While charging my phone.. it stops at 99% and never hits 100% unless i let it charge over night.. but as soon as I unplug it.. it drops to 99%. Is this a glitch or something that was done on purpose by Sammy? I do get fantastic battery life so that doesn't seem to be an issue.
This is normal ... don't let it get to you ....
Let you battery completely die and charge it with the phone off. Once fully charged turn it on until the light indicates it's full.
It should recalibrate.
Sent from my SPH-D710 using XDA App
Related
Hey guys, I rooted and installed mikfroyo 4.2 on my evo. I read a bit and thought I had to use recovery to wipe battery data. I did this and since then I have noticed that the battery usage/percent is off.
Ex: 100-90% goes very quickly, then 80% takes much longer.
I just plugged it into my charger at 29% and about 5 mins later its saying 56%.
The battery lasts long enough so I figure the battery is good.
What should I do aside from wiping the battery data? Do I have to calibrate it somehow?
Thanks
Sent from my PC36100 using XDA App
100% - 90% drop off is normal. Should normalize after 80%. There are some battery tricks n tips to charging if you look around. Pretty much consists of charging to full then turning off and charging some more then turn on, turn off and charge some more.
There are hundreds, if not thousands, of posts on this subject. The issue is battery longevity. When the battery reaches 100%, it stops charging (to reduce heat and increase battery life span). It only starts charging again after the battery drops below 90%. So your 100% display is lying to you.
There is a custom kernel that continues to charge the battery at a lower rate once it reaches 100%. You can find it here...
http://forum.xda-developers.com/showthread.php?t=876590
I'm using it with the Evo-NonSense ROM and it's amazing how much better battery life is. I've had the battery meter read 100% for close to an hour after unplugging.
I suppose it's possible I may have to replace the battery sooner due to using this kernel, but that's a price I'm willing to pay.
BR
The 100% > 90% is due to the kernel not allowing a trickle charge. Meaning once your phone hits 100% it switches to battery. It doesn't start charging again till it hits 90% or so. So when you unplug your phone, even if it says 100%, it is actually at 90%.
There are kernels that enable trickle charge but there is a debate going around as to whether or not it damages the phone.
sekigah84 said:
The 100% > 90% is due to the kernel not allowing a trickle charge. Meaning once your phone hits 100% it switches to battery. It doesn't start charging again till it hits 90% or so. So when you unplug your phone, even if it says 100%, it is actually at 90%.
There are kernels that enable trickle charge but there is a debate going around as to whether or not it damages the phone.
Click to expand...
Click to collapse
It could be anywhere from 100% - 90% not definately gonna be 90%
A drop of Chuck Norris's semen was placed on the IPhone. We now have the Htc Evo.
Crossrocker said:
It could be anywhere from 100% - 90% not definately gonna be 90%
Click to expand...
Click to collapse
I've been really confused lately because the meter says 100% when plugged in but the moment I unplug it in the A.M. it cuts over to 92%-96%... this makes sense now.
I own a HTC wildfire. I have some issues with my battery and I can't pinpoint out the reason, these are the issues:
It rarely charges to 100% unless I let it charge for a while and then reboot the phone. But it'll drop really quick
If its charging while switched off and I take the charger off, the charging light will stay on indefinitely
The battery goes really quick, in 90 mins my battery charge is now 38%
When switched off and charging, it never gets the green fully charged light, but if I switch it on it'll say 100%
Do I need a new battery?
Sent from my HTC Wildfire using XDA App
When I wake up and take my phone off the charger, it's always at like 98 or 97%. I have battery monitor and when looking at it, it shows that it gets to 100% through charging, then goes down to 98 or 97 and then stays at that state throughout the night.
Anyone else having this happen with their phone? With enough battery issues, it seems these 2 or 3% could be an hour of standby.
When the phone hits 100% on the charger it doesn't charge anymore to prevent overcharging.. pretty common feature in most phones nowadays.. if it goes below a threshold it charges again until 100 and the process repeats
Sent from my Galaxy Nexus using xda premium
same issue... my thunderbolt use to hit 100%, but the gnex stops at 99 or 98%. if i unplug the charger for few seconds, plug it back in and boom it goes to 100%
Same issue here. Seems to stay on 99 until I unplug charger and plug it back it.
Sent from my Galaxy Nexus using xda premium
This isn't an issue..
volfman said:
Same issue here. Seems to stay on 99 until I unplug charger and plug it back it.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
If you want to get 100% (not saying it makes a difference when it's showing at 98/99%, what volfman suggest it the best way to do it. I did it with my SGS2
it should charge to 100% in the first place. another bug that needs to be fixed... hopefully the 4g gets fixed first cuz with this, i can live with.
The reason i want `100% is cuz its nice to see the 100% rather then 99%.
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
My battery wasn't holding a charge so I went to a T-Mobile store to get it replaced and they asked me if I leave it to charge overnight I go yeah so it has charge for the day and they told me not to because it destroys the charge. So xda community aka the experts let me know if this is true and if it is, how am I supposed to charge my phone?
Sent from my SGH-T999 using Tapatalk 2
I've charged this phone almost every night since I got it (early June) and my battery is still doing outstanding. There are times when charging it over night the battery will set it self to draw battery so it can recharge and not cause harm I believe. There are many superstitious theories and others that "battery experts" say charging over night can be harmful. Overall I don't buy into too much. I always try to unplug as soon as it hits 100% though.
T-Mobile SGS III
I don't think its true either.. I've charged all my phones like that since I can remember and never had problems with battery, other than software related problems that drained battery, but fixable.. Did you check if maybe it was software related and not due to the battery?
Sent from my SGH-T999 using xda premium
That's so stupid. With how limited these batteries are not being able to start the day at 100% is unacceptable.
I always leave it to charge overnight.
Just now I unplugged by mobile after overnight charging
Sent from my A90S using xda app-developers app
Its bs they are like bots so they are programmed to say these things. Basically to appear as they know the "answer" to your problem. So got work in the morning I'm not suppose to charge my phone overnight and leave with 5% battery in the morning, they know they charge their phone every night. When a rep ask me that same question once I said "No I leave to work with my Samsung flip phone because I can't charge my 500 phone overnight".. *sarcasm*.
Sent from my SGH-T999 using xda app-developers app
All nighter here too. No issues whatsoever. Mine Gets warm when charging the cools back down after fully charged.
Sent from my Galaxy S3 using neighbors wifi
This use to be true on older phones. The galaxy S 3 and most new phones stop charging once they hit 100% it will only start charging again when it drops under 100.
And even before on older phones where it wasn't recommended I did it anyway. No harm done.
I've done this with all my phones, nothing ever happened to them
Sent from Flip's S3
Overcharging protection, while present, can fail.
If you guys want to have a full charge in the morning, try an outlet timer - or put it in airplane mode overnight (I do that, battery is down only 1-3% after ~8 hours). You could also turn off data + wifi - so phone calls are still there if you are really worried about getting an emergency call in the middle of the night, the call function is still there, but apps aren't syncing and wasting battery and sleep time doing so.
I'm just not comfortable with the fire risk of leaving it in overnight. Sure, it probably won't fail - but if it does ? Why take that chance when there are other solutions ? I just charge it at my desk before going to bed, unplug it when it reports full charge.
It's the same kind of risk as putting a 100W bulb in a 60W socket - sure, you might be fine for a while, you might never have problems - but you might also start a fire when components fail under the stress.
Pennycake said:
Overcharging protection, while present, can fail.
If you guys want to have a full charge in the morning, try an outlet timer - or put it in airplane mode overnight (I do that, battery is down only 1-3% after ~8 hours). You could also turn off data + wifi - so phone calls are still there if you are really worried about getting an emergency call in the middle of the night, the call function is still there, but apps aren't syncing and wasting battery and sleep time doing so.
I'm just not comfortable with the fire risk of leaving it in overnight. Sure, it probably won't fail - but if it does ? Why take that chance when there are other solutions ? I just charge it at my desk before going to bed, unplug it when it reports full charge.
It's the same kind of risk as putting a 100W bulb in a 60W socket - sure, you might be fine for a while, you might never have problems - but you might also start a fire when components fail under the stress.
Click to expand...
Click to collapse
Is there some sort of smart outlet that can stop charging when it reached 100%? I guess in a way the same as the outlets that has a master outlet and able to turn off the rest when the master outlet is off?
I charge mine overnight
I usually let me charge overnight, it hasn't caused any problems for 6 months now.
It is true that your battery being at 100% charge (even if charging to the battery has stopped) is harder on your battery and overall capacity will lower at a faster rate than one stored at 60%. The thing is the difference is negligible over a year. It is technically best for your phone to be charged to 100% and then removed from charge so the battery can drain but we are talking about the difference of wether the half life of your battery is 3 or 4 years. overnight charging is not why your battery has failed.
Chuckatron said:
It is true that your battery being at 100% charge (even if charging to the battery has stopped) is harder on your battery and overall capacity will lower at a faster rate than one stored at 60%. The thing is the difference is negligible over a year. It is technically best for your phone to be charged to 100% and then removed from charge so the battery can drain but we are talking about the difference of wether the half life of your battery is 3 or 4 years. overnight charging is not why your battery has failed.
Click to expand...
Click to collapse
Agreed it was probably a defective one he got. Even though the s3 is really awesome I'm not sure all if us will still have this phone 3 or 4 years from now. So go ahead and charge it don't worry.
Sent from my SGH-T999 using xda app-developers app