After a long time no use, I took my a100 out and charge it, the red led at the power button lighted up but it never turn blue even 10 hours later. I powered it on and noticed the battery level was always 0%, everything else is ok though. If i unplug the charger, my tablet turn off immediately. Then I disassemble it, take the battery out and charger it directly about 10 minutes, then i assemble and turn my tablet on, the battery now is 35% but the problem still the same, it can't be charged, the red led still light though. Is there any body know what the problem is and how to fix it, help me please. thanks in advance.
Sorry for my bad english
Not an answer to you Q but I have to say It's always nice not having a removable battery ......can't we just get a battery door and some AA duracells for old times sake
Sent from my HTC EVO 3D X515m using xda app-developers app
Letting a battery fully discharge is about the worst thing you can do, mostly due to the fact that if the battery voltage drops to low it shuts down to prevent cell damage. Basically the battery is telling the Acer it can't be charged because its damaged.
Short answer - new battery time. If you know someone else with one swap and test.
Tapatalked from my Galaxy S II - CM10
Related
Hey there,
I tried to calibrate my battery the last few days...
There where so different descriptions on how to do it right.
But well at some point they all said to charge the phone turned of ( well it automaticaly jumps into recovery, right?).
And it was said charge it till the led goes green.
But I think it never happens in my case.
In one case I fully chagred my phone powered on and then turned it off, plugged it in again. The red/orange led staied there even after 3 hours...
The other day I fully discharged the phone and wanted to charge it in recovery mode. So I plugged it in, the red/orange led began to flash, recovery booted and I went to bed. About 10 hours late I woke and the led was still flashing as before.
I had no patience and turned it on. With the system running it tells me, that its at 100%.
Turning it off again unplug and replug it will show the red/orange led again but not flashing.
Its a european desire z (germany)
On Virtuous 0.9
With clockwork 2.something
Any ideas? Should I have been even more patient to see the green light in recovery? How long could it take?
Thanks,
- coni
Sent from my HTC Vision using XDA App
It seems the question of how to charge the battery pops up at least once a week now, with the same misconceptions. There is no such thing as calibrating the battery. All you are doing is calibrating the battery meter (just a volt meter) on the phone. Li ion batteries cannot (and should not) be calibrated or conditioned. The best way to calibrate the meter is to charge the phone to 100%, drain to about 20%, repeat a couple times. You should not discharge the battery below 20%. I cover it a little more in depth on the following post:
http://forum.xda-developers.com/showpost.php?p=11026655&postcount=7
I don't see any advantage to charging the phone while its off (except that it will charge faster, of course). I always charge mine while its on (with screen off).
I don't know why your green light is not coming on. Mine comes on after the phone has been charging for about 2 hours or less. But I am on the stock ROM, so its possibly something to do with the ROM, so you might have some better response by searching or asking in the Virtuous thread.
Yeah I know that you just calibrate the voltage meter but its just easier to say battery calibration.
Well maye the misconceptions occur because there are plenty of different answers spread and its easy to become confused. I just avereged over these methods and the consensus was to change fully while turned off.
The only way I could think of loading in recovery is better, is that the software prevents loading when it thinks battery is full (but in fact it is not), but I relly dont know.
And you say even after deleting battery stats there is no need for discharging till shutdown (to show the limits or anything)? To reset on full battery is enought?
Thanks,
- coni
Sent from my HTC Vision using XDA App
does anybody know how to delete battery statistics of the Desire Z ?
I want to calibrate battery and delete old stats.
Thanks & Greets
Well, your problem first if that you said you had recovery 2.x and that if you turned it off it automatically jumps to recovery.. you seem to have the first recovery that the power off feature wasnt quite working well.. upgrade to a 3.x then like the above user said but drain the battery until it reaches %15.. thats when the Connect To A Charger popup shows up.. and charge to 100% and do couple cycles of these..
Sent from my T-Mobile G2 using XDA Premium App
Problem:
I have been reading as many posts as possible but I haven't come across my exact situation. I apologize if this is posted elsewhere.
I am running a rooted Dinc using CyanogenMod 7.0.3. If I charge the phone while it's powered on, the amber led turns green as soon as the battery indicator hits 100%. However, recently I've noticed that if the battery is close to being full, say 90%, and i power it off to charge it, it actually takes longer for the amber led to turn green. It might take 20-30 minutes longer.
I've also noticed the amber light turn green when the indicator only showed 92%. In trying something different I also noticed that if I charge the phone while it's powered on, then turn the phone off, the led goes amber and takes another 20 minutes to turn green again (I might be accidentally bump charging in this example but I'm not sure).
Attempted Solution:
I've read that a battery recalibration might help. I tried one method that requires the battery to be pulled after a full charge, but my phone won't boot while plugged into the wall if there's no battery. Then I tried booting into recovery, where I found an option to reset the battery stats... which I just did about 5 minutes ago.
I'm going to see how things go tomorrow, but is this normal? Has anyone else experienced these things? Thanks.
Logan176 said:
Problem:
I have been reading as many posts as possible but I haven't come across my exact situation. I apologize if this is posted elsewhere.
I am running a rooted Dinc using CyanogenMod 7.0.3. If I charge the phone while it's powered on, the amber led turns green as soon as the battery indicator hits 100%. However, recently I've noticed that if the battery is close to being full, say 90%, and i power it off to charge it, it actually takes longer for the amber led to turn green. It might take 20-30 minutes longer.
I've also noticed the amber light turn green when the indicator only showed 92%. In trying something different I also noticed that if I charge the phone while it's powered on, then turn the phone off, the led goes amber and takes another 20 minutes to turn green again (I might be accidentally bump charging in this example but I'm not sure).
Attempted Solution:
I've read that a battery recalibration might help. I tried one method that requires the battery to be pulled after a full charge, but my phone won't boot while plugged into the wall if there's no battery. Then I tried booting into recovery, where I found an option to reset the battery stats... which I just did about 5 minutes ago.
I'm going to see how things go tomorrow, but is this normal? Has anyone else experienced these things? Thanks.
Click to expand...
Click to collapse
The kernel and the hardware charge it in different ways. That's why there are differences. DInc is famous for ending charging before the battery reads full. There's already a thread on that. there's not much point in getting hung up on how that thing charges. Be glad yours isn't like mine; a battery that discharges faster than it charges. Seriously.
loonatik78 said:
The kernel and the hardware charge it in different ways. That's why there are differences. DInc is famous for ending charging before the battery reads full. There's already a thread on that. there's not much point in getting hung up on how that thing charges. Be glad yours isn't like mine; a battery that discharges faster than it charges. Seriously.
Click to expand...
Click to collapse
Before I had a fast charge kernel (thanks Chad!) Using GPS with the stock VZW car charger, my battery would go down while it was on the charger!
Sent from my ADR6300 using XDA App
On AOSP roms, the LED will turn green at 90% and charge slower from 90%-100%. Perfectly normal, and I think on any rom it will charge slowly from 90%-100% to protect the battery.
The battery will charge further when you turn the phone off, what you described is what's known as bump charging. If you do this, you should notice a slower drop from 100%-90% than usual, because the battery is charged to a "true" 100%. When the phone is on and charging (above 90%), it simply keeps the battery above 90% even if it says it's fully charged, and this is why the inc is notorious for the quick 100%-90% drop.
If you do a bump charge and then clear the battery stats and use the battery calibration app will you need to bump charge again or will it know what the true 100% capacity is and keep the droid lasting longer. Not noticing much of a diffrence when i went from 1300 battery to a 1500. May get a bigger batter that'll fit the stock battery door cause I'm trying to get the best battery life i can get.
Thanks guys, I appreciate the help. I think something else that has thrown me off is that before I rooted the phone I wasn't able to see the actual battery percentage in numbers... all I could see was the battery icon. Things are now making more sense.
After recalibrating my battery I bump charged the other day and I was able to get almost 2 days out of my phone on light usage. Without bumping, I was able to end my day yesterday at 50% under my normal usage. Which is a noticeable improvement. Normally I end the day with about 10-20%. The big test will be once I go back to work next week. The cell reception is real spotty in my classroom, which I know makes the cell radio work harder.
Thanks again.
I found a lot of answers I was having about battery charging in this thread:
Your battery gauge is lying to you (and it's not such a bad thing)
I haven't had any issues with my stock, un-rooted Epic Touch (purchased day 1) until two days ago. I plug the phone in to charge, and when it is actually around 70-90%, it gives me the notification that the battery is 100% with the blue light. When I unplug the phone it instantly shows the actual percentage - somewhere between 70-90%. It started two days ago, when I woke up and was confused as to why it "dropped" down to 74% within 8 minutes of use off the charger. I have now come to realize that the phone actually stops charging when the "false 100% notification" activates. If I unplug and replug it back in, it starts charging again... until it decides to notify me that it is at 100% again. Any ideas as to why this is happening? Do I have a bad battery, bad charger, or is something else crazy-stupid going on?
Thanks for any feedback you can give me. Merry Christmas everyone!
If it were me, I'd try an old-school Evo 4G-style calibration. Run it down until it dies, charge it to full while leaving it off, pull battery for about ten seconds, charge it until reports full again, then turn it back on.
Ok cool. I'll try that and see what happens. Thanks for the quick response.
I would also try badass battery from the market. Its free and may show you some odd app or what part of the system is draining it.
You can also use better battery stats from here on xda.
Sent from my SGSIIE4GTuvwxyz....should I touch my nose or walk a straight line now?
I was using "Battery Status Bar" but just switched to Badass. Thanks for the tips.
Sent from my SPH-D710 using xda premium
below 90% this idea on why its doing this does not apply but it COULD be related.
once you get above 90% its very difficult to tell when a lithium cell is "fully charged" and its VERY easy to over charge them.
this is why car chargers kill batteries in the old days of lithium (should not do this any longer)
when your over 90% the circuitry "CAN NOT" determine if the battery is 100% or not until it "tries to charge" the battery a little.
once it tries to charge it can then determine that yes its 100%
problem is if your already at 100% you just over charged the battery (very bad for lithium cells)
now once is meaningless but do it a dozen times every week and you might knock 6 months or more off the life of that cell.
this is what car charges do much of the time. everytime you "turn the key off then on" you "restart" the charger (unless your car leaves the circuit live when off some do some don't)
each time it does this it has to "charge a bit" to see if its charged or not IE overcharging the battery.
SO what they have done on some devices is arrange it so if the charge is 90% or over IE that range where it can not "tell" without "charging it a bit" it simply refuses to charge the phone. it says "full"
until power drops below 90% then it initiates a normal charge sequence.
its possible this is whats happening? ? I really don't know just an idea.
Useful info about the battery. Probably not the issue though.
I tried letting it die, turning off, charging to "full" - turned it back on and it was at 79%. Looks like I'll be contacting Sprint tomorrow. Of course this would happen when I have to travel.
Turn off your phone and recharge until its says 100% or blue notofication . Then pull the battery out including charger so it has no power for more than 60 seconds. Put back battery and reboot and your percentage should be more accurate.
Sent from my SPH-D710 using xda premium
That's what wolfkstaag said to do, but I'll try with the battery out longer. Only did it for 10 secs last time. Thanks Kali.
Thanks for the help everyone. Back to normal. Also, thanks to the mods for moving to the q&a section.
Sent from my SPH-D710 using xda premium
Hi all,
My One X charges strangly I think. It charges really fast from about 80% give or take. It should charge slowly (given the nature of the battery). When it says the battery is charged, I unplug the device and within 15 minutes or so the battery is already at 90%. I have a feeling that the device somehow think the battery is fully charged while it is not really the case. Could this be resolved by doing a factory reset so that the battery stats will be removed? Or should I seek some other solution for it?
I'm currently on stock 1.28.xxx.x, the same problem occured at 1.26.xxx.x.
In the attachment I made a sketch of the behaviour of the charging
cheers
+1
Same here. Tried the factory reset after the 1.28 OTA, but am still getting the same pattern.
Sent from my HTC One X using XDA
Someone said battery was improved after about 3weeks use. So 7days! For me left!
Sent from my HTC One X using XDA
The green charging light goes on at ~95%. When the phone charges all the way to 100%, it disconnects itself from the charger until it goes back down to say, 95% again. When it hits 95% it will then charge itself back up to 100%, and this cycle will repeat. That's why sometimes when you pull the phone off the charger it is down to 90% or 95% or whatever sometimes within a few minutes.
I have a Galaxy S3 with the 4500mha Gorilla battery and when my phone battery % reaches a 100% the LED doesn't turn green right away. It does turn green after 30 to 40 minutes later. When my phone is off when it says 100% and the light isn't green, it doesn't show that its fully charged, and once it reaches a 100% when its off the light does turn green. My original Samsung battery works fine in this regard other than not lasting long enough. What can I do to fix this so I can keep using my extended battery.
Doubt theres much you can do. If original works as expected then its more likely an issue with the aftermarket battery reporting incorrectly.
Sent from my SGH-T999 using Tapatalk
Thats what im thinking too. battery life on the gorilla one is great, so it works as it should. I have been using like that for months and just felt like asking today, I thought maybe there was a way to reset battery info on the device so it becomes use to the extra capacity.
Sounds like you have an extended battery.
That's just how its going to work.
You may be. Able to root and calibrate the phone to the new battery capacity but I don't know since I use the stock battery.
The led turns green once the battery stops pulling electricity from the charger so the extra 1/2hr is when the battery is charging to its full 4500mah
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