Database Develop

Battery Charge Issue

This might have been answered somewhere, but i couldn't find.
My kaiser takes an hour atleast to get to 67% battery level on the power adaptor and as soon as it reaches that level it takes just 5 min to get to 100%. This is very strange. I performed a Radio upgrade to 1.70.19.09 a day before. But this is strange?
The battery status app starts with whopping +600mA of charging current on a 0% charge and drops to 100mA at 50% charged and to +53mA when it is around 67% and then in some time it says 100% with a charging current of +53mA.

sahuja said:
This might have been answered somewhere, but i couldn't find.
My kaiser takes an hour atleast to get to 67% battery level on the power adaptor and as soon as it reaches that level it takes just 5 min to get to 100%. This is very strange. I performed a Radio upgrade to 1.70.19.09 a day before. But this is strange?
The battery status app starts with whopping +600mA of charging current on a 0% charge and drops to 100mA at 50% charged and to +53mA when it is around 67% and then in some time it says 100% with a charging current of +53mA.
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Have you tried changing the radio back? To see if that affects anything?

Is your battery life normal? Does the same happen if you let the battery discharge once and charge it again? Changing the radio could have reset the battery meter calibration and it's just finding its way again.

kilrah said:
Is your battery life normal? Does the same happen if you let the battery discharge once and charge it again? Changing the radio could have reset the battery meter calibration and it's just finding its way again.
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Do you mean to say that i should give a few recharge cycles( a week may be) and this should be resolved?

Run the battery down completely once until the device turns off, that will also allow you to see if you have normal battery life, then recharge fully. Once is enough.

kilrah said:
Run the battery down completely once until the device turns off, that will also allow you to see if you have normal battery life, then recharge fully. Once is enough.
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Doesnt work. I completely discharged my kaiser such that it switched off automatically. Recharged to 67% and then shortly 100%. i dont see 70-80-90% charges.

Once it switches off, remove the battery, wait 10 seconds, put it back in, turn on again. If the phone still says low batt and turns off again then your battery is really empty. If not the calibration is really off, run down again until it's really empty, then recharge without interruption until you get the green LED.
You didn't say if your battery life was normal.

same problem here
I have experienced the same issue. Battery is less than 60% and suddenly it reaches 100% (in a couple of minutes). My battery life seems actually very short to me but I must say I started using HSDPA the last week (my carrier finally offered it) and off course my battery lasts much less than before, so it could be just an impression. I flashed hyperdragon III Blackstone (nov 1st) last weekend and the radio is 1.65.24.36.
Just to give you an example, this morning I was listening to streaming radio over HSDPA and battery dropped from 100% to 40% in 50 minutes (screen was off all the time)
So I will try to empty my battery completely and charge it again. I´ll report after that.

Phone shutdowns itself when battery hits the 7% mark

I'm trying to nail down if this is normal behavior or not my phone always shutdowns itself when the battery level goes below 7%, no matter what.
then I turn it on it boots and shows 0% of battery left then it shutdown again, next time I try it's totally dead.
Tried with a battery calibration improved the overall battery life but that mark is still there.
Is that normal? I mean when I used to have a G1 it lasted until 1% or so.. 7% can be very well an extra hour of usage that I'm loosing.

emudojo said:
I'm trying to nail down if this is normal behavior or not my phone always shutdowns itself when the battery level goes below 7%, no matter what.
then I turn it on it boots and shows 0% of battery left then it shutdown again, next time I try it's totally dead.
Tried with a battery calibration improved the overall battery life but that mark is still there.
Is that normal? I mean when I used to have a G1 it lasted until 1% or so.. 7% can be very well an extra hour of usage that I'm loosing.
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I've noticed the same thing. It'll be interesting to see if anyone has a solution.

7% of battery life is just a number. It could very well be inaccurate, and simply reporting 7% when you actually have 0%. When you reboot and it shows 0% just backs this idea up. You are not "losing" an hour of battery life, you simply never had it.
To check this, use spare parts to look at the voltage of your battery when it approaches 7%.
Also, this belongs in the QA section.

I'll give it a try, interesting is the fact that both Cyanogen RC3 and Battery Monitor are reporting the same thing.
Will keep an eye on the voltage, what should it say ? something near 0?

seriously?
AFAIK li-on battery never be below 5% or 7% why?
because if you get below of this the battery will be dead and will not work anymore. so thats normal.

zen kun said:
seriously?
AFAIK li-on battery never be below 5% or 7% why?
because if you get below of this the battery will be dead and will not work anymore. so thats normal.
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I've also read its normal but if its normal why isn't it calibrated to show 0% when its actually at 7%? My phone goes off at ~10%
btw there are so many battery threads lately.. http://forum.xda-developers.com/showthread.php?t=702167

Yeh, mine also goes off at around 10%.

it seems normal then , time to get myself a spare battery ... travel can be painful if no power outlet / usb port is near me

Yes its kinda normal. My phone has always shut down at 8% from day 1. I think its because of what we're talking about in the battery cal thread personally.

[Q] Battery Calibration

Hi fellow O2x users -
Has anyone else had a go calibrating their O2x battery? Either using marosiges' battery calibration app, or manually removing the batterystats.bin file?
I've done the following calibration cycle:
Charged to full via the wall charger, mV figure was ~4188 mV, which I've read is normal, then removed the batterystats.bin file;
Used the phone till it powered off on its own, mV figure was ~3450 mV, which is higher than normal (~3200)? Or is this normal for the O2x?
Recharged the phone uninterruped back to 100%, mV figure was ~4180 mV, so nothing wrong there again either;
Normal usage/charging of the phone over 4 days, and battery uptime is worse than before calibration. (Uptime was worst immediatly after calibration, and gradually improved, but it never got better than before calibration).
Thinking that someting had gone wrong, I repeated the calibration and observed the same mV figures as above. So far, after another 3 days, battery uptime has not improved beyond the previous calibration, and definitely not to the level of what it was before calibration.
The only things I can think of are:
The O2x requires a higher minimum level of charge to power the dual core chipset and CPUs/GPU;
The O2x has a custom batterystats.bin file to begin with, and allowing the android OS to recreate the file doesn't work.
Does anyone have any insights? I'm running stock Australia 10b ROM, rooted, with some of the bloatware packages disabled. I'm not affected by reboots/BSOD's or lock-ups.
(Marosiges' original thread, [APP] Battery Calibration - EASIEST WAY! - Version 1.2, is in the "Android Development and Hacking" section, which I unfortunately can't post to yet.)
Thanks, this forum rocks!

EVERY android phone/device I have ever owned has this problem. I just don't see what the battery stats file is used for if we just have to keep deleting it. None of my other phones have had this stupid file and they could ALL read the battery percentage just fine and as a side note also lasted longer I had a thought of making the file read only so the phone could not write to it and see if that makes the phone read the battery from the actual battery without miss informing us using the batterstats.bin file ?
Sent from my LG-P990 using Tapatalk

stevvie said:
...they could ALL read the battery percentage just fine and as a side note also lasted longer...
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That's what I was thinking/wonderng - Li-Ion battery packs have built in circuitry that handles its state, without the need of a software layer.
Although it seems that other android phones are able to discharge to a lower voltage (to ~3200 mV) - i.e. they have more usable capacity? I'm wondering why the O2x goes off at ~3450 mV...and if that's normal.

My best advice is to avoid using stock.
It is too irregular.
If the 3G signal is weak i get constant 3G and GSM hopping which drained the battery in 2h.
But if it was good it lasted way longer.
not sure about the shutdown voltage, i'll give it a shot later
hmm i think mine shuts at 3450 as well maybe even higher, idk
but mine lasts for a day with medium usage.

i tried to look into this earlier and my battery drained to 3350ish before it shut down on me.
i guess that's its limit. i'm running on stock:
BIN_LGP990AT-00-V10b-ESA-XXX-APR-21-2011+0

I'm currently calbrating my battery as I flashed a new ROM, phone was now just shutting off at 3369 mV!
Hopefully battery performance gets better soon!

Deleting batterystats.bin did get me better battery life. But after 6 days I had a huge drain.
Rebooted phone, removed .bin again and it's going ok again....

I'm not particularly wanting to calibrate my battery too frequently - full discharge cycles are bad for the battery.
At 30% charge this morning, my voltage was at 3700 mV. If you use 100 mV as a rough gauge of 10% charge, that would give me ~3400 mV at a 0% charge level.
I guess it's just normal for the O2x battery to be flat at ~3400 mV.
If there are any other O2x users out there who have different voltage figures do make a post. Thanks!

Consistently Incorrect Battery Percentage

Hey all,
I have had terrible misfortune in the realm of battery stats. Ever since CM7 (and maybe even before) my phone is unable to figure out how much battery is left. Here is a common scenario:
Charge phone overnight, use phone throughout day, battery dies after 6-7 hours of moderate-heavy usage. I plug it in, reboot, and then it reports ~60% battery left.
Another common scenario is that it will dwindle around 5% battery or less and go up and down until it finally dies.
I know that this is a misreading of the battery and not battery drain or a rogue app because when I flash a new ROM the battery life is amazing for 1 day. The day after I flashed Team Hacksung's ICS rom, I got almost 17 hours of battery life with 2.75 hours of the display being on and 30 minutes of Google Music. I was blown away! But even then it was dwindling around 5% not knowing when it would actually run out. The day after, it was back to its old tricks of misreporting the battery percentage.
Today I charged it to 100%, unplugged it, and shut it off. Then I plugged it in while it was off and let it charge to 100% again and wiped battery stats in Clockwork mod. I'm getting ok-ish battery with that, but it's not even close to how good it was when I first flashed ICS.
Anyone have any ideas what I could try?
Thanks!

When you wiped the battery stats did you let the battery fully discharge and shut off before charging again?
After wiping battery stats it is recommended to let the phone fully discharge to the point where it will automatically shut off.

Keep in mind with the age of our phones, it could just mean your battery is dying. Try the above method, but in my experience uncalibrated battery only last a few days. The phone will "fix" it by itself the longer you use it.

j.curtis.369 said:
When you wiped the battery stats did you let the battery fully discharge and shut off before charging again?
After wiping battery stats it is recommended to let the phone fully discharge to the point where it will automatically shut off.
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That's what I'm doing currently. Battery life seems improved, but we'll see what happens. It's nearing death now, ~6%. At this point it will probably misreport it for a few hours until it finally dies. I left it unplugged overnight, so now it's at 19.5 hours uptime with 1.75 hours display time.
Definitely improving! I hope that it successfully recalibrates.

Battery stats have nothing to do with how the os calculates remaining battery...they are what is displayed in settings>about phone> battery use and are reset each time you charge to full.
You're just giving it a good bump charge...wiping the stats is just a placebo effect.

studacris said:
Battery stats have nothing to do with how the os calculates remaining battery...they are what is displayed in settings>about phone> battery use and are reset each time you charge to full.
You're just giving it a good bump charge...wiping the stats is just a placebo effect.
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Seriously? Wow I didn't know that. Is there a way to actually reset how the OS calculates the battery?
Does this app do anything?
https://market.android.com/details?...xLDEsImNvbS5uZW1hLmJhdHRlcnljYWxpYnJhdGlvbiJd

Nope...that app is just perpetuating the myth of what the batterystats.bin file does.

Don't hate me for this but, Then how come Roms usually give me better battery life after a full cycle? not bump charging or deleting battery.bin just running it?

Because the system for tracking the remaining power is getting to know your battery. once it gets a feel for it, it's more accurate. In theory anyway

So the "give it a day" is still true, at least in theory?

Sure
10 char

battery gauge temporarily fixed by removal and replacement of battery
Ever since I rooted my phone, I've noticed that the battery gauge/meter is way off. I keep an eye on the charging voltage and try to pull the plug around 3.92 volts. Problem is, the gauge is always reading low until I pull the battery, wait a few minutes, and then reinsert and boot up. Then it's fine for a while, but I notice it creeping down even though I keep topping it off with a charge to keep it around 3.92 volts.
What's going on? Do I have to fully deplete the battery and charge to full to have an accurate (or somewhat accurate) battery gauge? Do I have a bad battery (this battery has been used only a couple months)? Is something else going on here? Recommendations, studacris? Doesn't the os use battery voltage to calculate state of charge (%)?

[Q] Battery jumps from 4% to 0% and shuts off - normal?

When my battery is getting low, I've started to notice recently that it never falls below 4%. Instead of counting down to 1% and shutting off, it just shoots down to 0% and immediately starts the "Power Off" screen. Is this normal? Anyone else's Nexus 6 do this?
I've seen the post about the Nexus 6 that would shut off at 73% consistently and I guess this could be related to a bad battery or calibration, but I was just curious.

j.bruha said:
When my battery is getting low, I've started to notice recently that it never falls below 4%. Instead of counting down to 1% and shutting off, it just shoots down to 0% and immediately starts the "Power Off" screen. Is this normal? Anyone else's Nexus 6 do this?
I've seen the post about the Nexus 6 that would shut off at 73% consistently and I guess this could be related to a bad battery or calibration, but I was just curious.
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I've only ran it down that far once and yes, it shut down at 3%

@j.bruha I assume you know this, but just in case - Li-Po batteries don't really do well with extremely low charge levels. Try to avoid depleting the battery charge level to anywhere close to 0. Most folks recommend keeping the battery level at 30% or higher for longer overall battery life (not the time that your battery lasts from charge to charge, but the number of months/years before you will need to replace the battery itself)

Mine goes all the way down to 1 % and shuts down. I can still use phone when it shows me 2% left. Never seen it shut down at 4%. Discharge battery and fully charge it, Sometimes it does help. good luck.

jj14 said:
@j.bruha I assume you know this, but just in case - Li-Po batteries don't really do well with extremely low charge levels. Try to avoid depleting the battery charge level to anywhere close to 0. Most folks recommend keeping the battery level at 30% or higher for longer overall battery life (not the time that your battery lasts from charge to charge, but the number of months/years before you will need to replace the battery itself)
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I think there's a lot of over thought about caring for batteries. I think the best advice is to charge it as it needs charging.
Li-Po batteries don't do well at extremely low charge levels. That's an understatement. They become physically volatile and very actually dangerous to use. This is why when you deplete your battery from 100% to 0%, you're actually discharging from 100% to something like 20%. The battery chip does not let the battery deplete fully and is calibrated to report that 20% as 0%. There really shouldn't be any harm letting the phone shut down at "0" because it isn't 0.

My phone shuts down at ~1% sometimes 2%. It has shut down at 3 once but it depends. I usually don't run my phone down that low, but if I do I expect it to turn off at some point. I would see if you can have it repeat the behavior so you know whether or not its a bug.