Develop Bugs

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

[Q]Severe Battery Issue

I need to figure out exactly what's causing this battery drain. At 7PM my battery was at 100% after installing a new radio+kernel combo. I also calibrated my battery using a method I read in the Calkulin thread for his ROM. The method was as follows: After installing a new radio, rom or kernel charge the battery to 100% then physically take the battery out for 3 minutes. Boot into recovery then wipe the battery stats and dalvik cache 3 times each. Boot into Android then charge to 100%. Download a battery calibration tool use that and discharge. Anyway, I did all of this and was done by 7PM. After light use...listening to a few songs via google music...did a search using 3g...nothing too heavy. By 8:23 my battery was down to 76%. I thought this was pretty abnormal so I downloaded some extra battery tools and app watcher tools to see exactly was draining me so bad. Over the course of about 1:30 hours my battery dropped from 76% to 46%. I froze some non essential apps after checking up on them with watchdog (social hub, yahoo finance, tts service and accuweather). Decided to do a restart to see if that would help and my battery read 17%. I just noticed that it went up to 18% and it's holding steady but this is really weird...I honestly don't know what's going on and I could really use some assistance with this issue.
I forgot to post stats for the past few hours. Before I started the battery drain quest the Battery Monitor Widget said that the estimated was around -280mA. Over the course of a few hours it ranged from that to well over -600mA. After the restart it dropped to like -2mA but now it's back up in between the -400mA to -700mA range. It's slowly dropping as I type but there's no way that this is normal.

Sometimes when doing reboots messes up the battery reading. Its done that to me before. I have noticed that on ics when I flash a kernel and modem it takes me like a full day to get good battery. After I flash it my battery is pretty bad. Search for an appstore called bettery battery stats. Its on here at xda somewhere. Use that to see if your phone is sleeping properly or if an app is wakelocking your phone. Also it depends on who u ask but wiping battery stats does absoutley nothing for me. Its been said before that it doesn't work. Hope u get it straightened out.
Sent from my SPH-D710 using xda premium

thanks for the response. I've downloaded the battery stat app but I need to read up more on it to find out what the program is telling me. In your opinion what is good battery drain? I was on facebook for a second and it skyrocketed to high -600's but now it's down to about -90mA and dropping by just sitting in front of me.

musclehead84 said:
Sometimes when doing reboots messes up the battery reading. Its done that to me before. I have noticed that on ics when I flash a kernel and modem it takes me like a full day to get good battery. After I flash it my battery is pretty bad. Search for an appstore called bettery battery stats. Its on here at xda somewhere. Use that to see if your phone is sleeping properly or if an app is wakelocking your phone. Also it depends on who u ask but wiping battery stats does absoutley nothing for me. Its been said before that it doesn't work. Hope u get it straightened out.
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Clearing battery stats does work to wipe any info the os has on the battery. Just check your battery graph in settings, boot to cwm, wipe battery stats, then look at that graph again.
I know you know your fair share of info, so no disrespect man...
Sent from a phone with kNOw CiQ kOnane...

TeamERA said:
Clearing battery stats does work to wipe any info the os has on the battery. Jus check your battery graph in settings, boot to cwm, wipe battery stats, then look at that graph again.
I know you know your fair share of info, so no disrespect man...
Sent from a phone with kNOw CiQ kOnane...
Click to expand...
Click to collapse
I think he meant wiping does nothing to actually effect the life of the battery... Which, I agree. I've never seen any benefits when I've done it on my ET our my Moment.
Wiping just resets the OS's experience with the battery. Using your phone normally for 24 hours had the exact same effect.
Sent from my SPH-D710 using XDA

things were looking up as far as battery life goes. i got rid of some programs that were hogging the cpu and i was almost to around 12 hours on a single charge with light use. however, i did a reboot at around 6pm and my battery read 45% before hand. after the reboot it read 10%. do you think it has something to do with the kernel? this is the second time a reboot has jacked up my battery.

Guys
I have been having the same problem and try lots of things but what I did not try and just found out is that my phone has a 1500mHa instead off a 1800mHa Sprint store made a mistake and placed the wrong battery inside my phone.
Maybe some of the problems you guys are having is due to that fact.
Besides opening the phone there are several app that will actually tell you which battery you have I.E. Battery Monitor

Battery Fluctations

Anyone ever have issue with their battery fluctuating? It pretty much yoyos up and down without me even touching it.
I have calibrated multiple times.

brushrop03 said:
Anyone ever have issue with their battery fluctuating? It pretty much yoyos up and down without me even touching it.
I have calibrated multiple times.
Click to expand...
Click to collapse
That can come from many things. I would suggest to get BetterBatteryStats and see what drains your battery. Can also check under settings/battery to see what's draining it.

BWolf56 said:
That can come from many things. I would suggest to get BetterBatteryStats and see what drains your battery. Can also check under settings/battery to see what's draining it.
Click to expand...
Click to collapse
Well I'm not necessarily talking about battery drain. But fluctuations. it goes up and down. Drastic changes. Say 50% one sec to 70% a few minutes later. Sometimes the phone will go down to 1% and power down, but when I turn it back on charge could be 30%.

brushrop03 said:
Well I'm not necessarily talking about battery drain. But fluctuations. it goes up and down. Drastic changes. Say 50% one sec to 70% a few minutes later. Sometimes the phone will go down to 1% and power down, but when I turn it back on charge could be 30%.
Click to expand...
Click to collapse
Sounds to me like you need a clean flash. Backup your stuff, wipe everything (don't format sd), and start back fresh.

BWolf56 said:
Sounds to me like you need a clean flash. Backup your stuff, wipe everything (don't format sd), and start back fresh.
Click to expand...
Click to collapse
Yeah that's what I was thinking. Was waiting for phone to charge up some. Will report back in few minutes
edit: well it's done. Not going to install anything. At 61%

Looking at my battery graph, it's just a wave lol. Up and down. Haven't checked it that often, but at one point it went up to 71%. After 2.5hrs its still at 61% I had after flashing.
Didn't install anything,
So weird. Not sure if it's a battery or phone thing.

brushrop03 said:
Looking at my battery graph, it's just a wave lol. Up and down. Haven't checked it that often, but at one point it went up to 71%. After 2.5hrs its still at 61% I had after flashing.
Didn't install anything,
So weird. Not sure if it's a battery or phone thing.
Click to expand...
Click to collapse
Sorry, it's not very clear. Did you do a clean flash? If so, try to do the factory battery mod (a little search will get you to it). It's a manual way of reseting your battery but must be done when fully charged.
Also, when you cleared your battery stats, did you do full battery cycles?

BWolf56 said:
Sorry, it's not very clear. Did you do a clean flash? If so, try to do the factory battery mod (a little search will get you to it). It's a manual way of reseting your battery but must be done when fully charged.
Also, when you cleared your battery stats, did you do full battery cycles?
Click to expand...
Click to collapse
Yes, I wiped the System.
Yes battery stats were clear and full battery cycle. I've actually been dealing with this for almost a week now.

brushrop03 said:
Yes, I wiped the System.
Yes battery stats were clear and full battery cycle. I've actually been dealing with this for almost a week now.
Click to expand...
Click to collapse
Umm did you drop your phone? Also, check to make sure the connections are clean.
If everything fails, might be the battery itself and you would need to call your carrier.
Sent from my SGH-I747 using xda app-developers app

BWolf56 said:
Umm did you drop your phone? Also, check to make sure the connections are clean.
If everything fails, might be the battery itself and you would need to call your carrier.
Sent from my SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
Yeah, I actually have another battery, but haven't been home to get it. Going to try.
I'm at 92% now lol. Haven't touched it since my last post.

This is what my battery has been doing since i've wiped and flashed.

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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