Develop Bugs

Extreme Charging time on wall charger - only 40% in 7 hours

Thanks for taking the time...
My Note 8 3g is showing a strange behaviour as of late.
I leave it plugged in the original wallcharger from Samsung, switched on/ 3G active.
Plugging in at roughly 10% that would give me 50-60% in the morning after 7-8 hours.
Battery & Task manager don't show any permanent CPU hogs or wake locks.
Device is loaded with a couple of generic apps but not rooted...
With a 4600mAh battery and a the 2000mAh Samsung charger charging at 0.5C the tablet should be finished after roughly 3 hours.
My Note 8 is taking twice the time for half the charge?!
Before giving it a hard reset I would like to know, if someone has an idea / solution.
Thanks again for Your time,
Yoko

That is a worry. I get full charge after about 3 hours on my samsung charger, and about 10% charge per hour on my blackberry charger at work. Mine is the wifi only model though, i dont know how much juice the 3g and what ever other connections you have running will use and if that would make up much difference. Sounds like a significant amount slower though. Do you have access to another 2A charger to see if its a problem with the samsung charger rather than the tablet?

In my case was the faulty charger cable, I was getting nuts searching for help when someone (don't remember which tread was) said about that. There's a free app on playstore that shows you how much current are receiving your device. With that app I realized that it was the cable, not the charger or software related.
Hope that helps.
Sent from a note from another galaxy.

Yokobln said:
Thanks for taking the time...
My Note 8 3g is showing a strange behaviour as of late.
I leave it plugged in the original wallcharger from Samsung, switched on/ 3G active.
Plugging in at roughly 10% that would give me 50-60% in the morning after 7-8 hours.
Battery & Task manager don't show any permanent CPU hogs or wake locks.
Device is loaded with a couple of generic apps but not rooted...
With a 4600mAh battery and a the 2000mAh Samsung charger charging at 0.5C the tablet should be finished after roughly 3 hours.
My Note 8 is taking twice the time for half the charge?!
Before giving it a hard reset I would like to know, if someone has an idea / solution.
Thanks again for Your time,
Yoko
Click to expand...
Click to collapse
I have this issue too. I'm going to try to find a new charger and see if that works.
---------- Post added at 09:20 AM ---------- Previous post was at 08:55 AM ----------
snc74 said:
In my case was the faulty charger cable, I was getting nuts searching for help when someone (don't remember which tread was) said about that. There's a free app on playstore that shows you how much current are receiving your device. With that app I realized that it was the cable, not the charger or software related.
Hope that helps.
Sent from a note from another galaxy.
Click to expand...
Click to collapse
where did you get your new cable?

snc74 said:
There's a free app on playstore that shows you how much current are receiving your device. With that app I realized that it was the cable, not the charger or software related.
Click to expand...
Click to collapse
Can you please say what the app's name is?.. I seem to have charger issues as well.

Spartanus said:
Can you please say what the app's name is?.. I seem to have charger issues as well.
Click to expand...
Click to collapse
Galaxy Charging Current "Lite"

Shofar1 said:
Galaxy Charging Current "Lite"
Click to expand...
Click to collapse
Oh, thanks a lot!

Yokobln said:
Thanks for taking the time...
Before giving it a hard reset I would like to know, if someone has an idea / solution.
Thanks again for Your time,
Yoko
Click to expand...
Click to collapse
I would try, in order:
1. Check your battery stats to make sure nothing weird is chewing up the battery (should be screen, Android OS and possibly Google Services as the top culprits...if there is any *app* above those and you're not really using the app, uninstall it)
2. Bypass a surge protector (if there is one) and plug directly into the wall.
3. Try a different cable
4. Try a different charger
5. Try the charger and cable on a different device that uses 2.1a if possible
If there are no rogue apps, nothing changes and the charger seems to function properly, then you are probably looking at a hardware problem with the device. I would guess a factory reset wouldn't accomplish anything.

also if you are looking for a diff charger make sure the amps are the same. i believe its a 2a charge on this tab. if not then charging will take longer.

Thanks to all Your kind replies!
Sorry for staying quiet for a couple of days, it's been a very busy week for me.
My problem appears to be solved - it has indeed been the USB cord!
Seriously....who would have thought.
I use the exact same cable to charge my HTC One S without an issue.
Thanks again to all of You! :good:
Regards,
Yoko

I faced the same Issue. Just let the battery Drop to %0 and Turned off then let the device pwged in overnight. For me that fix it without using any apps
NB. I know letting Li-ion battery drop to %0 is bad!
good Luck
Sent from my GT-N5100 using xda app-developers app

Samsung Galaxy Tab 3(all models) battery problem solution

Hey guys any of you have problem with your galaxy tab 3 battery.I've got this problem with my galaxy tab 3 sm t211 (quick battery drainage). Symptoms would be your 100% charged tab would go down to 0% in unusual shorter time ( like 2-4 hours). You put it on charger and tab would be charged back to 100% again in substantial short time like 2-3 hours instead of 6-7 hours.
Well, after looking at this issue I think I have come up with solution.
At least, my tab looks like it's back on track... though, to say for sure I would need another couple days of testing.
The problem is not runaway wild application on a background but battery control circuit. This chip reports to OS much smaller battery capacity as it is for some reason. I will not go into details but here is what you need to try:
Flash stock kernel (may be custom kernel is not the reason for bad chip calibration and I'm 90% positive but just to be on safe side). You don't need to do factory wipe in OEM recovery for our purpose.
You also don't need to wipe batterystats.bin or use "Battery Calibration" apps from market (which does exactly the same wipe just in more end user friendly way). This wipe serves no other purpose then refreshing your usage statistics.
You also don't need to drain your battery all way down... nice, this way you don't have to wait for too long.
Well, here we go:
1.Drain your tab battery upto 2 %
2.take a old credit card and start to pull of back cover
3.start from the edges and pull the side bezel that is all around
4.that way your bezels will be pulled that is attached to back cover
5.You will see the area where the battery is attached to device that is at the bottom
7.deatach it using big screw driver when you will pull off the wires which are very tiny in size the black connector will also come of
8.deatach and leave it for 12 minutes
9.place the back cover in place
10.Charge the device fully and it can take upto 5 to 6 hours
Thats it your Galaxy Tab is alright and working perfectly now
Note:1.i will note be responsible is you broke your tab or if anything goes wrong that should note be if you do it carefully
2.if you dont no how to deatache your battery from device from above steps then search on youbtube:"how to replace galaxy tab 3 battery"(the tutorials will be for replacing your battery but dont replace battery just deatach by watching the video)
Click thanks button if I helped

i feeling the same problem on Tab 3 - SM-T211 device
I will try what you suggested and lets see because battery calibration did not help me to come out to the problem .

Thank you for the advice. It helped me to calibrate the battery stats. But I have other more serios problem, not too bad, but very nagging and upsetting. What happens is that my tabet takes practically half a day for charging up the battery. It takes like 12 or more hours to charge up from 0 to 100%. I have tried unplugging the battery as you explained many times, also draining it, but nthing changes. And even worse it is when I'm just plugging my device after totally drained the battery, so when I try to boot my device it may boot up, when it does, after one minute it's turning off because of a suposedly 0% battery. Really I might get either that 0% or 1% battery, but after a minute when I just plug it in and boot up, it may turn off even though I turned off the sceen inmediately.
I think. the problen is maybe on the battery or in the USB port, I have tested many USB cables, many chargers, charging from my PC, but the problem keeps going an and on and on. I would like to know why this problems is happening, if I could fix it up by myself, for instance by replacing the battery or the USB port. This device was a gift, and since I got it I was dithering whether it was normal or not, but by asking soome mates and reading your post I realize that this is not normal.
Hope you read this quick reply. Many thanks for your advice and giving me advice on what and how I should do...

Won't boot or charge

Anyone having problems with it not powering up. It will charge to about 8-12% then shut off. It gets really hot when it's charging but I can't get anywhere with this watch. Getting really frustrated, been trying to get it work for over 5 hrs. Has anyone had this issue?

gshaw1967 said:
Anyone having problems with it not powering up. It will charge to about 8-12% then shut off. It gets really hot when it's charging but I can't get anywhere with this watch. Getting really frustrated, been trying to get it work for over 5 hrs. Has anyone had this issue?
Click to expand...
Click to collapse
Boot it up. Press and hold power button. Chose reset device from menu. When it boots back up don't touch until charged.

Definitely had issues like this. I ultimately exchanged it (got lucky with Best Buy having it in stock) but I read here that you may want to reset it, and charge it while its completely off, to full battery, Before trying to sync and use it. My defective 360 wouldn't even factory reset, so YMMV.

tcollum said:
Definitely had issues like this. I ultimately exchanged it (got lucky with Best Buy having it in stock) but I read here that you may want to reset it, and charge it while its completely off, to full battery, Before trying to sync and use it. My defective 360 wouldn't even factory reset, so YMMV.
Click to expand...
Click to collapse
dottat said:
Boot it up. Press and hold power button. Chose reset device from menu. When it boots back up don't touch until charged.
Click to expand...
Click to collapse
Thanks guys, that worked appreciate it! :good:

Don't pair it to your phone. A service kicks off to do an update but you can't until it's 80% or more charged. As others have said, do the rest then leave it alone.
Same thing happened for me.

reTARDIS said:
Don't pair it to your phone. A service kicks off to do an update but you can't until it's 80% or more charged. As others have said, do the rest then leave it alone.
Same thing happened for me.
Click to expand...
Click to collapse
I'm having the exact same issue. How do you know when it is charged fully? When it is off there is no indicator of charge level. The Galaxy gear and gear live I had both had a battery icon when charging while off. I hope the battery is not a dead since the gear and live watches had awesome battery life for me...

Like a dumbass i tried to pair without fully charging it and was unsuccessful. Now the watch is dead and on the charger. Hopefully it charges or I will have to return this.

It took me about 10 attempted charging cycles over 24 hours before it worked. Usually the watch was off and it would be pretty hot. I noticed the charger was only a .5a so I changed the adapter to a 1.8a one I had. I left the watch on where the blue circle and time was showing and it charged right up from 3 to 100 in about an hour and today I used it from 2pm till 1030 pm with ambient screen and it was down to 39 now on charger for about 20 mins and it is up to 77. So far so good after a nightmarish 1st day...
Sent from my LG-D850 using XDA Free mobile app

yeah, I'm noticing my watch feeling hot while being charged. Sadly, it still won't power on. :crying:

It will, just wait a little while then when it is on the cradle press the power button for 3-5secs then it will come on. On the stock charger you will prob see the power circle start dropping then shut off. Plug in a higher rated Micro USB charger into the dock and it should charge fine.
Sent from my LG-D850 using XDA Free mobile app

bruceo said:
It will, just wait a little while then when it is on the cradle press the power button for 3-5secs then it will come on. On the stock charger you will prob see the power circle start dropping then shut off. Plug in a higher rated Micro USB charger into the dock and it should charge fine.
Sent from my LG-D850 using XDA Free mobile app
Click to expand...
Click to collapse
Yeah, I was @ 3% and charging using the stock and it powered off my itself. but, now I'm on a higher charger so hope things get better. I'm so impatient right now. I just want to start playing with it. hehehe

bruceo said:
It will, just wait a little while then when it is on the cradle press the power button for 3-5secs then it will come on. On the stock charger you will prob see the power circle start dropping then shut off. Plug in a higher rated Micro USB charger into the dock and it should charge fine.
Sent from my LG-D850 using XDA Free mobile app
Click to expand...
Click to collapse
Is this safe for the hardware? My moto 360 keeps floating between two percentages after about 2 hours. I plugged in the charger from my note II, and it seems to charge really quick. But is this higher amperage safe for the moto 360, since the stock is rated at a much lower amperage?

RodrigoKim said:
Is this safe for the hardware? My moto 360 keeps floating between two percentages after about 2 hours. I plugged in the charger from my note II, and it seems to charge really quick. But is this higher amperage safe for the moto 360, since the stock is rated at a much lower amperage?
Click to expand...
Click to collapse
The device will draw what it needs a .5a charger will provide up to that amount of current. a 2a charger will provide up to 2a of current but a device may not pull that much. It is generally thought that for LiIon batteries that providing a low maximum current and taking longer to charge will make the batteries last longer, so if you dont mind a slow charge cycle, which for a watch that should be charged while you are sleeping it doesnt matter then you should go back to the stock adapter to maximize total life.
I went off charger at 7:30am and now at 11 I am at 65%, which is terrible, but I'll wait a week to pass judgement, but my gear live and galaxy gear 1 with tizen both had awesome battery life of 2 full days with more than moderate use.... The Galaxy Gear 1 on Android was lucky to get more than 14 hrs of use.

Thanks everyone for helping me get my Watch up and running. For anyone who is new and reading this, fully charge your watch before pairing it since it will need at least 80% battery so it can update itself. Of course, this has already been stated in the thread and thanks to those folks who stated it already and all the credit goes to them.

I'm having this issue as well. I've been trying to charge it for the past few hours and it never gets past 10%. I kept trying to reset the device and it would never work. It kept coming up in the "Just a minute" mode which seems to eat the battery.
But finally on my last reset attempt, the device rebooted immediately and came back up on the "Select language" screen. I now have the device charging and am hopeful it will work this time.
But my big question is: how do you know when it's fully charged? Without knowing what the current charge level is, I'm afraid to try the update procedure or I may get stuck in the same "Just a minute" loop again. Anyone have any ideas on how to determine the charge level prior to setting up the device?

I killed mine. I tried to pair, got stuck on the "just a minute" screen and then it died. I charged it for a couple of hours and it still would get stuck. Somehow, I got to settings (still don't know how) and did a factory reset. Then, everything seemed ok and it was charged at 100% when I paired and did the update.
However, after the update, I got into a boot loop where it would show the M logo with the marks around the dial, flash to some colored balls, then say "android wear" and then it would reboot. Tech support from Motorola couldn't help me and finally after a few hours the watch died. I put it back on the charger and it would eventually fire back up and go into the bootloop again. It did it all night last night.
Furthermore, my indicator on the charger never lit up either.
I took it back and "exchanged" it for a new one that the store said would ship this week.
As much as I was anticipating this thing showing up, I'm pretty disappointed already.

Finally got mine booted. After successfully resetting the device (back to the "select a language" screen), I had it on the charger for about an hour. Then I tried again and it went through the whole installation successfully.

Ugh! Wish I read this first. Unable to get it to turn on at all, cannot get it charged over 6%

Over Achiever said:
Ugh! Wish I read this first. Unable to get it to turn on at all, cannot get it charged over 6%
Click to expand...
Click to collapse
I was in the same boat. The trick is to get the device reset. When I was trying to do that (via the menu that comes up when you press-and-hold the watch button), it would sit there and do nothing. Then 10 seconds later it would power down. But then as it charged, it would power back up and the "Just a minute" message would appear.
To get it to work, I turned the device off and let it charge. When it powered back on, I turned it off immediately and kept charging it. Then eventually, the charge jumped up to about 13%. I tried the device reset option again and this time it powered down immediately and booted back up with the "select a language" screen. I then turned off the display and let it charge for an hour. After that, I went through the setup and it worked.

DanPLC said:
I was in the same boat. The trick is to get the device reset ... After that, I went through the setup and it worked.
Click to expand...
Click to collapse
Thanks Dan, that did the trick. I see the firmware update added quite a few watch faces but can't customize the colors on those until the Connect app is updated.
Waiting for the watchface contest winner to be released by Motorola!

charging issue

is there anyone with problems charging the t320?
it goes fine until 40%, above that or stops charging or is really slow, like 1% in one hour.
i thought it was a rom issue, so i flashed the original rom from sammobile
the charging at this moment is 56%, 150mA average, when isn't negative - 200
this is stock usb and charger, and also with other charger/cable is the same

Me too
monteiro-ribas said:
is there anyone with problems charging the t320?
it goes fine until 40%, above that or stops charging or is really slow, like 1% in one hour.
i thought it was a rom issue, so i flashed the original rom from sammobile
the charging at this moment is 56%, 150mA average, when isn't negative - 200
this is stock usb and charger, and also with other charger/cable is the same
Click to expand...
Click to collapse
I was just searching the forums as bought mine yesterday and have a similar problem, mine got to 56% then stopped charging. If i turn off the tablet it does start to charge again so will fully charge with it powered down and see what happens.

soon i'll be testing another charger
you can see the charging voltage on the galaxy charging current available on playstore
most likely i will use warranty

monteiro-ribas said:
soon i'll be testing another charger
you can see the charging voltage on the galaxy charging current available on playstore
most likely i will use warranty
Click to expand...
Click to collapse
@tidy01
Pop the back off gently and disconnect the battery from the main board. When you reconnect it, let it charge up fully before turning it back on. After this, it will behave normally for the rest of time.

Thanks
dottat said:
@tidy01
Pop the back off gently and disconnect the battery from the main board. When you reconnect it, let it charge up fully before turning it back on. After this, it will behave normally for the rest of time.
Click to expand...
Click to collapse
Thanks for the reply but it seems my issue was caused by a faulty outlet socket. The socket works fine for everything else but would only charge the tablet when it was powered down. Tried charging off my laptop and desktop usb and it was the same, but tried some other outlet sockets and they charge fine. I understand the usb outlets might not provide enough to charge the tablet but hadn't considered the socket as I know it works, must be just enough high resistance to prevent it charging a working tablet but provides enough current to charge it when it's powered down. The fact it was showing a 56% charge was just co-incidence.
Thought it might be worth posting this as it's not something I've come across before.

tidy01 said:
Thanks for the reply but it seems my issue was caused by a faulty outlet socket. The socket works fine for everything else but would only charge the tablet when it was powered down. Tried charging off my laptop and desktop usb and it was the same, but tried some other outlet sockets and they charge fine. I understand the usb outlets might not provide enough to charge the tablet but hadn't considered the socket as I know it works, must be just enough high resistance to prevent it charging a working tablet but provides enough current to charge it when it's powered down. The fact it was showing a 56% charge was just co-incidence.
Thought it might be worth posting this as it's not something I've come across before.
Click to expand...
Click to collapse
Here's the thing. When mine was misbehaving I could get it to start charging again by switching outlets or even reversing polarity on the wall plug. It was a temporary fix as within days the problem would be back. I thought I had it fixed so many times. It always came back. If it happens to you again just remember the above post. It's been four months since I did it and never once has it been quirky. Something in the hardware needed reset that only disconnecting the battery could do.

dottat said:
Here's the thing. When mine was misbehaving I could get it to start charging again by switching outlets or even reversing polarity on the wall plug. It was a temporary fix as within days the problem would be back. I thought I had it fixed so many times. It always came back. If it happens to you again just remember the above post. It's been four months since I did it and never once has it been quirky. Something in the hardware needed reset that only disconnecting the battery could do.
Click to expand...
Click to collapse
Thanks once again, I will keep this in mind if does happen again.

dottat said:
@tidy01
Pop the back off gently and disconnect the battery from the main board. When you reconnect it, let it charge up fully before turning it back on. After this, it will behave normally for the rest of time.
Click to expand...
Click to collapse
Hi, I have this problem also, as well as random reboots. I just want to ask you on how to take the back off of the Tab Pro 8.4?
Cheers

Zakanam said:
Hi, I have this problem also, as well as random reboots. I just want to ask you on how to take the back off of the Tab Pro 8.4?
Cheers
Click to expand...
Click to collapse
Very gently use something like a guitar pick or a credit card to pry it up around the edges

dottat said:
Very gently use something like a guitar pick or a credit card to pry it up around the edges
Click to expand...
Click to collapse
Thanks for your reply. Would you pry the back faux leather cover from the back, or from the front via the glass screen (like in note 10.1 2014)?
I wouldn't want to break my tab he he thanks

Zakanam said:
Thanks for your reply. Would you pry the back faux leather cover from the back, or from the front via the glass screen (like in note 10.1 2014)?
I wouldn't want to break my tab he he thanks
Click to expand...
Click to collapse
It's the faux leather thing you pry off. Keep the angle that you pull on the cover shallow and work it slowly.

dottat said:
It's the faux leather thing you pry off. Keep the angle that you pull on the cover shallow and work it slowly.
Click to expand...
Click to collapse
with no other solution i did too pop the back off gently and disconnect the battery from the main board, now it's working OK, let's see how long

cabel pull
hoping this works. I just filled out a warranty email today for same issue on 12.2 Tab Pro. It pried the case open with a credit card. Very slow, took about 7 minutes. Pulling the power cable in the middle, probably behind green tape. Use needle nose pliers or something small behind the wires and pull up. The pins are tiny and will f*ck the whole thing up if bent.
I get the feeling that the screen turns itself on even when eye tracking settings are off or closed in case. I hear the annoying sound at night when charging. Why Sammy does not have a smart current sensor built in is insane. Asking you to unplug when most people will leave on and charge overnight. Just dumb.
I can't get past 57% charging for last 2 weeks. Stock, unrooted for first time in a long time, so I am pissed to hear ROM had not effect. This is likely undocumented hardware issue Sammy doesn't want to admit to.

even on my T325 I had the same problem but I solved it this way ...
I have worn the battery completely until turn off my device, I loaded the battery overnight to device OFF.
wipe and install rom custom samsung
I launched and used app "battery calibraton" (root)
I have now done 4 cycles of charging to 1600/1750 mA

house66 said:
even on my T325 I had the same problem but I solved it this way ...
I have worn the battery completely until turn off my device, I loaded the battery overnight to device OFF.
wipe and install rom custom samsung
I launched and used app "battery calibraton" (root)
I have now done 4 cycles of charging to 1600/1750 mA
Click to expand...
Click to collapse
The battery "unplug" works....

monteiro-ribas said:
with no other solution i did too pop the back off gently and disconnect the battery from the main board, now it's working OK, let's see how long
Click to expand...
Click to collapse
Still good?

mgp53 said:
The battery "unplug" works....
Click to expand...
Click to collapse
There is no need for physical interventions on the hardware, maybe someone does not know in depth the behavior of lithium ions

house66 said:
There is no need for physical interventions on the hardware, maybe someone does not know in depth the behavior of lithium ions
Click to expand...
Click to collapse
Perhaps not, but I and MANY others have encountered the same problem. Across multiple Roms, fully discharging and recharging, running the so called calibration apps. Rebooting, unpluggin, replugging. The problem NEVER fully went away. It would work for a charge cycle or two or three, then would reappear.
I finally took the back off, unplugged and replugged the connector., closed up the case, charged it for several hours before turning it back on.
Not ONCE has the problem occurred since that intervention. That was over a month ago.
Maybe it's not lithium ion behavior, it might be in the charging circuit and hardware.
If you have a suggestion, then by all means share it so others can solve their problem.

mgp53 said:
Perhaps not, but I and MANY others have encountered the same problem. Across multiple Roms, fully discharging and recharging, running the so called calibration apps. Rebooting, unpluggin, replugging. The problem NEVER fully went away. It would work for a charge cycle or two or three, then would reappear.
I finally took the back off, unplugged and replugged the connector., closed up the case, charged it for several hours before turning it back on.
Not ONCE has the problem occurred since that intervention. That was over a month ago.
Maybe it's not lithium ion behavior, it might be in the charging circuit and hardware.
If you have a suggestion, then by all means share it so others can solve their problem.
Click to expand...
Click to collapse
I've already written how I solved the problem, but in 5 years and dozens of Android rom installed on various devices, this problem for me was very frequent.
Always the same. On my ST325 I solved like other times in the past.
No news I found on this battery, battery charger of the same problems since I know Android

*mgp53
sorry for my bad English ...
for this device I've tried all the roms available (CM11 or not)
the problem is very acute especially after CM11> Pro Plus V2, but the problems had already occurred some time with the various installations buil CM11
about a week I did the operation described above (already done in the past even on my previous samsung device, Note 1, Galaxy s4, Galaxy Mega, Galaxy tab 3 g3 ) with the same result ...
The battery charges very quickly with the device ON to 1700 mA (monitored with "Monitor battery widgwt pro")
again sorry for my english

[Q] Tablet Refuses to power on

Hello XDA members. I have a very troublesome issue with my galaxy tab 3 7.0 inch tablet. It will NOT turn on at all, no battery charging, no device power on, no comp recognition, nothing. I have already tried:
Letting it charge overnight (factory charger along with others) with several known working cables
Unplug battery for 5 minutes
Press and hold power, Vol Down, and home for 10 sec, 30 sec, and 1 minute
Press and hold power and vol down for 10,30,60 seconds.
I sent it in for repair and they wouldnt fix it because it's rooted. When I got it back it briefly turned on to the battery charging, but nothing since. I'm thinking there must have been some way they got it on.... All proper drivers are installed on PC and it's never been dropped, water damaged, etc.
Would anyone be able to provide insight as to why and provide a fix?

My 8 inch tab 3 wasn't coming on either a few days back, I got it back on by holding home and the power button for a while. I was about to give upwhen the battery charging image came on. I think I did the same again and it came on normally.

a97antonio said:
My 8 inch tab 3 wasn't coming on either a few days back, I got it back on by holding home and the power button for a while. I was about to give upwhen the battery charging image came on. I think I did the same again and it came on normally.
Click to expand...
Click to collapse
Was that from computer or wall?

From wall, it was about 3/4 charged by then

a97antonio said:
My 8 inch tab 3 wasn't coming on either a few days back, I got it back on by holding home and the power button for a while. I was about to give upwhen the battery charging image came on. I think I did the same again and it came on normally.
Click to expand...
Click to collapse
a97antonio said:
From wall, it was about 3/4 charged by then
Click to expand...
Click to collapse
Still no luck... I can feel the tablet getting hot down at the charge port so I know it's charging, and i know the lcd isn't damaged.

Mine is in the same condition. Anyone know how or why this happens and how to fix it?
Sent from my LG-LS980 using Tapatalk

Not sure if this will help, but just like with phones, sometimes android tablets just need a battery pull. My kids xo tablet went dead and before I tossed it in the trash I took the housing off and had to clip the + wire since it was soldered to the board. Twisted it back together to check and sure enough the tablet powered on like normal. Ive had to pull the battery on an Sm-t217a and it was a lot easier. They have a removable clip that attaches to the board.
Sent from my SAMSUNG-SM-T217A using XDA Premium 4 mobile app

I think it might be the battery itself. Just for giggles I left it plugged in for days and i just checked back on it and the Battery charging screen kept flashing on and off. Won't hold any charge. Probably will just order a new battery and see what happens. I pulled the battery a couple times and nothing happened. Closer inspection found that the tech that looked at it damaged the battery cord (unless it came with the copper on the wiring already exposed...)

xkn0s said:
I think it might be the battery itself. Just for giggles I left it plugged in for days and i just checked back on it and the Battery charging screen kept flashing on and off. Won't hold any charge. Probably will just order a new battery and see what happens. I pulled the battery a couple times and nothing happened. Closer inspection found that the tech that looked at it damaged the battery cord (unless it came with the copper on the wiring already exposed...)
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You might be right about the battery being dead, although they usually don't just go all at once like that. The charge indicator flashing is odd. The only thing close I've seen is an "x" over the icon when there aren't enough amps (my tab needs 2 amps. 1 amp chargers and some pc usb ports give me the x.
If you have an old cable you can cut, you could try to charge the battery itself to see if it takes a charge (or at least use a multimeter on it to check for voltage). Then you could narrow it down a bit to whether it is the battery or possibly the charge port/hardware..... I saw a bit of exposed wire just before the clip of mine too, made me extra careful pulling the clip up.

rmntruexjr said:
You might be right about the battery being dead, although they usually don't just go all at once like that. The charge indicator flashing is odd. The only thing close I've seen is an "x" over the icon when there aren't enough amps (my tab needs 2 amps. 1 amp chargers and some pc usb ports give me the x.
If you have an old cable you can cut, you could try to charge the battery itself to see if it takes a charge (or at least use a multimeter on it to check for voltage). Then you could narrow it down a bit to whether it is the battery or possibly the charge port/hardware..... I saw a bit of exposed wire just before the clip of mine too, made me extra careful pulling the clip up.
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I wouldn't even know where to start with the wiring. Multimeter isn't something I have access to, and it seems a little complicated for me to spend time on.
When I say it's flashing, I mean the device powers on to the battery charging screen, then dies, wash rinse repeat. If I go into recovery, same thing. It all happens within a couple seconds, so it's hard to describe.
My dad has one that I can pull the battery from, I might do that. Batteries are like 20 bucks on amazon, so I think I'll test with my Dads and if it works just order a battery and report back here.

similar problem here
rmntruexjr said:
You might be right about the battery being dead, although they usually don't just go all at once like that. The charge indicator flashing is odd. The only thing close I've seen is an "x" over the icon when there aren't enough amps (my tab needs 2 amps. 1 amp chargers and some pc usb ports give me the x.
If you have an old cable you can cut, you could try to charge the battery itself to see if it takes a charge (or at least use a multimeter on it to check for voltage). Then you could narrow it down a bit to whether it is the battery or possibly the charge port/hardware..... I saw a bit of exposed wire just before the clip of mine too, made me extra careful pulling the clip up.
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Click to collapse
My daughters tab 3 7 inch T210 also refuses to start. First time it was fixed by opening the device and disconnecting the battery. Now that doesn't help anymore. If I attach the original charger and measure the voltage when the device has rested for some months I can see that the voltage slowly rises so it seems to do the charging even if there is no sign of charging on the screen. After some hours of charging I measure 3,78V on the battery, after disconnecting the battery.
If I attach the battery and turn on the device I measure 3,76V before I push the start button and 3,74V directly after pushing the button. After about 15s the voltage goes back to 3,76V. Nothing happens on the screen... Tried with different combinations of pushing on-button and volume up, volume down, menu....
So -the best thing would of course be a quick visit to local shop to buy a new device of another brand but for some reason I refuse to give up.
Any advice would be appreciated.
(I Have made no significant modifications but the 4-year old daughter may have contributed in an unknown way )

magnusn68 said:
My daughters tab 3 7 inch T210 also refuses to start.
So -the best thing would of course be a quick visit to local shop to buy a new device of another brand but for some reason I refuse to give up.
Any advice would be appreciated.
(I Have made no significant modifications but the 4-year old daughter may have contributed in an unknown way )
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Click to collapse
The better way to test if your tablet can turn on: buy a new battery, under $15 on Ebay since your old battery is dead or completely drained.
Use the new battery to turn on your tablet. If it's on, check the build number of your device after go to About My Device: if it's not end with OB1, the latest firmware which fix charging issue.
It's more likely your build number is MK1 to NI1, the build numbers count by alphabet order. Upgrade the software via Wifi, battery must be at least 25%, otherwise your tablet won't allow you to upgrade. Bring the firmware to the current OB1, your tablet should take charge normally, otherwise the USB charging port is defective or damaged. This micro USB is cheap, around $2, but it need to solder to motherboard to replace the defective one.