Galaxy Tab 2 T519 WiFi and battery problems - Galaxy Tab S2 Q&A, Help & Troubleshooting

Hi,
I have 2 problems with my Galaxy Tab 2 which I hope I could somehow fix with a FW adjustment.
As with many others, the WiFi on my Samsung Galaxy Tab S2 no longer works properly and can no longer be switched on when the tablet is switched off and on again. If the tablet runs out because the battery has run out (0% battery), WiFi will work again after the restart.
In addition, the battery is drained very quickly. I even bought and installed a new battery for this. But I have the same problem there. Overnight, the battery tends to lose about 50% of its capacity even though the tablet is lying around in idle.
That is why I can only use the tablet when it is plugged in because the battery is constantly empty and I cannot switch it off because otherwise the WiFi will no longer work.
A hardware defect would behave differently, wouldn't it?
I tried:
Downloaded the last available FW version of the tablet from Samfirm.
I then correctly loaded the FW onto the tablet using Odin, Download Mode, etc. Unfortunately, it did not fix the problem and I still cannot activate the WLAN and the problems remain.
Edit. It's a SM T819. Sorry for the wrong title.

Related

[Q] Galaxy Note GT N7000 Battery Drain and Screen Flickering issues

Hi Guys,
I have bought my Galaxy note GT N7000 more than an year ago. I still consider myself as a newbie to android and I still have Gingerbread 2.3.6 on my GT N7000.
Everything was working fine until recently the battery was draining a bit more quickly than usual. Charging to 100% is also very fast taking only 45-60 mins. Normally it would take 2-3 hours previously. I observed this odd phenomenon only a month ago. It was the time when I download many GO Locker themes free using GETJAR. Please note that I downloaded many apps that GETJAR asked me download and I downloaded apps only from Playstore. It was also during this period that I put a Transcend Micro SDHC 16GB class 4 card into my GT N7000. I also have tried removing many apps that got via GETJAR but still the battery drain issue is present
Today I was hearing music and playing temple run, When the battery levels goes below 30%, the screen begins to flicker. However I ignored this and continued playing and the flickering frequency was increased and there was constant flickering when the charge was around 15% and finally when the charge was around 11% the phone was powered off automatically. Even I tried to power on, it would not come and then I have to remove the battery for a few min and placed it back and powered the device and only then it was powered on.
I'd appreciate, if anyone could let me know how to troubleshoot these issues. Please note that I don't want to factory reset my GT N7000 as I want to retain all my apps as well as Games data without rooting.
Regards,
K.Ramesh Karthik.
Your battery is dying buy a new one
Whiskeyjack4855 said:
Your battery is dying buy a new one
Click to expand...
Click to collapse
+Whiskeyjack4855 - Thanks for the reply. Are you sure about it? Because one of colleagues told me that it could be due to a huge number of app that I have installed on my phablet. Will the battery die within 2 years as I bought my phablet on Dec 2011?
Regards,
K.Ramesh Karthik.
Lot of issues on battery has bee reported after one year of usage.
Mine died after 14 months, the battery began to swell and during usage i think it heats up and comes away from the contacts.
A new battery completely fixed my problems so it should do for you too. Buy an official sammy one, it was only £8 in uk from amazon. Well worth it
same issue
Ramesh
I have the same issue , have aNov 2011 note 1 otherwise doing great but now the same problem. Did you change the battery and get a solution.
Kindly email me at [email protected]
Would appreciate it .
Regards
QUOTE=rameshkarthik;37999662]Hi Guys,
I have bought my Galaxy note GT N7000 more than an year ago. I still consider myself as a newbie to android and I still have Gingerbread 2.3.6 on my GT N7000.
Everything was working fine until recently the battery was draining a bit more quickly than usual. Charging to 100% is also very fast taking only 45-60 mins. Normally it would take 2-3 hours previously. I observed this odd phenomenon only a month ago. It was the time when I download many GO Locker themes free using GETJAR. Please note that I downloaded many apps that GETJAR asked me download and I downloaded apps only from Playstore. It was also during this period that I put a Transcend Micro SDHC 16GB class 4 card into my GT N7000. I also have tried removing many apps that got via GETJAR but still the battery drain issue is present
Today I was hearing music and playing temple run, When the battery levels goes below 30%, the screen begins to flicker. However I ignored this and continued playing and the flickering frequency was increased and there was constant flickering when the charge was around 15% and finally when the charge was around 11% the phone was powered off automatically. Even I tried to power on, it would not come and then I have to remove the battery for a few min and placed it back and powered the device and only then it was powered on.
I'd appreciate, if anyone could let me know how to troubleshoot these issues. Please note that I don't want to factory reset my GT N7000 as I want to retain all my apps as well as Games data without rooting.
Regards,
K.Ramesh Karthik.[/QUOTE]
Same problem after updating to JB official ROM
Hi,
I have the same problem after updating to JB official ROM. After the screen flickers, the phone turns off, and when I turn it on again, the battery level drops insanely. If turn on again, I have another battery level, until screen starts flickering again. This happens over and over again...
Once I plug it in, it starts behaving "normally" and after 2 or 3 hours, it starts this crazy cycle again.
This didn't happen before the update.
Any ideas?
wad214 said:
Ramesh
I have the same issue , have aNov 2011 note 1 otherwise doing great but now the same problem. Did you change the battery and get a solution.
Kindly email me at [email protected]
Would appreciate it .
Regards
QUOTE=rameshkarthik;37999662]Hi Guys,
I have bought my Galaxy note GT N7000 more than an year ago. I still consider myself as a newbie to android and I still have Gingerbread 2.3.6 on my GT N7000.
Everything was working fine until recently the battery was draining a bit more quickly than usual. Charging to 100% is also very fast taking only 45-60 mins. Normally it would take 2-3 hours previously. I observed this odd phenomenon only a month ago. It was the time when I download many GO Locker themes free using GETJAR. Please note that I downloaded many apps that GETJAR asked me download and I downloaded apps only from Playstore. It was also during this period that I put a Transcend Micro SDHC 16GB class 4 card into my GT N7000. I also have tried removing many apps that got via GETJAR but still the battery drain issue is present
Today I was hearing music and playing temple run, When the battery levels goes below 30%, the screen begins to flicker. However I ignored this and continued playing and the flickering frequency was increased and there was constant flickering when the charge was around 15% and finally when the charge was around 11% the phone was powered off automatically. Even I tried to power on, it would not come and then I have to remove the battery for a few min and placed it back and powered the device and only then it was powered on.
I'd appreciate, if anyone could let me know how to troubleshoot these issues. Please note that I don't want to factory reset my GT N7000 as I want to retain all my apps as well as Games data without rooting.
Regards,
K.Ramesh Karthik.
Click to expand...
Click to collapse
[/QUOTE]
rameshkarthik said:
Hi Guys,
I have bought my Galaxy note GT N7000 more than an year ago. I still consider myself as a newbie to android and I still have Gingerbread 2.3.6 on my GT N7000.
Everything was working fine until recently the battery was draining a bit more quickly than usual. Charging to 100% is also very fast taking only 45-60 mins. Normally it would take 2-3 hours previously. I observed this odd phenomenon only a month ago. It was the time when I download many GO Locker themes free using GETJAR. Please note that I downloaded many apps that GETJAR asked me download and I downloaded apps only from Playstore. It was also during this period that I put a Transcend Micro SDHC 16GB class 4 card into my GT N7000. I also have tried removing many apps that got via GETJAR but still the battery drain issue is present
Today I was hearing music and playing temple run, When the battery levels goes below 30%, the screen begins to flicker. However I ignored this and continued playing and the flickering frequency was increased and there was constant flickering when the charge was around 15% and finally when the charge was around 11% the phone was powered off automatically. Even I tried to power on, it would not come and then I have to remove the battery for a few min and placed it back and powered the device and only then it was powered on.
I'd appreciate, if anyone could let me know how to troubleshoot these issues. Please note that I don't want to factory reset my GT N7000 as I want to retain all my apps as well as Games data without rooting.
Regards,
K.Ramesh Karthik.
Click to expand...
Click to collapse
Need a new battery
nokiamodeln91 said:
Need a new battery
Click to expand...
Click to collapse
AMEN.
You can bet battery is guilty.
battery issue or charging circuit??
rameshkarthik said:
Hi Guys,
I have bought my Galaxy note GT N7000 more than an year ago. I still consider myself as a newbie to android and I still have Gingerbread 2.3.6 on my GT N7000.
Everything was working fine until recently the battery was draining a bit more quickly than usual. Charging to 100% is also very fast taking only 45-60 mins. Normally it would take 2-3 hours previously. I observed this odd phenomenon only a month ago. It was the time when I download many GO Locker themes free using GETJAR. Please note that I downloaded many apps that GETJAR asked me download and I downloaded apps only from Playstore. It was also during this period that I put a Transcend Micro SDHC 16GB class 4 card into my GT N7000. I also have tried removing many apps that got via GETJAR but still the battery drain issue is present
Today I was hearing music and playing temple run, When the battery levels goes below 30%, the screen begins to flicker. However I ignored this and continued playing and the flickering frequency was increased and there was constant flickering when the charge was around 15% and finally when the charge was around 11% the phone was powered off automatically. Even I tried to power on, it would not come and then I have to remove the battery for a few min and placed it back and powered the device and only then it was powered on.
I'd appreciate, if anyone could let me know how to troubleshoot these issues. Please note that I don't want to factory reset my GT N7000 as I want to retain all my apps as well as Games data without rooting.
Regards,
K.Ramesh Karthik.
Click to expand...
Click to collapse
Hi Ramesh,
Did you face any battery indicator issue like
1. The battery indicator flashes.
2. The battery indicator faulty indicates that its in charging mode.
prior to the screen flickering and forcefully switching off?.
Hi,
Im using stock ROM and ICS 4.04 OS.
just a week back i starting having issue with the faulty indicator, now the mobile turns ofw with flickering backilght when battery still shows 86%.
i think the circuitry of charging power circuit is screwed up?
has anyone come across this problem??
Battery drain n7000
I have same problem after i flash my N7000 with official Jelly Bean. Any solution? Please........
ferozhaniff said:
I have same problem after i flash my N7000 with official Jelly Bean. Any solution? Please........
Click to expand...
Click to collapse
This exact thing happened to me just recently (Note is from original release batch, so nearly 18-month-old battery) - replaced the battery with an official Samsung one off of Amazon UK and it stopped. Make sure you get one from a decent supplier, or the "fulfilled by Amazon" one: first time I got a dud battery that wouldn't even turn on.
My battery was bulging - it doesn't fit in the gap properly and the back cover has a bit of play that was never there before.
same here..
only yesterday...new battery..2 months old?
It happened with me even with ics, my phone came pre installed with. But flickering only happens when my battery reaches 1 percent. Usually 2-3 mins after it reaches 1 percent. And then soon the phone turns off. Basically it happens just a few seconds to a minute when the phone is about to turn off. Otherwise it doesn't happen. This is my 4th note. It never happened on my previous 3. Hope that helps.
Sent from my GT-N7000 using xda app-developers app
I'm having this same issue now... I've ordered a new battery from Amazon.... hope it solves the problem
If the battery drains like hell, and it's bulging, get a new battery. It solves the problem. I had this problem last week, and new battery got rid of it.
Me and my wife bought our notes at the sane time but her battery lasted a few months longer than mine did.
Seems like a new battery after a year or so it's inevitable.
Sent by Tapatalk from my Samsung Galaxy Note.
Same here battery 16 months old
Same here, my battery is 16 months old (now having a bulge too). Screen flickers @lower battery levels pretty much every time, though never when phone is connected to charger.
It seems Samsung Battery Life is less than Nokia
same issue exactly appeared after 17 months of buying.
I was charging the mobile via Car Charger which reduced the battery life.
after buying a new one, it worked OK but to be in safe side I upgraded OS to ICS.
It seems Samsung Battery Life is less than Nokia !!!!
The same problem
Actually i do have the same problem 5 days ago,mine is 15 months old Galaxy Note holding Jellybean 4.1.2 XXLT5 ofw . I asked help from specialist in mobile phones and he told me to change the battery immediately , so i asked for the battery (Original one from Samsung retailer) and it will be delivered for me this Monday. I'll keep you informed by details.
---------- Post added at 05:07 PM ---------- Previous post was at 05:03 PM ----------
I noticed also the flickering is accompanied by heat in the device processor , at the end of the discharging process (20 % 10% battery signal) or while surfing the 3G for longer time . sometimes it shut down suddenly

Extremely High Battery Drain on Gear SM-V700

Perhaps this will help someone else who has the same problem as me...I can not claim to have solved the problem myself. I got some wonderful information from this thread in the Gear 2 forum:
http://forum.xda-developers.com/showthread.php?t=2758364
So, if you're experiencing battery drain in excess of 15-20% per hour, that would pretty much make your device completely unusable as you'd drain the battery in about 5 hours as mine was doing. I tried everything, including even replacing my battery thinking it was a bad battery. To see if you're having the same issue, try disabling your Bluetooth connection on the Gear. If you notice you're battery doesn't drain nearly as quickly, you might have the same problem that I had. Here's how I fixed it...
I saw that according to the thread linked above, the problem is most likely the "goproviders" app. I tried clearing cache and clearing data through the "Application Manager" in settings on the Gear. That didn't help. I also investigated the "saproviders" app. Tried clearing cache and data in Application Manager as well. Nothing there either.
I went back into application manager and compeltely uninstalled both goproviders as well as saproviders. I did nothing else. The Gear Manager application notices that these applications are missing and will automatically re-download and re-install them. I'm guessing my original download must have somehow been corrupted. Once these new versions were downloaded and reinstalled, I rebooted my Gear and then re-enabled Bluetooth. Now, my mattery drain using the Tizen Mod 3.0 ROM is roughly 2% every 1.5 hours with bluetooth on, brightness set to 2, and motion enabled.
Just as an FYI, I know the linked thread addresses non-Samsung phones but this fixed my Gear's connectivity to my Note 2 using the SkyNoteAir G2 ROM.
I hope someone else finds this useful.
Galaxy Gear V700 + Samsung S4 i9505
I suffer from the same problem as you. Have you fixed it ?
Regards,
Darknessiv
Thanks. It's seems to work great for me
.
bzh_info said:
Thanks. It's seems to work great for me
.
Click to expand...
Click to collapse
I thought that fixed it for me at first, but it rather quickly went back to an 8% (or sometimes more) per hour battery drain. I tried all the other recommended fixes -- older versions of Gear Manager, wiping from Recovery, and various combinations, with no joy. Finally, after a few days of not using my Gear, I noticed several hours after turning it on one morning that it had never connected to my Note 4. Yet its battery life was still draining at 8% or so per hour. So, at least in my case, it doesn't appear to have anything to do with Gear Manager -- its either Tizen itself or (more likely) some preinstalled app that is sucking up the battery. I'm probably going to end up rooting Tizen and uninstalling a few things unless someone has a better idea. I can't imagine the stock Tizen install on a disconnected Gear would drain the battery like that, and not do it on everyone's, disconnected or no.
nobody has a battery monitoring application for Tizen? it would be a good thing ... I also tried everything and my gear starts to lose 9-10% per hour after a little while ... For info : I'm with a note 2 on DN4, it's was the same on 4.4.2...
I rooted and tried uninstalling a couple of things -- S Health, the pedometer. Same high rate of drain, and I can't think of any other app that might diminish battery life to this extent. I've now flashed the TizenMod 3.0 ROM, but I still have the same rate of drain (even though that ROM has a battery saving script built in).
So if it's not Gear Manager, and it's (apparently) not an app, it's probably something deeper because the only constant is the NF1 FW (the TizenMod ROM is based on that). I see from the samsung-updates.com firmware archive that there are a couple of newer FW versions -- NK1, released in November, and OA2, released last month. The available OA2 versions, however, are for Kazakhstan, Hungary, Germany, and Slovakia (plus the mysterious "SIO" region). Although I'm in the US, there's an NK1 version for the UK, so I'm going to try loading that and see what happens.
EDIT: updating to the NK1 version for the UK (which otherwise works fine) still results in high battery drain. At this point I'm wondering if Occam's Razor applies here -- maybe, at least in my case, it's just the battery itself.
FURTHER EDIT 2 days later: It's got to be the battery. I noticed that even when turned off, the battery is still draining. It comes off the charger at 100%, I don't turn it on, and less than an hour later it's at 91% -- without ever having been turned on.
YET FURTHER EDIT: It indeed was the battery. Replacing it brought new life to my Gear. Yay. Unfortunately, the battery cost $40 shipped (and required slightly more effort than, say, removing the back cover on a Note 4), but what are you going to do.
replacement battery
Hello,
were where you able to order a replacement battery. I have been unable to find one. Any help please and thank you.
JasW said:
I rooted and tried uninstalling a couple of things -- S Health, the pedometer. Same high rate of drain, and I can't think of any other app that might diminish battery life to this extent. I've now flashed the TizenMod 3.0 ROM, but I still have the same rate of drain (even though that ROM has a battery saving script built in).
So if it's not Gear Manager, and it's (apparently) not an app, it's probably something deeper because the only constant is the NF1 FW (the TizenMod ROM is based on that). I see from the samsung-updates.com firmware archive that there are a couple of newer FW versions -- NK1, released in November, and OA2, released last month. The available OA2 versions, however, are for Kazakhstan, Hungary, Germany, and Slovakia (plus the mysterious "SIO" region). Although I'm in the US, there's an NK1 version for the UK, so I'm going to try loading that and see what happens.
EDIT: updating to the NK1 version for the UK (which otherwise works fine) still results in high battery drain. At this point I'm wondering if Occam's Razor applies here -- maybe, at least in my case, it's just the battery itself.
FURTHER EDIT 2 days later: It's got to be the battery. I noticed that even when turned off, the battery is still draining. It comes off the charger at 100%, I don't turn it on, and less than an hour later it's at 91% -- without ever having been turned on.
YET FURTHER EDIT: It indeed was the battery. Replacing it brought new life to my Gear. Yay. Unfortunately, the battery cost $40 shipped (and required slightly more effort than, say, removing the back cover on a Note 4), but what are you going to do.[/QUOTE
Click to expand...
Click to collapse
Guys, I went to Vodafone store (they have Samsung service) and I complained there about battery life. They sent my watch for repair. 5 days later I got it with motherboard and battery replaced! No need to do it yourself. Watch has 2 years warranty.
Thanks Thanks Thanks
Same issue, same thing - it was the battery. Unfortunately, my battery had swollen up causing the watch to turn off every time i put it on my wrist. Opened it up to see if it was a bad connection, and found my battery had swolen up to nearly twice it's normal size. At least I got warning before it decided to vent with fire onto my wrist.
Found the battery via ebay, should be here in a few days. (here's the ebay item if anyone needs it: http://www.ebay.com/itm/331347265389 )
Galaxy Gear S battery drain
I was loosing 15% per hour on my Galaxy Gear S and for the life of couldn't figure it out. All the literature said it would last for 2 days. I even asked the tech guys at Best Buy. They couldn't help me. However, I think I have stumbled upon the answer. I typically dont have the GPS locator service on my samsung note 3 phone turned on. When its on, it drains my phone battery faster than usual. However, when I turn it on, my Galaxy Gear S Smart Watch battery improves dramatically. The phone battery went from losing 15% per hour to about 3 to 4 percent per hour.
jdenver130 said:
I was loosing 15% per hour on my Galaxy Gear S and for the life of couldn't figure it out. All the literature said it would last for 2 days. I even asked the tech guys at Best Buy. They couldn't help me. However, I think I have stumbled upon the answer. I typically dont have the GPS locator service on my samsung note 3 phone turned on. When its on, it drains my phone battery faster than usual. However, when I turn it on, my Galaxy Gear S Smart Watch battery improves dramatically. The phone battery went from losing 15% per hour to about 3 to 4 percent per hour.
Click to expand...
Click to collapse
Was having similar issues. Noticed that my screen was separating from the metal bezel and decided to open it up. The battery was swolen, good thing it didn't catch fire on my arm.
hurdlejade said:
Guys, I went to Vodafone store (they have Samsung service) and I complained there about battery life. They sent my watch for repair. 5 days later I got it with motherboard and battery replaced! No need to do it yourself. Watch has 2 years warranty.
Click to expand...
Click to collapse
I went to Sonera (Finnish carrier) store few months ago when the battery life of my Gear dropped to around 17 hours even when turned off and they said that the warranty for the battery is 6 months so I would have to pay to have it changed. Preordered Gear S2 the same day but I'm still waiting for it

Bluetooth battery drain

I'm having an issue with my Galaxy Tab S2 (Nougat 7.0, international unlocked T710 Snapdragon) when using any bluetooth device with it. The battery drains like hell. After a two or three hours of using a bluetooth keyboard, bluetooth is the main cultprit of battery usage. I don't know what to do - I wiped the cache partition, did a factory reset. Nothing helped.
Otherwise, the battery life is great, but as soon as I connect it with a BT device I can see it dropping. Everytime I click on Bluetooth in Battery settings I can see there's more mAh used...
I would appreciate any help.
Nougat.. thus better downgrade to MM or Lollipop.
Dear all,
I Have same bug with My SMT-813 since update Nougat, When I use with skeaper bluetooth.
Do you have found a solution?
Did you factory reset after OS update?
Niii4 said:
Did you factory reset after OS update?
Click to expand...
Click to collapse
Dear,
Yes, all reset.
I think it's Nougat because with android 6.01 all is ok.
So better downgrade back to 6.0.1 then.
hdloulouhd said:
I think it's Nougat because with android 6.01 all is ok.
Click to expand...
Click to collapse
Yes, it's happening since the Nougat update. I've already filed a bug report for it but got no answer from Samsung till today.
The only thing you can do about it is to turn it off. And if you need it you have to downgrade to MM.
Same here on t819, but its kind of fake data, in my opinion there is somrthing wrong in calculating mah consumption. My battery still lasts the same, even when using or not using bt, but it has a lot of bugs, like forgetting paired devices or failing to pair. Everything about bluetooth is not perfect on N
Hi All
Do you have news about this bug?
Workaround
I've had the same battery drain issue on my S2 since upgrading to Nougat. Yesterday however I found I could 'fool' the system by turning on Flight Mode and then turning BT and WiFi back on - Consumption back to normal! It looks weird having Flight Mode on at the same time as BT & WiFi but it seems to work.
Update
I’ve just been trying to repeat my observations and the results are a little ‘challenging’
I saw a comment in another forum where someone suggested that the discharge effect is really a false positive caused by a faulty battery monitor in the Samsung software. So a downloaded a third party battery monitor, I charged my tablet to 100% , turned off flight mode and turned on both WiFi and Bluetooth.
The main observation is that the battery was not discharging rapidly – previously you could virtually watch the percentage on the battery meter decreasing in real time. After using the tablet for a day or so for browsing and watching some short videos I compared the two battery monitors – the Samsung monitor showed the battery down to 40% - but ascribed virtually all of the use to Bluetooth! The third party monitor showed a sensible mix: mostly browser and video player with small values for other programs.
I conclude therefore that the Samsung battery meter is definitely very broken.
As far as my earlier observed battery drain is concerned there seem to be two possibilities:
1) It was truly the Bluetooth causing the drain and switching to flight mode has cleared it (unlikely in my view)
2) The drain was caused by something else but was displayed by the battery meter as Bluetooth, and when I switched to Flight Mode it stopped - either by coincidence or because the Flight Mode really stopped the drain.
Number 2 seems to me the most likely explanation. I have noticed that all of my Android devices exhibit anomalous battery drain about once a month, and a functioning battery meter shows this as Android System usage. I don’t know what it is doing but my best guess it is some sort of file scan/verification (or maybe just harvesting data!). After a system upgrade it would be quite plausible that Android wants to scan the new installation.
I have, in the past, stopped this Android process by rebooting a device, so it is not impossible that entering Flight mode has had a similar effect.
For the moment my S2 seems to be using a sensible amount of power – both with and without Flight Mode - albeit with useless reporting of the details by the Samsung monitor.

Battery drain after Android 9 update

My phone got the update to Android 9 a little over a week ago, and since then it has been losing battery like crazy. For example, last night I left it unplugged as a test, and it lost 30-40% of battery within 6 hours (while I was sleeping). Before the update, a fully charged battery was able to last for two days, now it doesn't even manage one. The phone is often noticeably warm.
I restricted all "consuming apps" some days ago, that did not make any difference. I also tried 3rd-party apps to analyze the battery consumption, but did not find any way to figure out what consumes all the battery in the background / while the screen is off.
Using Google I found other people with the same problem, but I did not find a solution. What can I do?
I had a same kind of problem but it started a few days after a manual update flash. I had been experimenting with some root stuff (mostly magisk though so they should go away by uninstalling the modules) but could also not figure out the reason for the drain.
I also tried to reflash only system and vendor partitions, but ended with a bootloop, so I had to flash the whole firmware again. No problems after that.
I would try a factory reset if I were you.
You can also try GSam battery monitor (if you already haven't) to figure out what's happening with your phone while the screen is off and it should be sleeping.
I upgrade the XPZ yesterday to 4.41 Pie. Charge the mobile after upgrade to 100%.
The current situation looks like:
18hour active, 30 Min Display, a few calls... Whatsall, newsletter, Mail..... are running in the Background, LTE, EDGE and WiFi are always on, BT has a connection to my watch...
88% are still in the Accu. (Save mobil datatransfer is aktiv; additional the option is enabled to reduce power consumption for apps in background)

Terrible battery life. Rooting/flashing a new ROM might help?

I have a T817T (T-Mobile Tab S2 9.7") that gets about 20 hours of battery life with the screen off and nothing running. Bluetooth, and location are off. Airplane mode enabled to try and prevent it from search for a mobile network. Wifi on and connected though. AccuBattery is show a screen-off discharge speed of 238.5mA.
I have another Tab S2 that is a 8.0" wifi only that will last nearly a week with screen off an no use. This one shows a screen off discharge of 12.0mA.
Of course, the larger tablet screen would be expected to draw more, but a difference of 20x with the display off is excessive.
I don't have any mobile data service plan on the 9.7. Could this be causing it somehow? Like if the tablet is constantly trying to connect to a mobile network? If so, is there a way to disable that? I was wondering if rooting/flashing a custom ROM might be able to help me identify and fix whatever is draining the battery so much. I haven't rooted anything since probably 2011 or 2012 though, so I'm basically going to have to relearn how to do everything.

Categories

Resources