Every time when I plug my A500 for recharging, after the power button turned to white (or a kind of light blue...) indicating the device is fully charged, when I take a look at the battery stat, it shows "99%".
So, I noticed I only got "100%" when I boot the device while charging...
Is that common? The boot time drains 1% of battery till start the system???
It's really just an estimate of charge and you can't really take the number at face value.
I don't recall if the stock battery information shows you the actual voltage RIGHT NOW, but that's a more relevant number than the percentage shown.
An example is on my phone where it will show a fully charged battery to be at 4.210V which usually corresponds to 100%. When it says 4.210V, I know it's completely topped off regardless of what the percentage says. So there's some correlation between the voltage and what it regards that as a percentage of possible charge.
So it's not really using 1% at boot up. That's just a margin of error you can ignore.
qhorque said:
It's really just an estimate of charge and you can't really take the number at face value.
I don't recall if the stock battery information shows you the actual voltage RIGHT NOW, but that's a more relevant number than the percentage shown.
An example is on my phone where it will show a fully charged battery to be at 4.210V which usually corresponds to 100%. When it says 4.210V, I know it's completely topped off regardless of what the percentage says. So there's some correlation between the voltage and what it regards that as a percentage of possible charge.
So it's not really using 1% at boot up. That's just a margin of error you can ignore.
Click to expand...
Click to collapse
Well... Ok, as long as it`s not an issue...
Sometimes mine says 100% at full charge, sometimes it says %99.
I wouldn't sweat it.
alexrb said:
Well... Ok, as long as it`s not an issue...
Click to expand...
Click to collapse
If you charged it for 6 hours and it said 60%, you'd have a real issue. But 1% is really within the realm of tolerance, margin of error, etc. Definitely ignore it.
So, I am using MIUI 2.1.12 with LorDModUE 8.6 CFS 2WCR kernel.
I have installed 4EXT Recovery Controller and CurrentWidget.
With CurrentWidget, I monitored the battery while charging until it reached 0mA (which means the battery is as full as it can get).
With 4EXT Recovery Controller I removed the batterystats.bin file.
I drained the phone until it shut itself down. Then I charged it (without powering it on) until it was full (LED was green).
I power on the phone... 99% battery.
I plug in the charger... it says 26mA (which means it would reach 0mA as in full charge in another 20-30 minutes).
WHAT THE HELL?!
This never happened while I was using the default CM kernel included in MIUI. Only happened with Tiamat and LordMod.
--
Seriously, guys, what is the best way to calibrate the battery?! Perhaps I should not have let it shut itself down, but plug the charger when the phone was at 1% (which lasted for another 20-30 minutes, by the way)?!
if I don't remember it wrong the LED turns green at 90%.
afair the battery doesn't get charged during booting. which means that you probably lost the 1% during boot.
I also used the same method and got it calibrated correctly
but is their any other way too ?
monki79 said:
if I don't remember it wrong the LED turns green at 90%.
Click to expand...
Click to collapse
The LED turns green on AOSP ROMs at 90%, when the phone is ON, as far as I know. When it is OFF, it works fine (goes green at 100%).
I want to hear from the developers / those that know how these codes work and stuff... Cause I don't want to look at my phone how the percentage goes down so fast, then, when it reaches 10%, I can play Pocket Legends for another 20 full minutes -.-
Formhault said:
With CurrentWidget, I monitored the battery while charging until it reached 0mA (which means the battery is as full as it can get).
With 4EXT Recovery Controller I removed the batterystats.bin file.
I drained the phone until it shut itself down. Then I charged it (without powering it on) until it was full (LED was green).
I power on the phone... 99% battery.
I plug in the charger... it says 26mA (which means it would reach 0mA as in full charge in another 20-30 minutes).
WHAT THE HELL?!
Click to expand...
Click to collapse
The battery doesn't charge to full capacity first time around. When I used to calibrate the battery I would charge until it was drawing 0mA, then reboot; it would be drawing about 26mA, so I'd charge to 0mA again and reboot; it would now be drawing about 15mA, so I'd carry on charging to 0mA, reboot, repeat, repeat and repeat until it eventually continued to draw 0mA after a reboot. Then I'd delete the batterystats.bin file.
As one of Google's engineers says, deleting your battery stats isn't going to improve your battery life. I haven't done any of that for a long time now and I've noticed precisely no difference (except for the extra time I've gained by not having to wait for it to finally charge up to full capacity).
hopscotchjunkie said:
The battery doesn't charge to full capacity first time around. When I used to calibrate the battery I would charge until it was drawing 0mA, then reboot; it would be drawing about 26mA, so I'd charge to 0mA again and reboot; it would now be drawing about 15mA, so I'd carry on charging to 0mA, reboot, repeat, repeat and repeat until it eventually continued to draw 0mA after a reboot. Then I'd delete the batterystats.bin file.
As one of Google's engineers says, deleting your battery stats isn't going to improve your battery life. I haven't done any of that for a long time now and I've noticed precisely no difference (except for the extra time I've gained by not having to wait for it to finally charge up to full capacity).
Click to expand...
Click to collapse
I know about Google's statement.
The battery would drain fast, then, when it reaches 1% or 5%, you would be able to use your phone like it had 30%. Just that it shows the values wrong. Calibrating the battery should fix that...
Anyway... I'm not going to struggle any further.
I'll tell what I've done;
- I have installed Battery Balibration app and CurrentWidget,
- Waited battery charging till reached 0ma,
- Removed battery stats and restarted,
- Then waited to drain battery and shut-down itself,
- I connected USB charger to PC and TURN ON THE PHONE !!
- Again waited battery to reach 0 ma,
- Then plugged off and monitored that current widget shows the range btw 3-10 !!
I don't know exactly if it helps but, maybe you should turn on your DHD while carging..
For further instructions you may qant to check this topic;
http://forum.xda-developers.com/showthread.php?t=1226016
Formhault said:
So, I am using MIUI 2.1.12 with LorDModUE 8.6 CFS 2WCR kernel.
I have installed 4EXT Recovery Controller and CurrentWidget.
With CurrentWidget, I monitored the battery while charging until it reached 0mA (which means the battery is as full as it can get).
With 4EXT Recovery Controller I removed the batterystats.bin file.
I drained the phone until it shut itself down. Then I charged it (without powering it on) until it was full (LED was green).
I power on the phone... 99% battery.
I plug in the charger... it says 26mA (which means it would reach 0mA as in full charge in another 20-30 minutes).
WHAT THE HELL?!
This never happened while I was using the default CM kernel included in MIUI. Only happened with Tiamat and LordMod.
--
Seriously, guys, what is the best way to calibrate the battery?! Perhaps I should not have let it shut itself down, but plug the charger when the phone was at 1% (which lasted for another 20-30 minutes, by the way)?!
Click to expand...
Click to collapse
Theres a better alternative, use the battery calibration app in the market
https://market.android.com/details?id=com.nema.batterycalibration&hl=en
It's always worked a charm for me.
knp3385 said:
Theres a better alternative, use the battery calibration app in the market
https://market.android.com/details?id=com.nema.batterycalibration&hl=en
It's always worked a charm for me.
Click to expand...
Click to collapse
Right, with Battery Calibration i have solved my problem with battery, now i can use all day without charging.
Sorry if my question is a silly one...
what's the point in calibrating your battery? I mean... except for the stats (and I guess, the percentage in the bar), do you improve your battery life by calibrating it?
Duwie_80 said:
Sorry if my question is a silly one...
what's the point in calibrating your battery? I mean... except for the stats (and I guess, the percentage in the bar), do you improve your battery life by calibrating it?
Click to expand...
Click to collapse
Some says it's irrelevant, calibrating it's just an illusion
But did calibrate my battery and my battery life is improved too terrific !!
Duwie_80 said:
Sorry if my question is a silly one...
what's the point in calibrating your battery? I mean... except for the stats (and I guess, the percentage in the bar), do you improve your battery life by calibrating it?
Click to expand...
Click to collapse
fremce said:
Some says it's irrelevant, calibrating it's just an illusion
But did calibrate my battery and my battery life is improved too terrific !!
Click to expand...
Click to collapse
I don't really know. It would be silly for the Android system to display the battery percentage (up there, in the status bar) by reading the batterystats.bin.
My phone's battery level drops somewhat fast, then, when it would reach 30% or so, it doesn't drop as fast. Also, at times, when I reach 10%, 5% or even 1%, I am still able to play an intensive game like Pocket Legends for an extended ammount of time (30 minutes, for example). Pocket Legends is CPU/GPU intensive and it also requires an active Internet connection, so I'd say it's pretty power hungry.
I don't really get the entire purpose of calibration. I have done it and I can't seem to notice any difference.
I'm going to do it again, now, because I switched to a Sense ROM (RunnyDrOiD). I'll monitor the battery with Battery Monitor Pro. When it reaches +0mA, I'll reboot and so forth so forth until it's drawing 0mA, although I doubt I'll resist that much time, so I'll just delete the batterystats.bin after a few reboots, when it reachs 0mA.
fremce said:
Some says it's irrelevant, calibrating it's just an illusion
But did calibrate my battery and my battery life is improved too terrific !!
Click to expand...
Click to collapse
If everybody knew the meaning of the word "calibration" then nobody would talk such nonsense.
Calibration improves the accuracy of the percentage shown!
The illusion is that you improve your battery life with it....
Dlog said:
If everybody knew the meaning of the word "calibration" then nobody would talk such nonsense.
Calibration improves the accuracy of the percentage shown!
The illusion is that you improve your battery life with it....
Click to expand...
Click to collapse
As I said... calibrating the battery may fix the "problem" where once you reach 1% / 5% you can use your phone like it still had ~20%.
I'm gone test it too...
Hi there people, I didn't find any battery thread similar to what I'm going to say so I'll spam a little bit
I've just found as I was fooling around this: http://www.ebay.com.au/itm/PowerSki...AU_MobilePhoneAccessories&hash=item20c1a1c8ad
It suppose to be a silicon case with a battery build in(1500mah ..not bad), I don't know the dimensions but I just someone might think it as a solution to our 1230mah small battery(with this you have a total of 1730mah which is plenty)
P.S. To mods.. feel free to delete my post, I just wanted to inform the people about a solution that might be handy
evronetwork said:
Hi there people, I didn't find any battery thread similar to what I'm going to say so I'll spam a little bit
I've just found as I was fooling around this: http://www.ebay.com.au/itm/PowerSki...AU_MobilePhoneAccessories&hash=item20c1a1c8ad
It suppose to be a silicon case with a battery build in(1500mah ..not bad), I don't know the dimensions but I just someone might think it as a solution to our 1230mah small battery(with this you have a total of 1730mah which is plenty)
P.S. To mods.. feel free to delete my post, I just wanted to inform the people about a solution that might be handy
Click to expand...
Click to collapse
https://www.google.com/search?q=xda+powerskin+desire+hd
first link....
I'm experiencing the following issue:
I discharge the telephone completely and I put it under charge.
I check the phone and it says, for example, that it's charged at 3%. Ok reasonable, I've attached to the charger just few minutes ago.
After a 5/10 minutes I check it back and it's 33% charged!
Today I made a reboot while charged and after the reboot, from 32%, it went up to 66%!
I couldn't charge it to 100%, it stuck at 98%.
I've installed under /etc/init.d/ the script 87calibrator.sh by Brainmaster since I'm using CNA 1.6.0 ROM (with Air Kernel 3.9.5 voodoo standard - gov: lazy; scheduler: deadline - DeepIDLE: on, NO Screen Off Max Freq enabled).
I feel there's something that needs to be fixed... it doesn't behave like this each time... in between the ROM changes I've experienced just a few times...
(Wipe Data/Cache+Wipe Dalvik and if passing from a ROM to another I also format /system).
Is anybody else experiencing this issue?
Android is terrible with actual battery stats, just don't look at it while charging
Sent from my Nexus S using XDA
Issue? I don't see one.
The Nexus S uses a State of Charge method which can be somewhat inaccurate initially, but as time progresses will become more accurate. Often while charging and booting simultaneously, the charge will go up by a fairly large percentage. This is obviously incorrect, but over the next few hours it will settle itself at it's approximate true charge. I'm still unsure if this effects the final charge % as i havn't tested it that much, but it likely does, though it will progressively get better.
Also, it is a hardware restriction regarding charging to 100%. Stock Nexus S only charges to 96% or so without dodgy methods to actually get it up. Anything else that says 100% is purely cosmetic - this cosmetic change can be found in various kernels.
Harbb said:
Issue? I don't see one.
The Nexus S uses a State of Charge method which can be somewhat inaccurate initially, but as time progresses will become more accurate. Often while charging and booting simultaneously, the charge will go up by a fairly large percentage. This is obviously incorrect, but over the next few hours it will settle itself at it's approximate true charge. I'm still unsure if this effects the final charge % as i havn't tested it that much, but it likely does, though it will progressively get better.
Also, it is a hardware restriction regarding charging to 100%. Stock Nexus S only charges to 96% or so without dodgy methods to actually get it up. Anything else that says 100% is purely cosmetic - this cosmetic change can be found in various kernels.
Click to expand...
Click to collapse
Hi, thank you for your answer. I wasn't aware about the dynamic calibration!! Yes the 100% charge it's not physic but cosmetic, I know. It was just to mention that I don't get to full 100%.
So if the battery calibration is "by design", do you know how Brainmaster's script affects this calibration?
It doesn't. That script deletes the batterystats.bin file (somewhere in the /data directory). All this file does is tabulate human-readable battery statistics for you to view when you look at Settings > Battery, so you know how much power has been drained by each app or service, and the graphing over time. This is all it does. A charge to ~90% or higher will automatically delete this file, as you can see by the battery screen resetting itself.
Harbb said:
It doesn't. That script deletes the batterystats.bin file (somewhere in the /data directory). All this file does is tabulate human-readable battery statistics for you to view when you look at Settings > Battery, so you know how much power has been drained by each app or service, and the graphing over time. This is all it does. A charge to ~90% or higher will automatically delete this file, as you can see by the battery screen resetting itself.
Click to expand...
Click to collapse
Ah ok, than that's explaining why they all say that the deleting stats it's not useful to calibrate the device
Thank you very much man!! Much appreciated!
You're welcome mate
NC's battery can be charged, the indicator will turn green, the use of normal, but the NC battery has only 11%. Used wipe battery too useless with battery calibration (Battery Calibration not fully charged, so will charge and power correction off to the correction) is useless，I should be how to operate the battery to 100%?
Did you reboot your nook? The battery indicator is reliant on software so the software for it might of hung up. Keep in mind that software battery indicators only give you a best guess estimate as it is not an analog device attached to the battery. Batteries will fluctuate a lot during use, especially if it is a battery in an older device.
If that does not work try to upgrade your build on the nook color and see if that helps too.
meteorrock said:
Did you reboot your nook? The battery indicator is reliant on software so the software for it might of hung up. Keep in mind that software battery indicators only give you a best guess estimate as it is not an analog device attached to the battery. Batteries will fluctuate a lot during use, especially if it is a battery in an older device.
If that does not work try to upgrade your build on the nook color and see if that helps too.
Click to expand...
Click to collapse
thanks, my NC room 1.42, because the battery is only 11% can not install the official system, with a stable distribution CM7.2.Although the battery status display only 11%, but electricity can be used to 7-8 hours.
Reboot into cwm recovery and wipe battery stats. If none of that works you can try opening the nook and disconnecting the battery.
Sent from my NookColor using xda app-developers app
Hi, Let me elaborate.
My Mi A1 is running Derpfest AOSiP (The latest update). I just now noticed that when my phone is off, it shows a different battery Percentage but when I turn it on, it shows more (All while charging of course). I also noticed that 71% while off is 100% while on. I also once decided to stress my battery and see if it would go past 71% but it wouldn't because it's at it maximum capacity but the phone would keep charging. What's wrong with my phone? This looks really dangerous, charging my phone while off.
EDIT: I know the battery is fine because I just changed it a few days ago. And also nothing wrong with my charger. Could this be a kernel thing?
Thank you for taking your time reading, any help is greatly appreciated
It's probably the battery has fake capacity, download AccuBattery and use your phone as normal to determine the real battery capacity.