Database Develop

[Q] battery percentage not accurate

Hi Guys!!
i've done what this link told
http://forum.xda-developers.com/showpost.php?p=10092321&postcount=11053
but everytime i reach 100% and unplug the charger, my battery percentage immediately shows 97%, be it charging with the phone off or on....
i already did wipe my battery stats in recovery a few times, the first time only it showed that the stats were wiped, after that every time i wipe the stats, it immediately goes back to the previous menu, without stating whether the wipe was carried out or not....
can someone help this noob out here.... thnx

FYI, i just installed darky's rom v8.0 with Voodoo's kernel 5.2(lagfix disabled)
when i was on stock, my 100% could last me about nearly half an hour

I have this problem too. (I am on Darky 9.02 and have seen it in Darky 8.0 too). BUT if your battery life is satisfactory then don't worry about it.

hows the performance on v9.02 bro?

mab71 said:
hows the performance on v9.02 bro?
Click to expand...
Click to collapse
Here is another post on calibration (from Darky himself)
http://darky.ficeto.com/community/index.php?threads/guide-how-to-calibrate-your-battery.321/

mab71 said:
hows the performance on v9.02 bro?
Click to expand...
Click to collapse
9.02 is good but then so was 8.00. I personally think 8.00 was faster but its only been a few days and am still experimenting. I may remove the lag fix and still need to see if my battery is draining faster.

Also look at this post: Has some interesting but unverified info about the drop from 100% to 97/98% after unplugging
http://darky.ficeto.com/community/i...-how-to-calibrate-your-battery.321/#post-3839

Do you really want it on 100%? Easy, once it says charged, leave it on the charger for another hour and when you unplugged it should stay 100 for a while
Sent from my GT-I9000 using XDA App

Problem posted hundreds of times along with solutions like search the Rom makers forum and read the posts re this problem for starters .
Simple solution save time and effort is to ignore it .
jje

thanx all for the advices.... tried the QueenAmy method, result is:
heavily used phone: battery 'died' at 2%(???)
charged phone until 100%(phone off)
switched phone on while still charging: 97% (didnt have to unplug charger)
waited...then it went from 97% straight to 100%.(funny)
then went into recovery to wipe bat stats.
rebooted and unplugged charger, battery still at 97%....
now trying to charge a bit more longer to see if can change anything... (fingers crossed)

icejagans said:
Do you really want it on 100%? Easy, once it says charged, leave it on the charger for another hour and when you unplugged it should stay 100 for a while
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
not working bro...
left it on for about an hour, unplugged, straightaway the percentage drops to 98...

It's just a change in 2.2.1.
In 2.1/2.2, they 'stretched' out the battery life a bit to mark it up to 100%, in 2.2.1 they decided to just show it at the actual value. The reason your battery won't charge to 100% is to prolong the battery life, because if the charger always charged to 100% it would have a high chance of overcharging and damaging your battery over time.
There's no real change in battery life.

I reverted back to 2.2 and still have the problem. Maybe i shouldve flashed on 100% battery... Is it possible to solve if i do another fresh flash with 100% battery?
Sent from my GT-I9000 using XDA App

nwsk said:
It's just a change in 2.2.1.
In 2.1/2.2, they 'stretched' out the battery life a bit to mark it up to 100%, in 2.2.1 they decided to just show it at the actual value. The reason your battery won't charge to 100% is to prolong the battery life, because if the charger always charged to 100% it would have a high chance of overcharging and damaging your battery over time.
There's no real change in battery life.
Click to expand...
Click to collapse
Just to clarify this, you actually cant over charge the battery on the SGS nor Li-Ion for that matter, what happens here is that the battery goes on trickle charge pre 2.2.1 and battery degrades faster if its kept at 100%, 40% is optimal for storage now with the recent changes the phone will pretend it has charged upto 100% but will stop anywhere from 99~97% yes there is no loss in battery life but dont consider 97% as the new 100%, theres already a 3% loss in this to begin with.

EarlZ said:
Just to clarify this, you actually cant over charge the battery on the SGS nor Li-Ion for that matter, what happens here is that the battery goes on trickle charge pre 2.2.1 and battery degrades faster if its kept at 100%, 40% is optimal for storage now with the recent changes the phone will pretend it has charged upto 100% but will stop anywhere from 99~97% yes there is no loss in battery life but dont consider 97% as the new 100%, theres already a 3% loss in this to begin with.
Click to expand...
Click to collapse
thanks Earl.... but is there a solution for my prob here, or do i just have to ignore it?

thanks Earl.... but is there a solution for my prob here, or do i just have to ignore it?
Is not a problem its the current design .
all the other millions of posts on the subject no way found to increase the figure .
jje

thnx mate.... i guess i'll just have to chill about this....n stop wasting my time right... ;-)

[Q]Battery indicator showing wrong?

The last couple of days I've got a weird problem. When my battery is fully charged everything seems okay and it drains in normal speed (compared to stock).
But when my phone runs out off battery and i start to charge in the beginning everything seems fine.
But suddenly it can go from 75 to 100% in 1 minute.When i look at the stats in MIUI ROM it seems like it's not at same height as it was the last day of 100%. Maybe only 80%.
Sorry for my bad English, but i hope it makes sense.
I've wiped battery stats in CWM. But is it possible that the phone actually is only 80% charged, even though the indicator shows 100% after wipe?
Because if the ROM think the battery is charged and wipe stats it will afterwards only charge to that point and the battery maximum will decrease over days?
If that's possible, how do i full charge the battery? Just leave it in the charger or?
I hope you can understand what I mean.
Thanks in advance

Hello
Does your phone charge to fx 75% and after that doesnt get higher until after you restart the phone?
Sent from my LG-P990 using XDA App

CescMusta said:
Hello
Does your phone charge to fx 75% and after that doesnt get higher until after you restart the phone?
Sent from my LG-P990 using XDA App
Click to expand...
Click to collapse
Yes excactly. But the numbers differs.
Today it charged to 100% though.
Got the same problem?
Sent from my Optimus 2X using XDA App

have you try calibrate your batt again
yes my friend have this problem too, maybe there is software bug

After flashing Celebration HD 2.0.1b I first used Battery Calibration from market to wipe battery stats. Afterwards the battery indicator problems started.
Yesterday i decided to wipe battery stats manually in CWM and drain to phone to 2% before charging, and afterwards I was able to fully charge the phone.
So maybe the bug in is Battery Calibration app?
I decided to install Juice Plotter to monitor the battery and compare it to one build in in MIUI. Just to get some more data.

Hello again
Yes i had the same problem as you, with my previosly 2 lg optimus 2x, and returned them because of the problem you mentioned. I am on the third op2x and luckily this work good
So if i were in your position i would try to go to the dealer and shift the phone with another lg optimus 2x.
Best regards
Sent from my LG-P990 using XDA App

CescMusta said:
So if i were in your position i would try to go to the dealer and shift the phone with another lg optimus 2x.
Click to expand...
Click to collapse
The user said that he started to have problem after a new rom and wiping battery stats, changing phone for that is not the smartest move at all. Is like changing phone because your rom doesn't work.
I have a similar problem, after you wipe battery stats you don't have a reliable indicator, for me the phone took 3 hours to get from 99 to 100%.
I also noticed that my miui ( 1.8.5 same for 1.7.29) doesn't update battery stats when the screen is off so all those plotter don't work, and i think this messes up with the battery indicator (I guess the phone doesn't have enough data to make a decent estimate)
I think is miui + wipe battery stats that can be problematic

I know that but i am just saying that i also had the same problem with the stock rom.
Best regards
Sent from my LG-P990 using XDA App

How old is the battery? How many cycles does it have?
I know from laptop Li-Ion batteries that the voltage vs. capacity is not linear.
When discharging, the voltage will steadily drop to a "wear-level" where it will jump to an almost depleted level. When charging, this "wear-level" will be at the top.
Why I am telling this? Because if this mapping is kept in SW and you wiped it, Android needs to relearn it again. So at 1st complete charging/discharging you would see a % sudden drop/raise, but at the next cycles it would be linear with time (although the total time will be smaller than a new battery).
When laptop/phone battery tips talk about calibration, it is so whoever monitors the voltage (circuit in battery or SW) to know were the wear drop will be, so your estimates to be better.
As an example, I had a very old Thinkpad that did not have any calibration, and it would discharge to about 40% and drop to 5% within seconds. But when charging, it would raise steadily to 70% (from that 5%) but 70% to 95% in seconds. After years of use, that percentage gap would just increase (40-5 got 60-5, 70-5 on discharging).
PS: my current Thinkpad has 4 years and the battery capacity is 49% with 150 cycles. But this one has a nice feature where if the battery was above a certain percentage, plugging AC would not charge it (and thus save a few cycles). I used it set at 70%.
PS: LiIon batteries have cycle count, heat and time as main enemies. Also don't like prolonged (think storage) low charge.

battery on wallcharger screen of error
CenaDK said:
The last couple of days I've got a weird problem. When my battery is fully charged everything seems okay and it drains in normal speed (compared to stock).
But when my phone runs out off battery and i start to charge in the beginning everything seems fine.
But suddenly it can go from 75 to 100% in 1 minute.When i look at the stats in MIUI ROM it seems like it's not at same height as it was the last day of 100%. Maybe only 80%.
Sorry for my bad English, but i hope it makes sense.
I've wiped battery stats in CWM. But is it possible that the phone actually is only 80% charged, even though the indicator shows 100% after wipe?
Because if the ROM think the battery is charged and wipe stats it will afterwards only charge to that point and the battery maximum will decrease over days?
If that's possible, how do i full charge the battery? Just leave it in the charger or?
I hope you can understand what I mean.
Thanks in advance
Click to expand...
Click to collapse
I have when i turn off my fhone and i charge it it shows a battery icon whit an error in it ics lgp990 please help i dont no what tho do

[Q] battery never reaches 100% when phone is off

Hi,
I am trying to do the battery calibration piece but my phone never reaches 100% when the phone is off i charged it for almost 3-4 Hrs.
can some one help me?

New battery, like $10

i have two batteries now still i see the same issue, it started once i moved to GB Roms, before it was pretty good.

It is normal between 96% and 99%.

Is it normal to not reach 100% when i turn the phone off and charge it?

kethireddy said:
Is it normal to not reach 100% when i turn the phone off and charge it?
Click to expand...
Click to collapse
There has been talk about this occurrence before, but basically it's a battery-life saving feature of Gingerbread. Rather than hold your battery at 100%, which will decrease the battery's life, it charges to 100%, lets it dip down to a certain threshold (like 90%, for example), then recharges again.
That's my understanding, anyway.

jmtheiss said:
There has been talk about this occurrence before, but basically it's a battery-life saving feature of Gingerbread. Rather than hold your battery at 100%, which will decrease the battery's life, it charges to 100%, lets it dip down to a certain threshold (like 90%, for example), then recharges again.
That's my understanding, anyway.
Click to expand...
Click to collapse
kethireddy said:
Is it normal to not reach 100% when i turn the phone off and charge it?
Click to expand...
Click to collapse
Like jmtheiss said t's a GB surge protection not to overcharge the battery. It's a feature not a bug

does this mean we can do battery calibration on GB roms?

kethireddy said:
does this mean we can do battery calibration on GB roms?
Click to expand...
Click to collapse
Yahh, that never changed.....
Sent from my SGH-I897 using xda premium

Two things regarding Battery Calibration :
1. For Better Battery Life : Always charge upto about 90% and use. Recharge when you reach 10% or even less. This will tremendously increase the life span of Li-Ion battery.
2. As regard to 100% charging :
(i) Boot to CWM, wipe battery stats.
(ii) Reboot and charge until 100%, Disconnect from charger
(ii) Power Off and connect charger again. Charge until 100%
(iii) Boot to CWM, wipe battery stats again.
(iv) Power on the phone and charge until 100%
Done.
Repeat the same, if you wish to re-calibrate the battery after some time.
Tip: Always re-calibrate battery and charge to 100% before flashing any ROM.

ROMMaker said:
Two things regarding Battery Calibration :
1. For Better Battery Life : Always charge upto about 90% and use. Recharge when you reach 10% or even less. This will tremendously increase the life span of Li-Ion battery.
2. As regard to 100% charging :
(i) Boot to CWM, wipe battery stats.
(ii) Reboot and charge until 100%, Disconnect from charger
(ii) Power Off and connect charger again. Charge until 100%
(iii) Boot to CWM, wipe battery stats again.
(iv) Power on the phone and charge until 100%
Done.
Repeat the same, if you wish to re-calibrate the battery after some time.
Tip: Always re-calibrate battery and charge to 100% before flashing any ROM.
Click to expand...
Click to collapse
i am trying to follow these steps but my phone never reaches 100% @ the third step i have been charging it for 3 hrs..

Which ROM are you using? Because I know some ROMS have specific issue with battery charging. Please let me know

ROMMaker said:
Which ROM are you using? Because I know some ROMS have specific issue with battery charging. Please let me know
Click to expand...
Click to collapse
I was using MUI GB rom

kethireddy said:
I was using MUI GB rom
Click to expand...
Click to collapse
As I fiddled around with most of the ROMs out here in XDA, would suggest you to flash a KK4 build like Serenity or Illiminance, if you want a stable GB ROM. KK4 is the latest captivate GB leak and the ROM is awesome. Also, the ad-hoc wi-fi through modifided wpa_supplicant works in this build. The ROM is fast, stable and got good battery life. Try to flash the ROM and I'm sure you will get a great GB ROM without troubles.
Hit thanks, If I helped you out

Try charging with screen on. You'll hit100.

mrhaley30705 said:
Try charging with screen on. You'll hit100.
Click to expand...
Click to collapse
with screen on i am able to hit 100 but to calibrate arn't we supposed to get it with phone turned off.

battery calibration is useless

it was revealed by "Dianne Hackborn" from google android team a while ago. i'm posting it here because some of p970 users still doing this calibration thing.
here is the post:
"The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory."
No, it does not.
This file is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings.
That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your more device more fantastic and wonderful... well, unless you have some deep hatred for seeing anything shown in the battery usage UI. And anyway, it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point), so this would be a much easier way to make it go away.
Click to expand...
Click to collapse

murrun said:
it was revealed by "Dianne Hackborn" from google android team a while ago. i'm posting it here because some of p970 users still doing this calibration thing.
here is the post:
Click to expand...
Click to collapse
lol you got it all wrong. he says that the battery indicator has nothing to do with tje battery stats app and then explains whar battery stats app does. this has nothing to do with calibration and if you still think calibration is useless then do a simple check. after a period of not calibrating your battery and using your phone heavily (2-3 hours of gaming for example), or even better after using your phone extensively while charging, let it go to full 100%. At that point when the phone thinks that it is full it stops charging cause the integrated safety tells it that it is full. turn off the phone remove battery for a couple of minutes and then insert it and plug it on charger. you will notice that it is charging again. turn it on withou unplugging and see the battery level. can be as low as 80ish %. which means that if you hadnt done that all that juice would not charge and be left unused. try it...

jimakos29 said:
lol you got it all wrong.
Click to expand...
Click to collapse
Well, no, actually you did. What she said was that deleting the batterystats.bin does nothing more that resetting the battery usage tracking. She also said what's in the file and it sure looks like it could not even be used for anything else. You could check the code to see. Otherwise, just trust her.

1aca said:
Well, no, actually you did. What she said was that deleting the batterystats.bin does nothing more that resetting the battery usage tracking. She also said what's in the file and it sure looks like it could not even be used for anything else. You could check the code to see. Otherwise, just trust her.
Click to expand...
Click to collapse
yeah but calibration is not about battery stats. is about geting your phone to understand that it is not fully charged yet even though it thinks it is. try what I suggested and you will see. the apps for calibration do nothing as they say when it is fulmy charged leave it for some more till the program tells you it is ok. actually when phone perceives itself as charged it stops charging so those programs do nothing. It is all about forcing it to fully charge once in a while (I do it once a month) by removing battery once it says it is charged and reinserting after a few minutes and recharge it and then repeating until the time that i plug it and it wont charge anymore. wiping battery stats is NOT calibrating never was or never considered calibrating. and the thread was about how calibration doesn't work (which does) not about how battery stats wiping doesn't work (which it doesnt)... so if op doesn't distingush between calibration and battery wiping and refera to the latter as the former then it is not my fault. To sum up,what the op said was that we shouldnt do calibrations because wiping battery stats doesn't work and what I said was that battery stats has nothing to do with calibration.

i'm not android veteran. but when i came across "batery calibration" term, it means "removing batterystats" at this community. so, i gues my point isn't that wrong.

murrun said:
i'm not android veteran. but when i came across "batery calibration" term, it means "removing batterystats" at this community. so, i gues my point isn't that wrong.
Click to expand...
Click to collapse
well unfortunately it is not. by all means try what i said and you will see that although your battery appears charged it will charge some more and again and again before it stops charging and is really full. if i doesnt then it is calibrated if not it getsvcalibrated when after inserting it, it wont charge anymore. then after some time again (maybe a month maybe less) you will see it happening again. trust me batteries is what I make a living from.

I don't see how calibrating could hurt so if you think it helps do it. If you don't, then leave it. I did it after flashing and no ill effects.

jimakos29 said:
yeah but calibration is not about battery stats. is about geting your phone to understand that it is not fully charged yet even though it thinks it is. try what I suggested and you will see. the apps for calibration do nothing as they say when it is fulmy charged leave it for some more till the program tells you it is ok. actually when phone perceives itself as charged it stops charging so those programs do nothing. It is all about forcing it to fully charge once in a while (I do it once a month) by removing battery once it says it is charged and reinserting after a few minutes and recharge it and then repeating until the time that i plug it and it wont charge anymore. wiping battery stats is NOT calibrating never was or never considered calibrating.
Click to expand...
Click to collapse
That's just plain wrong. Shall I link to a few respected "battery calibration" tutorials that revolve around deleting the batterystats.bin? Heck, there's even an option for it in CWM Recovery.
jimakos29 said:
and the thread was about how calibration doesn't work (which does) not about how battery stats wiping doesn't work (which it doesnt)... so if op doesn't distingush between calibration and battery wiping and refera to the latter as the former then it is not my fault. To sum up,what the op said was that we shouldnt do calibrations because wiping battery stats doesn't work and what I said was that battery stats has nothing to do with calibration.
Click to expand...
Click to collapse
So what do you think happens when you remove the battery from your phone for a few minutes then put it back?

Battery Stats myth
1aca said:
That's just plain wrong. Shall I link to a few respected "battery calibration" tutorials that revolve around deleting the batterystats.bin? Heck, there's even an option for it in CWM Recovery.
Click to expand...
Click to collapse
I have done and still doing a lot of reading in this regard. The battery stats can only be held responsible for calibration if it holds amperage and voltage values set for the phone stock battery. That myth is currently considered debunked as this file is considered only to be linked for UI purposes. It all comes down to how actually does the phone measure the battery level. If there were in-built values for voltages and current, the concept of plug and play extended batteries would be doomed and they would have been accompanied by a detailed calibration process. Then there is also the discussion of Max 17042 (I am a SGS2 user), the fuel gauge chip and how it works. Frankly, I think we first need to understand how the phone measures the battery and against which parameters, are they preset or change on the go and what are the limits.
1aca said:
So what do you think happens when you remove the battery from your phone for a few minutes then put it back?
Click to expand...
Click to collapse
I was trying this method just now and what happened was after i got the 100% signal, i unplugged the battery and after giving it a rest of few minutes, plugged it back in (a new 2000 mAH extended battery by Samsung). When i l plugged in the charger again, it start charging back showing that there was either power leakage or that is what calibration is all about. Did that two three times and when finally switched the phone on, it was 100%.

samurai jacko said:
I was trying this method just now and what happened was after i got the 100% signal, i unplugged the battery and after giving it a rest of few minutes, plugged it back in (a new 2000 mAH extended battery by Samsung). When i l plugged in the charger again, it start charging back showing that there was either power leakage or that is what calibration is all about.
Click to expand...
Click to collapse
You are doing what is needed to reach real 100%, a second charge cycle, see article.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries/
As stated there it will reduce battery life but increase runtime after charge...
There's nothing good without evil ;-)

murrun said:
it was revealed by "Dianne Hackborn" from google android team a while ago. i'm posting it here because some of p970 users still doing this calibration thing.
Click to expand...
Click to collapse
if you got clockworkmod recovery charge your phone to 100% (8-12 hours charge should do) then go to your recovery then select advanced then there should be option for wiping battery. Hopefully it'll work!!!

[Q] Weird Issue, phone auto shutdown when the battery is like 5% on Lollipop ?

My XT1092, recently got updated to Lollipop i.e. Android 5.0
Two of my battery runs, starting from 100% full charge came down to like 5% and the phone shut down automatically as if it was 0%
Also on a side note, i did not put any mode on the battery saver mode for those two runs.
Now to test it, i kept my battery saver to start at 5% but i am not sure if it will run at 5% or just shut down
Anyone got an idea/solution for this issue ??
P.S. Even Motorola care chat, does not have an answer, all they said is to keep my phone in safe mode for a day and check it out....

Mine just did this the other day. When I pressed the power button it showed the battery with a little red fill and a huge yellow triangle with an exclamation mark in it. Also happened last night.

I have also had the same issue xt1092 and on lollipop.

well...
yea man, so the thing is motorola support said that, keep ur phone in safe mode for a day and recheck the issue...
so idk... :/
i am checking my battery use and for now i have kept my battery saver on 5% so i hope it starts on battery saver itself.. rather than shutting down...

My XT1095 does the same thing. Really annoying! Its really lying to you about how much battery is left if its going to do that. I just know that if i'm going below 10% i better run to find a charger ASAP!

M3drvr said:
My XT1095 does the same thing. Really annoying! Its really lying to you about how much battery is left if its going to do that. I just know that if i'm going below 10% i better run to find a charger ASAP!
Click to expand...
Click to collapse
it is quite misleading to say the least..
i did not have this issue with KitKat though..
might be a lollipop thing only

I'll join this list. Really annoying, and never happened on 4.4.4

I've never let my battery get that low honestly, but...
Keep in mind that your battery percentage is completely an estimate. Battery capacity is measured in mAh, but there's no way to measure the current charge capacity in mAh of a battery. The only way to do so would be to run all of the power out of the battery and record the power over time, but then you'd have a dead battery. As a result, the system estimates your remaining battery capacity as a percentage based on the current voltage of the battery. But that can be different depending upon how quickly you've drained the battery and other factors.

So, Android has methods built-in which automatically calibrate the battery, but they only work properly if you fully charge and discharge your device on a regular basis. A battery starts off weak, then it gains strength after a few charging cycles, finally over time it peaks and then begins to taper off as far as battery life goes.
You've likely not taken your device to 0% for a while. The android solution is to fully discharge and recharge your battery a few times to allow it to recalibrate. Slow charging is the best for recalibration. Plug it into a computer for 500mAh charging rather than using a charger. Chargers can charge quicker(1.5A) but do not allow the device to calibrate as well due to the high amperage.
So, just use your device and let it drain fully, and charge fully on a computer USB port and it should recalibrate itself.

InspectifierWrectifier said:
So, Android has methods built-in which automatically calibrate the battery, but they only work properly if you fully charge and discharge your device on a regular basis. A battery starts off weak, then it gains strength after a few charging cycles, finally over time it peaks and then begins to taper off as far as battery life goes.
You've likely not taken your device to 0% for a while. The android solution is to fully discharge and recharge your battery a few times to allow it to recalibrate. Slow charging is the best for recalibration. Plug it into a computer for 500mAh charging rather than using a charger. Chargers can charge quicker(1.5A) but do not allow the device to calibrate as well due to the high amperage.
So, just use your device and let it drain fully, and charge fully on a computer USB port and it should recalibrate itself.
Click to expand...
Click to collapse
While it does help the calibration, it's very bad for your battery to do this deep discharge multiple times.

raptir said:
I've never let my battery get that low honestly, but...
Keep in mind that your battery percentage is completely an estimate. Battery capacity is measured in mAh, but there's no way to measure the current charge capacity in mAh of a battery. The only way to do so would be to run all of the power out of the battery and record the power over time, but then you'd have a dead battery. As a result, the system estimates your remaining battery capacity as a percentage based on the current voltage of the battery. But that can be different depending upon how quickly you've drained the battery and other factors.
Click to expand...
Click to collapse
Sometimes you don't have a choice about letting battery drain get that far.
But regardless, its most definitely an issue with lollipop. Uncountable android devices, and this is the first time I've ever experienced this issue. Happens religiously at 5%. So its never happened before on any device I've used, including this moto x pure on KitKat, and it always happens at 5%.
If it were a true calibration issue, one would think it'd happen at different percentages. However I'm certain this is a bug.

qwerty12601 said:
Sometimes you don't have a choice about letting battery drain get that far.
But regardless, its most definitely an issue with lollipop. Uncountable android devices, and this is the first time I've ever experienced this issue. Happens religiously at 5%. So its never happened before on any device I've used, including this moto x pure on KitKat, and it always happens at 5%.
If it were a true calibration issue, one would think it'd happen at different percentages. However I'm certain this is a bug.
Click to expand...
Click to collapse
I understand that you don't always have a choice, I just meant that I have no insight as to the possible bug since I've never experienced it. And to clarify, it's not really a "calibration" issue, it's a matter of there is no way to accurately measure the charge of the battery.
Honestly, Google could have even implemented this intentionally in order to prevent damage to the battery from a deep discharge.

raptir said:
I understand that you don't always have a choice, I just meant that I have no insight as to the possible bug since I've never experienced it. And to clarify, it's not really a "calibration" issue, it's a matter of there is no way to accurately measure the charge of the battery.
Honestly, Google could have even implemented this intentionally in order to prevent damage to the battery from a deep discharge.
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But android has been completely accurate in the past. Right down to 1 single percent.
And there's no way google implemented this as a safety feature. If they were legitimately trying to do this, they'd just have the battery monitor read less than actual capacity as to not confuse the operator.
As well as they have what they believed to be a big feature, "battery saver" which has the option to activate at 5%. So them killing your phone at 5% intentionally doesn't hold water.

qwerty12601 said:
But android has been completely accurate in the past. Right down to 1 single percent.
And there's no way google implemented this as a safety feature. If they were legitimately trying to do this, they'd just have the battery monitor read less than actual capacity as to not confuse the operator.
As well as they have what they believed to be a big feature, "battery saver" which has the option to activate at 5%. So them killing your phone at 5% intentionally doesn't hold water.
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No it hasn't. It may not have shut down until after it read 1%, but it has not been accurate because there is no accurate way to measure the current charge of a battery.
http://batteryuniversity.com/learn/article/how_to_measure_state_of_charge
The fact that it consistently shuts down at 5% does seem like a bug, but it's a very odd bug since it seems like there would have to be some code to specifically tell the phone to shut down.

raptir said:
No it hasn't. It may not have shut down until after it read 1%, but it has not been accurate because there is no accurate way to measure the current charge of a battery.
http://batteryuniversity.com/learn/article/how_to_measure_state_of_charge
The fact that it consistently shuts down at 5% does seem like a bug, but it's a very odd bug since it seems like there would have to be some code to specifically tell the phone to shut down.
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Every android device I've owned, probably 12, including the 3 still in service with me (moto x before lollipop, nexus 7, nexus 4) all have accurate battery meters right down to 1%. Now are they adjusting on the fly and lowering/raising battery percent to accurately match calculations? Probably. But it adjusts to where the battery meter will read down to the very last percent. No surprises.
The whole point of this thread us that some moto x pures are shutting down at 5%. Maybe the battery really is at 0%, maybe its at 5 or 10%, but its a "bug" that the phone is shutting off at 5%. Its rather a flaw in on the fly calculations where its not accurately adjusting at lower percentages, or a software flaw. But it's a bug either way. That's the complaint here.

raptir said:
Honestly, Google could have even implemented this intentionally in order to prevent damage to the battery from a deep discharge.
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That is was Microsoft did with their Surface tablets, you can change it, I have mine set to power off at 10%

raptir said:
While it does help the calibration, it's very bad for your battery to do this deep discharge multiple times.
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Wrong. this is the recommended way to use every mobile phone battery. A full charge and discharge is called a cycle, and cycles are how battery lives are rated.

InspectifierWrectifier said:
Wrong. this is the recommended way to use every mobile phone battery. A full charge and discharge is called a cycle, and cycles are how battery lives are rated.
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Please don't just post "wrong" without anything to back it up.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Table 2 provides details as to why what I said is correct. A 50% discharge will not degrade to 70% capacity for 3-4x as many cycles as a 100% discharge. That amounts to up to double the useful life of the battery assuming your usage stays the same.

InspectifierWrectifier said:
Wrong. this is the recommended way to use every mobile phone battery. A full charge and discharge is called a cycle, and cycles are how battery lives are rated.
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Have fun killing your battery very quickly by fully discharging all the time

raptir said:
Please don't just post "wrong" without anything to back it up.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Table 2 provides details as to why what I said is correct. A 50% discharge will not degrade to 70% capacity for 3-4x as many cycles as a 100% discharge. That amounts to up to double the useful life of the battery assuming your usage stays the same.
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Mobile device batteries are designed to be "fully" depleted. They are software controlled. You will never discharge a properly controlled battery 100%. This is why your device still has power to turn on and tell you that the battery is too low to turn on.
There are always exceptions to the rule. However, mainstream devices will almost always keep the battery at a safe level.
You cannot use a single chart on all lithium ion batteries. In fact, every one is different due to chemical and annode/cathode changes. This is why every battery has its own MDS for shipping purposes.
The small changes to batteries cause them to react differently to different usage patterns. When designing a battery these reaction patterns are supposed to be accounted for in the battery calibration.
A key engineering principal: a device should never be capable of destroying itself. Full discharge is normal operation for most devices.