Battery recalibration after ROM update - Defy Android Development

http://www.nexusoneforum.net/forum/nexus-one-faq-how-tos/5625-calibrate-your-battery.html
RECALIBRATION:
A recalibration is mostly needed, when dealing with different kernels (ROOT!). Most custom recovery images provide the option "battery stats wipe" under the menue "Wipe".
Here is how ya do it!
1. Enter Recovery Mode
3. Enter "Advanced"-Menue
4. do "Wipe Battery stats"
5. reboot
Calibrate the battery by completely draining it until the phone completely shuts itself off.
Turn the phone on again and let it shut itself off one more time.
Then charge your phone while it is off for over 8 hours.
This will fully charge the battery so that when the Android is turned on, it now sees the battery as full.
It is recommended to repeat this process at least one more time.
You should see a significant increase in your battery’s charge life.
Calibration of a battery can be done at any point and a maintenance calibration is recommended every month.

Thanks for this useful guide

Hi,
Your posted information doesn't sound true for me. Why should recalibrating increase the battery life? The battery is full when the end voltage is reached an no more charge can be taken (4,2v @ lipo) and it is empty if the minimum allowed voltage is reached (should be with Deffy's technology 2,8v?). So why should recalibrating increase battery life?
Greetings, Jo

DOCIOHN said:
Hi,
Your posted information doesn't sound true for me. Why should recalibrating increase the battery life? The battery is full when the end voltage is reached an no more charge can be taken (4,2v @ lipo) and it is empty if the minimum allowed voltage is reached (should be with Deffy's technology 2,8v?). So why should recalibrating increase battery life?
Greetings, Jo
Click to expand...
Click to collapse
It's well known that this procedure will indeed produce better battery performance. Most devices have a similar procedure. Even HTC has given some calibration procedures in order to improve battery performance.

How do you enter Advanced Recovery? I can get my phone into recovery but that's all.

tim440 said:
How do you enter Advanced Recovery? I can get my phone into recovery but that's all.
Click to expand...
Click to collapse
Hey,
You have to user Clockwork MOD recovery, and then when inside it go to Advanced, and you will see the battery wipe option.
cheers

DOCIOHN said:
Hi,
Your posted information doesn't sound true for me. Why should recalibrating increase the battery life? The battery is full when the end voltage is reached an no more charge can be taken (4,2v @ lipo) and it is empty if the minimum allowed voltage is reached (should be with Deffy's technology 2,8v?). So why should recalibrating increase battery life?
Greetings, Jo
Click to expand...
Click to collapse
lion battery recalibration/recondition was already there long before android even existed...

Since I flashed several ROMs I tried this and I am happy! Battery consumption seems to be better after this workaround. I'm on 1.3 Ghz @ 72 Vsel with my Defy and easily reach an uptime of 2 days, mostly a bit more..
Thanks again!

There will be almost no impact on total runtime, just the percentage meter can become more accurate by "calibrating" the battery. In addition to a complete discharge (I do not encourage you to discharge more than ONE auto-off, you shorten the battery life by discharging below 3.0 V) you need to have a nearly constand discharge current on most phones for this calibration to become really accurate.
What is the effect? Well, not much. Your phone just knows better how much battery is left, so maybe the "empty batt" message @15% comes later. The usage time and the auto-off threshold are not impacted at all.
When we are talking about a battery that has been put away for months without use, you may be right. One charge-discharge-charge cycle may bring back some capacity. But this is not true for any regularly used battery.
If you care about battery life time (in months/years, not a single charge): Charging above 4,0 V has a great negative impact on it; Constantly holding the charge @ 3,5-4,0V may nearly double the life of a battery but you can only use about 50% of its capacity this way.

I'm not sure if calibration/full discharge is necessary/recommended. From many readings calibration is not necessary for lithium battery. Actually it is recommended against full discharge as lithium battery has limited full discharge/recharge cycles.

after doing research on all methods to recallibrate checking pros and cons finally i got the answer brothers...its very simple no need for cwm or drain full abttery kill your batery download recallibrate delete batterystat.bin....all fake bother....just do a simple step remove your battery for 2-5 minutes and than on it....you are recalibrated....simple

galaxyfitankit said:
after doing research on all methods to recallibrate checking pros and cons finally i got the answer brothers...its very simple no need for cwm or drain full abttery kill your batery download recallibrate delete batterystat.bin....all fake bother....just do a simple step remove your battery for 2-5 minutes and than on it....you are recalibrated....simple
Click to expand...
Click to collapse
See this screenshot.........i am charging my cell and it is showing also its charging but not even d graph nor the battery icon is increasing .
Seriously help me
see this sir...i hopwe u can help anything in this:crying:

abhinavvaidya90 said:
See this screenshot.........i am charging my cell and it is showing also its charging but not even d graph nor the battery icon is increasing .
Seriously help me
see this sir...i hopwe u can help anything in this:crying:
Click to expand...
Click to collapse
take out battery for about 10 minutes. And then try to charge again.
If you will see same problem i think you need to buy new battery.

http://forum.xda-developers.com/showthread.php?t=1443108

This is firmware problem format your phone and than it will be fine or go to stock firmware

galaxyfitankit said:
This is firmware problem format your phone and than it will be fine or go to stock firmware
Click to expand...
Click to collapse
i did but to no vail

then buy a new battery ?

buy i new battery bro...and if warranty left than go to service centre the problem also ...is your battery swelled up kya?

Related

[Q] How Many Times Did You Calibrate Your Battery Before You Gained Full Potential

I am now on my 2nd full charge. Drained completely and full charge while off. I have the battery calibration app and i use it. Im about to take my phone off the charger and put it to work.
How many times did you calibrate your battery before you got the full potential of it. I see some people are getting as much as 30+ hrs on their device while im getting 7-9 on moderate use.
I've never done that. Always read that draining lithium-ion batteries hurts the battery if done repeatedly. Instead I just charge to full then delete battery stats in clockworkrecovery. Battery has been great ever since that and a factory reset.
regP said:
I've never done that. Always read that draining lithium-ion batteries hurts the battery if done repeatedly. Instead I just charge to full then delete battery stats in clockworkrecovery. Battery has been great ever since that and a factory reset.
Click to expand...
Click to collapse
Ill keep it till tues/wed and see what happens. If I don't see improvement ill exchange once again
Sent from my LG-P999 using XDA Premium App
regP said:
I've never done that. Always read that draining lithium-ion batteries hurts the battery if done repeatedly. Instead I just charge to full then delete battery stats in clockworkrecovery. Battery has been great ever since that and a factory reset.
Click to expand...
Click to collapse
What does deleting the battery stats via ClockWork do? Do you delete them on each charge?
I was getting great battery life and then I used the calibration software and I'm getting good, but slightly less great battery life. Does uninstalling/freezing that app do anything or once it's calibrated, it's done?
The phone has a dual-core processor, and the best GPU you can get in a phone these days, so you can't expect it to get super battery life unless you never use the phone much. I did the calibration once, and have been able to go all day under moderate to heavy use. All day being 8am-7pm and still having ~20% charge.
Sadly my first g2x that I received wasn't able to go through more than 4 hours of standard use even after fully charged the 2nd time. I sent it in last Friday for exchange and now I'm waiting for the 2nd g2x to be send to me. Well see how it goes by then.
@himmelhauk - I noticed in your signature that you have the Paul O'Brien fix... I saw in that thread that that noticeably increased speed/smoothness, but I haven't heard anybody talk about its influence on their battery. Have you noticed a difference in your battery life after making that tweak?
Me
I only calibrated once, and that plus some other simple tweaks i saw great results. I usually get about 20+ hours of medium use(A few calls, non-stop texting, occasional game or youtube video, and checking email every couple of hours). If you want to see what I did you can click the link in my sig.
lobsterhead said:
What does deleting the battery stats via ClockWork do? Do you delete them on each charge?
I was getting great battery life and then I used the calibration software and I'm getting good, but slightly less great battery life. Does uninstalling/freezing that app do anything or once it's calibrated, it's done?
Click to expand...
Click to collapse
it gets rid of the battery information stored within the os so that the phone reads the battery charge correctly. this was common practice for vibrant owners after flashing a new ROM. I've seen people saying that this phone has horrid battery drivers so I dunno how that will effect the battery stats but after a factory reset and deleting the stats my battery is double what I was getting on my vibrant.
I only do this after flashing a new ROM or in this case upon getting and setting the phone up. I would do it again if I swapped the battery for a different one also. just charge to 100%, reboot into clockwork, advanced menu, wipe battery stats, done. it DOES NOT increase battery life. it only allows the phone to read the battery more accurately which would keep the phone from thinking its dying when it still has considerable charge left. that's why you hear about people seeing their battery life read 1% yet the phone last for hours.
I only calibrated once because I realized the values were off a bit.
Tried every battery trick in the book. If you actually want to use the phone, nothing will help. Android is a battery eating nightmare. Hopefully one day the platform will mature so adults can use it as a business phone. I think I am returning mine or giving it to my kid.
I did a single calibration and am now seeing 20+ hours with decent usage. Fully charge the battery, use battery calibration app to erase settings, let it drain till it shuts itself off, try pressing the power button to make sure there's no remaining charge, then fully charge to 100% with the phone still off (you can tap the power button while its plugged in and off to briefly bring up a battery indicator on the screen with out actually powering up). Its true that lithium ion batteries last longer if they don't go through fully discharge cycles, but thats referring to repeated occurances, not a rare or occasional situation. And when calibrating, draining from 100 to 0 is the best method of getting a good calibration. Additionally, while its healthy to do the mid charges most of the time, about once a month or so you should do a full drain. This helps keep the calibration accurate (remember that android will continue to modify the file, albeit at a greatly reduced level after the initial discharge of a new calibration, hence why that occasional full discharge is valuable). A full discharge once a month won't significantly reduce your battery's life expectancy.
cbowens said:
let it drain till it shuts itself off, try pressing the power button to make sure there's no remaining charge
Click to expand...
Click to collapse
Draining a li-ion battery past the safe shut off is an easy way to damage or completely kill the battery. Your phone is set to shutdown before complete discharge for this reason. The full discharge then charge method was for NiCd batteries. This has no use for lithium-ion batteries.
regP said:
Draining a li-ion battery past the safe shut off is an easy way to damage or completely kill the battery. Your phone is set to shutdown before complete discharge for this reason. The full discharge then charge method was for NiCd batteries. This has no use for lithium-ion batteries.
Click to expand...
Click to collapse
True, but the method of attempting to power back up won't actually drain it past the safe point. The point is bad calibrations (either from the factory or by an incomplete calibration) can cause the OS to shut the phone down prematurely during your new calibration run (before the actual safe cut off), resulting in the calibration being off scale. When you attempt to power the phone back on, if it is at the true safety cut off, it won't reactivate, where as if the calibration from before was skewed, it will allow it to boot back up and finish draining down to the safety cut off. This is in line with the reports of people having incorrect readings on battery %, where they have a low number, reset the phone, and suddenly seem to jump up 10 or 20%.
lobsterhead said:
@himmelhauk - I noticed in your signature that you have the Paul O'Brien fix... I saw in that thread that that noticeably increased speed/smoothness, but I haven't heard anybody talk about its influence on their battery. Have you noticed a difference in your battery life after making that tweak?
Click to expand...
Click to collapse
I honestly don't know if it made any difference on battery life, as I did the battery calibration before I installed the fix. At any rate, I get much better battery life after the calibration for certain.
Sent from my LG-P999 using XDA Premium App
cbowens said:
True, but the method of attempting to power back up won't actually drain it past the safe point. The point is bad calibrations (either from the factory or by an incomplete calibration) can cause the OS to shut the phone down prematurely during your new calibration run (before the actual safe cut off), resulting in the calibration being off scale. When you attempt to power the phone back on, if it is at the true safety cut off, it won't reactivate, where as if the calibration from before was skewed, it will allow it to boot back up and finish draining down to the safety cut off. This is in line with the reports of people having incorrect readings on battery %, where they have a low number, reset the phone, and suddenly seem to jump up 10 or 20%.
Click to expand...
Click to collapse
I dunno about this phone but I know the galaxy s can still be powered on after the safe shut off and drained completely. People were doing exactly that and messing their batteries up. I would hate for people to misunderstand your post and end up making the same mistake. So the LG doesnt let you power on after the safe shutdown unless its connected to a charger? If so thats pretty good. In any case its a lot easy to just use clockwork, terminal emulator, or any other app to delete battery stats once your charged to 100%. No need to drain first
regP said:
I dunno about this phone but I know the galaxy s can still be powered on after the safe shut off and drained completely. People were doing exactly that and messing their batteries up. I would hate for people to misunderstand your post and end up making the same mistake. So the LG doesnt let you power on after the safe shutdown unless its connected to a charger? If so thats pretty good. In any case its a lot easy to just use clockwork, terminal emulator, or any other app to delete battery stats once your charged to 100%. No need to drain first
Click to expand...
Click to collapse
I hadn't heard about the Galaxy S phones having that issue. Like I said, I came from the Eris and this method was the way to go with that phone, so perhaps its a manufacturer dependent function. In any case, I agree that the cwm method is better, but I meant my post to be accessable by those who may not have taken that particular plunge yet, since it only requires root. Thanks for the info though; its good to know in advanced that the safety shut off being unavoidable isn't a guarentee on all phones (though frankly it should be).
EDIT: Not sure if I'm reading it wrong, but it sounds like you thought I meant to drain the battery before calibrating, which isn't true; all you need to do precalibration is have the charge at 100%. The only time I was suggesting to drain it is during the actual calibration run, so that Android has a full scale of your battery's range. If thats not what you meant, than ignore this edit. Just wanted to make sure I was explaining myself correctly.
Also, if you open your battery cover and look at the battery, it's not suppose to go above 40 degrees celsius, or 104 degrees fahrenheit. I found that the temperature often goes past this, especially when watching movies for extended periods of time, or playing games, which leads to a significant decrease in battery life because heat and li-ion batteries are not a good combination.
andonnguyen said:
Also, if you open your battery cover and look at the battery, it's not suppose to go above 40 degrees celsius, or 104 degrees fahrenheit. I found that the temperature often goes past this, especially when watching movies for extended periods of time, or playing games, which leads to a significant decrease in battery life because heat and li-ion batteries are not a good combination.
Click to expand...
Click to collapse
You can use SetCPU to make a profile according to battery temperature and underclock it when it gets to 40 degrees or something. I have profiles for when the screen is off and for temperature.
lobsterhead said:
You can use SetCPU to make a profile according to battery temperature and underclock it when it gets to 40 degrees or something. I have profiles for when the screen is off and for temperature.
Click to expand...
Click to collapse
What r ur temp profiles
Sent from my LG-P999 using XDA Premium App

Battery Calibration - Once and for all!

I have read every possible thread you can imagine on battery calibration and can never seem to do this correctly, is it a myth? No matter what I do, if I restart my phone, I end up going from 100% down to 85-86% EVERY SINGLE time.
This is after "bumping it". (letting it drain all the way to 0% and then fully charging again).
This is after using BATTERY CALIBRATION in the market which was told works well. (again, advises you charge to 100% then "calibrate" it via the APP).
This is after charging it to 100% and restarting it, recharging up to 100%, restarting and recharging (repeat, repeat, repeat), and then going into bootloader and wiping battery stats.
None of these have worked, does someone have a sure fire EXACT way to do this properly or is at ALL just hype? Help.
Your battery will never say 100% after a reboot. It sucks up a lot of juice on a power up and the battery doesn't charge during powering on. I usually drop about 10% on a reboot using the rezound battery. That is normal behavior. If you can charge to 100% with the phone on then you're fine.
Sent from my ADR6400L using Tapatalk
Interesting because I've never lost 15-16% consistently although I guess it using some juice to cycle makes sense. Anyone else seen 10+ every restart? Thanks for the help man in either case.
Hmm, never seen this before. On my phone which is running skyraider uc to 768mhz and uv only loses 1percent on reboot or doesn't even lose charge at all. Not sure why your phone is doing that.
Sent from my ADR6400L using xda premium
I am running G3D uc to 768mhz and on restart I may lose 1 - 5% at most depending on if i made any changes that take a longer restart. I bet you are overclocked? no need, under clock to 768mhz and your phone will run as smooth as 1.2mhz..maybe smoother while using less battery
Running liquid 3.2.1 on my T-Bolt with the Rezound battery and I only lose 1% battery at boot up. Never lost more...oh and I have never calibrated my battery. Also I get about 8-10 hours of moderate to heavy use too. All stock clocks btw
Just to double check - or reword... do it this way - if you aren't already.
Charge to 100%.
Wipe Batt stats
Drain to zero without recharging in any way (AKA let it drain until it shuts off on you).
Recharge until 100% (till it says 100%, not just "green."). And unplug.
And you're good! Try that and check back in.
Battery Calibration doesn't work
Ignore the % number, it means nothing. Use the battery monitor widget or another program that will show you the actual battery voltage. A fully charged battery will be somewhere around 4200 mV and a discharged battery between 3600 and 3200 mV. I've also noticed that the rezound battery throws things off as the mAh rating doesn't match up to either of the thunderbolt batteries. This is why the battery monitor widget shows the rezound battery as 2750 mAh instead of 1620.
What I recommend to my Evo peeps [which I have] is this:
-Charge battery to 100%
-Wipe battery stats in recovery
-Let the battery drain, so it manually powers off
-Charge to 100% again, and good to go
Battery Calibration doesn't work
Click to expand...
Click to collapse
By this I mean Google Developers have came out recently and said battery calibration does not increase or have any effect on the state of battery life. All wiping the battery stats does is wipe the stats as to what has been using the battery, etc.
still handy for when you flash a new rom to wipe the stats, but it doesn't improve battery life at all.
smoody said:
By this I mean Google Developers have came out recently and said battery calibration does not increase or have any effect on the state of battery life. All wiping the battery stats does is wipe the stats as to what has been using the battery, etc.
still handy for when you flash a new rom to wipe the stats, but it doesn't improve battery life at all.
Click to expand...
Click to collapse
Actually, the post from Dianne @ Google said nothing about calibration. She only talked about wiping or deleting the battery stats file.
You are correct, however all the battery calibration apps available only delete the battery stats file. So like I said it doesn't affect battery life.
wherestheboost said:
Just to double check - or reword... do it this way - if you aren't already.
Charge to 100%.
Wipe Batt stats
Drain to zero without recharging in any way (AKA let it drain until it shuts off on you).
Recharge until 100% (till it says 100%, not just "green."). And unplug.
And you're good! Try that and check back in.
Click to expand...
Click to collapse
This is what I thought I had done but will do again. The problem is even after its 100% and in between your 1st and 2nd step when I reboot into recovery, it's no longer at 100% and sometimes down to 85%ish. I will try again tho, thanks!
http://rootzwiki.com/_/articles/wiping-battery-stats-is-pointless-says-google-r316
That pretty much says it. Wiping stats and calibrations are placebos.
l7777 said:
That pretty much says it. Wiping stats and calibrations are placebos.
Click to expand...
Click to collapse
Yeah I read that too. But when I flashed my first rom on the tb I got abysmal battery life. 25% in like 20 min. I recalibrated and it got so much better. If its a placebo its a good one.
Sent from my HTC ThunderBolt using Tapatalk
all that says is the the deleting the batterybin file doesn't help. The battery is handled by each by software outside of android itself. So, following the battery calibration from the manufacturer of your phone still might help.
jefferyriess said:
Yeah I read that too. But when I flashed my first rom on the tb I got abysmal battery life. 25% in like 20 min. I recalibrated and it got so much better. If its a placebo its a good one.
Sent from my HTC ThunderBolt using Tapatalk
Click to expand...
Click to collapse
25% in 20 minutes means nothing. The % is an estimated number. Find an app that reads the battery voltage if you want a true reading on the battery's charge. Full is 4.2 volts, dead is between 3.0 - 3.6 volts. Battery life should only be measured in hours from full to dead. I've seen my phone stick on 100% for several hours before as well as sticking at 20% for several hours. Ignore the %. Anyone spending all day looking at a % to judge their battery life should go back to a battery indicator that doesn't show %.

[HowTo] Calibrate your Li-ion Battery Perfectly

Many of My Friends are facing Problem With Battery as Rom shows wrong information about remaining Battery %... As a result your phone goes off and when you start your Phone again it starts to show different % battery that mean that your battery is not Calibrate.. I am making this guide so that every one on this world may enjoy their phone for long time...
Warning Do at your own RISK...! Dont do it again and again
Steps you need to Do ​-1 First thing you need to do is let your battery goes to 0%.. then again start your phone(Don't plug in charger) and repeat 1st step until your phone denies to turn on back..
-2 Then Charge your phone in Switched off mode to 100%
-3 Unplug your charger
-4 On phone
-5 Your phone is going to show % of battery lesser than 100%
-6 Charge your phone again in on mode to 100%
-7 Unplug your charger
-8 Restart your phone and repeat Steps from 4 to 8 again and again until on every restart u battery % shows about 97%to100%
-9Next step is to calibrate your battery Download free app from plat Store that is Battery Calibration
-10 Calibrate your Battery with the help of that app and make sure that your Battery % is 100
-11 After Calibration Use ur Battery Upto 0%
-12 Then Charge it again and Your battery will be Calibrated...
Enjoy..
Hit Thanks ​
shreyans4020 said:
Many of My Friends are facing Problem With Battery as Rom shows wrong information about remaining Battery %... As a result your phone goes off and when you start your Phone again it starts to show different % battery that mean that your battery is not Calibrate.. I am making this guide so that every one on this world may enjoy their phone for long time...
Enjoy..
Hit Thanks ​
Click to expand...
Click to collapse
DON'T ever do this! Discharging a Li-ion battery completely WILL decrease your battery life.
Next, the battery calibration app is nothing more but a hoax. It only deletes a file containing the battery stats which is ONLY used in the battery statistics screen in settings.
So please, DON'T!
It's true you get the same result from the battery calibrate app by wiping battery stats in recovery. Draining your battery does decrease battery life of li-ion batteries, same goes for your laptop. The theory to cycle your battery is a myth and actually wrecks your battery.
Sent from my GT-i9100 using Tapatalk 2
bugadani said:
DON'T ever do this! Discharging a Li-ion battery completely WILL decrease your battery life.
Next, the battery calibration app is nothing more but a hoax. It only deletes a file containing the battery stats which is ONLY used in the battery statistics screen in settings.
So please, DON'T!
Click to expand...
Click to collapse
The 0% reported by the operating system is actually a bit higher than the voltage at which li-ion batteries will become damaged. Any modern phone should not allow you to discharge the battery to the point where it could cause damage.
Also there was an employee from Google IIRC that said wiping battery stats was useless because its only a file that keeps track of what apps used the battery and it wiped automatically when charged to 100%.
bugadani said:
DON'T ever do this! Discharging a Li-ion battery completely WILL decrease your battery life.
Next, the battery calibration app is nothing more but a hoax. It only deletes a file containing the battery stats which is ONLY used in the battery statistics screen in settings.
So please, DON'T!
Click to expand...
Click to collapse
Well when there is fall in battery from 100% to zero in 10 min then u have to calibrate
I am not saying to calibtate it daily... as i said you have to go to zero once to complete one cycle..
spunker88 said:
The 0% reported by the operating system is actually a bit higher than the voltage at which li-ion batteries will become damaged. Any modern phone should not allow you to discharge the battery to the point where it could cause damage.
Also there was an employee from Google IIRC that said wiping battery stats was useless because its only a file that keeps track of what apps used the battery and it wiped automatically when charged to 100%.
Click to expand...
Click to collapse
True.. i m getting what u want to say about labor force..
shreyans4020 said:
Well when there is fall in battery from 100% to zero in 10 min then u have to calibrate
Click to expand...
Click to collapse
I admit, when that happens, the battery circuit is probably in a dumb state and it _may_ be useful then. But doing this regularly is incredibly dangerous for the battery. Yes, some phones bias the battery reading but the post suggests to actually force it empty while turning it back on and on and on and that really kills it.
Still, using the app is just pure nonsense.
bugadani said:
I admit, when that happens, the battery circuit is probably in a dumb state and it _may_ be useful then. But doing this regularly is incredibly dangerous for the battery. Yes, some phones bias the battery reading but the post suggests to actually force it empty while turning it back on and on and on and that really kills it.
Still, using the app is just pure nonsense.
Click to expand...
Click to collapse
No post suggest that drain battery once to zero then charge it again and again upto actual 100%
Sent from my Karbonn A5 using xda app-developers app
shreyans4020 said:
No post suggest that drain battery once to zero then charge it again and again upto actual 100%
Sent from my Karbonn A5 using xda app-developers app
Click to expand...
Click to collapse
How about the 1st point of the first post? "Drain it to 0 then turn it on and on again until it doesnt turn on anymore"?
You could brick an hp touchpad by doing this.
bugadani said:
How about the 1st point of the first post? "Drain it to 0 then turn it on and on again until it doesnt turn on anymore"?
You could brick an hp touchpad by doing this.
Click to expand...
Click to collapse
Because 0% shown by the phone is.not actually 0% to gain that actual 0% we have to do that
Sent from my Karbonn A5 using xda app-developers app
You do realize why they make the reported 0% above the actual 0%. If you drain a lithium ion battery to actual 0% you'll permanently damage it. Also calibration is only useful if you want the OS to read the battery percentage more correctly. Lithium ion batteries themselves work perfectly fine with partial charge cycles.
spunker88 said:
You do realize why they make the reported 0% above the actual 0%. If you drain a lithium ion battery to actual 0% you'll permanently damage it. Also calibration is only useful if you want the OS to read the battery percentage more correctly. Lithium ion batteries themselves work perfectly fine with partial charge cycles.
Click to expand...
Click to collapse
Actually your phone will not turn on before damage point so don't worry about that ...
Sent from my Karbonn A5 using xda app-developers app
shreyans4020 said:
Actually your phone will not turn on before damage point so don't worry about that ...
Sent from my Karbonn A5 using xda app-developers app
Click to expand...
Click to collapse
That doesn't make any sense - you're stating in that post that turning on the phone damages the battery.
I will state this again: if you force your phone on and on again until it doesn't react, you may and on the long run probably will damage your battery. If your battery is not removable, this can also easily brick your device as seen with HP Touchpads.
If you feel that you must do something, simply drain the battery _once_ then charge it. This is the only thing that a sane electric engineer will ever advise.
Well that worked on my phone... i said that do at your own risk.... actually i am saying the same thing that drain your battery.. but if battery is not calibrate sometimes phone goes off even on 36% and if u charge at that point to hundread then that method will not work...
Sent from my Karbonn A5 using xda premium
Thank us so much working perfectly for me
iiTian said:
Thank us so much working perfectly for me
Click to expand...
Click to collapse
Press the thanks button
:good:
DraXonic said:
Many of My Friends are facing Problem With Battery as Rom shows wrong information about remaining Battery %... As a result your phone goes off and when you start your Phone again it starts to show different % battery that mean that your battery is not Calibrate.. I am making this guide so that every one on this world may enjoy their phone for long time...
Warning Do at your own RISK...! Dont do it again and again
Steps you need to Do ​-1 First thing you need to do is let your battery goes to 0%.. then again start your phone(Don't plug in charger) and repeat 1st step until your phone denies to turn on back..
-2 Then Charge your phone in Switched off mode to 100%
-3 Unplug your charger
-4 On phone
-5 Your phone is going to show % of battery lesser than 100%
-6 Charge your phone again in on mode to 100%
-7 Unplug your charger
-8 Restart your phone and repeat Steps from 4 to 8 again and again until on every restart u battery % shows about 97%to100%
-9Next step is to calibrate your battery Download free app from plat Store that is Battery Calibration
-10 Calibrate your Battery with the help of that app and make sure that your Battery % is 100
-11 After Calibration Use ur Battery Upto 0%
-12 Then Charge it again and Your battery will be Calibrated...
Enjoy..
Hit Thanks ​
Click to expand...
Click to collapse
This is why you shouldn't/ need not calibrate your batteries.. It'll do you more harm than good.
http://batteryuniversity.com/learn/article/battery_calibration
are we in need to wipe battery status for once in the recovery
What about for me, me tab has been saying 1% the past 3 hours and I've been using it and trying to kill it so hard but whatever I do it won't die. I want to "truly" get it to 1% or even 0% so I can then charge it back up to 100% in hopes of calibrating the battery to show what my actual % is. Any help will be appreciated greatly.

[Q] [HELP] Charge battery issue

Hi,
i have few noob questions, hope get help.
1. is it need charge for 8hours for 1st time after purchased the mobile?
2. is it need keep the battery with full at all time / daily even not below red percentage?
3. some people said Li-ion battery have no memory so can be charge anytime any percentage (even not under red percentage). is it true?
3. whats the best solution for battery calibration? daily or monthly? or when needed?
thx for helps!!!
shiropetto said:
Hi,
i have few noob questions, hope get help.
1. is it need charge for 8hours for 1st time after purchased the mobile?
2. is it need keep the battery with full at all time / daily even not below red percentage?
3. some people said Li-ion battery have no memory so can be charge anytime any percentage (even not under red percentage). is it true?
3. whats the best solution for battery calibration? daily or monthly? or when needed?
thx for helps!!!
Click to expand...
Click to collapse
1)discharge the battery and then plug it in the charger
2)it is not necessary
3)don't do it.discharge the battery at least below 14%(it will always notify for low battery) and then charge it
4)AFAIK battery calibration is a myth
rzr86 said:
1)discharge the battery and then plug it in the charger
2)it is not necessary
3)don't do it.discharge the battery at least below 14%(it will always notify for low battery) and then charge it
4)AFAIK battery calibration is a myth
Click to expand...
Click to collapse
3. but some "expert" people said not necessary to charge it even not below 14%. can be charge anytime.
4. is it necessary or depend on user? coz what we use n charge to the battery is same like calibration? like what u said discharge till 14% below n charge it full again...
shiropetto said:
3. but some "expert" people said not necessary to charge it even not below 14%. can be charge anytime.
4. is it necessary or depend on user? coz what we use n charge to the battery is same like calibration? like what u said discharge till 14% below n charge it full again...
Click to expand...
Click to collapse
3)it will decrease battery life very soon
4)http://forum.xda-developers.com/showthread.php?t=1460553
https://plus.google.com/105051985738280261832/posts/FV3LVtdVxPT

Battery health at 92,7% after 6 weeks - is it normal?

I have a POCO F3 that I've purchased about a month and half ago. I've dialed the code *#*#6485#*#* to check my battery health by diving the current battery capacity for the factory battery capacity and then by multiplying that result by 100 and it was at 92.7%. Is it normal after about 6 weeks of use with the phone?
crazy_penguin said:
I have a POCO F3 that I've purchased about a month and half ago. I've dialed the code *#*#6485#*#* to check my battery health by diving the current battery capacity for the factory battery capacity and then by multiplying that result by 100 and it was at 92.7%. Is it normal after about 6 weeks of use with the phone?
Click to expand...
Click to collapse
Check what cpuz reports. To me that doesn't look normal, something is with the battery sensors. Have you installed any custom kernel or anything that might play with "Advanced Charge Control Interface" ?
LAST_krypton said:
Check what cpuz reports. To me that doesn't look normal, something is with the battery sensors. Have you installed any custom kernel or anything that might play with "Advanced Charge Control Interface" ?
Click to expand...
Click to collapse
What is cpuz? I haven't installed anything
LAST_krypton said:
Check what cpuz reports. To me that doesn't look normal, something is with the battery sensors. Have you installed any custom kernel or anything that might play with "Advanced Charge Control Interface" ?
Click to expand...
Click to collapse
Oh ok. It's an app. I've installed and this is what appears about my battery's info
@crazy_penguin
IMO you can't compute Battery health at your own - at least not the way you did it. And Android OS also can't.
Battery health - also called battery lifespan - simply tells you amount of time your battery can last until it needs to be replaced / fully recharged.
Battery health always is expressed as estimated time - in hours and minutes, not as percent of whatever.
More info here:
Battery Life Calculator: How Long Does A Battery Last? (Ah, V, Hours)
In our article discussing Ah (ampere-hours) and Wh (watt-hours), we got a ton of questions about the longevity of batteries. The question “How long does a battery last?” was a predominant one. To help everybody trying to calculate how long will a battery last, we have created a Battery Life...
learnmetrics.com
crazy_penguin said:
I have a POCO F3 that I've purchased about a month and half ago. I've dialed the code *#*#6485#*#* to check my battery health by diving the current battery capacity for the factory battery capacity and then by multiplying that result by 100 and it was at 92.7%. Is it normal after about 6 weeks of use with the phone?
Click to expand...
Click to collapse
It's not normal, in that period, it shouldn't decrease a full 2%. Sometimes, a malfunctioning OS may report false calculations.
On my old device, I used two different systems, they showed different calculations of battery health.
One OS showed ~68-67%, the other showed 76.4%. I don't trust calculations anyway.
Mohamedkam000 said:
It's not normal, in that period, it shouldn't decrease a full 2%. Sometimes, a malfunctioning OS may report false calculations.
On my old device, I used two different systems, they showed different calculations of battery health.
One OS showed ~68-67%, the other showed 76.4%. I don't trust calculations anyway.
Click to expand...
Click to collapse
Wipe cahce partiton or even do a factroy reset. If you have TWRP check what battery % it shows there.
jwoegerbauer said:
IMO you can't compute Battery health at your own. And Android OS also can't.
Battery health - also called battery lifespan - simply tells you amount of time your battery can last until it needs to be replaced.
Click to expand...
Click to collapse
Meh, stop worrying.
An Li useful life is about 200 full charge cycles (0-100%).
Partial midrange charging cycles (40-62%) can yield hundreds even thousands more full charge cycles to the battery's lifespan.
Estimate battery health by SOT and by drain reported overnight.
When your SOT dips much below 80% of it's new capacity, the Li is degraded and at the end of its usable lifespan.
Replace before it fails and damages the phone.
Any battery swelling in a failure.
Cell phone Li's hate high cell voltage, temperatures and high discharge rates.
Keep charge cycles between 40-72% to extend life.
Li's love frequent midrange power cycling.
Avoid discharging below 20% or constantly charging to 100%.
Minimum start charge temp is 72F, 82-92F is best. Low temp charging can cause Li plating.
Never attempt to charge a Li below 40F!!!
If battery temp is exceeding 100F use cooling.
Apps like Accubattery's history logging are useful is seeing actual battery discharge and charging times. Useful is spotting excessive battery drain.
Eventually the battery will need replacement. On a heavily used phone that's 1-2 years.
No big deal... just do it!
Always use a new OEM seal if the phone is watertight.
LAST_krypton said:
Wipe cahce partiton or even do a factroy reset. If you have TWRP check what battery % it shows there.
Click to expand...
Click to collapse
Oh don't worry, I never considered this a problem, phone was just fine in everything except at the health calculation.
I'm just showing the OP that maybe it has something to do with the OS.
LAST_krypton said:
Wipe cahce partiton or even do a factroy reset. If you have TWRP check what battery % it shows there.
Click to expand...
Click to collapse
how do I wipe cache?
Try discharging until it dies then charge to 100%
Repeat 2 more times to recalibrate the battery % indicator.
Not worth the trouble though...
blackhawk said:
Try discharging until it dies then charge to 100%
Repeat 2 more times to recalibrate the battery % indicator.
Not worth the trouble though...
Click to expand...
Click to collapse
so it's not worth doing it? I shouldn't worry about those 93%?
crazy_penguin said:
so it's not worth doing it? I shouldn't worry about those 93%?
Click to expand...
Click to collapse
As long it shutdown at 5% and charges to 100% there's nothing that should to be done.
A sudden capacity drop, erratic fast charging indicate a battery failure.
A swollen battery is a failure.
You have none of these symptoms.
it's fine, I agree
I don't think it's typical, what you use it for is dependent? Maybe if intensive video processing and tweaking, playing and watching live?
May Anyone ask how something functions, too? What could I get to learn about the quality and capability of your real battery?

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