Database Users

Possible battery problem?

I have charged my Nexus One yesterday for the first time. I live in holland so i had to use my USB cable, and the power adapter that came with my HTC hero to plug my USB cable in.
After the phone was charged 100%, i disconnected it from the charger and only downloaded + added a widget to my home screen. After i did that the battery was already down tot 97% :O:O
Is it defective ?

i noticed having to complete a few charge cycles.. charge fully, use it till dead, charge again
now it seems to hold out much longer

Hmm ok i'll try that. But did yours also drain this fast?

what setting is your screen on? seriously though, im sure some other battery experts here would know, but i think they take a few cycles to get to maximum efficiency

malicious85 said:
what setting is your screen on? seriously though, im sure some other battery experts here would know, but i think they take a few cycles to get to maximum efficiency
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Click to collapse
What do you mean with screen setting, and what should i put it on?
Sorry totally new to the phone hehe

I've noticed this too. However as soon as the battery reaches around 50% it takes a lot more to drain so it evens out in the end I guess

teihoata said:
I've noticed this too. However as soon as the battery reaches around 50% it takes a lot more to drain so it evens out in the end I guess
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Click to collapse
Hmm ok so it also went that fast on your phone? i have been using it for about an hour now and its down to about ~90% =\, concerns me a bit.

Found out something else, concering the usage of the screen. When i look here:
Menu -> Settings -> About Phone -> Battery Use
The phone tells what uses the battery the most or something, but the strange thing is that it says:
Display 55%
Isn't that very high? Maybe that is causing my battery to drain so fast

Battery meters are not an exact science. Its using what it knows about the battery's state to guess of how much % is remaining. The battery meter will need to be calibrated once, and then overall battery should improve with your next normal 3-6 full charges.
Again, you do not need to and you shouldn't repeatedly drain the battery to 0, only once is this needed to set the phones battery meter, unless you clear it (possible within amon ra's bootloader).
As for your observation, yes that is completely normal, there is not a whole lot of definition within 3% of battery as far as displaying it. What the real picture? Enter in #*#*4363*#*# on your dial pad and then go to battery information, and you'll see the accurate voltage. (this is also accessible from "spare parts" if you have it)

Nipje said:
Found out something else, concering the usage of the screen. When i look here:
Menu -> Settings -> About Phone -> Battery Use
The phone tells what uses the battery the most or something, but the strange thing is that it says:
Display 55%
Isn't that very high? Maybe that is causing my battery to drain so fast
Click to expand...
Click to collapse
All %'s here are vs the amount of time on battery (shown at the top in h:m). If you just unplugged your phone and you go looking here, you'll see the display % VERY HIGH... because the screen has been on the entire time its been unplugged
Its a % after all of the usage since last unplugged.

i've noticed my battery life is much better since i got the desktop dock.. lots of people charge until the light turns green then immediately grab it and start using..
leave it for another hour or two and it seems to get much better.

dont know if anyone else has noticed this but the top corner indicator light turns green once the battery goes somewhere over 90%, leaving it charge longer will get you to 100

malicious85 said:
dont know if anyone else has noticed this but the top corner indicator light turns green once the battery goes somewhere over 90%, leaving it charge longer will get you to 100
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Click to collapse
Good point, I did notice this by accident a few times.

Nipje said:
What do you mean with screen setting, and what should i put it on?
Sorry totally new to the phone hehe
Click to expand...
Click to collapse
You probably found this by now, but one flick to the left and you should have a widget for WiFi, GPS, etc. The far right one toggles 3 levels of screen brightness. The brightest two settings really suck down battery.

just a tip, when you are draining it to recalibrate the battery, after you get to the point that the phone shuts off, boot into the bootloader and run that thing till it completely dies... i did this for my phone, sat it in bootloader with a bright ass screen for like 15 min before it finally finished off... get every last ounce of juice out of it before you start charging it back up

Hmm thanks for al the reactions guys. I'm going to recalibrate my battery now, and lets see if that helps a bit .
Then i have a other question, its not about my battery but since i already have a open topic i dont want to create another one .
Can anyone of you test the following:
When you are calling with someone, and your calling volume is on the maximum (so the volume of the speaker that you hold against your ear). Can anyone notice a little crack from the speaker when the other person talks a bit loud or make's a loud noise? I'm wondering if there is something wrong with mine. With several tones the ear speaker cracks a little bit, like the sound is to loud or something?

Nipje said:
Hmm ok so it also went that fast on your phone? i have been using it for about an hour now and its down to about ~90% =\, concerns me a bit.
Click to expand...
Click to collapse
Yep sounds about the same on my phone, dont worry about it lol
The draining thing is from the old nickel days, the lithium batteries are made for daily use so just treat the phone as you would normally. The battery will get better as time goes by.
Also I am not having that problem with the speaker

Hmm, I have my device since last week (Netherlands) and the battery usage is frightening. Sucking it dry in about 24 hours. I haven't let it die out completely though: I thought lithium batteries were not supposed to be used that way. Ni-Cad batteries were used that way.
Ah, see here:
Guidelines for prolonging lithium-ion battery life
Lithium-ion batteries should never be depleted below their minimum voltage (2.4 to 2.8 V/cell, depending on chemistry). If a lithium-ion battery is stored with too low a charge, there is a risk that the charge will drop below the low-voltage threshold, resulting in an unrecoverable dead battery.[citation needed] Usually this does not instantly damage the battery itself but a charger or device which uses that battery will refuse to charge a dead battery. The battery appears to be dead or not existent because the protection circuit disables further discharging and there is zero voltage on the battery terminals.
Lithium-ion batteries should be kept cool. Ideally they are stored in a refrigerator.[citation needed]
Aging will take its toll much faster at high temperatures.[citation needed]
[edit] Prolonging life in multiple cells through cell balancing
Analog front ends that balance cells and eliminate mismatches of cells in series or parallel significantly improve battery efficiency and increase the overall pack capacity. As the number of cells and load currents increase, the potential for mismatch also increases. There are two kinds of mismatch in the pack: state-of-charge (SOC) and capacity/energy (C/E) mismatch. Though the SOC mismatch is more common, each problem limits the pack capacity (mA·h) to the capacity of the weakest cell.
Click to expand...
Click to collapse
So, if you want to brick your battery, by all means, suck out all the power.

i have a mytouch but i think the things i do can be used with all androids....first recalibrating is a good way to get a fresh battery...then the brightness also helps along with any wireless things u dont use like wifi gps etc.. they should be turned off an brightness should be low...i have downloaded a app lately called automatic task killer..i think this is better than any other task manager because other task managers dont kill apps wen phone is on standby ..apps r still running wen screen is off an automatic task killer kills them..i think u should download this and also have a task manager to kill apps wen u use the phone..another thing is charging the phone wen its completely off..wait until the the light turns green then leave it on for another hour or two then turn it back on....i have seen an increase in bettery life by doing all this...any one esle have any tips ..let me kno

MY Tab stops charging 99%!

MY Tab stops chrging at 99%! And when it is pluged to charger battery percentage is stoped at 99%. What the reason might be? After i recharge it from about 95% and it finish charging.
sorry for my bad English.

fellixdesuza said:
MY Tab stops chrging at 99%! And when it is pluged to charger battery percentage is stoped at 99%. What the reason might be? After i recharge it from about 95% and it finish charging.
sorry for my bad English.
Click to expand...
Click to collapse
Same on most tabs. I think thats to prevent the battery from overcharging.

I believe the charging circuit shuts down when the battery level reaches 99%. It's a safety feature to protect against overcharging.

Bugman1 said:
I believe the charging circuit shuts down when the battery level reaches 99%. It's a safety feature to protect against overcharging.
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Click to collapse
thank you for explanation, I thought it was my Tab problem... Now I'm calmed

It is able to charge to 100%, just that it needs sometime. Mine took about 1 to 2 hours to reach from 99% to 100%. After reaching 100%, you will see the indication with battery icon (full bar) on the notification bar (on top of the screen).
Battery life will be optimized and you won't see drastic charge from 99 to 90% within mins.

Double entry.

henrylam said:
It is able to charge to 100%, just that it needs sometime. Mine took about 1 to 2 hours to reach from 99% to 100%. After reaching 100%, you will see the indication with battery icon (full bar) on the notification bar (on top of the screen).
Battery life will be optimized and you won't see drastic charge from 99 to 90% within mins.
Click to expand...
Click to collapse
That is true. To increase lifetime u should always charge it to 100%, for me it takes 1hour from 99% to 100%,

PROPER battery calibration... is getting on my nerves :/

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%.
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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....

[Q] Battery under charge that jumps to higher values

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

Battery percentage display error.

This is an issue I've noticed in not just one, but many ROMs that I've tried on my G5 Plus.
My phone is almost three years old, and with time, battery backup would gradually decrease, which is normal. But in my case, I've noticed that my phone isn’t displaying my battery’s true percentage at times.
For example: I usually don’t discharge my phone completely down to 0%, but what happens is that when I do it and plug in the charger while the phone is dead, the battery indicator doesn’t show 0%. It has showed 15-20% and even percentages like 52% and 62%. I don’t know what's wrong with my device. I used to think its some kind of ‘reserve charge’ and turns out, its not. After some reading, I came to know that my battery needs calibration. I tried doing it today, and drained my battery down to 0%. And long behold, my battery indicator started charging from 26%, instead of 0%.
Can anyone help me with this? Would be great help. Thanks!