
but for 3weeks i used again the Htcs charger,
i bought a new charger 2 days ago. now my tab is plugged in about 3 hours and from 6% its just 45%.
i did reset the guage from the way that u told me .
whats the problem here?
with the HTC charger tab will charge in 2 or 3 hours but with 2A chargers its go long as before.
what should i do?

rezadentevil said:
hi UITA
i have a big problem.
my original charger is broken, i used my HTC wildfires charger,5V / 1A
i bought a new Tab charger 5V / 2A .it charget my tab 15 to 100 in 7 hours. i tought its broken too
but for 3weeks i used again the Htcs charger,
i bought a new charger 2 days ago. now my tab is plugged in about 3 hours and from 6% its just 45%.
i did reset the guage from the way that u told me .
whats the problem here?
with the HTC charger tab will charge in 2 or 3 hours but with 2A chargers its go long as before.
what should i do?
Click to expand...
Click to collapse
I'm not 100% sure of all your details, but sounds like the battery has an issue and starting to die.........
I would :
1. Flash all to completely stock firmware and kernel (to rule anything out)
2. Turn device off and leave off
3. Leave on AC charge overnight
4. Once fully charged, use as stock for a while. Battery will re-calibrate itself after a few charge cycles (if it's ok)