So I just got my Nexus One last week, and the battery was amazing. Now all in a sudden I notice when my phone is charging, the percentage drops..? I am barely ever using it at all and it drops.
I go to the Battery Status and it says
BATTERY STATUS: FULL
but then the next one says
BATTERY LEVEL 97%
any idea? I did the battery Recalibration yesterday. But I guess it still doing it.
How I did it was used phone till it was dead, couldn't turn on anymore! Then I charged it FULLY, then I went to amon recovery and wipe battery stats..
any idea?
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I have Serendipity 4.3 on my captivate and yesterday my phone spontaneously died. Prior to this I always saw significant battery drop. However, once the phone died it wouldn't reboot or even charge. I then removed the battery and placed back then I was able to charge it. I have had it unplugged for 7 hours and I am still on 100%. I verified this in my settings and even installed different widgets to check it as well. Also, when I was having poor battery life my battery usage for display was ~89% but has now dropped to 50%.
Is there any way that somehow my battery improved this much?
stewtang said:
I have Serendipity 4.3 on my captivate and yesterday my phone spontaneously died. Prior to this I always saw significant battery drop. However, once the phone died it wouldn't reboot or even charge. I then removed the battery and placed back then I was able to charge it. I have had it unplugged for 7 hours and I am still on 100%. I verified this in my settings and even installed different widgets to check it as well. Also, when I was having poor battery life my battery usage for display was ~89% but has now dropped to 50%.
Is there any way that somehow my battery improved this much?
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I think ur phone needs a battery recalibration.
diablo009 said:
I think ur phone needs a battery recalibration.
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I performed a battery calibration just two days ago.
Your phone is definitely reporting the incorrect battery %. Reboot and see what it says or you need to reflash.
a few days ago i flashed stock jvs. and applied cf root.
now i'm facing some weird things. battery lasts only like 12h. and when i go to battery stats in "about phone" the "on battery" time says things like 1min, but the longer the phone is on, it gets longer, like 2h ...
today i tried to fully load it and wipe battery stats.
didn't work,
now i've applied semaphore. and still shows weird things. and it doesn't seem as if the battery would last longer.
didn't find a thread with this problem, only the "official" battery bug, when the percentage changes within an hour about 20% a higher...
maybe so knows?
When you say wipe battery stats, did you do the entire battery calibration procedure? I find it's most effective to wipe and charge phone overnight while it's off (Like the first charge you do when you first get the phone)
i did the calibration like it is said in another thread:
fully load battery,
go to recovery, let it plugged in for further 5-10min
unplug,
wipe battery stats
reboot and let the battery be drained until it turns off automaticly.
but still confusing...
never had this befor, on stock 2.3.4 and cfroot, normal information like 2d 3h ... etc.
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 (%)?
I used the saurom 1-click to upgrade my i897 captivate. I charged it all night and the battery meter never went above 53%. Yet there was a notification telling me the battery was fully charged and to unplug the charger.
Why doesn't the battery meter rise to full? How do I fix this problem? Is there a way to recalibrate the meter?
Thanks,
Vipe
I downloaded a battery callibrate app and thought that would fix the problem.
I was sure the phone was fully charged, although the meter says 53%. I used the program to calibrate the battery. I expected the meter to jump to 100%, but that is not what happened. It stayed at 53%. I charged all night again, but it never went above 53%.
Do I have to let the phone totally die first before performing the calibration with the app? How do I get the battery meter to go to 100%?
Thanks,
Viper
My battery has been dying at 20-30% lately. I've done all the tests from cycling (letting it completely die, then charging to 100%), to battery calibrations, full restore, full system wipe in TWRP to the point where it says "no OS installed", and then flashing the stock rom.
After all this, in just the first try, the phone died at 30%! I turned the phone back on immediately and saw that it showed 3% remaining. I decided to leave the phone on and let it discharge on its own. After 24 hours, I was surprised to see that the phone was still on and at 1%! That's a 2% drop in 24 hours. I've attached the battery usage page for reference.
Can anybody explain what is going on here?? Is this a software or a battery issue? I'm left to thinking it's a battery issue after all of the tests that I've done. Whatever miscalibration it has should have been reset when doing a full wipe right?
What's battery waster?
kboya said:
What's battery waster?
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It's a good app used to drain battery for cycling purposes.
Bump