Develop Bugs

[Q] Not sure if I have found a battery drain bug or what

Something I've discovered recently, and I am not sure I can explain it properly, but here goes...
I am running SRF 1.1.1, I don't believe this is the cause of the problem, but probably something that should be stated.
So running SRF1.1.1, I usually get wonderful battery life. I typically use an external charger and swap out batteries when they get to around 10-15%. This has worked well for me.. For the past few days I got lazy, and just plugged my phone in and left it on my desk to charge, no problem. When the battery is fully charged and I unplug it from the charger, I noticed it was rapidly draining.... I am aware that often when charging via the phone the battery immediately drops to 96% when removed from the charger. So this is normal, but I've noticed that after unplugging from the charger I lose about 10% per hour, when normally it may be 1-2% depending on usage.
To remedy this problem, rebooting seems to fix this issue. I have also had success with the airplane mode toogle. I don't see any odd usages showing up in spare parts, but is there any other way I can test this theory?
Thanks!!
Edit: Wanted to add, that this only seems to happen when using the charger cable with the phone. Swapping batteries does not seem to produce this issue. It is only when the phone is removed from the charger.

I haven't calibrated by battery lately and thats exactly what mine does too, I would stick to the external charger because our phones charge excruciatingly slow unless off. Try calibrating by charging to full while on then turn it off and let it charge more and repeat that a couple times then boot into cwm go to advanced and clear batt stats

Is there an advantage to calibrating a battery if it is not being charged in the phone?

This is the TWS bug mixed with no battery calibration.

socos25 said:
Something I've discovered recently, and I am not sure I can explain it properly, but here goes...
I am running SRF 1.1.1, I don't believe this is the cause of the problem, but probably something that should be stated.
So running SRF1.1.1, I usually get wonderful battery life. I typically use an external charger and swap out batteries when they get to around 10-15%. This has worked well for me.. For the past few days I got lazy, and just plugged my phone in and left it on my desk to charge, no problem. When the battery is fully charged and I unplug it from the charger, I noticed it was rapidly draining.... I am aware that often when charging via the phone the battery immediately drops to 96% when removed from the charger. So this is normal, but I've noticed that after unplugging from the charger I lose about 10% per hour, when normally it may be 1-2% depending on usage.
To remedy this problem, rebooting seems to fix this issue. I have also had success with the airplane mode toogle. I don't see any odd usages showing up in spare parts, but is there any other way I can test this theory?
Thanks!!
Edit: Wanted to add, that this only seems to happen when using the charger cable with the phone. Swapping batteries does not seem to produce this issue. It is only when the phone is removed from the charger.
Click to expand...
Click to collapse
similar to what i have been experiencing. i enjoyed great battery life with srf 1.1.0. have a 3500mAh battery that i used to get about 48 hours out of, but now it is averaging around 25-30. i do not have anything but the stock battery to swap with, so i do put it on the charger nightly now. i was planning to recalibrate the battery tonight to see if that cleared things up.
what would be a way to fix the tws bug?

I have noticed this too. It seems to srf seems to not like my extended battery. I am lucky I get a day out of it. I some times will plug it into one of my work computers just to bring the charge up a little and it starts flashing red and discharging this is only on my extended battery not the 2 stock ones I have. I have even tried different kernals to see if that was issue it isn't.
Sent from my lean mean drunken machine useing XDA Premium and a 12 pack of Sam Lager

in looking at battery usage in >settings>about phone>battery use>cell standby i see usually 0-5% tws.
one thing i have noticed, though have not tested is that the screen appears brighter, even at the minimum setting than what i remember from srf 1.1.0

[Q] Battery worn out?

Hello,
My desire, after:
an inability to restore nandroid backup
a possible corrupted sd card
a usb brick and inability to mount some nand partitions
and finally succeeding in fixing it, now using/running:
2.29.405.5 stock rooted rom
a new sd card (samsung 16GB class 6)
clockworkmod 2.5.0.7
s-off
seems that has battery issues. When it reaches below 30%, it drains a lot faster. In example few minutes ago, the battery was below 30% level and after sending a couple of sms messages the phone, without the "Connect the charger" indication shut down. Not even the battery icon was red.
What should I do?
After flashing the above ROM I ran an app called battery calibration (could this be the culprit?).
I haven't experienced such problems before the whole mess mentioned above.
Thank you for your time.

Well, it seems to me like a "classic" battery meter calibration issue.
TVTV said:
In order to calibrate the battery meter - FYI the battery itself cannot be calibrated, as Li-Ion batteries have a very low memory compared to old Ni-Cd etc. batteries - you have to go through the following procedure:
1) charge the battery to 100%;
2) let the battery discharge until the phone shuts itself down;
3) plug the wall charger into the phone, boot the phone up then charge the battery to 100% without interruptions.
If the above procedure does not yield the expected results, you can try fully charging the phone (LED showing green) with it completely turned off (after completely draining it). Again, the charging procedure should not be interrupted.
Source: personal experience - had to do this twice after installing new ROMs, as the phone was shutting down at ~14% (working like a charm now).
Regarding the matter of battery wear because of complete discharges, Li-Ion batteries do indeed have a lower cycle count than old-school batteries, but the standard charge/discharge number a Li-Ion battery can take is ~350, so you can't damage the battery pack by doing a full cycle per month (required to keep the battery meter accurate).
Good luck!
Click to expand...
Click to collapse

Did this work you mate? I have the same issue with my year old batter now... the phone shuts down @ 40% without any warning... and when I charge it, it starts from 0% and as soon as it hits the 58% mark, it jumps to 100% by itself... and i cant seem to figure out what the hell could I do to fix it... I tried calibrating the battery using the awesome method described here http://forum.cyanogenmod.com/topic/11823-battery-calibration-thread 3 times and nothing changed...

bump bump.. i really need help on this guys... :/
Sent from the infinity and beyond...

Weird that after calibration you still get that kind of issues, does this only happen on your current ROM? I have the latest CM in my desire and everything works just fine... Maybe try another ROM if calibration doesn't work to see if it's a hardware or software issue

i actually had issues with MIUI first.. the phone randomly shut down by itself but when i turned it back on, it was perfect... then i switched back to Oxygen and while everything was fine, suddenly one day the phone died at 40% :S and from that day on the phone charges to 58% and then instantly jumps to 100%... and as soon as it gets to 40% it shuts down itself... i guess i need a new battery but i wanted to see wether i can fix this one somehow so i can use it till the new one arrives...
Sent from the infinity and beyond...

same problem
i have the same problem
my phone turns off at 20% battery
calibration does not help....
and battery is not bad - it works fine
i'm sure its the problem with calibration

kshitijgandhi said:
i have the same problem
my phone turns off at 20% battery
calibration does not help....
and battery is not bad - it works fine
i'm sure its the problem with calibration
Click to expand...
Click to collapse
phone turning off at 20% is fine mate because thats the battery guards against any damage
most of the phones ( smart phones) switch off at 20% as going lower can damage the System .

It shouldnt normally..It's supposed to work fine upto 5%

Have a look at this, it worked for me (but you need a compatible kernel, most AOSP are so)
http://forum.xda-developers.com/showthread.php?t=765609

[Q]Recharge's time

Is it normal if note 2 cost you 5-6 hours to full recharge 5-100%? it's ~3 hours before. And after 5 months it take too long for recharging.
Im used Alliance v3.1 - perseus kernel 3.0.36. Wifi on all the time. 3G not often. Note2 sleep when recharging (untouched).

If you still use the original cable, try to change to different cable. Check your voltage using galaxy charging current (root).
Sent from my GT-N7100 using xda app-developers app

Im noticed the brightness of a red led sometime too "dark" and sometime very bright. Is it a signal?

Try to change the charging cable. because the normal charging with original cable and charger is 1and half hour from zero to full.
Sent from my GT-N7100 using Tapatalk 4 Beta

How old is your battery? When I mean "old", I mean how many full charge/discharge cycles has it been through? Do you let your battery go below 5% often? Is it an original Samsung battery?
As batteries get older, they may take a longer time to reach full charge. However, to truly troubleshoot the cause of the problem you need to:
a) have at least another cable to compare with
b) Measure the current that the device is getting during the recharge. There is software that can give you this info.
Without these questions answered and these two tools, it will be difficult to accurately troubleshoot the cause of your problem. Once you are able to provide some more info, we'll be glad to help you.

Alexei Volkoff said:
How old is your battery? When I mean "old", I mean how many full charge/discharge cycles has it been through? Do you let your battery go below 5% often? Is it an original Samsung battery?
As batteries get older, they may take a longer time to reach full charge. However, to truly troubleshoot the cause of the problem you need to:
a) have at least another cable to compare with
b) Measure the current that the device is getting during the recharge. There is software that can give you this info.
Without these questions answered and these two tools, it will be difficult to accurately troubleshoot the cause of your problem. Once you are able to provide some more info, we'll be glad to help you.
Click to expand...
Click to collapse
1/ Battery is stock and original. 6 months. ~ 130 times full charrge. 30-40 times not full charge (60%-80% then discharged). <20 times battery go below 5%.
2/ Used Battery HD to get info's battery: with AC: 4:19 hours. with USB: 6:29 hours .
3/ Try with another cable. And the red led is very bright. And it seem tobe decreased the charging time.
I forgot my AC at my work place, then i only have choice to use USB. aww

dproe said:
1/ Battery is stock and original. 6 months. ~ 130 times full charrge. 30-40 times not full charge (60%-80% then discharged). <20 times battery go below 5%.
2/ Used Battery HD to get info's battery: with AC: 4:19 hours. with USB: 6:29 hours .
3/ Try with another cable. And the red led is very bright. And it seem tobe decreased the charging time.
I forgot my AC at my work place, then i only have choice to use USB. aww
Click to expand...
Click to collapse
OK. Lets start troubleshooting your problem but first some basics to help you better understand the issue and maintain your battery in good shape and maximize its longevity:
Full battery discharges - until power shutdown (0%) - or discharges that drain the battery below 3% must be avoided because they stress the battery and cause premature wear. It is better to perform partial discharges and frequent charges instead of performing a full discharge followed by a full charge. I never let my battery drop below 5%.
A discharge/charge cycle consist of using all of the battery charge (100%) but not necessarily at once. For example, you can use half its capacity then fully charge it. This is not a discharge cycle, it is only half of a cycle. Only if you do this twice does it counts as a single discharge cycle (50%+50% = 100%). Same goes if you use 30% then charge, then use 20% then charge, then use 25% then charge, then use another 25% then charge. You charged 4 times but you only did one cycle (30%+20%+25%+25%=100%). So it may take several charges/discharges until a full discharge cycle is completed.
Charging speed depends on the amount of current the battery is fed. The Note 2 can be charged with a max. current of 2A (2 Amps) or 2000 mA (2000 milliamps). If you check the stock charger's specifications, you'll see that it's output is 2A. However, not all USB cables can conduct this amount of current. So, even if the charger is outputting 2A the battery may be being fed less because the cable can't handle 2A. Hence, the importance of the cable. One way to check this, is by installing a software that can read the amount of current that is being fed to the device. I personally use "Galaxy Charging". It is free and serves its purpose.
Also, charging speed is not linear. You probably have noticed that when you charge a totally drained battery, the first 20% are charged pretty quickly and the last 10% are rather slow.
Last, if you charge your device through a regular USB port from your computer or another device, it is perfectly normal that it charges much slower since the original USB specification defines an output current of 0,5A. Even the so-called "charging ports" from today's laptop don't output 2A (not any that I know, at least). The fact is that even most wall USB chargers don't output 2A and even some of the ones that claim they do, actually don't.
If you are having trouble understanding any of these theoretical facts about charging, please let me know and I'll try to explain them better. I don't know if I got through to you.
So, let's see what is wrong.
1) Download "Galaxy Charging" from the Play Store. There may be other, but it seems this one is popular among XDA members, so it is easier to compare figures.
2) Take the cable with which you are charging now, the stock cable and another USB cable.
3) Make sure the battery is more than 20% charged and less than 80%.
4) Shut down all apps, including the ones that are running in the background. Take note of the initial battery level (%). Charge the battery using your regular cable. Run "Galaxy Charging", check the "Now" input current and take note of it. Let it charge for a while (no need to fully charge it). If you want to, you can also take note of the charging time. DON'T USE YOUR PHONE while charging!!! If you do, you won't be able to truly compare the measurements.
5) Take note of the "Maximum", "Now" and "Avg" figures in "Galaxy Charging", unplug the charger and take note of the final battery level (%).
6) Use you cellphone until the battery level drops to the initial battery level at the begging of the charging procedure. Repeat steps 4) and 5) with the other cables, not forgetting to take notes of the currents measured by the software.
This may sound like a pain in the a$$ but unless a procedure is repeatable, you cannot draw any serious conclusions. The initial and final battery levels must be the same because, as I said, charging is not linear. So, the range at which this experiment is conducted must also be the same. Also, charging times can be affected by variables like: battery age, room temperature, mains current variations, how low the battery level is and so on. So, other people's charging times are a rough guideline only. Not to mention the people who use their phones while charging or keep a zillion apps running in the background and them post their times on the forums like if they meant something.
Let me know your findings. I'm sure you will find something of interest if you take the time and trouble to follow these steps and maybe we can all learn something in the process. Good luck.

Thanks mate! This is very helpul.
You saved more life (battery) :good:

Check out this thread: http://forum.xda-developers.com/showthread.php?t=2360806

Use Peresus and GCC say: 466-466-466. same with USB connect. So i try to flash other kernel, Redpill. And now GCC say: 600-1689-600. Cable is original.
Then i try to reflash again with peresus and GCC say: 800-1689-800 (with or without ignore unstable power). Try reboot and GCC say: 600-1689-600. Cable still original.
Un-plug the cable and plug it in. GCC say 1800-1689-1800.
Well, maybe the kernel is normnal and cable has a problem. I'll try another cable soon. Thanks everyone. :good:

dproe said:
Use Peresus and GCC say: 466-466-466. same with USB connect. So i try to flash other kernel, Redpill. And now GCC say: 600-1689-600. Cable is original.
Then i try to reflash again with peresus and GCC say: 800-1689-800 (with or without ignore unstable power). Try reboot and GCC say: 600-1689-600. Cable still original.
Un-plug the cable and plug it in. GCC say 1800-1689-1800.
Well, maybe the kernel is normnal and cable has a problem. I'll try another cable soon. Thanks everyone. :good:
Click to expand...
Click to collapse
Interesting findings. It can also be a bad contact between the cable's plug and the phone's USB port. I had a problem once with a cable and found out that the problem was the metal end of the USB plug itself that wasn't making appropriate contact with the USB port. A small pliers and a bit of pressure on the right spot solved the problem.

longer time to recharge after rooting and updating to customized rom
Alexei Volkoff said:
OK. Lets start troubleshooting your problem but first some basics to help you better understand the issue and maintain your battery in good shape and maximize its longevity:
Full battery discharges - until power shutdown (0%) - or discharges that drain the battery below 3% must be avoided because they stress the battery and cause premature wear. It is better to perform partial discharges and frequent charges instead of performing a full discharge followed by a full charge. I never let my battery drop below 5%.
A discharge/charge cycle consist of using all of the battery charge (100%) but not necessarily at once. For example, you can use half its capacity then fully charge it. This is not a discharge cycle, it is only half of a cycle. Only if you do this twice does it counts as a single discharge cycle (50%+50% = 100%). Same goes if you use 30% then charge, then use 20% then charge, then use 25% then charge, then use another 25% then charge. You charged 4 times but you only did one cycle (30%+20%+25%+25%=100%). So it may take several charges/discharges until a full discharge cycle is completed.
Charging speed depends on the amount of current the battery is fed. The Note 2 can be charged with a max. current of 2A (2 Amps) or 2000 mA (2000 milliamps). If you check the stock charger's specifications, you'll see that it's output is 2A. However, not all USB cables can conduct this amount of current. So, even if the charger is outputting 2A the battery may be being fed less because the cable can't handle 2A. Hence, the importance of the cable. One way to check this, is by installing a software that can read the amount of current that is being fed to the device. I personally use "Galaxy Charging". It is free and serves its purpose.
Also, charging speed is not linear. You probably have noticed that when you charge a totally drained battery, the first 20% are charged pretty quickly and the last 10% are rather slow.
Last, if you charge your device through a regular USB port from your computer or another device, it is perfectly normal that it charges much slower since the original USB specification defines an output current of 0,5A. Even the so-called "charging ports" from today's laptop don't output 2A (not any that I know, at least). The fact is that even most wall USB chargers don't output 2A and even some of the ones that claim they do, actually don't.
If you are having trouble understanding any of these theoretical facts about charging, please let me know and I'll try to explain them better. I don't know if I got through to you.
So, let's see what is wrong.
1) Download "Galaxy Charging" from the Play Store. There may be other, but it seems this one is popular among XDA members, so it is easier to compare figures.
2) Take the cable with which you are charging now, the stock cable and another USB cable.
3) Make sure the battery is more than 20% charged and less than 80%.
4) Shut down all apps, including the ones that are running in the background. Take note of the initial battery level (%). Charge the battery using your regular cable. Run "Galaxy Charging", check the "Now" input current and take note of it. Let it charge for a while (no need to fully charge it). If you want to, you can also take note of the charging time. DON'T USE YOUR PHONE while charging!!! If you do, you won't be able to truly compare the measurements.
5) Take note of the "Maximum", "Now" and "Avg" figures in "Galaxy Charging", unplug the charger and take note of the final battery level (%).
6) Use you cellphone until the battery level drops to the initial battery level at the begging of the charging procedure. Repeat steps 4) and 5) with the other cables, not forgetting to take notes of the currents measured by the software.
This may sound like a pain in the a$$ but unless a procedure is repeatable, you cannot draw any serious conclusions. The initial and final battery levels must be the same because, as I said, charging is not linear. So, the range at which this experiment is conducted must also be the same. Also, charging times can be affected by variables like: battery age, room temperature, mains current variations, how low the battery level is and so on. So, other people's charging times are a rough guideline only. Not to mention the people who use their phones while charging or keep a zillion apps running in the background and them post their times on the forums like if they meant something.
Let me know your findings. I'm sure you will find something of interest if you take the time and trouble to follow these steps and maybe we can all learn something in the process. Good luck.
Click to expand...
Click to collapse
Hello.
Would you help me to resolve this problem:-
I've just got new update for my Note 2 N7100 today (31.12.2013 as at my local time) with the Omni ROM Kit Kat 4.4.2 and flashed it successfully. The problem is that since I did customize my Note 2 with the said ROM, I could see the battery drained a bit faster even Kit Kat used less RAM on certain running apps (as I believe this would help me conserving more battery life) and since the latest update, I found that the recharging time took a longer time to even reach 50%, if compared with before rooting with the said ROM (real scenario: recharging battery as usual via original recharger, but after almost 2 hours (started at about 7.00 pm till about 9.00 pm), the battery itself just clocking not even 40% recharged). No idea what is the real problem, could be so technical to me as I could not by myself figure out what happened, even though looks like the ROM works okay and stable to my Note 2.
So, any advice?
TQ!

[Q] Battery and Charging Issues

Hello everyone. One of the problems that i am having is the charging that usually takes up 6 hours to fully charge from 10-20%. Also i thing the battery is draining faster than it should. These problems have been there since the beginning that i bought the tablet( lg V510). I have tried charging with 3 different charges and outlets with the same result... Is there anything that i can do, or should i just try the warranty?

Have you tried another charger cable...

Nitro-Racer* said:
Hello everyone. One of the problems that i am having is the charging that usually takes up 6 hours to fully charge from 10-20%. Also i thing the battery is draining faster than it should. These problems have been there since the beginning that i bought the tablet( lg V510). I have tried charging with 3 different charges and outlets with the same result... Is there anything that i can do, or should i just try the warranty?
Click to expand...
Click to collapse
For the battery drain and other issues, root your device and install the Xposed Framework, then Greenify and AppOpps. For some other tweaks, download the sleekai kernel, and you should find your battery life much improved.
For charging, yes, it takes a while, but it sounds like you may be using a different charger than that which came with the device. Also, I have enabled Fast Charge in the sleekai kernel as an option for you to explore.

I have tried other cables too with no difference.... Could a defective battery be causing this slow charging?
Also enabling fast charging meaning you are charging in how much time?
Thanks for the help

Strange charging port dilemma discharging While charging

OK I'm using a old s4 temporarily ,normally I'd be on a s6 like I was .
This phone Initially assumed had a bad battery so I replaced it cause its a old phone and batt...
I've seen this before and never really narrowed it down to bad USB cable bad batt or something internal with phone..
Wether im on a rom or stock rooted or stock shipped no root It's like the phone wants to fight charging while discharging ,all while in use and turned on and charging .
The charge % gained is so slow vs any other s4 I've had and defiantly not like a s5 or s6
I may get 2% gain every 5 min while using a Samsung fast charger 2amp.
A lot of times I can see it discharge while charging ?
I tried 2 new batteries wiped cache dalvic multiple times
I know the charging port is bad for a fact because USB port has to be held in certain spot angle to charge...
Although logic would say if you see it charging and you see the charging BOLT? Regardless if its a worn port can a charging port that's bad but still charges charge the phone slowly cause a discharge or faulty slow Charge even when your 100% sure u see it charging ?
I have the new port coming today .
And even after and when I've managed to get 100% charge on a new battery stock rom I'm getting a fast discharge rate like 1% every 3 minutes drain.
Any known fixes ? Kernel fixes ,deep sleep issue? Volte causing the drain like it did on the s6?
Sent from my SGH-M919N using XDA Free mobile app