Related
"please read any comments as some are useful"
Before you start doing this make sure you have time on your hands.
Follow it step by step...
Read the entire set of steps and comments first.
Do not deviate.
If you are having issue's with it not charging fully. "70% to 90% and no further." then begin at step 7
If you have Xrecovery installed wipe battery stats first to reset the battery cache to the defaults.
This post will not talk about apps or any odd mods.
It's here to clear up on how to properly optimize the battery in your phone.
The battery has a cache file used to set the top and bottom battery level.
Today i am gona teach you how to set it correctly using nothing more than your phone and charger.
While doing this it will also properly "cycle" the cells.
This leads to the final part of my guide.
Damaged batteries.
If your life on the battery when using only airplane mode.
Is very bad.
Then you should be careful.
1. Check for any swelling or deformation on the battery.
2. Battery gets very warm while charging on standby in airplane mode.
If found Discontinue guide and replace with new battery.
And calibrate again from step 1.
-Enjoy
1. Charge your phone fully to 100%
2. Plug out your charger & switch off your phone.
3. Remove the battery and plug in the charger.
4. Re-insert your battery
This is sets the top end battery parameter to a higher state allowing for further charging.
Should read 88% now.
5. Keep a eye on your phone as it charges!!!
Remove the back plate and feel if it's getting hot "it should not be a issue"
6. Repeat steps 1 to 5
Repeat this no more than 2 to 5 times till the battery will not charge further
A few extra may be required...
The battery may get stuck at 70% to 99% "most of the time 88%"
The cells have now reached full potential
IF in the case that it keeps charging after the 4th time your battery is fully optimized Enjoy, Continue with step 7
7. Let your phone run down it's battery
Don't use the phone aggressively
Leave it till it switches itself off
Now it has marked the very lowest point of the cell in the cache
8. Don't leave the battery empty, begin charging as soon as possible.
If your phone does not switch on right away.. relax.
Just leave it on charge for about a hour "will switch itself on"
9. Repeat steps 7 and 8 a few times.
You will notice each time that the battery may charge just slightly bellow 100%
Getting closer to 100% each time
10.Soon it will read 100%
It has now marked the top charged point for the cells
If step 7&8 does not bring the battery to 100% use the battery calibration app from the market.
Don't rush.. take it calm and easy.
Enjoy your properly set, fully optimized battery.
If you are planning on flashing a new rom you can copy "data/system/batterystats.bin"
And copy it back once you are done flashing.
This way you don't lose the optimization.
The battery does have over current protection it should be just fine.
Still be careful.
This knowledge is based on direct experience building electronic projects for over 23years that require rechargeable cells and the nightmares i had with a bad x10 chipset..
REMEMBER THAT I'M NOT RESPONSIBLE IF YOUR PHONE BLOWS UP ETC.
:- final edit 2011/9/12 -:- 3:09PM
Added extra on damaged cells.
Found a few more mistakes and required details... edited.
Added a line for Xrecovery users. <<< removed this.. it's crap.
Thank you xcxa23 for showing me where the battery stats file is.
LET me MAKE this 100% CLEAR... wiping stats = nothing
This guide cycle's your battery, by correctly setting the upper and lower parameters of the cell.
[GUIDE] X10 Battery Calibration arent this the same? if you wanted to do it manually, u can go to data/sytem and delete the batterystats.bin file. but of cos u had to wait till 100% before u delete the file
nice one OmegaRED^....
ahaks..i already read it somewhere at Development Section..but never try it..
xcxa23 said:
[GUIDE] X10 Battery Calibration arent this the same? if you wanted to do it manually, u can go to data/sytem and delete the batterystats.bin file. but of cos u had to wait till 100% before u delete the file
Click to expand...
Click to collapse
Not a full cycle.
He missed the discharging cycle.
And a few other details.
xcxa23 said:
[GUIDE] X10 Battery Calibration arent this the same? if you wanted to do it manually, u can go to data/sytem and delete the batterystats.bin file. but of cos u had to wait till 100% before u delete the file
Click to expand...
Click to collapse
yeah it's the same but this one is ultimate lol
You may have noticed i take the time to explain exactly why you do something.
making this look less like voodoo and more like science.
Wooo... made alot of edits to this.
Same thing here...
wrong post
sorry for the inconvenience....is there a way to remove my own posts?
OmegaRED^ said:
Not a full cycle.
He missed the discharging cycle.
And a few other details.
Click to expand...
Click to collapse
So it was necessary to create a whole new thread instead of lets say, PM'ing me so that I can add the missing information? Either way, this really works to improve the battery life, and the more people know about this, the better. Going to thank you anyway.
ooidort said:
So it was necessary to create a whole new thread instead of lets say, PM'ing me so that I can add the missing information? Either way, this really works to improve the battery life, and the more people know about this, the better. Going to thank you anyway.
Click to expand...
Click to collapse
Oh.. sorry dude.
Really did not mean to steal your thunder or anything.
If you want i can have the mods delete this and you can add anything you need from here.
OmegaRED^ said:
Oh.. sorry dude.
Really did not mean to steal your thunder or anything.
If you want i can have the mods delete this and you can add anything you need from here.
Click to expand...
Click to collapse
Haha, no it's fine. Yours is more comprehensive than mine, plus you seem to know what you're talking about so I have no problem with this.
ooidort said:
Haha, no it's fine. Yours is more comprehensive than mine, plus you seem to know what you're talking about so I have no problem with this.
Click to expand...
Click to collapse
I'm thanking you. cuz you are such a good sport.
OmegaRED^ said:
I'm thanking you. cuz you are such a good sport.
Click to expand...
Click to collapse
mmmh, i like the feeling in here!
Performed as said in the OP along with a full discharge and recharge and I'm getting a lot more use out of my phone now. Use it a lot for listening to music so the battery drained quickly but not any more.
tomgus1 said:
Performed as said in the OP along with a full discharge and recharge and I'm getting a lot more use out of my phone now. Use it a lot for listening to music so the battery drained quickly but not any more.
Click to expand...
Click to collapse
Glad to be of help.
OmegaRED^ said:
Glad to be of help.
Click to expand...
Click to collapse
Will post more later once I've spent some more time with it and put my phone under more processing.
does it work with costum kernel? or it doesn't matter? i'm having some nasty battery problems..7% down it 30 minutes
Ipy219 said:
does it work with costum kernel? or it doesn't matter? i'm having some nasty battery problems..7% down it 30 minutes
Click to expand...
Click to collapse
Nope.. it does not matter.
This is not a hack or a trick.
It's simple li-ion battery science.
If it still has problems then your battery is already optimized and your problem is completely different.
This 7% in heavy usage or light usage or standby?
Ipy219 said:
does it work with costum kernel? or it doesn't matter? i'm having some nasty battery problems..7% down it 30 minutes
Click to expand...
Click to collapse
it's because u wiped battery stats on the low battery charge and didn't make a battery calibration. I had the same problem until the calibrating using another method (for me is easier, but this topic shows another way, which can probable be very effective )
Thx OP, although it was stated in another thread like noticed
Someone on XDA also done an Android app, Battery Calibration, easying the process of battery calibration/wiping.
I don't use it for calibration, just to get battery health in mV (even if you can grab it from Android System Info, Android Assistant, etc).
Still using the good ol' method of xrecovery
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
Sent from my GT-I9100 using Tapatalk
I have exactly the same issue.
Sent from HydrOG3N MOD S2.
Technology Evolves, Android Evolves.
HydrOG3N is THE Revolution.
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
I had exactly the same issue on 3 different custom roms....finally resolved by going bck to stock rom
mgxplyr said:
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
Sent from my GT-I9100 using XDA App
soraxd said:
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
Click to expand...
Click to collapse
I'll try this one more time and report back.
mgxplyr said:
I'll try this one more time and report back.
Click to expand...
Click to collapse
Sorry guys, but your method with BatteryCalibration is useless ....
If you wanna do a correct calibration, look at here http://forum.xda-developers.com/showthread.php?t=1312273
Cheers
Put back the battery on the right side.
8. Turn on the phone.
9. Pray the Battery god
And that post is just nonsense based on the old battery bump method .
jje
mgxplyr said:
The topic pretty much explains it. I've been using different modified stock roms and now I'm on the latest nightly of CM7, and I keep having this issue. After a reboot at around 50%, the battery drops to 15%. The weird part is that while I continue to use the phone, it slowly rises back up to sometimes 30% and then starts going back down. I've always cleared battery stats when flashing and calibrated (which I believe is unnecessary), but I don't know if this is a problem with the battery, the phone, or if anyone else is having the same issue?
Attached is a screenshot of battery usage. You can see I never actually charged the phone.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
i have the same problem when i use custom roms.
i have been using pure stock rom by wannam but rooted for the past week with 12 hours aday syncing and surfing the net and plenty of voice calls via viber and my battery lasts at least 16 to 18 hours.
right now i am using odexed KL3 Kernel KL2Base KL1modem 2.3.6 and it is absolutely amazing interms of battery life and performance.
http://forum.xda-developers.com/showthread.php?t=1292825
http://www.multiupload.com/06I066U6S8
i have gotten rid of all samsung craps through titanium backup. i only have samsung apps application cuz of some paid apps which are for free such as tapatalk and many more on samsung app store.
my free memory is 97mb (original rom free memory is only 27mb)
i dont use any task killers i use 1Tapcleaner pro.
JJEgan said:
Put back the battery on the right side.
8. Turn on the phone.
9. Pray the Battery god
And that post is just nonsense based on the old battery bump method .
jje
Click to expand...
Click to collapse
Maybe, you wanna share a better way to all of us ?
Are you using speeded kernel. If you are then it is because logging and debugging is off.
Sent from my GT-I9100
Completely stock phone never rooted.
Same problem.
Just sayin'
Sent from my GT-I9100 using XDA App
Got the same here, very strange, on CM7
Sent from my GT-I9100 using XDA App
This thing only happens on CM7 for me. It had 40% before reboot and like 15% after. However mine only increased to about 17% then started dropping as usual. This never happened on any stock ROMs I've tried(stock, not themed/modded stock).
Sent from my GT-I9100 using xda premium
did you
did you rsolve the problem ? how? I have the same problem and I tried more stock roms ... I don't know what tot do ....
Its nothing to do with calibration etc, its just how the fuel gauge chip works, it learns and more accurately reports usage over time. For example, if you reboot and (I can't remember the actual voltages for the S2) you have 1200mV, the chip goes, "ah, that is 15% battery." Then as you use it more, it relearns its settings and goes "aaah, my mistake 1200mV is really 30% battery. I'll display that instead."
Its been covered frequently that "calibrating" the battery of the S2 in any way but actually using it, is next to useless.
Sent from my GT-I9100 using xda app-developers app
---------- Post added at 11:05 AM ---------- Previous post was at 11:03 AM ----------
Also just noticed this thread is a year old, but hopefully it will help the poster above.
Sent from my GT-I9100 using xda app-developers app
I'm having this problem too, what did you all do besides get new phones?
Got the same here, after update stock jellybean
Had this problem, when my S2 was half a year old.
I got the original Extended Battery and that solved this issue completely.
The replacement Battery has held up since 2013
soraxd said:
[email protected] looks like a bow and arrow..
anyway guys, you need to recalibrate your battery, its not being read accuracy.
download BatteryCalibration from the market, charge your phone till 100% (not just 100% but when it beeps, that its truely at 100%), then use BatteryCalibration to calibrate your battery, and then drain it to 0.. (crank full brightness, turn on LED flashlight, blast internet radio, whatever makes it drain faster to get this part overwith), then recharge it to max.
so;
charge to full 100%
while still plugged in, run BatteryCalibration
discharge to 0%
recharge to 100%
battery successfully calibrated, you will now have an accurate reading
Click to expand...
Click to collapse
did it but it still there... phone flicks and goes off at or below 40% wont turn on again:crying:
same here and I got the 2000 mAh samsung battery back in the days but now it happens with both of them also when my phone shuts off the screen brightness start flashing weirdly
Yup, I said it. Nothing. Nada. Zip. Well, deleting the .bin file does do something...it resets the battery stats. Wanna know what else resets the stats?? Charging your phone to 100%. So, whatever benefit you saw from deleting the .bin was a placebo effect. Don't get me wrong, deleting it won't hurt anything. But it doesn't help anything either, and it certainly doesn't calibrate your battery. The only thing that file contains are stats, such as:
1. info about wakelocks
2. info about partial wakelocks
3. info about screen on time
4. info about screen brightness
I'm tempted to get into how lithium ion cells work, but that is a boring subject. I will say that li-ion cells don't have a memory to them, so there really isn't a "calibration" process. I will say that if you have piss poor battery life, you should consider the following:
1. An application/process that isn't allowing the phone to sleep correctly (keeping this general)
2. Any SamSprint firmware or derivative thereof
3. Knock it off with the overclocking. If you wanna screw with frequency tables and voltages, or let someone else do it and flash their kernel, be my guest. But don't ***** about your battery life if you do
4. YOUR BATTERY!!!!
Wanna know how I fixed the ****ty battery life on my girlfriend's Epic? I bought her a new battery I nice new shiny Epic Touch 4g battery with 20% more capacity and BAM, 2 days of battery life easily instead of 4-5 hours.
Seriously though, so many things affect not only battery life, but battery lifespan e.g. age (many users have had this phone for 1.5 years), # of charge/discharge cycles, excessive heat or cold (I bet a lot of people keep their phone in their pocket or a purse, huh?), etc. And while there may be quality control standards in the battery manufacturing process, not all batteries are equal and it's very possible that a battery was well below its stated capacity even when it was brand new.
Anyway, I'm tired and I need a coffee. I'm interested to hear others chime in and add to the discussion. Flame on! jk
Ryan
Crap! This was supposed to go in general... Mods, please move
This is what I've been saying all along. You put a battery in. You charge it. End of story.
All these people wasting literally hours upon hours on "calibrating" their battery are tools who should not be members of a development forum.
http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
zeppelin481 said:
Crap! This was supposed to go in general... Mods, please move
Click to expand...
Click to collapse
lol was gonna say, the only flaming you should get for this is for being in the wrong section!
Specialksg1 said:
lol was gonna say, the only flaming you should get for this is for being in the wrong section!
Click to expand...
Click to collapse
It was a total accident. I had a thread I was writing and the session expired. Lost the whole thing. Rewrote and didn't pay attention to the section. I expect to be flamed for it
zeppelin481 said:
Crap! This was supposed to go in general... Mods, please move
Click to expand...
Click to collapse
maybe if you drank your coffee you wouldn't make noob mistakes!
I saw you asked to be moved to general, that was my first question as well
Many people will argue that wiping battery stats is actually WORSE for battery life while using the same battery. After cycling perhaps. I think switching batteries requires a stat wipe though.
ksmullins88 said:
maybe if you drank your coffee you wouldn't make noob mistakes!
Click to expand...
Click to collapse
You're probably right. And I technically had 2 cups today, just not my usual gallon! I hope a mod moves it soon because I feel like a huge tool now...
zeppelin481 said:
You're probably right. And I technically had 2 cups today, just not my usual gallon! I hope a mod moves it soon because I feel like a huge tool now...
Click to expand...
Click to collapse
Lol! Hey at least it wasn't a completely idiotic thread like some of the people post in developement so you get at least 1 point for that... on topic... completely agree anybody that sees better battery life after Calibrating their battery just didn't use their phone as much after doing so... now maybe everybody will quit telling the people with bad battery life to calibrate and it will fix their issues...
Sent from my SPH-D700 using Tapatalk
Here we go...
Wiping battery stats has NOTHING to do with battery 'life'. It does however effect time from a full charge if charged from the epic itself.
What the file that is removed does it tell android what the battery level is for logging and status info. When something changes like the battery strength (age) or life change from the rom/kernel/tweaks then you need to delete that file or else it will assume the older setup is used as a norm. Android uses the data to tell the battery to stop charging at a level of 95ish% and also to power down at 5ish%. If these values are incorrect the phone won't keep a charge as log or power off earlier.
zeppelin481 said:
You're probably right. And I technically had 2 cups today, just not my usual gallon! I hope a mod moves it soon because I feel like a huge tool now...
Click to expand...
Click to collapse
Lmao, I hope they leave it in here just because
Sent from my SPH-D700 using XDA App
marcusant said:
Here we go...
Wiping battery stats has NOTHING to do with battery 'life'. It does however effect time from a full charge if charged from the epic itself.
What the file that is removed does it tell android what the battery level is for logging and status info. When something changes like the battery strength (age) or life change from the rom/kernel/tweaks then you need to delete that file or else it will assume the older setup is used as a norm. Android uses the data to tell the battery to stop charging at a level of 95ish% and also to power down at 5ish%. If these values are incorrect the phone won't keep a charge as log or power off earlier.
Click to expand...
Click to collapse
But this is right... sometimes if you don't clear your battery stats your phone still thinks you have, for example, say 75%, when you really have something less, like 50%. Thus when you charge it, it will think its charging to 100 from 75 rather than from 50. Leaving you 25% less battery or whatever and your phone will seem like its dying faster. Only because you haven't "fully" charged the battery. So in some cases, calibrating the battery by removing the file is neccessary.
Sent from my SPH-D700 using XDA App
Moved......NooB
marcusant said:
Here we go...
Wiping battery stats has NOTHING to do with battery 'life'. It does however effect time from a full charge if charged from the epic itself.
What the file that is removed does it tell android what the battery level is for logging and status info. When something changes like the battery strength (age) or life change from the rom/kernel/tweaks then you need to delete that file or else it will assume the older setup is used as a norm. Android uses the data to tell the battery to stop charging at a level of 95ish% and also to power down at 5ish%. If these values are incorrect the phone won't keep a charge as log or power off earlier.
Click to expand...
Click to collapse
This. End of story, wiping does help in certain cases.
Sent from my SPH-D700 using xda premium
Next time someone complains about battery life I'm gonna tell em to order an epic touch battery, its really the only way
Sent from my SPH-D700 using xda premium
Battery stats do nothing... I never charge my battery. I swap out with charged batteries. You can NOT make your power on time longer with battery stats!!! I've proved that with swapper batteries versus charging and wiping stats... It's a myth only because there is a file which tracks status. That file is rewritten to and reset everytime I swap batteries.
IT'S A MYTH!!!
Sent from my SPH-D700 using XDA App
troyolson92 said:
Battery stats do nothing... I never charge my battery. I swap out with charged batteries. You can NOT make your power on time longer with battery stats!!! I've proved that with swapper batteries versus charging and wiping stats... It's a myth only because there is a file which tracks status. That file is rewritten to and reset everytime I swap batteries.
IT'S A MYTH!!!
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
This. The battery stats contain nothing about your battery percentage. Those who think that are misinformed.
I thought the percentage is directly related to the voltage left on the battery. So how could any stats affect that?
xopher.hunter said:
Next time someone complains about battery life I'm gonna tell em to order an epic touch battery, its really the only way
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
Look out! Here comes the Peanut Gallery! But seriously, my point was that most people don't stop and think for even a second that their battery might be the problem. If you have a 2 year old battery that you've put through the ringer and it you are getting ****ty battery life, you should quit being a cheap ass and buy a new battery. The Epic Touch battery is $18 on Amazon and a 20% increase in capacity. Kind of a no brainer. Unless you're a cheap ass. Or slow. Or you think that wiping a binary file will magically fix it. Or you're a cheap ass.
Hello,
I use Tytung's ICS 4.0.4 for my T-Mobile HTC HD2 (NAND), I've been using this ROM for months.
As such there is no problem with functioning of the ROM.
But my battery drains at a very fast rate. With 6hrs of use it drains to 20% at lowest brightness and no major applications running (2 applications in background at most).
Data enabled (2G).
What to do? Please help!!
Sent from my T-Mobile HTC HD2 using XDA Premium.
Can you download CurrentWidget from the Play store and give a value in mA? If you mean 6hrs without any usage then that's pretty poor. Try turning on airplane mode to determine whether it's an app or one of your connections that's causing the problem.
In currentwidget, the values should be approximately 4mA drain in standby with any connections enabled and 2mA in standby in airplane mode. Screen on drain varies a lot more.
OK, thanks. will revert back soon.
With screen OFF, networks ON, 2g enabled....drain is 6mA.
With screen OFF, airplane mode ...drain is 5mA.
Sent from my T-Mobile HTC HD2 using XDA Premium.
That's high but shouldn't be causing a drain of 20% in 6 hours. It's probably just draining a lot when you're using the phone, and there's not much you can do other than turning the brightness down which you've done already.
try wiping battery stats through recovery...fully charge your battery then wipe stats and let your battery to get fully discharge before you connect it to a charger for about a week...My battery never lasted more than a half day before doing this...now it lasts more than a day...Hope this works
Okz.. will try this..hope this works.
Sent from my T-Mobile HTC HD2 using XDA Premium.
eliaskammas said:
try wiping battery stats through recovery...
Click to expand...
Click to collapse
I wonder if this myth will ever die..
Google engineer Dianne Hackberry has talked about several myths about the Android operating system, including wiping battery stats.
The reasoning behind that piece of advice was something like this: If you, at some point, did not charge your Android device fully (for example, only to 80%), it would supposedly remember that battery level as “fully charged” – in this case, you’d only ever get to use 80% of your battery, which is of course less than optimal. So, if you wipe the battery stats, usually done in ClockWord Mod Recovery, the device would “forget” the previous level, here 80%, and instead charge to the full 100% once again, thereby re-calibrating the battery. Or, as Hackborn puts it in more technical terms:
The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory.
However, as she explains, that’s not the case. Because those battery stats, stored in the batterystats.bin file, are only used to maintain information about what is using the battery when not recharging. That is, it essentially holds the information displayed in the Settings > Battery screen. Nothing more, nothing less. Thus:
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
What’s more, you’ve probably noticed that the battery usage data is reset once you recharge your device anyway. From this you can correctly deduce that the battery stats are wiped as well – every time your device is recharged. More or less every day. If there was any effect, you would’ve noticed it without going into recovery and doing that stuff. Typical placebo, eh?
---
I’m as confused as a baby in a topless bar...
^Whenever someone asks 'how do I reduce my battery drain', ten people immediately jump in with 'CALIBRATE!!11oneeleven!'. No hate directed at whoever posted that advice here, I understand how easy it is to be misinformed (as I was about using SetCPU ), I just think that rumours like this are too easily presented as facts.
NYLimited said:
I wonder if this myth will ever die..
Google engineer Dianne Hackberry has talked about several myths about the Android operating system, including wiping battery stats.
The reasoning behind that piece of advice was something like this: If you, at some point, did not charge your Android device fully (for example, only to 80%), it would supposedly remember that battery level as “fully charged” – in this case, you’d only ever get to use 80% of your battery, which is of course less than optimal. So, if you wipe the battery stats, usually done in ClockWord Mod Recovery, the device would “forget” the previous level, here 80%, and instead charge to the full 100% once again, thereby re-calibrating the battery. Or, as Hackborn puts it in more technical terms:
The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory.
However, as she explains, that’s not the case. Because those battery stats, stored in the batterystats.bin file, are only used to maintain information about what is using the battery when not recharging. That is, it essentially holds the information displayed in the Settings > Battery screen. Nothing more, nothing less. Thus:
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
What’s more, you’ve probably noticed that the battery usage data is reset once you recharge your device anyway. From this you can correctly deduce that the battery stats are wiped as well – every time your device is recharged. More or less every day. If there was any effect, you would’ve noticed it without going into recovery and doing that stuff. Typical placebo, eh?
---
I’m as confused as a baby in a topless bar...
Click to expand...
Click to collapse
LOL i was just gonna post but ya beat me to it
i will just add the link to the xda news post about it
http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
Nigeldg said:
^Whenever someone asks 'how do I reduce my battery drain', ten people immediately jump in with 'CALIBRATE!!11oneeleven!'. No hate directed at whoever posted that advice here, I understand how easy it is to be misinformed (as I was about using SetCPU ), I just think that rumours like this are too easily presented as facts.
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And I shall not tell you how many times I did erase that bloody file before I too learned the truth. :crying:
Kameirus said:
LOL i was just gonna post but ya beat me to it
i will just add the link to the xda news post about it
http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
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Want me to go back and erase it for ya? No biggie...
Lol...
When one doesn't know a thing, he can be easily fooled about it.
Anyways ...Learnt something new today... :thumbup:
Thank you everyone.
Sent from my T-Mobile HTC HD2 using XDA Premium.
NYLimited said:
Want me to go back and erase it for ya? No biggie...
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LMAO no
sonalikagaur said:
When one doesn't know a thing, he can be easily fooled about it.
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As I said to Nigeldg in an earlier post:
NYLimited said:
And I shall not tell you how many times I did erase that bloody file before I too learned the truth. :crying:
Click to expand...
Click to collapse
sonalikagaur said:
Anyways ...Learnt something new today... :thumbup:
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Click to collapse
And that is all that's important.
to sonalikagaur....
obviously as the guys say don't bother trying my advice
to everyone...
at least now I know not to tell anyone about battery stats again...but now there is a wonder in my head...what made my battery last longer than it did before? I wasn't kidding that it lasts half a day longer than before...obviously battery stats didn't make the job...what did.? :-/
eliaskammas said:
to sonalikagaur....
obviously as the guys say don't bother trying my advice
to everyone...
at least now I know not to tell anyone about battery stats again...but now there is a wonder in my head...what made my battery last longer than it did before? I wasn't kidding that it lasts half a day longer than before...obviously battery stats didn't make the job...what did.? :-/
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I found out something.... usually I used to keep my 2G ON the whole day...but when I switched my data OFF when not in use...my 6hrs...20% battery remaining changed to 8hrs..n 75% remaining.
That's a huge difference.
Can anyone suggest a good app for this? Switching my data OFF automatically when not in use .!!
Sent from my T-Mobile HTC HD2 using XDA Premium.
I think Juice Defender has this functionality built in.
sonalikagaur said:
I found out something.... usually I used to keep my 2G ON the whole day...but when I switched my data OFF when not in use...my 6hrs...20% battery remaining changed to 8hrs..n 75% remaining.
That's a huge difference.
Can anyone suggest a good app for this? Switching my data OFF automatically when not in use .!!
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Click to collapse
I would guess that many so called "battery saver" apps might have it, not really sure.
I don't turn off data when not in use automatically but I do use Tasker to turn it off for several hours while I sleep.
NYLimited said:
I would guess that many so called "battery saver" apps might have it, not really sure.
I don't turn off data when not in use automatically but I do use Tasker to turn it off for several hours while I sleep.
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Yeah Tasker can do this but it's a paid app. Juice Defender is free and can also do the same thing in this case. I agree that Tasker is awesome but not necessarily for saving battery, more for ease of use.
Nigeldg said:
^Whenever someone asks 'how do I reduce my battery drain', ten people immediately jump in with 'CALIBRATE!!11oneeleven!'. No hate directed at whoever posted that advice here, I understand how easy it is to be misinformed (as I was about using SetCPU ), I just think that rumours like this are too easily presented as facts.
Click to expand...
Click to collapse
Could your go into more detail about you're previous misinformation about SetCPU?
Sent from my ZeJstersHD2 using xda premium
I need some suggestions on how to calibrate the battery on my n4. It got miscalibrated when I did the update 4.2 to 4.3 and I haven't been able to calibrate it since then, a week ago.
I tried using battery calibration from the store but it didn't work, I tried charging the phone from 0 to 100 and it didn't work.
I remember I had the same problem 2 years ago with my Atrix and I solved it by wiping the battery stats from recovery, but now twrp and Cwm removed this feature and I don't know how to solve my problem.
Maybe it would help flashing all back to stock with the toolkit?
If you have any suggestions I'd really appreciate it.
http://forum.xda-developers.com/showthread.php?t=1460553
qoolix said:
http://forum.xda-developers.com/showthread.php?t=1460553
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Just the answer I didn't expected, and frankly a pretty useless answer, everybody knows that battery calibration doesn't improve battery life.
But I have other problems, like I turn off my device at 80% and when I turn it on it's at 77%. Do you think that's normal?
Elwood_It said:
Just the answer I didn't expected, and frankly a pretty useless answer, everybody knows that battery calibration doesn't improve battery life.
But I have other problems, like I turn off my device at 80% and when I turn it on it's at 77%. Do you think that's normal?
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Either faulty battery or do the following:
1.Completley discharge N4
2.Charge fully(+2 hours after hitting 100&) WITHOUT disconnecting from the charger.
3.Repeat for better results.
Sent from my Nexus 4 using xda app-developers app
failly said:
Either faulty battery or do the following:
1.Completley discharge N4
2.Charge fully(+2 hours after hitting 100&) WITHOUT disconnecting from the charger.
3.Repeat for better results.
Sent from my Nexus 4 using xda app-developers app
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Click to collapse
Thanks for the answer. Should I carghe while it's off or on or it doesn't matter?
Elwood_It said:
Thanks for the answer. Should I carghe while it's off or on or it doesn't matter?
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To be honest, I don't know.
But if I would be you I would just let it charge while it's off(So the big ass white battery icon).
Let me know if you got your battery sorted after the method I posted!
Elwood_It said:
Just the answer I didn't expected, and frankly a pretty useless answer, everybody knows that battery calibration doesn't improve battery life.
But I have other problems, like I turn off my device at 80% and when I turn it on it's at 77%. Do you think that's normal?
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Click to collapse
You mean off as in all the way off? If so, then that ~3% is being used when the phone boots.
korockinout13 said:
You mean off as in all the way off? If so, then that ~3% is being used when the phone boots.
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I've had many phones, and none of them lost charge during the boot, at least not that many. I think that's the clear sign of battery miscalibration, I've had this problem before with another phone. Besides that, I've had a strange behaviour of the battery, for example I saw it lose 4% in 1 second, from 66 to 62 in a blink of an eye.
Elwood_It said:
I've had many phones, and none of them lost charge during the boot, at least not that many. I think that's the clear sign of battery miscalibration, I've had this problem before with another phone. Besides that, I've had a strange behaviour of the battery, for example I saw it lose 4% in 1 second, from 66 to 62 in a blink of an eye.
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It's not that it's losing charge quickly, it's just the OS (or the hardware itself) doesn't always do the best job of reading it. There's not much you can do about that, and it's really not an issue unless you make it so by staring at your battery level all day.
korockinout13 said:
It's not that it's losing charge quickly, it's just the OS (or the hardware itself) doesn't always do the best job of reading it. There's not much you can do about that, and it's really not an issue unless you make it so by staring at your battery level all day.
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Hi,
I'm having a similar issue. Phone rebooting to weird battery levels (not the %age it shutdown at).
Phone shutting down at 31% battery and rebooting to 0%.
I tried charging only to 100% yesterday with the phone ON.
Do I have to charge it even after it's charged to 100%?
failly said:
To be honest, I don't know.
But if I would be you I would just let it charge while it's off(So the big ass white battery icon).
Let me know if you got your battery sorted after the method I posted!
Click to expand...
Click to collapse
I tried charging through the night and then discharging it completely and charging it completely again. I also tried deleting the batterystats file (even though I know it doesn't do anything)
So what do you suggest I should do? Get the phone replaced or get the battery changed?
I live in India and the phone is from Canada, so replacing the phone will take some time but I can get the battery replaced for around $20
Also my nexus is also showing +ve mA values while it's not charging, and the values are absolutely crazy, +268, +168, +1171 (in batter monitor widget)
Please tell me what I should do.
japmeet said:
I tried charging through the night and then discharging it completely and charging it completely again. I also tried deleting the batterystats file (even though I know it doesn't do anything)
So what do you suggest I should do? Get the phone replaced or get the battery changed?
I live in India and the phone is from Canada, so replacing the phone will take some time but I can get the battery replaced for around $20
Also my nexus is also showing +ve mA values while it's not charging, and the values are absolutely crazy, +268, +168, +1171 (in batter monitor widget)
Please tell me what I should do.
Click to expand...
Click to collapse
Before you replace the battery try to disconnect the battery's flex cable and reconnect it [after you charge to device to 100% and turn it off of course] check if its 'reset' the battery.