Database Users

HD2 battery never charges to 100% in Android

Hello, I'm using Mdeejay Froyo Sense 2.4 with hastarin 7.1 kernel.
I noticed that when I'm charging the battery in Android it never goes to 100%. It reaches 96-97%, voltage goes to 4.197V and the led stays red. If, after that, I restart the phone, both in WinMo and in Android, the indicator shows 100% and the led is green.
I'm worried if the battery charging is performed correctly in Android.
I would be glad to read your opinions on that.
Thanks!
Sent from my HTC HD2 using XDA App

In the hyperdroid thread there is a command to "calibrate" your battery or something.

Turn your phone completely off. Charge to full - green led instead of amber. Boot back up and restart android. You should be good to go.
Sent from my HTC HD2 using XDA App

jdwrrzmm said:
In the hyperdroid thread there is a command to "calibrate" your battery or something.
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jelliottz said:
Turn your phone completely off. Charge to full - green led instead of amber. Boot back up and restart android. You should be good to go.
Sent from my HTC HD2 using XDA App
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Both of these are good advices; and remember when switching from build to build, you'll probably have to do this a few times.

u most likely have an extended battery ... it configures itself to your other battery , thats why its telling you that ... btw , it does charge too full battery (4.197v) only the % value is wrong

oi. hasnt this been answered 1111111 times by now? ..please people use the search feature, its not just a pretty button.

Thanks!
Thanks to all of you for the advices!
souljaboy said:
u most likely have an extended battery ... it configures itself to your other battery , thats why its telling you that ... btw , it does charge too full battery (4.197v) only the % value is wrong
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To souljaboy: No I'm using the original battery.
malaeus said:
oi. hasnt this been answered 1111111 times by now? ..please people use the search feature, its not just a pretty button.
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To malaeus: I used the pretty search button, but I didn't find anything similar, maybe because I didn't include the word 'calibrate' (I didn't know that I'll have to "calibrate" the battery). And if you had read my whole post, you probably would had noticed that this is only the first part of it. I also wrote that: "I'm worried if the battery charging is performed correctly in Android. I would be glad to read your opinions on that."
So, with no offence, I think you overreacted a little bit.
Thanks!

The full charge battery voltage is not 4.197 it is 4.202
LI-ION charges to 4.2 volts, this is 70% of full charge, after this a "Topping Charge" is applied, this can take longer than the original charge to 70%
once the battery stops absorbing charge current this is when the battery is 100%
I would suggest using "Current Widget" to observe this, android will often state a 100% charge when the battery reaches 4.202 volts, but current widget continues to show a charge current, wait until its below 50mah or so then unplug the charger, delete the batterystats.bin and reboot the phone, that should calibrate android perfectly.
If you can live with your phone turned off for a while, delete the batterystats.bin and shutdown, then charge with the phone off. this will perform a total and complete charge with full topping charge.
Just one bit of advice... do not leave your phone on the charger all night every single night after getting a perfect calibration like this, having a LI-ION battery sitting on 4.2 volts for like 7 to 8 hours a day will simply kill the battery in under a year if not within 8 months.

Visentinel said:
The full charge battery voltage is not 4.197 it is 4.202
LI-ION charges to 4.2 volts, this is 70% of full charge, after this a "Topping Charge" is applied, this can take longer than the original charge to 70%
once the battery stops absorbing charge current this is when the battery is 100%
I would suggest using "Current Widget" to observe this, android will often state a 100% charge when the battery reaches 4.202 volts, but current widget continues to show a charge current, wait until its below 50mah or so then unplug the charger, delete the batterystats.bin and reboot the phone, that should calibrate android perfectly.
If you can live with your phone turned off for a while, delete the batterystats.bin and shutdown, then charge with the phone off. this will perform a total and complete charge with full topping charge.
Just one bit of advice... do not leave your phone on the charger all night every single night after getting a perfect calibration like this, having a LI-ION battery sitting on 4.2 volts for like 7 to 8 hours a day will simply kill the battery in under a year if not within 8 months.
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Click to collapse
Very informative! Thank you very much!
Is my battery or adapter getting broken? I did both types of calibration and I never saw a value bigger than 4.197V. Even when I fully charged the phone while off and booted to Android the indicator was at 4.154V.
Otherwise, when fully charged, the battery lasts in Android almost as much as in WinMo - 40-48 hours.
Sent from my HTC HD2 using XDA App

Visentinel said:
The full charge battery voltage is not 4.197 it is 4.202
LI-ION charges to 4.2 volts, this is 70% of full charge, after this a "Topping Charge" is applied, this can take longer than the original charge to 70%
once the battery stops absorbing charge current this is when the battery is 100%
I would suggest using "Current Widget" to observe this, android will often state a 100% charge when the battery reaches 4.202 volts, but current widget continues to show a charge current, wait until its below 50mah or so then unplug the charger, delete the batterystats.bin and reboot the phone, that should calibrate android perfectly.
If you can live with your phone turned off for a while, delete the batterystats.bin and shutdown, then charge with the phone off. this will perform a total and complete charge with full topping charge.
Just one bit of advice... do not leave your phone on the charger all night every single night after getting a perfect calibration like this, having a LI-ION battery sitting on 4.2 volts for like 7 to 8 hours a day will simply kill the battery in under a year if not within 8 months.
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Click to collapse
-same here. Thanks. Very informative. I noticed it when i reach 95%, it is still charging but the rate becomes lower until it returns to my normal reading (full).
Sent from my HTC HD2 using XDA App

Thanks for the info! I never charge my battery in Android, but I noticed, that percentage indicator readings is different between Android and WM.
One more thing, I searched for "calibrate" in HyperDorid thread, and here is what I found "charge full in windows then remove battery and charge full in android to calibrate..."
I do not get it. How can I boot Android without battery, and how can I charge already charged battery?

I copied this from another thread here, it has worked for me well.
Fully Charge while Device is Off before first boot, then upon first boot go to terminal and enter these (without the quotes) and press enter after every line.
"su"
"rm /data/system/batterystats.bin"
Ensure that Keypad Lights are on when Haret is launched and you will be healed.
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Silencer23 said:
I copied this from another thread here, it has worked for me well.
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Hey that sounds familiar, lol

Haha is this yours ? I saved it on a txt

Silencer23 said:
Haha is this yours ? I saved it on a txt
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That was my post yeah. my complete tutorial is here:http://leoandroid.com/viewtopic.php?f=212&t=168
I got one for reversing the whole android process too. Im working on more install, tweaks, and any other usefull HD2 info.Ill be posting all of them there

Need help calibrating the battery

I'm looking to calibrate my battery on my Epic (epic experience froyo.) I am not sure how to do it and I cant seem to find a thread. Any help would greatly be appreciated. Thanks

Charge your phone to 100%.
Boot into Clockwork recovery.
Advanced>Clear/Wipe Battery Stats
Boot up and start using your phone. Use it until it dies.
Charge back up to 100%, not interrupting the charging.
Your battery is calibrated.

my battery charges to 97% and the blue led comes on. is that 100% but displays 97?

odd...now it charged to 100...lol im so confused

Is there a fast way to drain it to zero?
Or does draining it faster than average use cause calibration to be off?
Sent from my SPH-P100 using XDA App

Battery calibration is covered in a few different places on multiple threads.
warlar12 said:
odd...now it charged to 100...lol im so confused
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muyoso is right - I do that 2-3 times to define the trough and crest (valley and peak) of battery life.
It isn't good for the battery health to drain it past the point it first shuts off (so don't turn it back on until its powered externally). It also isn't good for battery health to overcharge (er, "bump" charge it repeatedly to full).
So when you get to 100% (or when it tells you its "full" - may appear as 97 or 98 - just follow the pop-up) its ready to be unleashed.
Of course, I didn't define the battery management software for the phone so I don't know for sure. But this seems to be the common wisdom contained in the threads here. Good luck.

I have found that some kernels charge to 100 and then let it drain to 96% or so before recharging to 100%. They repeat this over and over until you unplug it, so when you unplug it, its the luck of the draw as to what percentage you are at. Some other kernels charge to 100 and keep it there until you unplug it.

There should be an article in the wiki, or at least a guide for the begginers. Lol at least I havn't bricked my phone yet.

I've had this same problem even with Calibration. Sometimes I get 100, sometimes I dont. With the external dock charger, it never tells me less than 100 though on my extra batteries, but my phone is luck of draw like said before.. I've calibrated twice, and I dont have the patience to do it anymore.

[BUG] Phone won't full charge battery (with At&t 4.1.83)

don't know if someone point out this already..
impressed by the short battery life of my Atrix, definitely lower than i expected, i make this try, and that's what i found out..
if you full charge the battery (phone shows "charged" or "100%" if you charge it when off) , then pull it out WITHOUT disconnect the usb charger, the phone reboots, then it shows a big picture of a battery with a question mark in it.. if you put in the battery again, the charge is stuck at 60%, and it takes about another hour to get the battery full..
so it seem that the phone think that battery is full, and stop charging it, when in fact it isn't..
if someone had a Motorola Milestone before, this was a known bug, due to the motorola kernel, who was solved only by some later Roms..
i haven't yet tested if using this, battery life is effectively longer, (just discovered), but with Milestone it was. a lot.
maybe our battery life can be better than it is now, if we can make phone recognize the full charge when it realy is..
P.S. i'm on stock At&T froyo.. if this was solved by latest kernel and Gingerbread i'm sorry for the useless post..

i can confirm my battery life improved after charging my phone in that way, like it was with Milestone and according to what i expected..
in fact, to charge a 1900 mA battery with a 850mA/h wall charger, it MUST takes, in a perfect world without energy dissipation, about 2h20' from discharged.. don't know about your, but my Atrix normally takes less, so it seem more than probably that it isn't really full charged
still waiting someone who test this on Gingerbread.. hope this issue's gone..

divicos said:
still waiting someone who test this on Gingerbread.. hope this issue's gone..
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Just tried it on GB 4.5.91, when I popped the battery back in it said it was at 5%. It's charging up now, I'll update when it's done charging up...

If you have CWM you can clear the battery stats, then use Battery Calibration to fully charge and calibrate. I usually leave the phone charging for about 15 minutes after I get the fully charged message, then calibrate.

CaelanT said:
If you have CWM you can clear the battery stats, then use Battery Calibration to fully charge and calibrate. I usually leave the phone charging for about 15 minutes after I get the fully charged message, then calibrate.
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So you reckon his battery isn't calibrated. If yours is, can you perhaps try what he suggests & report back? That'd be useful!
(I'm calibrating mine right now otherwise I would have tried..)

privatedoodle said:
Just tried it on GB 4.5.91, when I popped the battery back in it said it was at 5%. It's charging up now, I'll update when it's done charging up...
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Same here, how did you go?
Mine seems to be stuck on 5%
If I boot the phone, its 100% and 4200mV but as soon as I unplug it it goes to 99% and 41** mV

h0mbre_au said:
Same here, how did you go?
Mine seems to be stuck on 5%
If I boot the phone, its 100% and 4200mV but as soon as I unplug it it goes to 99% and 41** mV
Click to expand...
Click to collapse
That's where I was for a long time (stuck at 5%), so I decided to calibrate the battery then give it another go. Right now the battery is draining, hopefully by tomorrow I'll have some results worth posting...
EDIT: After recalibrating, draining, and recharging, the battery still says 5% when you pull it and replace it. I'm charging up overnight, will update again tomorrow.
2ND EDIT: Charged for about an hour and a half, and it went up from 5% to 15%. After another 7 hours, it was still at 15%. Looks to me like a glitch in how the phone reads the battery, but don't know how much it's actually affecting battery life.
Today's my first day trying Green Power, so we'll see how that does.

so it seems Gingerbread acts in a different way..
maybe this bug was solved, with latest kernel, since if you're stuck on 5% and don't increase, phone is definitely NOT charging... it seems that it doesn't well recognize the amount of charge, but probably it is full..
i repeat, mine goes from 60% (when i pull and put the "charged" battery) to 100% in about an hour, bringing the total time of charging to 2h 15', that is how it needs to charge a 1900mA @850mA/h...
it's maybe simpler to check if it was solved or not.. if your phone takes about that time to full charge, we can assume that's act properly..
will try the calibration, thanks for the hint..

[Q] Battery calibration messed up my battery? Extremely slow charging...

Hi. After downloading the "battery calibration" app from the play store, my battery started charging extremely slow. It went from 35 to 60 in three hours after installing this app. It usually would have been finished charging by then. After noticing this issue, I reflashed the rom (eclipse rom), but the problem persists. Does anyone have a solution to this? Will I have to buy a new battery?

I use battery calibration haven't had problems you maybe looking for issues since u tried something new the reason I say that is that it only removes the battery bin file like the app says when u open it if u charge fully use it and only once not suppose to use unless u flashed new rom. All it does is remove the battery stat file from os and replaces it with a fresh one so you don't have fake stats from last rom because different ROM's usually have much different battery life. So this would lead me to belive it cannot effect the power of charge recharging your phone that would be battery, cable, extension cord if used, outlet maybe post a thread on anyone with knowledge of battery Stat removal because most do it manually without the app because it's a good thing. So the app is just convince. Oh and recalibrate your battery drain it fully take it out for 2 min put back turn on wait for it to die. Then charge uninterrupted til full this let's the battery learn it's full capabilities like when I did this my phone turned on after I reinsert battery it said 0 percent and was on lol. So the percent wasn't accurate. Let it drain to 5 percent recharge fully try not to use it while charging it takes longer to charge. I hope I helped. Sorry your post wasn't answered sooner.
Sent from my SM-N900V using xda-developers.com, powered by appyet.com

matsuyamakaze said:
I use battery calibration havent had problems you maybe looking for issues since u tried something new the reason I say that is that it only removes the battery bin file like the app says when u open it if u charge fully use it and only once not suppose to use unless u flashed new rom. All it does is remove the battery stat file from os and replaces it with a fresh one so you dont have fake stats from last rom because different ROMs usually have much different battery life. So this would lead me to belive it cannot effect the power of charge recharging your phone that would be battery, cable, extension cord if used, outlet maybe post a thread on anyone with knowledge of battery Stat removal because most do it manually without the app because its a good thing. So the app is just convince. Oh and recalibrate your battery drain it fully take it out for 2 min put back turn on wait for it to die. Then charge uninterrupted til full this lets the battery learn its full capabilities like when I did this my phone turned on after I reinsert battery it said 0 percent and was on lol. So the percent wasnt accurate. Let it drain to 5 percent recharge fully try not to use it while charging it takes longer to charge. I hope I helped. Sorry your post wasnt answered sooner.
Sent from my SM-N900V using xda-developers.com, powered by appyet.com
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Click to collapse
Never mind, the issue was already resolved. I forgot about this post. Thanks though.

Battery calibration

Is there a need for battery calibration ? If say some percentage ranges the battery drops reasonably and at certain percentages the battery just dives. If so how do I do that?

No need to calibrate your battery (ITS A LITHIUM-ION BATTERY), use it as you normally would. Enjoy it till the Note 5 comes out.
But if you want to extend the lifespan in your battery (don't confuse with everyday everyday life), a complete discharge once in a while is still recommended.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Ev0d3vil said:
Is there a need for battery calibration ? If say some percentage ranges the battery drops reasonably and at certain percentages the battery just dives. If so how do I do that?
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Click to collapse

I've just recent purchased a official Samsung spare battery for my N910C. I charged it fully after I received it in the mall. But when I used it for the first time today it said that it had only a 80% charge despite the fact that I charged it fully when I received it in the mall. I did some research online and found a couple of methods on how I could calibrate the battery without having to root my device. But I'm not sure which method is the best.
The 1st is:
To drain the battery fully.
Then plug it in and charge it again.
Then drain fully again and charged it fully.
The 2nd is to:
Drain the battery fully.
Turn it on and off.
Then plug it in to charge.
Once the LED or display says it's fully charged, unplug it.
Power my device back on, which will stated that the battery not fully charged.
Plug it back into the charger and let it fully charge.
Then reboot it to check if it's full charged.
If it's not repeat the previous couple of steps again
Does anybody know which of these is the best method for calibrating the battery of a Note 4?