Develop Bugs

Long charging duration. What should I do? Confused! Please advice.

Guys this issue is annoying me. My device is having some charging problems. I have measured the charging time for last two charges, and its taking 3 hours 40 mins for 10% to 100%, and 4 hours from 0% to 100%. Where most people are saying it takes around 3 hours, from a complete drain to full 100%.
So have any of you guys ever measured the actual time of charging? A lots of comments I see say around this or around that, or from 2 hours to 3 hours, well that's not what I need. If anyone has measured the time then please post here. I'm thinking about going to SC, but I don't wanna go there until I'm totally sure that there is a problem.
PS: I'm talking about Stock charger, (2A) plugged in AC power source. And device should be on, not off.
Btw- There should be a technical answer to this, the charging current is 2A and the battery is 3100 mAh, so how could I do the math?
Thanks in advance.
Sent from my GT-N7100

I don't know the math stuff but why don't you try calibrating the battery - worth trying !

Knowing that info is only half the truth. How the phone charges the battery and how much energy your phone uses during the charge matters too.
Sent from my GT-N7100 using Tapatalk 2

The time taken to charge is a pretty simple mathematical formula. But the rest of the calculation is complicated.
If you phone is on, how bright is the screen, is the display on or off, are you on wifi or network data, are you syncing email every 15 minutes or every hour, are you using the phone to send messages during charge, have you got gmail, dropbox, facebook, instagram, whatsapp, etc etc etc all doing a sync at regular intervals during the charge?
All of those things will use up some of the charge as its going in, so the charger is fighting against you.
I've been charging off usb at work and struggled to gain 20% in 8 hours because of my usage pattern.

Theoretical time for charge is about 1:30 hrs. Reality, start and ending charge should slow down (for safety), heat slow downs, plus usage of phone as spoken above I guess it could take up to 3 hrs.
It's not great to do a full charge regularly. I tend to keep mine between 40-90% for maximum life cycle of battery.
Perhaps try resetting battery stats? Try a different 2a charger?
Sent from my GT-N7105 using Tapatalk 2

wisewood said:
The time taken to charge is a pretty simple mathematical formula. But the rest of the calculation is complicated.
If you phone is on, how bright is the screen, is the display on or off, are you on wifi or network data, are you syncing email every 15 minutes or every hour, are you using the phone to send messages during charge, have you got gmail, dropbox, facebook, instagram, whatsapp, etc etc etc all doing a sync at regular intervals during the charge?
All of those things will use up some of the charge as its going in, so the charger is fighting against you.
I've been charging off usb at work and struggled to gain 20% in 8 hours because of my usage pattern.
Click to expand...
Click to collapse
I was testing how long it takes to charge, so I didn't even touch the phone while it was charging.
JLneonhug said:
Theoretical time for charge is about 1:30 hrs. Reality, start and ending charge should slow down (for safety), heat slow downs, plus usage of phone as spoken above I guess it could take up to 3 hrs.
It's not great to do a full charge regularly. I tend to keep mine between 40-90% for maximum life cycle of battery.
Perhaps try resetting battery stats? Try a different 2a charger?
Sent from my GT-N7105 using Tapatalk 2
Click to expand...
Click to collapse
1:30 hours? Could you kindly explain how?
And I've wiped my device fully, also reseted battery stats.
One thing I'd to next is, I'll turn the device off and see how long it takes then.
Sent from my GT-N7100

jujuburi said:
Guys this issue is annoying me. My device is having some charging problems. I have measured the charging time for last two charges, and its taking 3 hours 40 mins for 10% to 100%, and 4 hours from 0% to 100%. Where most people are saying it takes around 3 hours, from a complete drain to full 100%.
So have any of you guys ever measured the actual time of charging? A lots of comments I see say around this or around that, or from 2 hours to 3 hours, well that's not what I need. If anyone has measured the time then please post here. I'm thinking about going to SC, but I don't wanna go there until I'm totally sure that there is a problem.
PS: I'm talking about Stock charger, (2A) plugged in AC power source. And device should be on, not off.
Btw- There should be a technical answer to this, the charging current is 2A and the battery is 3100 mAh, so how could I do the math?
Thanks in advance.
Sent from my GT-N7100
Click to expand...
Click to collapse
Mine takes 2.5 hrs to charge from 10% to 100% with phone on using stock wall charger and cable (when charged continuosly with no activity on phone). It charged from 1% to 96% in 2.5 hrs with phone switched off (switched it on exactly after 2.5 hrs to check). But, usually i avoid charging my phones to full 100% (also always charge it when at 10%).

Dpk1 said:
Mine takes 2.5 hrs to charge from 10% to 100% with phone on using stock wall charger and cable (when charged continuosly with no activity on phone). It charged from 1% to 96% in 2.5 hrs with phone switched off (switched it on exactly after 2.5 hrs to check). But, usually i avoid charging my phones to full 100% (also always charge it when at 10%).
Click to expand...
Click to collapse
Try with another note 2 charger first. The thing with these chargers is they will behave erratically when there is voltage fluctuation or if you use in a train and other cases. So go to SC and tell them its taking almost double time for me to get charged. They will replace the charger as well the cable. My cousin has the same problem with s3. He got it replaced by the SC.
Sent from my GT-N7100 using Tapatalk 2

Thanks Chaitanya. But the SC guys are so stupid here. First thing they do always are to take the phone in their custody and deal with it badly. Still I will ask them to replace the charger and check.

Some of us have noted that if you let the screen time out and not manually shut screen off after connecting the charger. ..The charging is faster. . If you manually shut off the screen. .. The charging is slow.... It is weird but don't know why. .it definitely is happening
handwritten from my note 2 (N7100)

Mine takes about 3 hours to charge fully from 15 %
Sent from my GT-N7100 using xda app-developers app

Op: I said theoretical it will take 1:30.. Realistically it should slow down during stages due to safety reasons.
Mine took probably 3 hours the other day I ran it down, but this was combination of using 1a and 2a charger.
I think on the note 2 it doesn't ramp up power till it gets to 20-30%. Took a while to get there from 2%. If only battery widget was working on the note 2..then I could confirm.
Sent from my GT-N7105 using Tapatalk 2

Are you using the charger that came with Note2 ? I was using my old blackberry charger and it took for ever to charge the phone.
The output of the Note2's charger is more than twice the output of my blackberry charger.

^ Yeah, of course I am using the stock charger that came with Note 2! I'd not create this topic if I had used another charger.
Anyway, after a long week in Service Center now my phone is back, they provided me a new charging adapter (not the cable) and I was very happy because I thought everything will be smooth and like before but guess what? No improvement. It's still taking long! I just measured it for 30 mins exactly, it went from 70 to 83%, i.e 13%, where it should be 24% as stated in this thread,
http://forum.xda-developers.com/showpost.php?p=33585646&postcount=31
Now I am really angry. I will try with another Note 2 USB cable first, if that fails, there is something wrong with the device, I guess?

jujuburi said:
^ Yeah, of course I am using the stock charger that came with Note 2! I'd not create this topic if I had used another charger.
Anyway, after a long week in Service Center now my phone is back, they provided me a new charging adapter (not the cable) and I was very happy because I thought everything will be smooth and like before but guess what? No improvement. It's still taking long! I just measured it for 30 mins exactly, it went from 70 to 83%, i.e 13%, where it should be 24% as stated in this thread,
http://forum.xda-developers.com/showpost.php?p=33585646&postcount=31
Now I am really angry. I will try with another Note 2 USB cable first, if that fails, there is something wrong with the device, I guess?
Click to expand...
Click to collapse
I really don't think it's your device or your battery for that matter. I have a question as well (sorry to hijack...). When you were charging it for 30 mins, were you using it? Was the screen off or the phone totally turned off? I noticed one night that I had an email notification and the phone did not charge because the notification LED was on all night while I slept and it was plugged into my 1A Samsung charger from my original Note. I have yet to check if the charging disconnects itself if the LED comes on. I don't even know if the phone charges at all if the screen is on either. Can anyone confirm? I guess I'll try it out tonight! The battery last forever I got to admit, perhaps most of the time I'm slow charging it at 1A max with the original Note's charger? I guess it does the battery some good
Thanks a bunch!

No pal I am not using the device while charging (because I am testing and measuring the times, that's why I restrain myself from touching it), and it's on, not off.
Anyway, yesterday I went to a friend's home and found he has a Samsung ACE and has same USB port like Note's and I was carrying the charging adapter, so I took that Ace's cable and plugged in to my Note's adapter and let it charge for an hour, and I was amazed and happy to see that it increased 38% in 60 mins. Well this tells me that the USB cable of my Note 2 is gone to heaven.
And oh, if you charge and use the device at the same time it will charge pretty fast even then too. I can confirm this when I first got the device, always was using it and charging, and I was surprised to even then how fast it was charging.

I (and many other users) have similar problems with Galaxy S3. I've made an app that shows the actual charging current: http://forum.xda-developers.com/showthread.php?t=2076078
I'm not sure if it works on the Note 2, but it is worth a try.
Please check if your device is charging at the optimal charging current (I think it is 2000mA for the Note 2 charger, instead of 1000mA as pointed in the SGS3 thread).

[Q] samsung galaxy s3 charging problem

Hi,
Ive been having problems while charging my phone. Usually i charge my phone from 11 pm to 7 am and sometimes when i wake up in the morning the battery light is green and it reads as 100% battery charge but the moment i disconnect the wire it instantly drops to 30-50%. Is anyone else having these issues?

Are you stock?
I have not had this problem and charge pretty much same as you. I am stock rooted with a few apps disabled and only had the phone since October.

Try this app
Also I'm pretty sure you shouldn't let it charge for so long, it will hinder you battery life in the long run. At least that's what I have read.

lt1camaro said:
Hi,
Ive been having problems while charging my phone. Usually i charge my phone from 11 pm to 7 am and sometimes when i wake up in the morning the battery light is green and it reads as 100% battery charge but the moment i disconnect the wire it instantly drops to 30-50%. Is anyone else having these issues?
Click to expand...
Click to collapse
Option 1 : Clear battery stats
Option 2 : Get a new battery and 24 hour charge
Option 3 : Let the battery DIE, drop it in the freezer for a few hours, then 12 - 24 hour charge it again. Doing this though MAY (not always does) cause the water indicator to trip. Easiest solution I found for that was I vacuum sealed my battery THEN dropped it in the freezer. No air, no moisture, no trip.

kirkgbr said:
Are you stock?
I have not had this problem and charge pretty much same as you. I am stock rooted with a few apps disabled and only had the phone since October.
Click to expand...
Click to collapse
Yes i am running stock

jgaf said:
Try this app
Also I'm pretty sure you shouldn't let it charge for so long, it will hinder you battery life in the long run. At least that's what I have read.
Click to expand...
Click to collapse
I would also recommend trying this app. I tried it out a few days ago and it does seem to help out quite a bit.

I find mine drops instantly to 99%. Even sometimes when I'm at 74% and if I don't use it at all, I will check back and it goes up to 78% :-/

[Q] Tab S 8.4 Charging Problem

Hi guys, I have being experiencing some glitches in my tab S battery percentage.
I am using Galaxy Tab S 8.4 for about 5 months now. Recently I start to notice some inaccuracy on the battery performance. Say I run out of charge completely to the point that the tablet switches itself off, upon plugging the adapter to recharge I always notice to start charging at around 30 percent not zero (i. e., the battery percent notification jumps to 30 percent at a time upon plugging the charger). Please can someone explain to me the problem going on with the tablet?

Sir,
Please wait until mods will move this thread to the device specific forum for more relevant answers.
Stand by
Good luck

Solution for battery drain on Tab S 8.4

Hi everyone.
Just to write a solution for the commonly problem on the battery of this tablet; I had the problem that battery ran out almost on 1 or 2 hours! of use after it turned off I turned on again and the gauge showed for example 30% or some cases 40% of battery I was crazy about that and had to do some research; tried to bring the tablet to warranty but they did not could help me (I don't know why) after that I read there were more users having this problem; some of them suggested to bring the tablet to a repair center or open the tablet and do some technical reparation; the solution is pretty simple that it seems to me; my solution was to open the tablet with a spudger (I don't have one so I made one by sanding a piece of plastic) after that just unplugged the battery conector and reconnected it again; rebooted if recovery mode and erased batterystats.bin, turned off and charged until 100%.
At this point I have been using the tablet by 3 days and the gauge seems to show a more precise battery percentage.

Anybody that is having battery problem, and have checked that a app is not causing the battery drain, should try the battery calibration method below, before opening their tab
Try apps like watchdog or an wakelock checker app, also any apps like alarms and weather check apps or any apps that sync the tab can keep the tab from going to sleep.
On my tab s 10.5 i only charge to 70% and never unless i am doing a calibrate drop below 20%, I use my tab for video, ebook and internet.
I use an app like Gsam to sound an alarm at 20% and 70% when charging, and i dont charge to 100% as it can cause cumulative damage to the battery, check the link below for more info on how to care for lithium based battery`s
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
John.
Below are a few screenshots from my tab s 10.5 , It has been running continuously for 142d without restart and i have a battery life of 3d21h according to Gsam app.
http://i.imgur.com/lHnGxbE.png
http://i.imgur.com/lvwv9Zm.png
http://i.imgur.com/dxfYCgJ.png
You can calibrate the battery like this before you decide to buy a new one
Fully charge the battery with the phone on and when the phone is fully charged, unplug the charger and turn it off.
When your phone is off, plug it into the charger and let it charge to 100% again. The green LED light will indicate when this is don
Next unplug the charger, turn on your phone and set the option to ensure that your screen doesn’t turn off, if you have this option. Then reconnect to the charger and wait for it to charge again to 100%.
Once charged to 100%, unplug the charger again and do not charge until the smartphone turns itself off after reaching a 0% battery level. Once off, fully charge it again and it should work properly. The screen setting can put back to normal again (meaning turn off after a certain amount of time).
phones with oled displays should not show static images for a long time as it can cause burn-in
From AndroidPit
Click to expand...
Click to collapse

Tinderbox (UK) said:
Anybody that is having battery problem, and have checked that a app is not causing the battery drain, should try the battery calibration method below, before opening their tab
Click to expand...
Click to collapse
I might have to give this a try. Like my battery has no problems with its connectors or anything since I have never had that problem. Recently, every time I charge my device, when it charges up to 97%, it immediately jumps to 100%. Rebooting still shows 100%. So when I turn off the device and charge it while it's off, it shows its at 98%. So I know it's an calibration problem. This only happens when charging up to 97%. So I might need to recalibrate again.
-DUHA

You should not discharge to 0% too often, as it can causes curative damage and the battery could actually fail, you would not want that to happen if you are out of warranty, I rarely discharge below 20%, a couple of % inaccuracy is not a problem really.
John.

Tinderbox (UK) said:
You should not discharge to 0% too often, as it can causes curative damage and the battery could actually fail, you would not want that to happen if you are out of warranty, I rarely discharge below 20%, a couple of % inaccuracy is not a problem really.
John.
Click to expand...
Click to collapse
I hardly ever discharge to 0%, I usually charge it when it tells me my battery is low (20-15%). Well, I bought this tablet in July so I have reached probably 300+ charge cycles. I read some threads regarding battery skiping and it happens when either it's uncalibrated, or battery is slowly going bad, and something else I forget. But thanks for the tips on the battery stuff! I never knew charing and discharging fully could do such a thing!
-DUHA

I bought my device from Kuwait so it's firmware belong to united Arab of imarats.
At the beginning , I faced some issues with my device such as. After about 3 weeks I found the the battery stay only for 10 minutes even if it charged to 100%
I had to put my device in charge all the time so I can use it.
I send it to repair center and told them that I need to replace my battery.
After one day they call me and told me that it just asoftware problem and we solve it.
I got it from them use it for just 3 days and found anew problem that the home,back and multitask buttons dosen't work very well . That I need to but it on it's back or use the desktop cover to make it work.
In that point I tried another country firmware with kitkat 4.4.2 and that dosent solve anything
And when I found that the lolipop came to galaxy tab s with France and Canada and sanghfore , I installed it
I found that when I connect the wall charger , the device immediately turn off and give me the sign of battery with out any process in charging and dosent want to turn on.
And when the device work , it give me ablack screen when I shake it between my hand or but it on it's back (such like ablack screen flashing)
I don't know what to do.

Battery always showing 0% and shutting down when unplugged!

One fine morning my Note 10.1 2014 battery started showing as 0% and will not 'charge' (i.e., percentage will not rise). As a result, the tablet has to stay plugged-in always to use it (just like a desktop computer). The moment it is unplugged, it shuts down in 1 or 2 seconds. Tried different chargers/cables/flex cables/new battery/uninstalling/reinstalling/warming...& what not. But nothing solves the issue. I came to know that the battery is actually holding/taking in charge which is evident from the fact that the tablet runs without being plugged-in in the recovery/TWRP mode! It seems just that the android OS is not recognizing the charging. Any help would be appreciated. Thank you!

Is the battery really good? The boot menu uses a lot less current than normal boot up operation.
Otherwise you're looking at a possible mobo failure. If it has a charger pcb it could be that.
A Samsung Experience center at a Best Buy might be able to sort it out for you.

blackhawk said:
Is the battery really good? The boot menu uses a lot less current than normal boot up operation.
Otherwise you're looking at a possible mobo failure. If it has a charger pcb it could be that.
A Samsung Experience center at a Best Buy might be able to sort it out for you.
Click to expand...
Click to collapse
It is not the battery, I am pretty sure! As for the other possible causes suggested, it seems Samsung considers the product too 'old' now to look into/offer any service/parts replacement. Anyway, thanks for the quick reply!

I got the same experience. Recently installed LOS14.1 on my Samsung 2 7.0 and battery just drained and inspite charging it overnight never recovered. I think it's really the LOS 14.1. Now I cant even boot it up anymore.

tom.cruiser said:
I got the same experience. Recently installed LOS14.1 on my Samsung 2 7.0 and battery just drained and inspite charging it overnight never recovered. I think it's really the LOS 14.1. Now I cant even boot it up anymore.
Click to expand...
Click to collapse
Please do post, if you find a solution!

I strongly doubt that LOS14.1 (lineage-14.1-20210320-UNOFFICIAL-lt03lte) is the culprit as my old P605 still works with the unchanged battery.
Once charged it lasts for quite some days (usage 0.5h/day) without problems.
It's always in flight mode and mostly WLAN is shut off.

It's not that cuz of an OS it's the old battery problem....
Same thing happens to one of my cellhphones.
I charrge it to 100 % while it's turned OFF then tomorrow I turned it on and battery is at 1 %, 0 % and shuts off.
It's just old Li-Ion battery which needs replacement.

After having replaced the battery with a new one with about 50% charge the discharged P605 would only recharge to the level of the original charge. It returned to normal behaviour after charging once with the original 5v/2A charger and the original cable with the second GND contact missing. If the latter did the trick, with most cables u can't tell whether the contact is wired to GND or not.
But in the days of miniUSB, the second GND was sometimes used to put the device in charge or pc connection mode, by swapping cables.