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!
Related
Now I hesitated to post this until I was fairly sure.
So after about 8 trials over a few weeks and a 100% success rate, I think I can safely say this.
There is a way to quick charge your phone in 10~20 minutes from 0~10% to 75~90%.
I've a samsung vibrant, stock charger, stock battery, and nextgenv1.
(Not tried on other devices yet)
The trick is simple, when ur phones relatively low on power...
1) turn it off
2) plug into charger
3) wait at least 5 minutes
4) while still plugged in and charging, turn phone on
It should then be charged (not 100%, but 75~90% is usually what I get)
I've yet to test the time you charge vs final output charge, or the effects of starting at different charges.
Weird right? After asking my tech, physics, and biology teacher, the idea is that when the phone charges it fills in each battery cell with power, so while its doing the filling and you turn the phone on, all the cells open up so that a flush of energy can come in. Obviously this doesn't sound too good for the battery, so use this at your own peril. I'm just saying its been working every time, and no problems have come up thus far.
I dont go on here often so if this is already common knowledge, let me know and I'll delete this thread.
If not, try it out and see if it works!
Most phones come with single cell batteries.
The phone has a capacity/voltage map which it uses to work out how much juice is left in the cell, ie at xV it's y% full.
The battery is charged using approx 4.5V, so I'd imagine when you turn your phone on it's getting a false reading of the battery's voltage and that's why it's showing as charged more than it actually is.
use at your own peril indeed--theres gotta be some inaccuracies there
xaccers said:
Most phones come with single cell batteries.
The phone has a capacity/voltage map which it uses to work out how much juice is left in the cell, ie at xV it's y% full.
The battery is charged using approx 4.5V, so I'd imagine when you turn your phone on it's getting a false reading of the battery's voltage and that's why it's showing as charged more than it actually is.
Click to expand...
Click to collapse
Yup, my thoughts exactly. But as it turns out, it lasts for the same amount of time as it usually would at that percentage. 1-2 days.
just get a 2A (2000 mAh) charger, and then you'll charge really fast
i use that in my car every day
So you're saying that letting the phone charge for 5 minutes gives at least 75% charge, then you unplug and run for 1-2 days?
That would take charging the battery with 15A which is 12C (the Vibrant's battery is 1250mAh isn't it?)
That'd be 13.5A down your usb lead from a PSU that should only have a 0.7A output.
I call shenanigans I'm afraid, your phone is fibbing to you
i'm pretty sure that quick charging your phone when it is not made to will decrease your overall battery life/ capacity.
xaccers said:
So you're saying that letting the phone charge for 5 minutes gives at least 75% charge, then you unplug and run for 1-2 days?
That would take charging the battery with 15A which is 12C (the Vibrant's battery is 1250mAh isn't it?)
That'd be 13.5A down your usb lead from a PSU that should only have a 0.7A output.
I call shenanigans I'm afraid, your phone is fibbing to you
Click to expand...
Click to collapse
Yup. 1500mah.
I'm just saying that's what the phone's saying ya know. I know next to nothing about battery output, storage, etc.
From 0% as in so drained it can't turn on, to plug in, to turn on while plugged in for a few seconds, it said 35%.
So phone's probably lying as u said, but have yet to test how long it lasts.
Theoretically, it should only lasts a few minutes right? Max of 10 minutes r so I'd imagine? (Yes, I'm asking for ur opinion)
Oh, and I use a live wallpaper too, on 24/7. Just a bit more power drain.
*update*
3 minutes later after I restarted it again, just to check if it was a complete dud reading.
Made mistake of not unplugging.
It's reading 51 percent now......6 minutes of charging.
-going to check how long this lasts.
^Least I know how to make my phone think its good^
i have a 1A charger in my car... gets my phone nice and hot and wont even charge my friends olllllddd android phone..
House3272 said:
Yup, my thoughts exactly. But as it turns out, it lasts for the same amount of time as it usually would at that percentage. 1-2 days.
Click to expand...
Click to collapse
Then obviously when it's reading 10% it's not actually that low. It's more likely that it's a mis-reading and is actually at ~80%. You run through your steps and in ten minutes you have an accurate reading of ~90%
No big mystery, batteries don't always report accurate information. Try flashing a different ROM, use another battery, try a battery calibration app. You'll soon start seeing different results.
Failing that, submit your findings to a Science Journal and wait for the $1m reward that comes with the Nobel Prize that is sure to follow!
DirkGently1 said:
Then obviously when it's reading 10% it's not actually that low. It's more likely that it's a mis-reading and is actually at ~80%. You run through your steps and in ten minutes you have an accurate reading of ~90%
No big mystery, batteries don't always report accurate information. Try flashing a different ROM, use another battery, try a battery calibration app. You'll soon start seeing different results.
Failing that, submit your findings to a Science Journal and wait for the $1m reward that comes with the Nobel Prize that is sure to follow!
Click to expand...
Click to collapse
haha yeah! even Samsung still researching how to charge phone faster (trying to use new design battery) and his saying he found a loop hole around it? lol~
obviously not ~.~
As others have stated, the battery information is just probably inaccurate. You can recalibrate it by draining the battery completely and recharging to full.
Hi all
Is there a definite answer to how you should charge your battery? Is it better to charge it before it gets to 40% like I have read or does it not really matter?
Also does charging it overnight do any damage?
Thanks all
Chris
Sent from my Nexus 7 using Tapatalk 4
The problem with battery care is that it has been tainted with old information that no longer applies to modern batteries.
The charging and discharging of the battery is tightly controlled by an IC to maximise life regardless of how you use it. All you need to be concerned with is making sure it doesn't sit fully discharged or fully charged for long periods (this is why when you first unbox a device it has about half charge)
Doesn't matter... just charge it when u think it s need to be charged...
High temperature is bad. Full charge is bad (charging 0.1V less than full generally doubles battery life). High temperature + full charge is really bad (negative synergies).
Overdischarge is bad as well, but if you stay above 3.3V or so, there should be no negative effect.
I have hacked my kernel to lower the charge voltage setting from 4.3V to a configurable value between 4V and 4.3V. I will release a kernel patch, once I have done some more testing.
BTW, a lower charge current is better for the battery as well. So if you have time, you can use a standard USB port (only provides 2.5W instead of 6W with the included charger) or add a USB extension cable/use a longer/thinner wire gauge micro USB cable (this will limit the power drawn from the included charger).
Put it this way:
You will have moved on from this device long before you would notice any battery problems caused by "bump charging", charging overnight, or any other normal charging behavior.
Check the Battery University for details about charging Lithium-ion polymer.
tni.andro said:
High temperature is bad. Full charge is bad (charging 0.1V less than full generally doubles battery life). High temperature + full charge is really bad (negative synergies).
Overdischarge is bad as well, but if you stay above 3.3V or so, there should be no negative effect.
I have hacked my kernel to lower the charge voltage setting from 4.3V to a configurable value between 4V and 4.3V. I will release a kernel patch, once I have done some more testing.
BTW, a lower charge current is better for the battery as well. So if you have time, you can use a standard USB port (only provides 2.5W instead of 6W with the included charger) or add a USB extension cable/use a longer/thinner wire gauge micro USB cable (this will limit the power drawn from the included charger).
Click to expand...
Click to collapse
Gulp none of that made sense
chrisnewton said:
Gulp none of that made sense
Click to expand...
Click to collapse
Then you need not worry about it. As I said, the battery is controlled by a fairly sophisticated IC, just charge it whenever you need to.
these batteries love refridgerators. you charge it when it comes to about 20-25%. I'm not compelling anyone, it's just that I've had this type of cycle since three years on my faithful ol' HTC Desire. Now its all burned, but I did have something to compare it with. My czn also got an htc desire a couple of days after i got it, and he is charge-freak. He charges his phone in his home, car, uni, bank, everywhere he can get his hands on a socket. The result: he's run down 4 batteries, and is on the brink of a 5th one. while I had only one throughout my three-year life cycle of my Desire.
So, try not to overheat your battery. Don't use it when charging. Charge it before you sleep at night, and let it rest for overnight. This overnight rest boosts battery life, and your charge will last almost 2 days. this is my personal experience speaking, and with the multitude of custom OC UV kernels out there, you might wanna go Chuck Norris with your battery.
Generally the most common way people damage the batteries is just by heat. Other charging ideals aren't really all that important in the grand scheme of things. The phone and chargers are smart enough to handle the other aspects.
Heat's a problem because the act of charging actually creates heat. So while you think it may not be too hot when it's charging in the mid-day sun in your car, it will be when it warms up from charging. It'll get so hot, in fact, that it may even refuse to charge, although you see this happen more on phones than tablets.
Also, don't leave your tablet dead for a month. That's bad. I don't think anyone does this, though, because what's the point of having a tablet if you leave it dead for a month?
Hey guys. Within a minute or so after my phones removed from the charger it drops to 95%.is this normal?im using the 1.8a LG charger that comes with the phone F240L.i read somewhere that they are using the LG charger 1.2a out of the box.does this phone have two different out of the box charger..thanks..
Completly normal. The method that seems to be employed for the battery percentage is read the voltage itself and make a guess
This high voltage drops down quite quickly both as a "load" is applied to the battery,. Plus there is not a lot of change in capacity from the very high voltages to the more normal voltages, in any li-ion battery. So while the voltage can be used to guestimate a range of charge levels, between like 4.0 and 4.3 there isnt much changed in the battery itself.
Further from what i have seen so far (not totally sure) they are charging to 4.35v which is a rescent slight change in the chemistry of the li-ion to allow for higher charge levels without it gassing or reducing the life (Havent tested that theory long enough yet either).
Also All li-ion alogrythms for charging do a CC CV charge, where the final charge is just "holding" the voltage at the high, till the batterys charge state floats up to that level. This can (not facted out yet) mean that leaving it on the charge past the time it claims it is fully charged , it will put tiny bits more into it. This happens more with my big fat zerolemon battery because it seems to have more resistance to the other connected cell items than would be desired.
Anyways all is well, just dont believe anything a computer tells you , and it will be fine The other methods have thier own deficiencies.
Other STUFF:
Li-Ion batteries really do not prefer to be left at their high charge voltages, as they degrade faster there. so when you read the above, or try "bump" charging methods (thats just restarting the charge) It is not good for it. The battery will be happier, using it like it was designed, taking it off the charge when it states it is full. all of this being more info than anyone needs to know, or freaking care about.
As a li-ion battery becomes old and weak, it will exhibit even more of these charateristics that have people wondering. It will drop off the highs quicker still, have less total capacity, and increse a tiny bit in resistance , which will cause it to drop even more under load. At some point the battery would be so bad at that, you would want to replace it.
Heat, the li-ion cells dont like these extreeme heats. they prefer to work more at normal room temps and cold but not extreeme cold. So take that in also as a factor in keeping your battery more happy, again if you want to waste half your life pampering the thing
runwithme21 said:
Hey guys. Within a minute or so after my phones removed from the charger it drops to 95%.is this normal?im using the 1.8a LG charger that comes with the phone F240L.i read somewhere that they are using the LG charger 1.2a out of the box.does this phone have two different out of the box charger..thanks..
Click to expand...
Click to collapse
It's the calibration. Happens to me too sometime. Drops rather fast to 95%, then goes stable around 89%. Just leave it on charge for an extra 45 minutes or so, then let the battery die down to at-least 10% before charging again. Not exact science, it's just what I do.
Did anybody get issues months after they'd purchased the device?
My 8.4 Pro worked perfectly (6-8h SoT, 100% charge everytime) for about 2 months, but hasn't been charging properly since yesterday. I tried combos of all my charger/cables - they are all giving 1A+ rate on my other devices, but not even being measured on the tab (vis Ampere). Battery has been stuck around 50% for ages. I'm in India, so no easy way to get this back to the US for warranty replacement. Besides, by the time I return to NJ, the tab will be out of warranty.
Please note that I have also factory reset it. The problem, unfortunately, persists.
What should I do? This may not be a software issue: I use this tab while I'm on a stationary cycle, so maybe that motion somehow 'knocked' the battery out of whack somehow? Should I open up the tab and do a battery reset? Is there any, less dangerous, solution?
SoberDogs said:
Did anybody get issues months after they'd purchased the device?
My 8.4 Pro worked perfectly (6-8h SoT, 100% charge everytime) for about 2 months, but hasn't been charging properly since yesterday. I tried combos of all my charger/cables - they are all giving 1A+ rate on my other devices, but not even being measured on the tab (vis Ampere). Battery has been stuck around 50% for ages. I'm in India, so no easy way to get this back to the US for warranty replacement. Besides, by the time I return to NJ, the tab will be out of warranty.
Please note that I have also factory reset it. The problem, unfortunately, persists.
What should I do? This may not be a software issue: I use this tab while I'm on a stationary cycle, so maybe that motion somehow 'knocked' the battery out of whack somehow? Should I open up the tab and do a battery reset? Is there any, less dangerous, solution?
Click to expand...
Click to collapse
You need to use a 2A rated charger and really there is only a few that qualify, I suggest you only use the Samsung charger as they seem to have a certain way to charge it, chargers do go bad sometimes so look for an official replacement (they cost like $5 on ebay), beware of knockoffs though since they look identical, I suggest searching for the same model number on the charger. IE : EP-TA10JWE
anyways here are some things to try in the meantime
1. drain the battery down to 15%
2. hold the power button down and choose the Power Off setting, wait until you feel it vibrate, now let the tablet sit for an hour in this state. (do not hook it to a charger)
3. after an hour or two, plug the charging cable into the table and let it charge (do not turn it on), you should see an animated battery screen show up a few times, see if it reaches 100% in this "powered off" state.
if it does then that could mean there is an app running in the BG when it is started causing a lot of cpu load or keeping it awake..
I've so far had my tab 8.4 for almost a year and the battery is still holding up with 8-10h of runtime (depending on what I do). and it always charges to 100% using the samsung charger.
otyg said:
You need to use a 2A rated charger and really there is only a few that qualify, I suggest you only use the Samsung charger as they seem to have a certain way to charge it, chargers do go bad sometimes so look for an official replacement (they cost like $5 on ebay), beware of knockoffs though since they look identical, I suggest searching for the same model number on the charger. IE : EP-TA10JWE
Click to expand...
Click to collapse
The chargers I tested were rated 2A, and their cables were 28/24 AWG. On my Dell Tablet, the same setup was giving me around 1300 mah. On the pro, most of the time the current didn't even get measured.
Tried the other things you mentioned. It charges, overnight, to 100%, but despite the factory reset, weird battery behaviour is observed: slow recharge, jumping from 93% to 100% the moment i connected it to the lappy to transfer data, etc.
SoberDogs said:
The chargers I tested were rated 2A, and their cables were 28/24 AWG. On my Dell Tablet, the same setup was giving me around 1300 mah. On the pro, most of the time the current didn't even get measured.
Tried the other things you mentioned. It charges, overnight, to 100%, but despite the factory reset, weird battery behaviour is observed: slow recharge, jumping from 93% to 100% the moment i connected it to the lappy to transfer data, etc.
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You are using the Samsung charger?, I noticed with other chargers for some reason when the battery gets near full the mA drops to under 200mA and stops charging the battery or its just enough to keep the tablet running, this does not happen with the Samsung charger it mostly charges the tablet at 1880~mA, when its in the 90% range drops to about 600-800mA so it can still trickle charge the batt and provide enough power to keep it running.
I have tried other chargers like the 2A HP Touchpad Charger (was supposed to be the best charger out) and some 2A powerbanks - and they all fall short near 90%, just don't pull enough amps, I think the samsung charger has a higher voltage too 5.60v where the others are around 5.30v
btw I have an actual hardware mA cable that shows the current in realtime, I'm not sure how accurate the battery monitor programs are for android without root access, since without root I don't know how they read the system files.
otyg said:
You are using the Samsung charger?, I noticed with other chargers for some reason when the battery gets near full the mA drops to under 200mA and stops charging the battery or its just enough to keep the tablet running, this does not happen with the Samsung charger it mostly charges the tablet at 1880~mA, when its in the 90% range drops to about 600-800mA so it can still trickle charge the batt and provide enough power to keep it running.
I have tried other chargers like the 2A HP Touchpad Charger (was supposed to be the best charger out) and some 2A powerbanks - and they all fall short near 90%, just don't pull enough amps, I think the samsung charger has a higher voltage too 5.60v where the others are around 5.30v
btw I have an actual hardware mA cable that shows the current in realtime, I'm not sure how accurate the battery monitor programs are for android without root access, since without root I don't know how they read the system files.
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Getting a slow current with the 5.3v samsung charger and cable as well. But yeah, using software (GSM battery, Ampere) to get the charge.
SoberDogs said:
Getting a slow current with the 5.3v samsung charger and cable as well. But yeah, using software (GSM battery, Ampere) to get the charge.
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Hm I suppose the battery could of went bad if it wasn't being charged properly by some chargers for example if it was never reaching 100% then the system never shuts off the charging mechanism and will essentially cook the battery causing it to die faster then normal .
If you had root access you could check the status of the battery and it would report the battery info in stages - very good (brand new), good, bad, fail ..etc I am not sure if non root programs can access this info.
I guess there are a few extra things to try.
1. A new Samsung charger, it might be possible yours went bad.
2. re-seat the battery, though this requires opening the tablet possibly voiding the warranty or causing other damage - maybe take it to a repair shop if you have difficulties, from what I have read on this forum it has solved numerous cases like yours, not sure exactly what it does perhaps removing voltage from the hardware causes and glitches to reset like from accidental static electricity shocks or if it just re-calibrates the battery like it was replaced..etc, it might just be the connector comes loose, anyways it sucks Samsung didn't included a reset button since it's a needed feature for sealed tablets)
SoberDogs said:
Tried the other things you mentioned. It charges, overnight, to 100%, but despite the factory reset, weird battery behaviour is observed: slow recharge, jumping from 93% to 100% the moment i connected it to the lappy to transfer data, etc.
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This is a fairly common issue on this device. Its a defect, I'm thinking its the "smart battery" circuitry on the battery itself (my understanding, at least some of the metering is done on the battery by this circuitry). Its been discussed at length on the following thread; with the suggested fix being to open up the tablet and "reseat" the battery: http://forum.xda-developers.com/galaxy-tab-pro-12-10-8/general/reseating-battery-wonder-battery-life-t2944610
I've had this problem for a while now. The issue was non-existent or rare at first, then got more common after owning the device for a few months. Haven't used any apps to measure the mA, but this is across 3 or 4 different chargers, 2 of which are original Samsung 2A chargers (had another one left from my broken Note 8). The issue also persists whether on stock ROM, custom TouchWiz ROM, or custom AOSP ROMs.
Sometimes the tablet will charge fully, no issue. Sometimes it will stop somewhere along the way (well short of 100%) and doing a reboot will usually get the charging "going" again. Sometimes I will need to reboot 3 or 4 times to get it charged to 100%. I've also tried factory resets, but its hard to say whether this helps or not.
Short of rebooting while charging, there isn't much I've found to help. I haven't tried opening the device to reseat the battery.
Maybe the usb port in the tablet has some debri in it. Try blowing it out with some cpompressed air. The symtoms sound like a faulty usb cable but if you have tried different ones it might be the port.
Sent from my SM-T320
Hello!
Charging problems started to occur a month ago on my phone. The problem is that it charges really slowly, but other times normally.
I experienced that if I plug in the phone when the battery is between 20-60% it charges super slowly.
Sometimes it speeds up but more often not.
Here are some screenshots that show that sometimes it takes like 6 hours to charge and sometimes it basically just hovers around a percentage and doesnt do anything. Gets like 10% overnight.
On the second picture you can see that it charges normally till it reaches 55% then it slows down to like 5%/hour speed.
I noticed this while the phone was draining battery even tho it was plugged in while using it.
I bought a new OEM battery and its the same with it aswell. Some chargers charge it quicker, some slower, but the problem occurs with every charger.
What do you guys recommend me to do?
Thanks a lot!
is your charger 2 Ampere as it should be?
U can also try to recalibrate the battery deleting the data/system/batterystats.bin file
haget83 said:
is your charger 2 Ampere as it should be?
U can also try to recalibrate the battery deleting the data/system/batterystats.bin file
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Thanks for the reply!
I have used many chargers since I have this problem, but mostly the one that came in the box.
Ill try deleting that file if its possible withouth root.
Edit: It seems i need root for it, so its not an option for me.
Kr3Ep said:
Thanks for the reply!
I have used many chargers since I have this problem, but mostly the one that came in the box.
Ill try deleting that file if its possible withouth root.
Edit: It seems i need root for it, so its not an option for me.
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Actually brother initially same problem occured with me and it was persisting on the same way load since i come to change my charger now before i was charging it with blackberry passport charger it was really cool and even charges it faster that i mean around 50% faster than the previous charger, but now days m befitted with moto g4+ which meets to charge my lg g3 around 65% faster
But brother dont use any local company pr anypther charger as it may damage the phone display which may come to cost you at high
There are going to be 3 main factors that you want to address:
- Battery
- Charger/charging cable
- Software
It seems you have already addressed your battery. That's usually the #1 culprit, but you've already replaced it so you can rule that out.
The next is the charger and charging cable. This is often overlooked. The stock charger is 5 volts and 1.8 amps (5v 1.8a). Before more advanced smart phones were developed, almost all USB chargers never produced more than a 5v 1.0a charge (most were 5v 0.5a). So you want to ensure you are using at least a 5v 1.8a charger. (I even use my Fire Tablet charger on my G3 which is 5.1v 2.2a, and that works great too). Note that all USB chargers have their output volts/amps printed on them somewhere (usually in very tiny print). The USB cable you are using matters too. The thinner the wire gauge and the longer the cable is, the less power is transmitted. For example, if you're using a thin and cheap 6 foot (2 meter) USB cable on a 5v 2.0a charger, you may only be getting 1.0a of charge from it. If you use a thicker, shorter, and more expensive 3 foot (1 meter) USB cable on that same charger, you ensure you get that full 2.0a of charge (or close to it). The two factors to look for in a USB cable is length (length = resistance = less amps) and wire gauge (not insulation thickness).
The last is software. If you have any way to backup and restore (ie nandroid) your ROM from recovery, I recommend doing that first because it's easy. If you backup your current ROM, factory reset, and the issue persists then you know its the charger/cable. If the issue is gone, then you know it's something in your current ROM. If you do not have access to backup/restore features and/or do not have root, then next you can use the Android OS Battery stats to carefully go over what could possibly be draining so much power when the phone is on or off. There are also several apps that will help you determine where the battery drain is coming from. Note that software can not prevent your phone from charging, but it can drain power so fast, that there is not enough left over to charge the battery. This is especially bad for our G3s because they easily overheat if they are charging and heavily discharging simultaneously.
Hope that helps! Good luck! :fingers-crossed: