Develop Bugs

[HOW TO] Calibrate Desire Battery

Found this on another forum, I have done this a few times myself (do it whenever i flash a new rom because i always clear battery stats, can't hurt). Have found that it does top it up a fair bit. Before doing this i find my desire will drop to +-93% straight off the charger, however this keeps it 100% longer and i actually get to see the numbers 99-94%
Worth a go in my opinion because it only takes 5 mins of your time and can't hurt the phone... So any minor gain from this process is a win...
Hi *******, I understand your concern regarding battery life on your Nexus One device. The following steps should significantly extend the battery life on your phone. Please connect the phone to the charger with the phone powered on, and allow the phone to charge until the notification LED is green, indicating the device is fully charged. Disconnect the phone from the charger, and power it off. Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the notification LED is green. Disconnect the phone from the charger and power it on. Once the phone is powered completely on, power it off again and reconnect it to the charger until the notification LED is green. Disconnect the phone, power it on, and use it. You need to use this sequence only once. If the issue of battery life on our phone persists, I recommend you contact our HTC accessory department directly.
Mod Edit: There have been a few reports of damaged batteries by people on this thread. There is a chance that this MAY damage your battery. Please bear this in mind if you choose to follow the instructions above.

supportyou and the app!
Sent from my HTC Desire using XDA App

Thanks for that. At what point do you wipe battery stats? After the process is complete?

desire888 said:
Thanks for that. At what point do you wipe battery stats? After the process is complete?
Click to expand...
Click to collapse
Also wondering about this

You should wipe battery stats after its fully green (when powered off) then boot the phone back up.
You only need to do this once
I.e.
Charge till full when powered on
power off
charge till full again
boot into recovery wipe stats
boot and continue to use as normal

It works!!!
That's fantastic!
I read this topic this morning and tried immediately. Since this morning i only lost 4% until now. That's great news!
Thx a lot, man!
Sent from my HTC Desire using XDA App

thanks!!!!
battery usage is much better now!

how do you wipe batt stats?

kmetek said:
how do you wipe batt stats?
Click to expand...
Click to collapse
Via ClockWorkMod recovery

kmetek said:
how do you wipe batt stats?
Click to expand...
Click to collapse
Clockworkmod recovery -> advanced -> wipe battery stats.
Sent from my HTC Desire using XDA App

do i have to repeat that in future again?

vidler said:
You need to use this sequence only once.
Click to expand...
Click to collapse
first post

takes a long time to charge my Desire, but then i'll test this one!
Hope this will make battery life better. I have the same problem as described in first post (drops immediatly from 99% down to 93% )

Can someone suggest me how should I go about doing this if I use multiple batteries?
I'd imagine the phone can only be calibrated to 1 battery. But if I were to use another battery, would I screw up the calibration to the original batteries?
Right now as it is with moderate usage I need 3 batteries to last me through the day. :S

xNavyblue said:
Can someone suggest me how should I go about doing this if I use multiple batteries?
I'd imagine the phone can only be calibrated to 1 battery. But if I were to use another battery, would I screw up the calibration to the original batteries?
Right now as it is with moderate usage I need 3 batteries to last me through the day. :S
Click to expand...
Click to collapse
3 batteries?!
What rom are you using and how exactly are you using your phone?
I have just one battery and it lasts about 2 days with moderate use.

I am using this ROM: (sorry can't post link)
[ROM] Rooted Official HTC Android 2.2 (FroYo) ROM [Market issue fixed]
With my typical usage, I unplugged the phone in the morning from the charger, by the time I knock off from work, I would have left about may be 20%. With stock ROM and a single battery, there is no way that I could last 2 days with one single charge. My main use is web browsing, RSS, Facebook and IM. My estimation of my solid screen time is about 2-3 hours.
So I bought more battery just in case, and played with custom ROMs. I ended up using up a whole battery in 4 hours or so. Definitely something is wrong here. My gut feel is that both the ROM and batteries are suspects. Being a newbie I really need enlightenment.

Is it really needed to wipe the stats? I think I've accidently done this once already... cause the battery life is much better.

since this procedure, my battery stays at 100% since nearly 2 and a half hours now and i did 2 text messeges in between and recently checked the bat about 4 times
this couldnt be possible..
i mean the battery is almost doubled in comparison to how long it lasts before
is this possible??

yes it is possible

Dany0 said:
yes it is possible
Click to expand...
Click to collapse
but how?
i mean in this time the battery would have been dropped to arround 97
and now its still full?
i mean these are stats how are they increasing battery life? the batterylife is given from the cell itself?

Need battery advice!! -g2

Can someone please give me some advice on what to do with my battery! Only been on for about 7 hours and I'm already at 34%!! Well 33 as of now.. This is NOT normal! Only talked for about an hour total today! I always have wifi on because I don't have a data plan! -Medium usage.
-pics enclosed!
-system info/rom/kernel info!
-please help!! Thanks!
Sent from my HTC Vision using XDA Premium App

Some advice I can shed on this is having Wifi on all the time, (by all the time you mean at least 24/7), that could be a strong point why your battery life is low. Another thing is the number of apps that require data being pulled running in the background
1. Having Wifi on for the time you state is bad if you don't have a signal. Reason why is that since there is no signal for your Wifi to obtain it will continue to search and fail, search and fail which actually drains some good amount of battery being forced to repeat such a task unlike when having a steady signal it's usage becomes minimal
2. High number of data pulling apps also works the same except then have the option to change the time they pull data which can be usually found under settings/options tab
Try these out and let us know how it goes =]

xArcane1x said:
Some advice I can shed on this is having Wifi on all the time, (by all the time you mean at least 24/7), that could be a strong point why your battery life is low. Another thing is the number of apps that require data being pulled running in the background
1. Having Wifi on for the time you state is bad if you don't have a signal. Reason why is that since there is no signal for your Wifi to obtain it will continue to search and fail, search and fail which actually drains some good amount of battery being forced to repeat such a task unlike when having a steady signal it's usage becomes minimal
2. High number of data pulling apps also works the same except then have the option to change the time they pull data which can be usually found under settings/options tab
Try these out and let us know how it goes =]
Click to expand...
Click to collapse
Thanks for the info

When I have wifi on, I am always somewhere where I have wifi. I do leave it on while driving, but that's no more that a few minutes until it reconnects.
Sent from my HTC Vision using XDA Premium App

Hmmmmm
I barely noticed that you are running a custom rom. After flashing the new rom did you wipe battery stats? If not, that can actually affect battery life as all roms run differently and different data is applied to the battery stat
There are two ways to go about wiping the stats. You can boot into recovery and Wipe Dalvik Cache under the advanced settings or you can download Battery Calibration from the marketplace which in my experience is a lot easier
Battery Calibration
The instructions are inside the app on how to implement the process

I had this rom for a while but when I flashed it, I did not wipe data or anything. I decided to wipe data to give it a try and reflashed it. I charged it completely and calibrated it. I am in the process of running the battery until it dies so I can recharge it to complete the calibration process.
Sent from my HTC Vision using XDA Premium App

Be sure to post back your results and hopefully if nothing has improved I'll try again to assist you =]

Ran it last night untill it was dead and let it charge throughout the night. Testing battery life now! Will post results when at 8 hours. Would post at 7 again but I am gooing on a college visit today and won't be using it then.
Sent from my HTC Vision using XDA Premium App

DroidCell said:
Ran it last night untill it was dead and let it charge throughout the night. Testing battery life now! Will post results when at 8 hours. Would post at 7 again but I am gooing on a college visit today and won't be using it then.
Click to expand...
Click to collapse
DO NOT drain the battery until it dies!!! Just down to 15-20%, then charge to full, repeat a couple times. Over-discharge is not good for Li ion batteries.
People on here keep recommending it, or saying they do it. Its NOT a good idea, and proliferating this bad advice needs to stop. Draining the battery to dead is bad for the life of the battery. Also over-discharge can possibly render the battery unable to take a charge, requiring you to buy a new battery. It doesn't happen often, but its happened to a few different people on this phone, and other phones as well.

redpoint73 said:
DO NOT drain the battery until it dies!!! Just down to 15-20%, then charge to full, repeat a couple times. Over-discharge is not good for Li ion batteries.
People on here keep recommending it, or saying they do it. Its NOT a good idea, and proliferating this bad advice needs to stop. Draining the battery to dead is bad for the life of the battery. Also over-discharge can possibly render the battery unable to take a charge, requiring you to buy a new battery. It doesn't happen often, but its happened to a few different people on this phone, and other phones as well.
Click to expand...
Click to collapse
You seem to know a lot so i'm gonna ask ya redpoint. People say there is a built in safety zone so even when the battery is reporting as 0 it really isn't. The batteries do not allow themselves to get below a certain threshold for the reason you are explaining. Is this not true? Lots of people who know nothing of xda or cell phones in general let there phone run the whole way out for whatever reason. I would think that cell/battery manufacturers would take that into consideration.

the reason people used to tell you to drain the battery complete was based on an older battery tech that has what you would call a "memory" it needs to "memorize" it's lowest and highest point in order to calibrate the battery. Li-ions do not need that. They actually keep track of your charge cycles.
suppose it can handle 1000 cycles. on the first day, you used up 75% of your battery and put it on the charger to max. then the next day you use another 75% and do the same thing. at this point what actually happens is that the battery will count this as 1.5 cycles rather than 2 cycles. But redpoint is right.
Do NOT drain the battery completely when it's a Li-ion battery. it's old advice for old tech battery that is legit for that type of battery but not Li-ion batteries.
To calibrate your battery, you just use your phone normally. It will figure out where it is supposed to be as you use and charge it over the course of a few days.

better battery life
Notice on the graph, the screen was not on for a while though...
Sent from my HTC Vision using XDA Premium App

xsteven77x said:
You seem to know a lot so i'm gonna ask ya redpoint. People say there is a built in safety zone so even when the battery is reporting as 0 it really isn't. The batteries do not allow themselves to get below a certain threshold for the reason you are explaining. Is this not true? Lots of people who know nothing of xda or cell phones in general let there phone run the whole way out for whatever reason. I would think that cell/battery manufacturers would take that into consideration.
Click to expand...
Click to collapse
It is true that there is a built in 'safety zone' so that the battery does not drain completely to zero.
However, it is also true that this 'safety zone' can and HAS failed for some users (including some who are on these forums)
With the way that Li-Ion batteries work, and 'calibrate', there is no added benefit to draining it completely to zero. If there is no benefit, then the risk is not worth it.

DroidCell said:
Can someone please give me some advice on what to do with my battery! Only been on for about 7 hours and I'm already at 34%!! Well 33 as of now.. This is NOT normal! Only talked for about an hour total today! I always have wifi on because I don't have a data plan! -Medium usage.
-pics enclosed!
-system info/rom/kernel info!
-please help!! Thanks!
Sent from my HTC Vision using XDA Premium App
Click to expand...
Click to collapse
These ideas ran through my mind reading your post:
I. You might want to calibrate your battery. I've run into many instruction how to do this (just google the keywords: Desire Z calibrate battery), but basically the ones that do NOT require you to drain your battery to zero first, came down to this:
0. Turn Fastboot OFF!
1. Power on your Desire then connect to your Charger and Fully charge until the LED changes Green.
2. Disconnect your phone from the charger and then power off.
3. Reconnect your phone to your charger with the power off and wait for the green LED.
4. Disconnect the phone from the charger and power it on.
5. Once the phone has fully booted / ready to use ... power off again.
6. With the power off connect the phone to the charger and wait for the green LED.
7. Disconnect from the Charger then power on and use normally.
Many people seem to have greatly increased their battery life just by following those simple steps. I am currently in the process of trying it myself, but will probably need some hours before I can verify if the overall life has significantly increased.
II. You might want to install an App like "Watchdog lite" for a longterm check if you have any apps or processes, that work as a battery eater in the background.
III. if the above tips should fail, you might want to upgrade your radio and maybe also align the radio library (RIL), to match it best with your radio and ROM. But do a lot of reading and research before actually performing that task, since this is nothing for beginners and might even make things worse. This thread might be a good point to start your research.
hope that helps,
Tronar

[Q] Need help with battery

hi all , i used my htc wildfire for 8 month and at first my battery displays 100% when its full but since 3 month till now it always display around ~ 40 - 60 % and can't increase more . So someone can help me . Thx for read and sorry for my bad english

Are you using custom ROM or the stock ROM that comes out of the box(Froyo v2.2) ?
If, you are on custom rom, then you may try deleting the batterystats.bin present in /data/system. But first charge your wildfire, and if your removing your wildy from the charger after it gets the green led indicator, then wait till it reaches the 100%. In my case my wildy gets the green indicator in 90% but I wait till it reaches the 100%.
So, when you get to 100 reboot into recovery and select the option "delete the batterystats.bin" in wipe section. and then use the phone till it reaches 20% and then connect to charger but this time make sure you do not use the phone till it reaches the 100%(you may charge it when its switched-off.).
Note: charging through USB connected to PC gives a better battery life than the adapter provided for charging.
If, you are not getting 100% as previously mentioned, then also you can try deleting the file using recovery. You can download an app from market which will also do the same "Battery Calibration".

I have same problem too. My battery charge till 75 % and then stopped, i charged it on turned off and then turned on. I tried to install Battery calibration but this app doesnt let to calibrate battery till is not on 100 %. Also I tried to unroot the phone, some say that it will helo but still useless.
Sent from my Wildfire using XDA

@Justin5 : "Also I tried to unroot the phone" if you haven't unrooted it then you can try to delete the batterystats.bin file from recovery(explained in the previous post). If you have unrooted your phone, then you will have the stock Sense ROM v2.2. In that case also, your battery backup will decrease.
So, better stick to any custom rom. I am now using SplashMOD v1.6. Its fast, stable and backup is also good with some customization. You can try CM-7,RemPuzzle also(try searching in CM7 post for the stable ROM, you can read reviews to get a better idea).
Note: You haven't told of the ROM you are using.

Batterystats.bin contains information about what uses the battery doesn't it? I don't think it tells it how much charge to hold + it gets deleted everytime you wipe and flash so I don't see how deleting that file can help.
Sent from my Wildfire using xda premium

I was reading an article on this the other day in the android forums,and I believe it was saying that wiping the battery stats does absolutely nothing even in regards to calibration. I might have read wrong but I'm sure that's what it was insinuating.
one minute it works,the next it doesn't......yes that's right its the crappy xda update.

slymobi said:
I was reading an article on this the other day in the android forums,and I believe it was saying that wiping the battery stats does absolutely nothing even in regards to calibration. I might have read wrong but I'm sure that's what it was insinuating.
one minute it works,the next it doesn't......yes that's right its the crappy xda update.
Click to expand...
Click to collapse
Battery calibration does work (at least it did for me, when my battery discharged in 1 hour on my and worked normally after calibration on my tablet)

Don't shoot the messenger lol.the article (not me) was saying that just a good old discharge and recharge is enough and wiping stats is pointless. If I can find it I will link it.
one minute it works,the next it doesn't......yes that's right its the crappy xda update.

deteling the battery status can work but if the battery has some damage will stay that way, i hate the battery for the wildfire, it does not last very long...

www.xda-developers.com/android/goog...-battery-stats-does-not-improve-battery-life/
Nuff said!!

slymobi said:
I was reading an article on this the other day in the android forums,and I believe it was saying that wiping the battery stats does absolutely nothing even in regards to calibration. I might have read wrong but I'm sure that's what it was insinuating.
one minute it works,the next it doesn't......yes that's right its the crappy xda update.
Click to expand...
Click to collapse
I also noticed the difference before and after wiping the batterystats.bin when I was in SplashMOD v1.0. The backup also get increased if the battery is charged through USB till it gets 100%.
But, If the phone has been continuously used without the complete charge cycle, then the battery life will get decreased.

rajumack07 said:
I also noticed the difference before and after wiping the batterystats.bin when I was in SplashMOD v1.0. The backup also get increased if the battery is charged through USB till it gets 100%.
But, If the phone has been continuously used without the complete charge cycle, then the battery life will get decreased.
Click to expand...
Click to collapse
I'll say it again for the hard of hearing, Its not possible for batterystats.bin to affect battery life in any way.
When you go to settings/battery where it tells you what %of the battery has been used by what, that is the only information stored in batterystats.bin and nothing else, it also resets itself every single time you fully charge the phone so no need to wipe it as chances are you already have not long ago.
Yes discharging the battery fully and then recharging fully will prolong battery life, but its not always practical to do so and even if you do, all batteries will come to the end of there life sooner or later.
Sent from my Wildfire using xda premium

Desire with BCM RC4.1 Update 2, poor battery life (even with wiped battery stats)

Hi,
At the weekend I flashed the BCM ROM RC4.1 Update 2 and 4EXT recovery touch 1.0.0.5 RC5
(Can't post in that thread, I need at least 10 posts first)
I've performed the usual calibration steps (think this is right):
1) Charge to 100%
2) Power off and charge till green
3) Boot to recovery and wipe battery stats
I've just made about 5 mins of phone calls in full signal strength and lost nearly 20% of my battery.
The battery is a week old, I was getting about 18hours with my regular usage on CM7.
I tried turning off all the radios, no significant difference.
Running Watchdog, no misbehaving processes with threshold at 40%.
Can anybody help?
Thanks,
Jim.

What kind of battery did you buy ? A original htc or a Chinese ebay imitation product.
And the steps you describe for calibration won't do a thing. You should search for the calibration thread on xda. Which is a more genuine method.
Sent from my HTC Desire using xda app-developers app

Here's the battery on ebay:
Put
Code:
/itm/130712313750
on the end of ebay.co.uk
Reviews put it as a decent cheap battery.
Works perfectly with CM7, about 18hours, same as my old battery when it was new.
It doesn't, however, appear to have an ammeter or voltmeter built into it, so there is no way to get an accurate capacity off of it.
Does Android use the amps and volts metrics provided by the battery to calculate the battery stats file I wonder?
I'll look for another calibration thread then.
Ta,
J.

So far every one of the myriad duplicate battery calibration threads I've read are basically:
1) Charge the battery
2) Delete the battery stats
So I guess there is something else wrong either with my installation or my battery.
If I restore the backup of my CM7 installation I can see whether anything horrible has happened to the battery.
I could also put my old (fairly knackered) HTC battery back in and see it that also drains in 4-8 hours with BCM.
And dear god do I hate the captchas on this site. I have to refresh the thing 10 times before I see one that is even reasonably readable!
J.

Hi,
I put my original HTC battery back in and ran it with BCM today.
I pulled battery monitor widget's battery history file from the SD card and compared two normal working 9-5 days, one from CM7 and one from BCM.
Assuming that the second to last column in the battery_history.txt file is phone load (does anybody have the exact file format?)
eg:
Code:
2012/06/01|13:51:06|-59mA|85%|4016mV|24.3ºC|.111|0
If I only include the records where that value is zero and average the draw on a weekday, 9-5 I get:
CM7: -34mA
BCM: -94mA
If I once again assume the second to last column is some sort of load indicator, average load is 0.34 and the average drains are:
CM7: -71mA
BCM: -118mA
If somebody could post what the last two fields in battery_history.txt are, that would be very useful.
But so far it appears that BCM is haemorrhaging electrons for some reason.
J.

Battery Calibration[Root][No recovery][APP][02/05/13]

BATTERY CALIBRATION
Hi!
As we know when we install a new rom we sometimes have battery drain or when we flash a new kernel etc..... what is this?? this means that your battery goes to 0% very quickly!
The normal steep is goes to recovery and wipe battery stats!!
but what i do if in recovery don't appear something like wipe battery stats??
simple!! be sure that your nexus is completely charged,download this app ,, tap on battery calibration !! (after that charge your nexus without break)and congratulations.... buy a beer and make a party!!
I don't made this app.... just share it....
i will upload the link in a note pad... why?? simple.... i can't put links!!!

There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.

Shmi117 said:
There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.
Click to expand...
Click to collapse
o really?? i post that because sometimes when i flash a new kernel my battery percentage lie.... when i had for example 15% mi tablet shut down and i calibrate with this app and mi tablet shut down in 0%... normally...... and i do that always y flash a new rom or a kernel...... maybe i'm wrong .....

Shmi117 said:
There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.
Click to expand...
Click to collapse
It doesn't even need to be to zero.
Everyone should go to batteryuniversity.com and read the articles on cycling and charging li-Ion batteries. Then you will be able to make sense of conflicting advice on batteries.
Current: Note 2 - Nexus 7 - Charge
Retired: Player 5.0 - Fascinate
<><><><><><><><><><>
Read twice, flash once

ezas said:
It doesn't even need to be to zero.
Everyone should go to batteryuniversity.com and read the articles on cycling and charging li-Ion batteries. Then you will be able to make sense of conflicting advice on batteries.
Current: Note 2 - Nexus 7 - Charge
Retired: Player 5.0 - Fascinate
<><><><><><><><><><>
Read twice, flash once
Click to expand...
Click to collapse
mmmmm thanks for the page....

The myth of wiping battery stats was thoroughly debunked almost a year and a half ago. It is a 100% true statement that neither this app nor wiping battery stats in recovery has ever affected anyone's battery life or battery indication in any way, shape, or form.
Want to know why battery drains after flashing a new rom or kernel? Hint- it has absolutely nothing to do with incorrect battery stats- totally disregarding the fact for a moment that batterystats.bin has absolutely nothing to do with battery charge indication.. After flashing a new rom, your device is actually using more battery than usual as accounts are set up and synced. Likewise, after flashing a new kernel, it takes a short amount of time for the kernel to "settle."
If you still believe the myth that battery stats need to be wiped every now and again, there's an even easier way to do it than wiping in recovery or using some snake oil app... charge your device to full or near full and then unplug it from the charger. Voila- you've just successfully wiped battery stats!

Shmi117 said:
There is no need for battery calibration. Just discharge to 0% then charge back to 100% and you should be good to go.
Click to expand...
Click to collapse
This.
OP, stop posting nonsense. Seriously.

Strange battery behavior
It's actually odd, my battery started getting stuck at 100% like a week ago or so, after 11 hrs standby time and 30 mins screen-on time, it doesn't even drop 1%. However, it shuts down normally at 1%. I actually tried so many things to fix this, i opened the back cover and pulled the battery out, i let it run dead and charge it all the way up, but it just seems to like that 100% mark. Since it actually shuts down at 1%, i wanted to make sure it's completely dead, so i booted into recovery and oddly, with max brightness in twrp, it took about 15 mins for the device to completely shut down.
Any ideas what might fix this?

coolbyte9 said:
It's actually odd, my battery started getting stuck at 100% like a week ago or so, after 11 hrs standby time and 30 mins screen-on time, it doesn't even drop 1%. However, it shuts down normally at 1%. I actually tried so many things to fix this, i opened the back cover and pulled the battery out, i let it run dead and charge it all the way up, but it just seems to like that 100% mark. Since it actually shuts down at 1%, i wanted to make sure it's completely dead, so i booted into recovery and oddly, with max brightness in twrp, it took about 15 mins for the device to completely shut down.
Any ideas what might fix this?
Click to expand...
Click to collapse
Bear in mind that you optimally do not want to discharge the battery to the point of shutdown. Doing so shortens its lifespan, and can trigger the N7 to go into a hibernation mode on order to protect the battery from permanent unrecoverable damage due to a deep discharge.
Sent from my Nexus 7 using Tapatalk HD

najaboy said:
Bear in mind that you optimally do not want to discharge the battery to the point of shutdown. Doing so shortens its lifespan, and can trigger the N7 to go into a hibernation mode on order to protect the battery from permanent unrecoverable damage due to a deep discharge.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
I do know that, I just wanted to try out every thing that could fix this annoying bug.

seriously, battery calibration is for nothing and waste your data and time to download it..

najaboy said:
The myth of wiping battery stats was thoroughly debunked almost a year and a half ago. It is a 100% true statement that neither this app nor wiping battery stats in recovery has ever affected anyone's battery life or battery indication in any way, shape, or form.
Want to know why battery drains after flashing a new rom or kernel? Hint- it has absolutely nothing to do with incorrect battery stats- totally disregarding the fact for a moment that batterystats.bin has absolutely nothing to do with battery charge indication.. After flashing a new rom, your device is actually using more battery than usual as accounts are set up and synced. Likewise, after flashing a new kernel, it takes a short amount of time for the kernel to "settle."
If you still believe the myth that battery stats need to be wiped every now and again, there's an even easier way to do it than wiping in recovery or using some snake oil app... charge your device to full or near full and then unplug it from the charger. Voila- you've just successfully wiped battery stats!
Click to expand...
Click to collapse
i have a question....... i discovered this app because mi battery was giving me problems..... for example...... it charges very quickly .... and when i had mmmmm 15% my tablet just shutdown....... when i use this app, i charged my battery to 100% and i "calibrate" my battery ,and my battery works perfect again, now my tablet shutdown in 0% or something like that..... so that could be called calibration.... o what?
thanks!!

alonsoch said:
i have a question....... i discovered this app because mi battery was giving me problems..... for example...... it charges very quickly .... and when i had mmmmm 15% my tablet just shutdown....... when i use this app, i charged my battery to 100% and i "calibrate" my battery ,and my battery works perfect again, now my tablet shutdown in 0% or something like that..... so that could be called calibration.... o what?
thanks!!
Click to expand...
Click to collapse
The app has nothing to do with it as the only thing it clears is the list of processes that have operated on battery since the last full or near full charge.
The only "calibration" that an end user can perform entails a complete discharge/charge cycle. This resets the flags for the battery's internal fuel gauge.
Sent from my Galaxy Nexus using Tapatalk 2

Is there a fix for stuck battery percentage? My tablet was working fine and all of a sudden I realized it was being stuck at 100% regardless of how much I used it.

Aria807 said:
Is there a fix for stuck battery percentage? My tablet was working fine and all of a sudden I realized it was being stuck at 100% regardless of how much I used it.
Click to expand...
Click to collapse
a reboot usually fixes it

thx fo info

does that mean these two posts are crap?
http://forum.xda-developers.com/wiki/Battery_Calibration
http://www.xda-developers.com/andro...asy-way-with-battery-calibration-for-android/

dosmastr said:
http://forum.xda-developers.com/wiki/Battery_Calibration
http://www.xda-developers.com/andro...asy-way-with-battery-calibration-for-android/
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Both are outdated.
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najaboy said:
The only "calibration" that an end user can perform entails a complete discharge/charge cycle. This resets the flags for the battery's internal fuel gauge.
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This is all the recalibration the device needs.
Naja is 99% correct. It's not the only calibration you can do (you can wipe stats), but it's the only one you should need to do.
batteryuniversity.com has a couple of good articles on the care and feeding of Li-Ion batteries. There is a lot of less than accurate info that floats around about batteries. The above site is a good way to learn the difference.
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Wiping stats does nothing in terms of calibration.
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