Ok, here is my problem.
The battery indicator its stuck either at 100 % or 95%. I know my real batery life with a program (battery indicator pro).
It seems that the only way to charge it correctly is power it down and plug it to the charger (original by the way). If i charge it while is turned on, the indicator that signal the 100% charge never pops up.
I'm using the go launcher ex, its not rooted, and the stock rom (2.2.2 International).
PS:Yeah i know, my english is pretty bad, so please bear with me.
Mine gets stuck at 80%, both charging and discharging. After 3 or 4 hours at 80% it will go to 100% a few hours later. Hopefully they'll fix this on an update! The battery itself seems to be operating properly.
Well... I guess I take comfort in knowing that I am not the only one experiencing this odd bug. I have the exact behavior and like it's been said, my 5.0 player seems to have normal battery life. I just can't trust the charge indicator.
The method this device uses to estimate state of charge is VERY primitive.
It has a fixed table based purely on battery voltage - the problem is that battery voltage can vary quite a lot for a given state of charge depending on load.
https://github.com/Entropy512/linux_kernel_galaxyplayer/blob/master/drivers/power/adc_battery.h#L87
I'm not sure why they didn't use the MAX17040 fuel gauge that is built into the MAX8998 PMIC...
mV readings seem more accurate than %:
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mV readings are a poor estimate of state of charge, since they'll go up when on a charger, and down when under heavy load.
Our battery % indicator is derived directly from those mV readings. (Which is why our battery % estimate sucks.)
What IS odd is that you seem to have a case where the charger held flat at around 4060 mV for a while - which does correspond to an 80% reading. I think I've seen that once too, might be a kernel bug there, I need to look.
Showing 100% with the voltage dropping shouldn't have happened - I've never seen it myself.
I believe the "stuck" numbers are 80%, 100% and sometimes 65%. Happens every cycle for me, 80% being worst. But on a reboot, immediately drops 25-35% (depending how long it was stuck for). So if you reboot every hour, it will show good readings (but I reboot about once a month).
My tablets battery will say 100 then how down to 3% so ill turn it off then back on and it'll say like 35%. Then most recently its been stuck on 35-37% for some odd reason.
Did you guys try wiping the battery stats in CWM?
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My SGP5 battery has been wacky since day one. First few days I didn't think it would charge past 80%, but I found if you charged it overnight it would hit 100% (that's after an 8 hour charge to 80%).
Today it showed 100% all day. I booted it and now shows 30%. The settings battery status does not show actual time on the lower scale. Like I said I was at 100% all day, and the chart goes up to a 100% peak, but doesn't flatten or go down.... as if the battery clock stopped (not there is such a thing).
Can't do a battery pull... could rooting solve this issue? At least you can do a calibration with root. I just don't want to root if this will be fixed in an update. But I really don't like not really knowing how much battery is left.
I have a similar issue. It seems random- I use it all the time and literally 1/2 of the overnight charges I put it through it gets to either 80% or 100%. What I've noticed is that even when it says 80%, it still performed as if it was fully charged.
I rooted my device a few days after I got it and I honestly didn't notice the issue until after I rooted my device. So it may be different for you.
I'm not rooted. Have you tried something like: http://www.appbrain.com/app/battery-calibration/com.nema.batterycalibration or manual calibration deleting the battery stat file? I'll gladly root if it solves this problem.
savergn said:
I have a similar issue. It seems random- I use it all the time and literally 1/2 of the overnight charges I put it through it gets to either 80% or 100%. What I've noticed is that even when it says 80%, it still performed as if it was fully charged.
I rooted my device a few days after I got it and I honestly didn't notice the issue until after I rooted my device. So it may be different for you.
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Same here, mine has all the same problems and also the Horizontal calibration never settles
Sent from my SAMSUNG-SGH-I727 using xda premium
To show how squirrely battery charging is, I monitored with Battery Monitor Widget and looks like this, one charge overnight without unplugging:
(each grid line is 1 hour, little over 1 day shown, screen was NOT on during charging)
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So I've been getting worse battery performance lately and decided to do some looking into what's going on with my battery. I've tried the battery calibration trick (wiping out the battery stats file), but I read somewhere that this shouldn't have any effect on the performance of your battery.
I've been using the program BatteryMix to monitor what's going on to see if I can find anything that's draining the battery. I only have a USB charger, so I don't know if this makes a difference, but there's an option where you can see at what time the device goes to what percentage, the temperature at that time, and the voltage of the battery. What's somewhat troubling to me is that the reported voltages at different battery percentages don't seem to match at all. For example, 3.90V was reported both at 43% and at 59%, with lots of fluctuations in between, both up and down. I wasn't really seriously using the phone at all during this time, I believe it was probably just sitting there charging in fact.
I'm just trying to figure out how to interpret this. If this is normal, what does the battery percentage even mean? And when the device plugged in at 100%, is it normal for that voltage to fluctuate? I have an OEM battery that's been in use for half a year and the program reports it as "GOOD", whatever that means. Can someone explain this or direct me to a site which explains how the OS deals with charging? Should I be getting an AC charger?
Yes, that's perfectly normal - the battery voltage can go up slightly when the load reduces, and is also dependant on temperature. You can see why voltage isn't generally reported to users!
Also, li-ion batteries don't drain in a linear fashion - they typically discharge like this:
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- When fully charged, and nearly flat they drain very quickly, but in between the voltage drain is much slower.
Was just going to post something similar to the chart above. At a constant load and temperature you could probably see a direct relation between battery voltage and percentage, something like the chart above.
I dunno, maybe its not quite problem, just curious. When I had Palm, there when I unplug my phone, it immediately turn 99, which is normal I guess, because from mathematic view, hope you will understand.
But on my SGS2 I have 100 for some time. I am using Battery widget for monitoring battery, so I see, when I charge there was 4188 mV (calibration used here), I unploged, now it is 4150mV, and still 100%. Weird.
So is there something with it?? Do you have the same with it guys??
Thanks for replies.....
Retko85 said:
I dunno, maybe its not quite problem, just curious. When I had Palm, there when I unplug my phone, it immediately turn 99, which is normal I guess, because from mathematic view, hope you will understand.
But on my SGS2 I have 100 for some time. I am using Battery widget for monitoring battery, so I see, when I charge there was 4188 mV (calibration used here), I unploged, now it is 4150mV, and still 100%. Weird.
So is there something with it?? Do you have the same with it guys??
Thanks for replies.....
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Nothing is wrong. Android uses deep sleep feature which allows it to drain very little energy while locked and throttling while idle, so you'll stay at 100% for a while. That's perfectly normal.
Also if battery loses some of it's physical capacity over time due to charging cycles - the new, lower capacity value will still be reported as 100% when fully charged, it'll just go down faster.
wow is this thread ridiculous.
back in the day, people were satisfied with 3 or 4 battery bars, just to be generally informed whether they would have to charge the device next week or the week after and these days people are obsessed with their battery life (partly due to it being generally poor). i can understand the many people who are falsely claiming the android os bug, most of which are just unable to understand percentages, other people want to show off their battery life by running the phone in airplane mode and never installing any apps, just to show off "who has the longest", while robbing their phone entirely of its purpose...
and here we are, debating about fractions of % of the battery level which mean absolutely nothing.
i guess it makes sense, that 100% stays for longer than a second, because until 99.5 percent, it would round up. or maybe it counts from 100.0 to 99.1 and only when the .0 digit is triggered, the number goes down by one, effectively most of the time showing you 1% more than you have, but honestly, WHO CARES?
The problem:
Lately, well it's been quite a while actually... my battery stats seems to jump whether i'm charging or discharging.
While charging sometimes it jumps from 30% > 80% > 100% within 15 minutes (this is what happened today) while discharging, it jumps from 90 > 50 (this quite often) then to 20% > 5% then off. My max usage time without charging is usually less than 1 hour.
I've tried to do battery reset (charging while the phone is off until full, reset battery data, then use it till it 100% drained)
I've tried to charge from 30% to about 80/90% then use it as usual.
I used original charger from motorola, used blackberry charger, samsung charger, no difference.
Unfortunately no good. Currently the ad hoc solution is to use battery powerbank constantly while I'm not near electrical plug. But its bulky and well not the best solution.
My question is, does the problem lies in the battery or at the battery controller. Is there anyway to test where the culprit is?
Thanks in advance
Battery daemon Moto uses is imperfect in calculating the battery percentage.
However, the jumps you experience and the backup you're getting, looks like your battery has worn out.
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neo.ank said:
Battery daemon Moto uses is imperfect in calculating the battery percentage.
However, the jumps you experience and the backup you're getting, looks like your battery has worn out.
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Hi, thanks for the input. My question then, will replacing the battery help to solves the problem? Cos lately the battery stats seldom runs over an hour. Here's a screenshot of my latest battery stats...
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Thanks in advance, all
galeshka said:
Hi, thanks for the input. My question then, will replacing the battery help to solves the problem? Cos lately the battery stats seldom runs over an hour. Here's a screenshot of my latest battery stats...
Thanks in advance, all
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Your battery is definitely worn out. Replace it.
A new battery will certainly remove the issues..
Use the 10% mod though else you might still have infrequent jumps..
Although I've had this phone for over a year now, it took me up until now to bring this up:
When charging, once the battery level reaches 90%, it shoots up to 100% although the battery isn't fully charged. Using Cool Tool to read the battery voltage from /sys/class/power_supply/battery/batt_vol_now shows that while idle, the voltage reaches the full capacity of 4.3 volts. However, when the phone does any sort of processing or heavy I/O, it drops to something lower, which is expected since it clearly hasn't reached full charge.
The phone acts as if the battery is fully charged, so when I unplug it, the battery level (and voltage) instantly drops to somewhere between 90 and 100% depending on how long I leave it plugged in after it first shows 100%. I don't take this as a sign of battery aging, since if I leave the charger plugged in for an hour after it charges to 100%, the battery voltage stays at maximum capacity and drains normally depending on how much I use the phone.
What I'd like to know is if this happens to anyone else, because to me it seems more like a software issue rather than something hardware-related. I am running stock 4.4.2, rooted. There are no system-level modifications due to HTC's system partition protection, which I haven't found a need to bypass.
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jim45 said:
Although I've had this phone for over a year now, it took me up until now to bring this up:
When charging, once the battery level reaches 90%, it shoots up to 100% although the battery isn't fully charged. Using Cool Tool to read the battery voltage from /sys/class/power_supply/battery/batt_vol_now shows that while idle, the voltage reaches the full capacity of 4.3 volts. However, when the phone does any sort of processing or heavy I/O, it drops to something lower, which is expected since it clearly hasn't reached full charge.
The phone acts as if the battery is fully charged, so when I unplug it, the battery level (and voltage) instantly drops to somewhere between 90 and 100% depending on how long I leave it plugged in after it first shows 100%. I don't take this as a sign of battery aging, since if I leave the charger plugged in for an hour after it charges to 100%, the battery voltage stays at maximum capacity and drains normally depending on how much I use the phone.
What I'd like to know is if this happens to anyone else, because to me it seems more like a software issue rather than something hardware-related. I am running stock 4.4.2, rooted. There are no system-level modifications due to HTC's system partition protection, which I haven't found a need to bypass.
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I don't have this issue with my M7, but I found this post which might be useful to you.