yashsingh1/xdaforums huggingface dataset:
[Galaxy Note 8.0 (Tablet) General] rtiangha:
Well, I don't know if it's related or correlated, but I actually bought my Note 8 used off of a person and it did come with the official Samsung smart cover. It exhibited the battery issues from the day I got it though, but I've still been using it as is (i.e. never removed the magnets) ever since I did the battery pull, and it's been working fine.
[Galaxy Note 8.0 (Tablet) General] alvinlts:
Finally gone and done it - reconnected the battery, 58% before disconnecting, 75% after reconnecting. Now battery life is like new, and no more sudden percentage drops or suspiciously quick recharges.

One thing though - how often do I have to do it? I assume that given the chip is faulty in some way the performance would degrade over time, right? :rolleyes:
[Galaxy Note 8.0 (Tablet) General] fajabird:
Are you using an magnetic cover (auto switch-on/off)?
[Galaxy Note 8.0 (Tablet) General] alvinlts:
I'm using the original cover - so yes.
[Galaxy Note 8.0 (Tablet) General] fajabird:
I just tried to identifiy all affected people here who disconnected their battery (counted 11 so far, including you right?). Your statement confuses me a bit: should I count you to those who possibly got affected because of a magnetic cover or not? If not why - you state that you have been using such an cover and you have disconnected the battery because you had issues. Thanks.

---------- Post added at 10:33 AM ---------- Previous post was at 10:30 AM ----------

Here is a list of people who disconnected their battery because they had issues. If youre on the list, could you please post if you have been using an magnetic cover (auto-switch-on/off): so far 4 reported yes and 0 no!

TheNeighbor101

drezman

bravogee

xonyl

25jan

oinky_08
[Galaxy Note 8.0 (Tablet) General] TheNeighbor101:
I have not been using any magnetic cover since I have had the Note 8 since April 2013.

The issue of my device is its battery just started having fast drops and going full suddenly when reaching some 80%.

I now have no problems with my battery after unplugging my battery. It now lasts some 7 hours of accumulated screen on usage.
[Galaxy Note 8.0 (Tablet) General] Shofar1:
Just watched a 1 hr movie.

In the past I would drop 10% per hour but this time I used bluetooth direct to my hearing aids and it droped 30% in that hour.

I'm sorry I didn't think to check the bluetooth drain. Does anyone know?

I am using an inexpensive MOKYO cover with magnets, never experienced a problem.

---------- Post added at 05:29 PM ---------- Previous post was at 05:27 PM ----------

Just watched a 1 hr movie.

In the past I would drop 10% per hour but this time I used bluetooth direct to my hearing aids and it droped 30% in that hour.

I'm sorry I didn't think to check the bluetooth drain. Does anyone know?

I am using an inexpensive MOKYO cover with magnets, never experienced a problem.
[Galaxy Note 8.0 (Tablet) General] intelliriffer:
1. Yes I disconnected the battery. No I didn't have major issues beforehand other than battery jumping from 97-98% to 100% but this happens on my other samsung devices as well as many other n5100 tablets we have at a work site (around 40) and most don't seem to have magnetic covers (or was told by engg).

I tested this on another n5100 that was having battery level problems and it has been better since, (the user of that tablet (no cover) was using his note as a kinda big alarm clock mostly always plugged into mains. and was easy to assume that caused it.)

2. I too used to have severe drain issues but those were fixed with an updated 4.2.2 firmware. also note that my note's motherboard and display had to be replaced due to a liquid accident. (and that repair would have reset my battery anyways (from the factory state))

3. Please don't take it in a negative way, but the test you are running does not have a big enough sample data pool to be of any significance.

it's inconclusive scientifically as well as statistically (it's perhaps ok for a personal observation). You need some sort of mass poll / survey first to get significant enough data pool (an hope that it's accurate) that a forum thread cannot provide, at least in a small time frame.Any conclusions derived otherwise will merely add to more confusions and misinformation than is already present.

for 95% users the problem is not with the battery itself but its data representation, i.e the correlation between what you see and what you have. (which is non-linear , and thus determined algorithmic and results can get messed up at times). (kinda like neural networks in a sense)

I do understand that you are trying to find a common denominator , however there are many other less obvious factors that can influence the issues being experienced the same (fuel gauge chips being one of the most notorious amongst them).

so, in a nutshell, My device Battery did not get affected by magnetic cover, the other device I did get fixed (or for the time being) by unplugging the battery never had a cover.
[Galaxy Note 8.0 (Tablet) General] intelliriffer:
Battery Inaccuracies / Issues Poll

I have Started a Poll located here : http://xdaforums.com/showthread.php?t=2555528

that should hopefully help gather some data.

I hope most users over here do participate and give us a better perspective.
[Galaxy Note 8.0 (Tablet) General] fajabird:
Did someone try this procedure without to open the device?

http://xdaforums.com/showthread.php?t=1215182

According to the max17047 data sheet this FG does have a relaxed state detection. It's configured by the RELAXCFG register. Does anyone know the values? The data sheet states that after 96 minutes without any load over a specific threshold the full relaxed state is assumed. Further a relaxed state is detected after whatever is configured in that register.
[Galaxy Note 8.0 (Tablet) General] rtiangha:
I did (that's the procedure to reset the fuel chip on the original Galaxy Tab 10.1, which I also have), and it didn't seem to work on the Note 8, although it's quite possible that I got the timing wrong. Others are welcome to try it though.
[Galaxy Note 8.0 (Tablet) General] xonyl:
I tried the procedure of unplugging the battery the other day. Actually, I tried it twice, since the first didn't give me the awaited results.

I must admit that I really don't know if this procedure improved my battery life, cause I barely can have more than 4 hours of cumulated screen time (see the pictures below).

I'm thinking about doing it a third time (unplug it for around 2hours maybe) and see the results.

Plus, unfortunately, my LCD (and digitizer I think) broke off after the device felt while trying to open it :( Now I have a corner totally broken, with cracks all on the screen...

Keeping you informed.
[Galaxy Note 8.0 (Tablet) General] dewadewi:
I decided to claim the warranty and ask for battery replacement,it took a while on the process. Now with the replaced battery I've got 8% drain on dead trigger2 and 17% of plant's vs zombie 2 both for 30 mins gameplay with stock n unrooted... not bad.. a little happier now :)

but I still curious, with the replaced battery I only get 3576 on lowest voltage discharge, what I heard Li-ion could go down as low as 3200 volt before ask for charge. but generally I'm satisfied now..
[Galaxy Note 8.0 (Tablet) General] fajabird:
This is not my final conclusion, I'm still investigating, but it seems that disconnecting the battery solved my issue just for one charge/discharge cycle. I got impresive (to me) 7,5+ hours of screen on time over 4 days standby time. Maybe it was a failure but I let drain the battery until the unit powered off (and in contrast to before disconnecting the battery I could not turn it on without starting to charge). So the battery was really empty this time. The charging process then had a jump at 93% to 100% and I only had 4,05 volts after disconnecting the charger and letting the battery settle for a while. So I tried to charge again after discharging to about 60% and the unit charged very slowly, charger not becoming warm.

Next thing I tried is charge, poweroff, wait cycles until I could reach as much volts as possible. After reaching around 83% while charger was getting cold I turned the unit of for some hours. After turning it on it jumped (without charger plugged in) to 100%. So there is some kind of adjustment hours place when battery is "relaxed". I managed to reach 4,1volts after another cycle. Now I'm using it normaly and will see...
[Galaxy Note 8.0 (Tablet) General] Shanon1:
Battery life

I get about 2-3 days on single charge with moderate use browsing internet, watching YouTube, some games etc. Mind you I keep brightness to 25% , Bluetooth and GPS off , app notifications off.
[Galaxy Note 8.0 (Tablet) General] jramna1:
fajabird>>>Battery Issues same as mine...

I havnt opened it to take out the battery and test it as you have done, but i have this crazy intermittent battery charging/discharging as well. I estimate at worst i get 1hr 30mins, and at best i get 3hrs 30mins of constant use, on 25% brightness, with only only wifi on. (no bluetooth/notification etc)

im seriously considerting takin it in for repairs. sigh. and i only bought mine in late august 2013.

btw, [MENTION=4217578]fajabird[/MENTION], did you find out anyting new, any permanent, tangible fix or solution to this issue.
[Galaxy Note 8.0 (Tablet) General] Shanon1:
Improve the battery life

There are several ways to improve the battery life of a device-

- Reduce the brightness of the screen

- Switch off GPS

- Switch off Wi-Fi if you are not accessing the web

- Switch off Auto Sync.

- Properly check the permission of each app you download from the app store because some apps with irreverent permissions quickly drain battery.

---------- Post added at 04:34 AM ---------- Previous post was at 04:23 AM ----------

The battery life is pretty limited, limited in the sense you can charge it limited number of times. So, to increase the life time of battery, it is necessary that you use it wisely. Also, you can put of the tablet while charging if possible, so it will charge faster and not get heated.
[Galaxy Note 8.0 (Tablet) General] fbueller:
Switching off GPS won't help battery life on Android - it's only accessed when specifically accessed and you can see the icon in the notification area blinking or locked. Otherwise it's not running, just available to run when an app needs it.
[Galaxy Note 8.0 (Tablet) General] fajabird:
No, I have no final conclusion. While it seems to be much better since I disconnected the battery I still do have some issues. Generally it seems to be good to drain battery until unit powers off and then reboot the unit until it won't power on anymore. Rest for an hour or two, then charge it booted up until it says "full" (attention, 100% is NOT full). But I need some more cycles to get more consistent info. You should install a battery logging app (e.g. Battery Log) and monitor charging/discharging process.
[Galaxy Note 8.0 (Tablet) General] ejs123:
I had the same quick drain problem. I disconnected the battery and discharged the battery completely. That seemed to fix the problem.
[Galaxy Note 8.0 (Tablet) General] fajabird:
Because even I disconnected the battery like suggested my problems persisted I tried the following method to reset the fuel gauge chip instead of cracking the device open once again: let battery drain until devices powers off, then boot into recovery (I have stock recovery) and let device sit in recovery until device switches off (which scarried me because display begun to flicker while not getting enough power to work properly). I don't know how dangerous this is for the battery because in recovery the device does not care about battery level. The device will run until the battery's safe-guard cuts power off (althoud this is what I was aiming for). Normaly this safe-guard shoud prevent damage to the battery from low-discharges but I don't know it really for sure. It seems that I was successful at least getting any power to be cut off completely because system clock has been resetted after I managed to charge and boot the device again. The only thing which was not ok is charging. First attempt to charge while device was still powered off resulted in getting charging animation but a cold charger and even after a couple of hours the charging animation showed only minimal charge. So I booted the device up and continued to charge with same result. Then I disconnected the charger and connected again and charging begun at a moderate rate until 100%.

So if someone is affected and is willing to accept some negative impact on his battery (which is already not working properly) instead of cracking up the unit this could be a way. Currently my device is taking the second charge (20% to 100%) after conducting this procedure.
[Galaxy Note 8.0 (Tablet) General] casper66m:
Wifi on, standby for 5 hours, 30% of battery goes!!!
[Galaxy Note 8.0 (Tablet) General] valkyrie-randgris:
1hr 14mins on battery, 56mins Screen time; now at 62%. I need those safe open pry tool to get this thing opened already. Battery life sucks.
[Galaxy Note 8.0 (Tablet) General] dewadewi:
I don't know bro, but after I claim the warranty I'm satisfied with the battery, 5 Day of use with 10 hour of screen time (browsing, youtube and mostly reading) is for me is well enough (unrooted, no power saving, auto brightness, occasionall wifi and airplane mode all the time) the other day I used mixed with gaming and I get roughly about 6-7 hour... looks like previously I have a defective battery...
[Galaxy Note 8.0 (Tablet) General] dynamikd:
Decent Battery

I cannot complain about the battery life of this tablet. Granted, it doesn't last as long as my Nexus 7, but it's definitely not bad.:good:
[Galaxy Note 8.0 (Tablet) General] Sturmenstrudel:
it works!

I followed the unplug/plug method described here... and it is now amazingly back to its original performance!

Thanks for the tips, you are great.

I am also using the original Samsung magnetic cover.

Guido
[Galaxy Note 8.0 (Tablet) General] Zaybatzu:
You mean connecting disconnecting the battery?

At what percentage disconnected the batteries?
[Galaxy Note 8.0 (Tablet) General] Sturmenstrudel:
Yes. I disconnected the battery when it was 26%, let it out for ca. 2 hrs. When reconnected, the indicator jumped up to 62% and battery discharged smoothly, giving 6hrs+ of screen activity. Before, it was barely possible to achieve 2 hrs!

Guido
[Galaxy Note 8.0 (Tablet) General] tatchero:
battery

Hi guys I really don't understand why this happens but each time am charging my note while using it the battery meter decreases instead of increasing. And the battery meter always jumps from 80 to hundred. It really pisses me off! Is it from my charger?
[Galaxy Note 8.0 (Tablet) General] valkyrie-randgris:
Will opening the back cover somehow voids the warranty? I know it sounds stupid, but I need to be sure before yanking it off.. Haha. Thanks in advance!
[Galaxy Note 8.0 (Tablet) General] alvinlts:
Sigh, a month or so after disconnecting, the battery level starts acting up again.

May be i should consider a warranty exchange... not sure that will help though. :(
[Galaxy Note 8.0 (Tablet) General] tatchero:
fixed for now I guess

Ok, so my battery was totally screwed up. Like it takes 30mins to hit battery full, and barely 2hrs of on screen time.

I had to hit a mission impossible contract of disconnecting the damn battery. So i did disconnect the battery after all, and also got myself a new HTC charger. Now my note is back to normal. Before, while charging and browsing, the effing battery meter decreases. #veryFrustrating if you ask me.

But after everything my note's battery life is back to normal.

SO, a recap of what I did, 1) disconnected the battery 2) got a HTC charger. With an output of 5V--1A

hope that helps.

Ehmmm, but I cracked my screen in the process. So Pls be careful when disconnecting.
[Galaxy Note 8.0 (Tablet) General] artin1993:
Hi.

First of all I am not a developer and have no idea if this is correct/safe therefore I ask here for some opinions and don't blame me if you screw something trying this.

My Note 8 is very "young" around month or so. After a week of frequent and short charging (I was keeping it in 30-70% range charging sometimes 10 times a day for few minutes) it started acting strangely. It could be charging all night long and end up with only 90% in the morning. Also sudden drop from 12% to 0 was a point when I started to think I might got affected with fuelgauge problem. I am afraid to rip open my Note so I was looking for fuelgauge software reset methods... Tried them all and the one I quoted above was the last one I've tried. Nothing worked. But then I started to mess up with files and was looking for maybe another batt_reset_soc and I found it.

So I did:

echo "1" > /sys/class/power_supply/battery/batt_reset_soc

and this for the second file:

echo "1" > /sys/class/power_supply/max17047-fuelgauge/subsystem/battery/batt_reset_soc

Both of course require root access.

Quite frankly I am not sure if this is other file or the same one so I would like someone more experienced to share his knowledge. I think it worked for me but as my problem was quite small in the first place I think it might be placebo after all.

Sorry if what I've wrote is total bull**** but as I said, I'm no developer nor I have any in deep knowledge of android and I am here to get some more experienced users to have a look.

Cheers,

Robert.
[Galaxy Note 8.0 (Tablet) General] fajabird:
Did you try to fully discharge the battery (play a movie until unit powers off), might help a bit.

BTW. The two files are the same (one is a link to the other). I had no success with both - sorry. And even I disconnected the battery which recovered my battery life to normal for a few days it started acting crazy more and more with each charge cycle again. So finaly my note8 is now send in to service. I think that the batteries are faulty and the fuelgauge-chip is going nuts because of that.
[Galaxy Note 8.0 (Tablet) General] bryanblue24:
Same here, I tried opening my device last november to disconnect the battery then after more than a month my battery got messed up again. Voltage drops till 3200mv and full charging only takes about an hour. I tried to disconnect the battery again this time. Will post if disconnecting the battery again will fix the issue (I really hope it does).

PS: I got a decent battery lasting up to 8 hrs of screen time when I first disconnected the battery. Im using Note 8 gt n5120.
[Galaxy Note 8.0 (Tablet) General] valkyrie-randgris:
So I ended up turning it back to Samsung, which they found it as a Battery Problem (instead of software problem=reformat).

I got my battery replaced after week and happy with its performance. 12 hr on battery, 7 hr screen time, about 6 hr gaming (avabel online,wifi on) with 10% remaning. :)
[Galaxy Note 8.0 (Tablet) General] Slipurson:
Noticed that I got better batterytime after I got my Screen changed So I guess that they had the battery out for quite some time.

I hope people here realize how much the batterylife differs from the wifi to the 3G to the LTE -versions, trying to get two days of usage out of the LTE -version, while also using it normaly, is not the easiest project to take on. :)

It can be done, but then I have to turn off mobile data etc and only have it on when I really need it.

Sent from Galaxy no. N5120 via the LTE-network
[Galaxy Note 8.0 (Tablet) General] cheryanne:
My charging port stuffed up over Christmas - my Note wouldn't charge at all. I couldn't even unroot it to send to samsung. So I bit the bullet and took it to a repair kiosk. They fixed the port and cleaned up the whole area, and battery life has never been better, not even when the Note was brand new.

Galaxy Note 8.0 Xposed Build N5120XXCMH2 / Baseband N5120XXBMD9 / Kernel CivZ-SphereXtreme-REV on Telstra LTE
[Galaxy Note 8.0 (Tablet) General] JimboJones2456:
And this is why I use xda-developers.com!

Just bought a Samsung refurbished Note 8 (wi-fi only, left everything stock for now). Looked great, just like new. Unfortunately my first session of web surfing (just wi-fi, not on power-saver mode) and just over two hours and my battery was down to 50% already. After the next full charge it was already looking like it was going to be even worse than that.

My charge was at 68%, I shut it down, cracked it open and unplugged the battery for an hour.

I plugged it back in (without turning it on) and started charging it and the battery icon showed below 50%.

I left it charge overnight without turning it on.

Turned it on this morning and went to class for 4 hours. After leaving my 4 hours of class (almost constant use with wi-fi, S-Note, Gmail) the battery was just under 70%! Huge difference!

Thanks for the how-to pics and video!
[Galaxy Note 8.0 (Tablet) General] bryanblue24:
What to do? May note's battery voltage is erratic. When plugging the charger it goes up immediately to 4200mv then when you disconnect the charger voltage goes down as low as 3400mv this happens even if Ive already charged it for 5 hours.

All of these issues happened when I tried opening the tab and disconnected the battery. Erratic voltage drops can be fix if I remove again the battery but then after 1 batt cycle the problem / issue re-occur any fix?
[Galaxy Note 8.0 (Tablet) General] am2010r:
Hi all.

Is there any way to get the battery life better without opening the device ( Software Solution) ?

My Note is new ( 7-days) running 4.1.2 Stock rom but l can't exceed 5 hours of Screen time ( Wifi on ,Sync on , brightness auto, No Sim card, others off)

I have out my warenty because l am rooted ( Is there away to back wareuty back with reset flash Counter ?)

Thank you
[Galaxy Note 8.0 (Tablet) General] Dexxmor:
You should get easily those screentime, i watched Dr Who the whole time. Use greenify etc

Gekritzelt von meinem Note 8
[Galaxy Note 8.0 (Tablet) General] AhmadLight:
My 2 months old N5110 can barely get 4 hours of screen time

I'm using 3 battery savers... Greenify, DS battery saver& Bataria

I also use titanium backup to freeze some of the bloatwares

As you can see in the pics, it's a normal usage.. (the first 2 pics)

Besides when I play subway, where is my water or asphalt 8, my battery drains insanely

But what I knew yesterday, is that I can get about 4 hours screen time while I'm at 1% !!!!!

So I thought I should calibrate my battery.. I did using Battery Calibration app, but no improvements till now

what should I do????
[Galaxy Note 8.0 (Tablet) General] bradipovsky:
I'll repost the sources I reported in the other thread:

This thread explains battery saving.

About Li-ion batteries in general there's this thread that contains a brief explanation and this entire website dedicated to them.

Now, as far as your problem is concerned:

- I personally think that battery saving apps are a waste, but that's because I like to apply any battery-saving tweak myself, I hate having anybody else doing it for me. Greenify is different, because it does one specific thing: hibernates apps. Anyway, keep in mind that it can actually drain the battery more, as explained in the first thread I linked.

- I could be wrong, but I know of no portable device, not even a brand new laptop, that can last more than 3 hours of playing games. I don't think that heavy gaming can be sustained for a long time: it involves 100% CPU, GPU and screen usage, and they drain battery and heat up the device, causing the battery to drain even faster.

- The four hours at 1% are strange... If I were you, I'd do some research in the website linked above or search for a battery recalibration guide... But that's because I don't believe in already made apps that are supposed to do magic :D

Good luck and let us know :)