Right from the beginning the battery level does not exceed 90% while charging. I think that the battery is fully charged at that level. Is there a way to (re)set the battery level to 100% at this state, or do you feel something is wrong with the cahrging circuit. Battery live is excellent though.
// edit
This issue resolved itself. I let it charge for another 3-4 hours and now it did reach the 100% level. Sorry for this false alarm.
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i have noticed that the battery metter is completely unreliable
for example it shows 28% left (btw, i installed FInixNOverBattery for percentage indication) and after a soft reset it shows 41%
or it shows 50% and after soft reset it shows 31%
in this way i can never estimate how long the battery will last
does anybody faced this issue? any solution fot it? (i also tryed to calibrate by completely drain the battery followed by complete charge withe the device turned off)
thank you in advance!
noris08,
it is completey normal to experience big jumps in % after a reboot. The battery % is just a representation of the actual voltage of the LiPoly battery, which usually recovers (rises) quite a bit when there is no load on the battery (even for a short time).
maybe what you say it is true, but i never experienced this behaviour with any of my previous phones. and i had a few, including wm for a few years
and variations of 10-15% - i find them too big
I noticed the same thing. Any explanation for this? Or it is just that FInixNOverBattery is not reliable/compatible/accurate ?
Voltage may vary/jump around due to environmental changes and power consumption or voltage sensor may be insufficiently accurate to provide reliable voltage readings for 1% steps. This is one of the reasons why many battery drivers in WM only provide remaining charge percentage in 10% steps.
In this light, voltage on its own is not a sufficient indicator of remaining charge percentage. Other parameters, such as voltage deviation and other factors, such as power consumption and temperature may need to be taken into account to obtain a more accurate evaluation.
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.
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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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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.
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That is true. To increase lifetime u should always charge it to 100%, for me it takes 1hour from 99% to 100%,
I don't know if my suggestion is wrong or if I'm a total n00b or what the deal is, but what is up with the battery level issues on this phone? It goes from 100% down to 80% in like a matter of minutes even with no usage, it then drops steadily down to 50%, then it drops suddenly to 15%, then goes down to 10%, then 5%, then 1%. How can it be so hard to calculate a battery level?
Now I bet someone is going to come in here and bash my idea, and I apologise in advance if I look like a moron, but shouldn't the calculation for the battery level be something along the lines of:
((Current Voltage - Minimum Voltage) / (Maximum Voltage - Minimum Voltage)) * 100 = Current Battery Percent
If that would work (even if only a little better than the current method), can someone PLEASE write at least a widget or something that displays the actual battery level, not this inaccurate level that Samsung claims it to be, and if possible modify whatever it is that calculates it and replace it with said formula?
I tried this formula on my phone using a simple calculator (using 4.1V as my max and 3.5V as my minimum and a battery level widget to display the current voltage) and it seemed to work fine for me and it was a lot more accurate. I just wish it could be automated.
I think that's a common issue on Galaxy 3. Sometimes it's accurate, sometimes not.
I unplug it, after half an hour it's at 80%, then drops by 10% down to 50% and after that suddenly to 5%. Then I turn it off and on again and it returns to 50% or 60%.
But as I said, sometimes it's accurate, but I don't know what causes it.
I've tried some battery widgets, but they all display the same information.
That was a common issue that happens more frequently when you flash your phone without a full charged battery, when that happens i try to wait until the batery ends and wait 2 o 3 hours and charge the phone while its off until it shows full charge
Racoen said:
I think that's a common issue on Galaxy 3. Sometimes it's accurate, sometimes not.
I unplug it, after half an hour it's at 80%, then drops by 10% down to 50% and after that suddenly to 5%. Then I turn it off and on again and it returns to 50% or 60%.
But as I said, sometimes it's accurate, but I don't know what causes it.
I've tried some battery widgets, but they all display the same information.
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Yes, its the same with my G3.. But it always was like that, with eclair and now with froyo.
These are the files that regulate it (its in c, but you my be able to understand some parts of it without it).
They didnt calculate it like that, but used an if..else if ...else method. and with fixed values of multiples of ten (except for lower battery).
I dunno how to compile from the sources, when I do I'll change it and send it to KARMA.
Also, sometimes when its low it doesnt show it correctly. Try rebooting if you suspect that.
I've noticed that last 20-30% stays for almoust 10h, but first 80% only 1 day.
If it was only the faulty display of the percentage I normally wouldnt even care. There are many widgets that display the actual battery voltage which gives a much better indication of the actual SOC.
BUT: what really gets on my nerves is, that when the calculated battery level drops below some 10%, the G3 reduces the display brightness, doesnt let me use the camera, doesnt let me start my music app... even if the battery voltage is still at 3.7-3.8V.
The problem seems to be (correct me if i am wrong), that the G3 calculates the battery level with the minimum of the measured voltage in that discharge cycle. So if I use some app which consumes more power, or if I have many active downloads or whatever, the voltage of the battery can sag for a short time, which also causes the calculated battery level to drop. When the phone is idle again the battery voltage goes back up, but the percentage is stuck (in worst case at a very low level).
Since a reboot seems to make the phone re-evaluate the actual SOC, the question is, if there is an app (or if someone can make an app) that forces the phone to re-evaluate the SOC without rebooting (and so also reactivates camera etc.). Even better if the firmware was modified in a way, that the algorithm for determining the battery level uses a filtered value of the battery voltage so that a short term voltage sag does not affect the calculated battery level.
Every time when I plug my A500 for recharging, after the power button turned to white (or a kind of light blue...) indicating the device is fully charged, when I take a look at the battery stat, it shows "99%".
So, I noticed I only got "100%" when I boot the device while charging...
Is that common? The boot time drains 1% of battery till start the system???
It's really just an estimate of charge and you can't really take the number at face value.
I don't recall if the stock battery information shows you the actual voltage RIGHT NOW, but that's a more relevant number than the percentage shown.
An example is on my phone where it will show a fully charged battery to be at 4.210V which usually corresponds to 100%. When it says 4.210V, I know it's completely topped off regardless of what the percentage says. So there's some correlation between the voltage and what it regards that as a percentage of possible charge.
So it's not really using 1% at boot up. That's just a margin of error you can ignore.
qhorque said:
It's really just an estimate of charge and you can't really take the number at face value.
I don't recall if the stock battery information shows you the actual voltage RIGHT NOW, but that's a more relevant number than the percentage shown.
An example is on my phone where it will show a fully charged battery to be at 4.210V which usually corresponds to 100%. When it says 4.210V, I know it's completely topped off regardless of what the percentage says. So there's some correlation between the voltage and what it regards that as a percentage of possible charge.
So it's not really using 1% at boot up. That's just a margin of error you can ignore.
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Well... Ok, as long as it`s not an issue...
Sometimes mine says 100% at full charge, sometimes it says %99.
I wouldn't sweat it.
alexrb said:
Well... Ok, as long as it`s not an issue...
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If you charged it for 6 hours and it said 60%, you'd have a real issue. But 1% is really within the realm of tolerance, margin of error, etc. Definitely ignore it.
I've have a zerolemon 7500mAh extended battery. I need to run it completely flat every month to help keep it correctly calibrated. this isn't that easy when 5% on this battery is closer to 15% on the standard one. needing to have it useable makes things difficult, so I'm wondering if there are any mods to files I can make to stop the phone entering power saving mode at 5% and also anything that will let me run past 1% on kitkat..
the later has a module in xposed, but it doesn't cover kitkat.
I'm rooted and happy to do it myself if something doesn't already exist for it..
Are you sure that you need to run it completely flat? The technology inside the battery gets damaged when you run it flat. The normal battery gets callibrated by charging it to 100% pulling the battery out and then charge it again till 100%.
Lion battery's get damaged by 3 things:
- Heat
- Age
- Discharging to 0%.
maybe not entirely flat, but those are zero lemon's instructions..
googled again just now and discovered an app called rootdim mentioned elsewhere. it's primary purpose is dimming but it raises the screen light value just as well.. check http://play.google.com/store/apps/details?id=mobi.pruss.superdim for details...