Develop Bugs

[Q] weird issue with battery

my phone is ARC S
most of times when battery percent is about %40 suddenly the low battery message appear and show %1 and phone shut down .
i'm sure it's not %0 battery problem (double checked with log and this forum guys!)
and tried most of roms and kernels and no different .
is it from battery and shoud i change it ?

try this battery calibration app. if still same problem occurs, maybe it's really the battery itself got problem.
I personally always do calibration of battery whenever I switched ROM.

Rycon33 said:
try this battery calibration app. if still same problem occurs, maybe it's really the battery itself got problem.
I personally always do calibration of battery whenever I switched ROM.
Click to expand...
Click to collapse
thanks but tried this before and no different .
i think i need a new battery !

prance666 said:
thanks but tried this before and no different .
i think i need a new battery !
Click to expand...
Click to collapse
I think so too.
Battery calibration apps offer a satisfying placebo effect on battery life.
But when battery acts this weird, you need something more than a placebo.
First you do a Repair with SEUS and if the problem persists, it's most probably hardware related.
If one of your friends has an Arc, you can exchange batteries for a day, to make sure that your battery is actually faulty before buying a new one.
Last but not least, if you do buy a new battery, it'd better be an original one.
Don't trust cheap eBay knockoffs!
Good luck!

Had that once, charging it fixed it
Sent from my iPad 2 using Tapatalk

Flo95 said:
Had that once, charging it fixed it
Click to expand...
Click to collapse
do you mean changed it ?

No, I came home and charged it and never had the problem again.
But mine dropped from ~40% to 29% not to 0% like yours did.
Sent from my iPad 2 using Tapatalk

How can you troubleshoot certain parts of your phone?

Hi All,
So recently I have been having problems with my battery life. It's not lasting as long as it should. However, I do not know whether or not its my data cable, the device that plugs into the wall, my battery, or the charging port in my phone.
I got my phone from best buy, but it was more than 30 days ago, and I have no insurance on it, so I cannot get a replacement without sending it away for at least $100.
Any tips?

Well what battery life are you getting? Get into the Phone settings and then battery settings and post a snapshot of the graph here. Additionally you can also install Batterystat it will give you a full analysis of what's using up your battery power.
Sent from the Rabbit Hole

bushako said:
Well what battery life are you getting? Get into the Phone settings and then battery settings and post a snapshot of the graph here. Additionally you can also install Batterystat it will give you a full analysis of what's using up your battery power.
Sent from the Rabbit Hole
Click to expand...
Click to collapse
I think I may have narrowed it down to the battery itself? I have some battery apps that tell me the health is "good," but what does that really mean? My charging cable is iffy, because sometimes it works perfectly, charging to 100 just fine. However, other times it charges 20 percent in 9 hours. When I used my friend's Note II charger, it worked perfectly every-time. But the fact of the matter is, when my phone does charge to 100 from my cable, I still get not the best battery life, which leads me to believe it's my battery's fault. I am going to test out charging my phone to 100% with my friend's cable tonight, and see what happens tomorrow. I will also get batterystat and report back.
Also, this may be important. When I first got my phone, battery life was AMAZING, really quite astounding. It's just kind of dropped down, like a slope. Not a sudden, dramatic drop, but incrementally.
As for the battery info below, here is what went on today. I unplugged my phone from 100% at around 7am. It is now 6pm. Today, my phone was barely used, just sitting in my pocket with wi-fi on. When I did use it, I sent two very quick emails, played scramble with friends for about 45 minutes total, took a few photos, listened to music from the music player for about 15 minutes, and that is really all I did. I feel that my percentage should be much higher than what it is listed as.

Here's mine as you can see I'm getting almost twice your battery life. I have a few apps that i use everyday which are basically whatsapp, xda, chrome. I don't have many apps that would wake the phone constantly and if there is then I disable them from starting up when the phone is not in use. The best tool you can use for something like this would be rom toolbox pro. It's multiple system tools in one and it works great. I'm currently on Omega V10 with perseus kernel. Also I don't connect to wifi much and network here is weak and on 2G but even though I still get this battery life. In areas with good signal I get more battery life. Also I've dropped my phone twice with impact points on the corner, and just minor scuffs but that didn't effect the phones performance or battery life so I doubt it has affected yours.
Sent from the Rabbit Hole

Also I've overclocked, my processor to 1.8ghz and undervolted between - 50 and -100. So i get minimal power wastage from heat build up. Also you can set a black wall paper with a dark theme.
Sent from the Rabbit Hole

bushako said:
Also I've overclocked, my processor to 1.8ghz and undervolted between - 50 and -100. So i get minimal power wastage from heat build up. Also you can set a black wall paper with a dark theme.
Sent from the Rabbit Hole
Click to expand...
Click to collapse
Unfortunately, I am not rooted, and haven't planned on doing so ever. Is there anything else I can do to fix my problem? I did download batterystats, and am waiting a few days though to see what it tells me.
Also, I used a different charger just to see what would happen today, and even though its been off the charger for 2 hours, it's already down to 94 percent. So I am thinking that there is either something wrong with the battery, the charging port, or could there be a bug in the phone's software?
I am thinking of getting a new battery, and seeing if that fixes my problem. I'm just so irritated because battery life used to be amazing, and I don't know what happened.

Maybe try a factory reset. Maybe something else has been using your battery.
Sent from my GT-N7100 using xda app-developers app

UtkarshGupta said:
Maybe try a factory reset. Maybe something else has been using your battery.
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
That's what I was thinking. I will probably do that and report back, before going out and buying a battery or something. Is it possible that, although not reported in the battery info, that an app could be rogue or something or taking up battery? I don't want to do a factory reset and redownload a bad app.

Update: I tried a factory reset. It seems to either be worse or just the same. It's been an hour and has dropped to 97 percent, but I have made a couple of phone calls. But compared to before I did a factory reset, it dropped to 96 percent in two hours while not doing anything.

Keep your phone on charging over night.
Then let it drain to zero no matter what.
Do this 3 to 4 times and then
Leave it for charging overnight.
Then while it is already charging use battery calibration.
Sent from my GT-N7100 using xda app-developers app

UtkarshGupta said:
Keep your phone on charging over night.
Then let it drain to zero no matter what.
Do this 3 to 4 times and then
Leave it for charging overnight.
Then while it is already charging use battery calibration.
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
Quick Update:
I did another factory reset after I said the initial one didn't help. It looks like it may have helped, although I still have not gotten the battery life I used to have.
I found an application here called betterybatterystats, and have downloaded that. I will use my phone throughout today, and will post sceenshots.
If need be, I will take your advice about charging and draining and charging, and then do the battery calibration.

Here are my most reset battery stats. Screenshots are from the battery setting area, and betterbatterystats
Maybe I am just being paranoid and nothing is wrong? I can't make any sense out of these readings, but I hope someone else can.

first of all change you cable if you are having that kind of issues. Mine in my galaxy ace was having that problem, it was like connect/disconnect without any reason and it didnt charged my phone at all. I noticed it when it was too late, the continous on/off kill my battery. When I say kill i mean it just lasts 15 min in 3g with screen on and it happened to me in 2 official batteries.
good luck!
Enviat des del meu GT-N7100

[Q] Short battery life

I've had my Galaxy W for just over a year. Whilst I was running the stock ROM I would more or less get a full day out of the battery. I upgraded rooted my device and installed the Cyanogen CM9 rc2 ROM. I don't recall any battery problems at first, but just over a week ago it started draining within five or six hours. This happened every day for a week.
Since then I have uninstaleld all apps (apart from Google Authenticator which I couldn't manage without), turned off wifi, bluetooth and everything else I could think of. Now I seem to be getting about 36 hours out of the battery... Although I think it goes from 35% down to 10% very, very quickly.
Leaving all data connections off and having no apps is okay in the short term, but is there a long term software solution?

creative-2008 said:
I've had my Galaxy W for just over a year. Whilst I was running the stock ROM I would more or less get a full day out of the battery. I upgraded rooted my device and installed the Cyanogen CM9 rc2 ROM. I don't recall any battery problems at first, but just over a week ago it started draining within five or six hours. This happened every day for a week.
Since then I have uninstaleld all apps (apart from Google Authenticator which I couldn't manage without), turned off wifi, bluetooth and everything else I could think of. Now I seem to be getting about 36 hours out of the battery... Although I think it goes from 35% down to 10% very, very quickly.
Leaving all data connections off and having no apps is okay in the short term, but is there a long term software solution?
Click to expand...
Click to collapse
after your install your rom,do you already callibrate battery your phone??
Sent from my GT-I8150 using xda premium

fixero said:
after your install your rom,do you already callibrate battery your phone??
Sent from my GT-I8150 using xda premium
Click to expand...
Click to collapse
Not immediately, but about a week later. Is it worth going through that process again?
Edit:
This is the app that I used:
https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en

Before I uninstalled any apps I downloaded and installed CPU Spy. Here are two screenshots taken with CPU spy.
I could reinstall it now without any other apps installed, if that will help?
I don't know enough about this, but I expected that the phone would spend a higher percentage of it's time in 'deep sleep' than that.

creative-2008 said:
Before I uninstalled any apps I downloaded and installed CPU Spy. Here are two screenshots taken with CPU spy.
I could reinstall it now without any other apps installed, if that will help?
I don't know enough about this, but I expected that the phone would spend a higher percentage of it's time in 'deep sleep' than that.
Click to expand...
Click to collapse
That should have been right. I don't know what is happening with your deep sleep, although your phone is on for 16 hrs but the deep sleep only reach not almost half of it. Did you use your phone often?
Sent From Viperized Sensation Z715e

reddvilzz said:
That should have been right. I don't know what is happening with your deep sleep, although your phone is on for 16 hrs but the deep sleep only reach not almost half of it. Did you use your phone often?
Sent From Viperized Sensation Z715e
Click to expand...
Click to collapse
On the occasions shown, I used it some, but not a lot. There have been occasions where the battery has gone from full to flat in five hours, with the phone only being used for 5 minutes.

creative-2008 said:
On the occasions shown, I used it some, but not a lot. There have been occasions where the battery has gone from full to flat in five hours, with the phone only being used for 5 minutes.
Click to expand...
Click to collapse
Interesting.. how about you check on the battery is it bloating or not?
For battery problem is either the phone calibrated wrong readings on the battery or the battery it self is the problem.
If you use your phone not too often but the deep sleep only reach 34% of the time then some apps is preventing the deep sleep, try to check what apps is that causes that with some battery stats app, try search it in xda or market
Sent From Viperized Sensation Z715e

reddvilzz said:
Interesting.. how about you check on the battery is it bloating or not?
For battery problem is either the phone calibrated wrong readings on the battery or the battery it self is the problem.
If you use your phone not too often but the deep sleep only reach 34% of the time then some apps is preventing the deep sleep, try to check what apps is that causes that with some battery stats app, try search it in xda or market
Sent From Viperized Sensation Z715e
Click to expand...
Click to collapse
I've gone for Battery Stats Plus. I'll reenable wifi, bluetooth and 3G for a few days and see what happens. If that takes a toll on the battery I will post back with details from Battery Stats Plus.
I will also take the battery out later to inspect it.
Update:
My battery had 15-20% remaining and I turned it off, and tried to turn it back on. It now thinks that it does not have enough power to boot the phone. I don't know if that new information is helpful or not.

creative-2008 said:
I've gone for Battery Stats Plus. I'll reenable wifi, bluetooth and 3G for a few days and see what happens. If that takes a toll on the battery I will post back with details from Battery Stats Plus.
I will also take the battery out later to inspect it.
Update:
My battery had 15-20% remaining and I turned it off, and tried to turn it back on. It now thinks that it does not have enough power to boot the phone. I don't know if that new information is helpful or not.
Click to expand...
Click to collapse
With 15 - 20% it should have boot, because it still have juice left. What about your battery physics? Is it bloating or just normal?
Sent From Viperized Sensation Z715e

;D

Took the battery out this morning for a proper look. There's definitely some bloating. Time to get looking for a replacement battery?
Could there be two issues here? As from the screenshots I posted the phone doesn't seem to have spent a lot of time in deep sleep.

I was just watching a YouTube video, with about 70% battery. The phone turned off, and when I've turned it back on it's gone down to 2%.
Could this be down to an improperly calibrated battery, or is it purely down to the physical damage/bloating to the battery?

creative-2008 said:
I was just watching a YouTube video, with about 70% battery. The phone turned off, and when I've turned it back on it's gone down to 2%.
Could this be down to an improperly calibrated battery, or is it purely down to the physical damage/bloating to the battery?
Click to expand...
Click to collapse
most probably you suffer wrong calibrated battery problem , I think
sorry I didnt see your first post (about bloating) :/ , definetely you should buy a new battery

Thanks for your advice.
I'm going to install Battery Calibration by Nema from Google Play. I'll see how I get on with that.
I'm going to order a replacement battery this week. I'm looking for a direct replacement, with an official Samsung battery. I have posted here in the Accessories forum. I hope that was the right place to put it.

After I install the CM10 alpha 6 conform to the first post, the battery life of my cellphone has been drained very fast - 21% about 6 hours and half.
Can anyone help me, please? I already did the battery calibration and I can't see effects. I'm wondering if is better install CM 9 or just go back to the android 2.3.6 factory version of my cellphone.

creative-2008 said:
Took the battery out this morning for a proper look. There's definitely some bloating. Time to get looking for a replacement battery?
Could there be two issues here? As from the screenshots I posted the phone doesn't seem to have spent a lot of time in deep sleep.
Click to expand...
Click to collapse
Your battery is bloated? Then you *must* replace it. Period.
A damaged battery is the root cause of myriads of problems. Until that battery is replaced, you _will_ experience all kinds of annoyances, no matter what ROM/Kernel you're using, including inexplicable battery drain.
Sent from my GT-I8150 using xda app-developers app

elgleidson said:
After I install the CM10 alpha 6 conform to the first post, the battery life of my cellphone has been drained very fast - 21% about 6 hours and half.
Can anyone help me, please? I already did the battery calibration and I can't see effects. I'm wondering if is better install CM 9 or just go back to the android 2.3.6 factory version of my cellphone.
Click to expand...
Click to collapse
Two more pictures from today, after my third battery recharge.
What do you guys recommend?

elgleidson said:
Two more pictures from today, after my third battery recharge.
What do you guys recommend?
Click to expand...
Click to collapse
How old is your battery?
Sent from my GT-I8150 using xda app-developers app

pepoluan said:
How old is your battery?
Sent from my GT-I8150 using xda app-developers app
Click to expand...
Click to collapse
My cellphone is 1 year and half old. On android factory version the battery last for about 30 hours. In CM10 the battery don't last more than 12 hours.

elgleidson said:
My cellphone is 1 year and half old. On android factory version the battery last for about 30 hours. In CM10 the battery don't last more than 12 hours.
Click to expand...
Click to collapse
Time to replace your battery.
Sent from my GT-I8150 using xda app-developers app

Low precantages of battery last much longer (without power saver)

I've searched the internet for that problem and found nothing so I'm trying my luck here.
My battery precantages is not linear at all.
When I'm discharging the phone from 100% to 0% the precantages drop really quickly until 5%-9% (Disabled battery saver when cross 15% of course) and then the precatnges seems to stop draining and every precantage last longer and longer until it gets to 0%.
From 100% to 0% I've got 2:45 screen time in my last test but between 100% to 5% it was only 2:15 screen time!
Meaning that every precent lower than 5% last 6 mins vs. every precent above 5% last 1.35 mins.
It's very annoying and happened to me also on unrooted ICS and then on unrooted JB and also on every rom-kernel combination I ever tried after I rooted my phone. (ARHD, OrDroid, Maximus, CM10.1, Renovate + NCX, XM, Komzik and stock of course).
Do you think its a hardware issue? Do I need to replace the battery? Or it's a common problem of HTC One X?

It's not a problem, it's a feature.
Why does it irritate you?
Sent from my IceCold One X

TToivanen said:
It's not a problem, it's a feature.
Why does it irritate you?
Sent from my IceCold One X
Click to expand...
Click to collapse
How's that a feature if power saver is off? Don't get the idea. I prefer that every precent will be equal. It decreases screen time alot if you don't reach the last precents. By half an hour! That's absurd.
Every precent can be 1.65 mins of screen time and by the time I will reach 10% I will have 2:28 screen time instead of just 2:10.
If it's really a feature so it's a bad one, How I can disable it?

If you have recovery installed try to wipe battery stats. then do a full discharge then full charge with out using it. Worked for me. had a similiar problem once

Dizy801 said:
If you have recovery installed try to wipe battery stats. then do a full discharge then full charge with out using it. Worked for me. had a similiar problem once
Click to expand...
Click to collapse
TWRP doesn't have a battery stat wipe option.
There is another way to do that without installing another recovery?

tal_sarid said:
TWRP doesn't have a battery stat wipe option.
There is another way to do that without installing another recovery?
Click to expand...
Click to collapse
The file is deleted when the phone is charged.
The file has nothing to do with the displayed battery percentage remaining.
Deleting the file manually is a pointless thing to do.

BenPope said:
The file is deleted when the phone is charged.
The file has nothing to do with the displayed battery percentage remaining.
Deleting the file manually is a pointless thing to do.
Click to expand...
Click to collapse
So if it has nothing to do with my problem what does? I already installed various of roms with various of kernels and the problem persists. I have already full wiped everthing for too many times. Maybe it is an hardware fault of the battery indicator or somthing like that?

A ROM or kernel won't change it, the battery itself indicates what's remaining. I guess the lookup table or whatever is not well calibrated for the cells in your battery.
Get over it, it's not a big deal, you can't fix it other than replacing the battery, but that's not guaranteed.

To me, any HTC One X that lasts about 6 hours with 3 hours of maximum screen time has a hardware issue.
I have similar problem ever since I bought the phone last May.
Just by looking at http://forum.xda-developers.com/showthread.php?t=2156311 makes me wonder what the hell is wrong with the phone itself.

limzm said:
To me, any HTC One X that lasts about 6 hours with 3 hours of maximum screen time has a hardware issue.
I have similar problem ever since I bought the phone last May.
Just by looking at http://forum.xda-developers.com/showthread.php?t=2156311 makes me wonder what the hell is wrong with the phone itself.
Click to expand...
Click to collapse
So most of the One X's that I know are borken. I know 6 people that never pass 3hr screen time with their phone. and in XDA I see 7hr screen time and can't believe it, even if I turn off all the sensors like GPS, Bluetooth when not needed it's not helping me to pass the 3hr...

tal_sarid said:
So most of the One X's that I know are borken. I know 6 people that never pass 3hr screen time with their phone. and in XDA I see 7hr screen time and can't believe it, even if I turn off all the sensors like GPS, Bluetooth when not needed it's not helping me to pass the 3hr...
Click to expand...
Click to collapse
Yup! Turning off all sensors, GPS, data doesn't help.
When one turn off the screen at eg. 70% then turning back the screen on after an hour of sleep time, it will drop to 65% or worse. Always made me mad when that happens.
Even any battery saving guides like getting rid of wakelocks doesn't help.

I usually get 5 hr screen time but depends a lot on what you do. 3G data drains battery faster than WiFi, GPS doesn't drain battery unless an app uses it, etc.

[Q] Rapid Battery Loss & Rebooting Restores Battery?

So, my battery is wack... and I think it's only been acting like this since I went to a KK ROM? Maybe? Feels like it...
I've had this tablet since it was released last fall, and this behavior is very recent.
Anyways, it dies FAST. Like nose dives in a matter of 5-15 minutes. What's even weirder, is that sometimes, if I power cycle the device, it'll jump up by 30-60%. But then just dies again in another 5-15 minutes.
And there's a screenshot after I just power-cycled.
It jumped from 11% to 71%!!
Crazy!
I've also tried letting it get to 5% then charging it to 100%, done that twice. No luck. I don't know if this is related, but if I power it completely off, and plug it in, it turns on... kinda weird. My Note 3 doesn't do that, it just stays off and shows the battery charge indicator.

NaxIonz said:
So, my battery is wack... and I think it's only been acting like this since I went to a KK ROM? Maybe? Feels like it...
I've had this tablet since it was released last fall, and this behavior is very recent.
Anyways, it dies FAST. Like nose dives in a matter of 5-15 minutes. What's even weirder, is that sometimes, if I power cycle the device, it'll jump up by 30-60%. But then just dies again in another 5-15 minutes.
And there's a screenshot after I just power-cycled.
It jumped from 11% to 71%!!
Crazy!
I've also tried letting it get to 5% then charging it to 100%, done that twice. No luck. I don't know if this is related, but if I power it completely off, and plug it in, it turns on... kinda weird. My Note 3 doesn't do that, it just stays off and shows the battery charge indicator.
Click to expand...
Click to collapse
Hi, I have similar problem and I am with 4.3 android. I have battery loss when I play games. It drops to 2-3% really fast and after reboot it goes up to 35-40%. Once I fully depleted my battery and charge it. This time there were no battery lost. After the second charging problem persists.
If you manage to fixed it please tell us how.

Rupar4o said:
Hi, I have similar problem and I am with 4.3 android. I have battery loss when I play games. It drops to 2-3% really fast and after reboot it goes up to 35-40%. Once I fully depleted my battery and charge it. This time there were no battery lost. After the second charging problem persists.
If you manage to fixed it please tell us how.
Click to expand...
Click to collapse
No fix yet... still looking for a solution

NaxIonz said:
No fix yet... still looking for a solution
Click to expand...
Click to collapse
In other thread one guy says that he has the same problem and he just go to the store and they change his battery.

Rupar4o said:
In other thread one guy says that he has the same problem and he just go to the store and they change his battery.
Click to expand...
Click to collapse
Well, I doubt that I can do that since I have a Custom ROM on my tablet
Sent from my SM-P600 using XDA Premium 4 mobile app

same here
I have a similar problem with my p600. the tablet is new, got it since a month or less.
at first i was amazed of the battery life i use it a lot for work writing documents and sheets on excel, battery used to perfom quite well giving me more than 5 hours of screen on, but recently the battery starts to drop very fast, now i can barely get around 2 hours of screen on.
i've already done 2 cycles of full discharge and then charge it completely with the tablet turned off. but the problem stills.
also sometimes when i reboot the tablet the battery goes from i.e 20% to 40% after the reboot.
im still looking for a fix or solution, today i found a new official firmware for my model (4.4 firmware for telcel mexico). going to wait until the tablet is fully charged and then flash the new firmware. I dont know if its going to help but i got nothing to lose.
by the way, sending it to semsung is not an option because of knox 0x1

vashminted said:
I have a similar problem with my p600. the tablet is new, got it since a month or less.
at first i was amazed of the battery life i use it a lot for work writing documents and sheets on excel, battery used to perfom quite well giving me more than 5 hours of screen on, but recently the battery starts to drop very fast, now i can barely get around 2 hours of screen on.
i've already done 2 cycles of full discharge and then charge it completely with the tablet turned off. but the problem stills.
also sometimes when i reboot the tablet the battery goes from i.e 20% to 40% after the reboot.
im still looking for a fix or solution, today i found a new official firmware for my model (4.4 firmware for telcel mexico). going to wait until the tablet is fully charged and then flash the new firmware. I dont know if its going to help but i got nothing to lose.
by the way, sending it to semsung is not an option because of knox 0x1
Click to expand...
Click to collapse
sorry to revive an old thread. I have this exact issue! it's driving me bonkers! Any fixes?

brett_day said:
sorry to revive an old thread. I have this exact issue! it's driving me bonkers! Any fixes?
Click to expand...
Click to collapse
try this, bring life back to battery. If you use the trial version, keep exit and redo it until all cells are done.
https://play.google.com/store/apps/details?id=com.BoshBashStudios.batterydoctorrepair

buhohitr said:
try this, bring life back to battery. If you use the trial version, keep exit and redo it until all cells are done.
https://play.google.com/store/apps/details?id=com.BoshBashStudios.batterydoctorrepair
Click to expand...
Click to collapse
perfect thanks. I will def give this a try.

brett_day said:
perfect thanks. I will def give this a try.
Click to expand...
Click to collapse
I
Well unfortunately this has not worked....battery is still tanking. last night i played plague for 30 minutes....in 30 mins battery went from 90% to 25%. I think i will try reflashing KitKat....maybe my original update was screwy. If that does not fix it then I guess I will have to call Sammy.

Man i ha e exactly the same problem. I calibrated it some months ago and it seemed to work fine. Now the problem is back.... Dont know what to do... I have tried several apps, though i read google doesn't recomend to use any app to fix the battery... we really need help here
Sent from my SM-P600 using XDA Free mobile app
---------- Post added at 08:13 AM ---------- Previous post was at 08:12 AM ----------
vashminted said:
I have a similar problem with my p600. the tablet is new, got it since a month or less.
at first i was amazed of the battery life i use it a lot for work writing documents and sheets on excel, battery used to perfom quite well giving me more than 5 hours of screen on, but recently the battery starts to drop very fast, now i can barely get around 2 hours of screen on.
i've already done 2 cycles of full discharge and then charge it completely with the tablet turned off. but the problem stills.
also sometimes when i reboot the tablet the battery goes from i.e 20% to 40% after the reboot.
im still looking for a fix or solution, today i found a new official firmware for my model (4.4 firmware for telcel mexico). going to wait until the tablet is fully charged and then flash the new firmware. I dont know if its going to help but i got nothing to lose.
by the way, sending it to semsung is not an option because of knox 0x1
Click to expand...
Click to collapse
Bumping up I have the same exact problem... any fixes?
Sent from my SM-P600 using XDA Free mobile app

Sorry to bump this, has anyone found a solution yet.
I've replaced the battery 3 times in about 9 months, but had this issue about a yr, was sent back to Samsung who changed the battery and supposedly updated the fw 4.4.2, I have since replaced the battery another 3 times every 3 months, each time either factory resetting or flashing a new rom, currently on official Smp600 5.1.1 BTU rom, today my battery was on 47%, I plugged in charger and was watching/streaming a movie on it, about 80 minutes later the tablet shut off, which was odd it's never powered off while on charge, powered it back on and battery said 19%, my previous issues has been the same as others, it can be on 100%, play a game, or stream a movie,or watch youtube etc and it will nosedive dramatically 20/30% at a time, sometimes within 10 mins it's gone from 100% to less than 30%, it's clear there's some sort of issue if others have it, I was wondering if a thread should be made to list ppl with this issue to see how many there are and go from there.

reeps said:
Sorry to bump this, has anyone found a solution yet.
I've replaced the battery 3 times in about 9 months, but had this issue about a yr, was sent back to Samsung who changed the battery and supposedly updated the fw 4.4.2, I have since replaced the battery another 3 times every 3 months, each time either factory resetting or flashing a new rom, currently on official Smp600 5.1.1 BTU rom, today my battery was on 47%, I plugged in charger and was watching/streaming a movie on it, about 80 minutes later the tablet shut off, which was odd it's never powered off while on charge, powered it back on and battery said 19%, my previous issues has been the same as others, it can be on 100%, play a game, or stream a movie,or watch youtube etc and it will nosedive dramatically 20/30% at a time, sometimes within 10 mins it's gone from 100% to less than 30%, it's clear there's some sort of issue if others have it, I was wondering if a thread should be made to list ppl with this issue to see how many there are and go from there.
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I've been having the same issue for some time now. Calibrating the battery does help, I don't experience the problem nearly as much after calibrating it. But it'll still nosedive on occasion, maybe once a week. This is the app I use to calibrate it https://play.google.com/store/apps/details?id=com.nema.batterycalibration