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[Q] Battery issue on Nexus S

Ok Yesterday I charge my phone it said it was fully charge I took it off the charger and immediately went from 100% to 97% did it again today. Is there any way to fix it or does the battery need to be replace??

Nevermind I found my answer sorry guys!

i have the same proplem
can u tell me how can i fix it

Its in the FAQs. Its a safety feature of the phone
Sent from my Nexus S using XDA App

do u mean cant I fix it or what

please i need someone answer me

there is no fix for this yet.

RogerPodacter said:
there is no fix for this yet.
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Click to collapse
Fix? It isn't a problem. It's intended to be like that as a measure for safety.

This is supposed to enhance the life of the battery. So you will not get 100% unless you bump charge. This is just a feature no need to be worried.
Sent from my Nexus S using XDA App

zephiK said:
Fix? It isn't a problem. It's intended to be like that as a measure for safety.
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i know people think that, but i dont believe it for a second. its just an inherent trait of the type of battery driver used by samsung on some of their phones.

RogerPodacter said:
i know people think that, but i dont believe it for a second. its just an inherent trait of the type of battery driver used by samsung on some of their phones.
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Click to collapse
its used by HTC too and probably others. if you know things about battery, its there for your safety
HTC EVO 4G has this feature as well
http://forum.xda-developers.com/showthread.php?t=745581
http://forum.xda-developers.com/showthread.php?t=991983
http://forum.androidcentral.com/dro...-problem-does-exsist-all-android-devices.html
http://forum.xda-developers.com/showthread.php?t=921170
just search "bump charging" and you'll see that its not just samsung. ITS THERE for your safety.
heres the article phandroid did
http://phandroid.com/2010/12/25/you...is-lying-to-you-and-its-not-such-a-bad-thing/
The steep drop in reported battery seen past the 6.5 hour mark shows the phone being unplugged. While the current draw does increase at this point (since the phone is being used), it still cannot account for the reported 6% depletion in 3 minutes. It should also be obvious that maintaining a 100% charge state is impossible given the long spans in which the phone is only operating on battery power.
Now we can see that the 6% drop after unplugging is simply the battery gauge catching up with reality.
The phone manufacturers essentially have three choices:
1. Use older charging styles which actually maintain a full battery, thereby decreasing its eventual life
2. Use new charging methods and have an accurate battery gauge
3. Use new charging methods and have the inaccurate battery gauge
Click to expand...
Click to collapse

zephiK said:
its used by HTC too and probably others. if you know things about battery, its there for your safety
HTC EVO 4G has this feature as well
http://forum.xda-developers.com/showthread.php?t=745581
http://forum.xda-developers.com/showthread.php?t=991983
http://forum.androidcentral.com/dro...-problem-does-exsist-all-android-devices.html
http://forum.xda-developers.com/showthread.php?t=921170
just search "bump charging" and you'll see that its not just samsung. ITS THERE for your safety.
heres the article phandroid did
http://phandroid.com/2010/12/25/you...is-lying-to-you-and-its-not-such-a-bad-thing/
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Click to collapse
Just look at the battery work I did with others in my sig. I know about all those topics you linked, but they are a completely different issue than this nexus s issue.

Just got Sensation.. need to condition battery?

I just got the Sensation, loving it so far... it came with ~ 40% battery so I'm charging it for the first time now, is there anything special I have to do? Leave it charged for a certain amount of time? Does it hurt if I don't charge it all the way to 100% the first time?
Also, what's the easiest way to tell which panel (Sharp or AUO) LCD screen I have?
thanks!

There's a lot of ways people say. I have tried several and went from the way I use to do them. I have a replacement atm and its charging fully with the phone off.
I use to - charge - kill - charge - kill - then use it however. I've never had battery problems before with all the years of doing this method. I try the ways here and now I have them. I'll stick to my original from now on.

Personally, Just do a full charge when you go to bed. Wait for S-OFF. Flash a more optimized ROM, (Hopefully we will see Cyanogenmod 7). People are all really tedious about this whole battery thing. Li-Ion battery's are wonderful. Just use it. and When you see your battery in the red. Charge it.

xamadeix said:
Personally, Just do a full charge when you go to bed. Wait for S-OFF. Flash a more optimized ROM, (Hopefully we will see Cyanogenmod 7). People are all really tedious about this whole battery thing. Li-Ion battery's are wonderful. Just use it. and When you see your battery in the red. Charge it.
Click to expand...
Click to collapse
thanks... I cannot wait for CM7

these batteries do not need to be conditioned... In fact deep cyling is bad for them.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

http://forum.xda-developers.com/showthread.php?t=1169979
Says a lot here

Exactly, lithium ion batts don't need any special treatment or even an initial charge. A battery calibration every once in a while or with a new ROM is a good idea but that's a software issue not the battery itself.
Sent from my HTC Thunderbolt

great, thanks for the responses guys

Conditioning is misunderstood for building battery stats. While li-ion batteries don't need conditioning, phone DOES need to build battery stats. It doesn't matter how you do it with first charge, but DO run phone through a few full 0-100-0 cycles. It builds correct stats.

Just charge it and use it. As most of the guys above said, these batteries do not need any conditioning. What people are referring to when they say battery conditioning, is the OS's battery meter. The OS won't always give you an accurate reading eg: saying the battery is low when it isn't, or saying the battery is fully charged when it's not.
When people flash roms, a lot of the time their battery readings will be a little off at first and people would freak out, and so started this whole battery calibration bull crap. Oh, G1, those were the days.

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.
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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 ?

Anker battery 'ageing'. What does it mean?

I am using the Anker 1900mAh battery for last 3 weeks and I am satisfied with the battery life it provides. I did 4-5 charge-discharge cycles and now I regularly get 24hrs - 27hrs life out of it. Today I noticed that BMW Pro is showing battery '14% aging'! What does this mean? Is my battery dying? To confirm I installed the HTC battery widget and it shows nothing abnormal. Please check the screenshots. Is something wrong with my battery?

More than 100 views. Nobody?

My aging says 0%, on stock battery... 5 month old.

I gave up using BMW after getting my sensation, the battery driver by HTC is useless and the statistics the driver gives to BMW can't be trusted.
If you're that concerned then charge to 100%, delete your your battery stats and history and hence start again - but I don't think anything has changed for you, it still guesses your battery as around 1900.

boomboomer said:
I gave up using BMW after getting my sensation, the battery driver by HTC is useless and the statistics the driver gives to BMW can't be trusted.
If you're that concerned then charge to 100%, delete your your battery stats and history and hence start again - but I don't think anything has changed for you, it still guesses your battery as around 1900.
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Click to collapse
Absolutly right about BMW and Sensation. BMW Useless and confusing only. Don't worry about ageing - continue to use as before.

My phone is not rooted. So I cant delete battery stats. And I get excellent battery life. But the 'aging' thing was worrying me. But after reading your comments not so much worried now. What does 'aging' mean anyway? i.e. in the context of the battery.

Over time and use batteries age... They lose their capacity.... Aging 10% Means that the battery has 10% less capacity than it had when it was new....
Sent from my HTC Sensation

zcdg said:
Absolutly right about BMW and Sensation. BMW Useless and confusing only. Don't worry about ageing - continue to use as before.
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Click to collapse
There's nothing wrong with the app, it worked perfectly on my HD2, it's just the battery driver that's the issue for the sensation.

boomboomer said:
There's nothing wrong with the app, it worked perfectly on my HD2, it's just the battery driver that's the issue for the sensation.
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Click to collapse
I know that is Senasation's driver reporting not correct discharge current, only correct charge current. I meant BMW is useless with Sensation.
And i guess it is not problem of HTC's driver but hardware chipset used in sensation and evo 3d - driver can't read proper values from measurment circuit of chipset. If i would be driver itself, HTC could fix it easely.
---------- Post added at 08:49 AM ---------- Previous post was at 08:38 AM ----------
Don't expect from Anker same quantity of charge-discharge cycles as original battery. It may not work as long as original one(cycles i mean). Nothing can be done with it and nothing can help. They are cheap, so just buy new one when capacity will badly decrease.

Now BMW is showing aging to be 0%. How and why it showed 14% previously I dont know! The battery is hardly 3 weeks old. It cant begin to age so soon, can it? Maybe the earlier value was some wrong reporting. There seems to be a definite problem with the phone's battery driver.

As countless people told you by now - those stats don't mean ****. Stop relying on them. It's useless, confusing information with absolutely no value.
Your battery is fine.

anazei said:
As countless people told you by now - those stats don't mean ****. Stop relying on them. It's useless, confusing information with absolutely no value.
Your battery is fine.
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Click to collapse
^ What he said. If the developer set the app to say it's 99% aged while your battery still lasted about 25 hours or so.. would you believe that? I'm banking on the assumption that you're not a complete moron and WOULDNT believe that. This is almost the same thing, accrding to all the other users, the app and the battery drivers don't work well together. As everyone else has stated, stop using it? There really is only one way to test your battery properly, and that is to use it. If one day you only got like 15 hours out of your normal 27.. then you know there's a problem. screw the bmw app

anazei said:
As countless people told you by now - those stats don't mean ****. Stop relying on them. It's useless, confusing information with absolutely no value.
Your battery is fine.
Click to expand...
Click to collapse
I have understood it totally.
KAwAtA said:
^ What he said. If the developer set the app to say it's 99% aged while your battery still lasted about 25 hours or so.. would you believe that? I'm banking on the assumption that you're not a complete moron and WOULDNT believe that. This is almost the same thing, accrding to all the other users, the app and the battery drivers don't work well together. As everyone else has stated, stop using it? There really is only one way to test your battery properly, and that is to use it. If one day you only got like 15 hours out of your normal 27.. then you know there's a problem. screw the bmw app
Click to expand...
Click to collapse
Is there really any need for being this rude? I thought we were just having a discussion. Why are you getting exasperated?

sarkar_007 said:
Now BMW is showing aging to be 0%. How and why it showed 14% previously I dont know! The battery is hardly 3 weeks old. It cant begin to age so soon, can it? Maybe the earlier value was some wrong reporting. There seems to be a definite problem with the phone's battery driver.
Click to expand...
Click to collapse
Ignore, ignore, ignore. Just ignore. How can you trust it if BMW doesn't even report mA correctly (not it's fault). So stop worrying and just enjoy your phone.

tinky1 said:
Ignore, ignore, ignore. Just ignore. How can you trust it if BMW doesn't even report mA correctly (not it's fault). So stop worrying and just enjoy your phone.
Click to expand...
Click to collapse
Thats what I am going to do!

You may see what are aged battery here :http://78michel.unblog.fr/htc-desire-battery-shutdown-analysis/ and here :http://78michel.unblog.fr/?p=164
The SoC curve ( state of charge) shows a step during the charging cycle before reaching 100% and a shutdown while discharging. This is very typical.
The aging is in fact the amplitude of the step.....
A precise battery analysis requires a full charging cycle from 0% to 100% with a AC charger.
Your battery is clearly not aged at all..... don't worry

sarkar_007 said:
I have understood it totally.
Is there really any need for being this rude? I thought we were just having a discussion. Why are you getting exasperated?
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Click to collapse
How am I being rude? You should change the tone of how you read it. I didn't call you the moron, I was assuming you weren't and trying to give some kind of crappy analogy to make sense of it lol

Folks, wiping battery stats is to no use. It only contains the data of what have used the battery since last charge. When you unplug your phone from the charger, the stats are reset. You can't extend or damage the battery life by deleting/altering the battery stats file.

Battery Calib?

Hi,
Does one need to do 2-5 cycles to calibrate the battery before flashing from Color OS to CM 11S, on a new device........is it a must?
Thanks.

No, the battery's firmware-level calibration is independant of any attached device or software version.
You should just do it at the beginning of using your device since you may have poor battery performance until doing so. Note that 2-5 is absolutely overkill, you need to discharge it completely and then fully charge it in one go - done.

d4fseeker said:
No, the battery's firmware-level calibration is independant of any attached device or software version.
You should just do it at the beginning of using your device since you may have poor battery performance until doing so. Note that 2-5 is absolutely overkill, you need to discharge it completely and then fully charge it in one go - done.
Click to expand...
Click to collapse
Thanks for your expert advice. Full discharge till DEAD correct and than Full charge till 100% for my new OPO, before flashing?
Best Regards!

Micheal1122 said:
Thanks for your expert advice. Full discharge till DEAD correct and than Full charge till 100% for my new OPO, before flashing?
Best Regards!
Click to expand...
Click to collapse
You can do it after flashing too. It has nothing to do with the phone's software.
There was a myth concerning Android battery calibration Google debunked a looooong time ago and which proved to be wrong.

d4fseeker said:
You can do it after flashing too. It has nothing to do with the phone's software.
There was a myth concerning Android battery calibration Google debunked a looooong time ago and which proved to be wrong.
Click to expand...
Click to collapse
I personally think the whole battery thing is some sort of smoke and mirrors. I've read engineers stating lithium ion and polymer batteries do not like a full discharge, they prefer shallow discharges instead. Every battery thread seems to have conflicting information so take all the advice you get with a grain of salt. Charge it when you want, you'll probably replace the phone long before the charge/discharge cycles run out.

d4fseeker said:
You can do it after flashing too. It has nothing to do with the phone's software.
There was a myth concerning Android battery calibration Google debunked a looooong time ago and which proved to be wrong.
Click to expand...
Click to collapse
Thanks again for clarifying in depth.
Best Regards!

Birdsfan said:
I personally think the whole battery thing is some sort of smoke and mirrors. I've read engineers stating lithium ion and polymer batteries do not like a full discharge
Click to expand...
Click to collapse
Yes, that's true. Li-Ion batteries live the longest when kept between 40 to 70% of their maximum capacity. This also means you should not charge it to or even close to 100%.
Birdsfan said:
Every battery thread seems to have conflicting information so take all the advice you get with a grain of salt.
Click to expand...
Click to collapse
The information is not really conflicting. The chemical components (read: Lithium polymer) do not like deep discharge but the electronical component simply need a cycle now and then for best calibration and thus runtime.
This truth of seemingly conflicting information stretches across anything and everything related to electronics and beyond.
Birdsfan said:
Charge it when you want, you'll probably replace the phone long before the charge/discharge cycles run out.
Click to expand...
Click to collapse
If you replace your phone every year, yes. A typical Li-ion battery holds around 500 cycles before it starts noticeable degrading. If you use your phone enough to have it (close to) empty every single day, that will be approx 1.5 years. After 2 years it will in many cases be far below it's original capacity.